New Cretaceous turbiniform vetigastropods (Gastropoda) from the Pacific slope of North America

2011·9.5 MB·English

by  Richard L Squires

1
THE NAUTILUS 125(4):193-206, 201 Page 193
New Cretaceous turbiniform vetigastropods (Gastropoda) from
tlie Pacific slope of North America
Richard L. Squires
DepartmentofGeological Sciences
California State University
Northridge, CA91330-8266 USA
and
Invertebrate Paleontology1
Natural HistoryMuseum ofLos Angeles County
LosAngeles, CA90007USA
[email protected]
ABSTRACT rare. The significance of this study is that the species
represent either the earliest record of their genus or the
Seven new species of warm-temperate, shallow-marine first record of their genus in the Western Hemisphere.
turbiniform vetigastropods are described from Cretaceous In addition to the description of the new species, their
Cstorlautambiina,thetorengoirotnheerxntenBdaijnagCfarloifmorVnaina,couMevxeircoI.slaTndh,eBrcihtiilsoh- biostratigraphy is established. During the course of this
dontineAgatliodonta haegerti newspecies (latest Santonian) is study, it was discovered also that Trochacanthns
the first confirmed species ofthis extant genus in the Western wallalense (White, 1885), is the senior synonym of
Hemisphere. The ealliotropine Cidarina grahami new species Trochacanthus pacificus Squires and Saul, 2001. The
(middle Campanian) is the earliest record ofthis extantgenus. first photographs ofWhite’s holotype are provided here,
The colloniines Afrollonia elderensis newspecies (late Albian) as well as the morphologic redescription and geologic
andAntillocollonia bos new species (Turanian) are the earliest age refinement ofhis species.
records of these extinct genera in Western Hemisphere. The The designated areas (e.g., Area 3) where the species
teguline Tegula daileiji newspecies (late Campanian) is one ol were collected are shown on Figure 1. The details ofthe
the few known Campanian species of this extant genus. The type localities are given in Appendix 1. As discussed by
margaritines Pupillaria encina new species and Pupillaria Saul and Squires (2008) and Squires and Saul (2009),
lomana new species (both of which are late Campanian to
possibly early Maastrichtian in age) are the earliest records of localities west ofthe San Andreas Fault have been tec-
thisextantgenus. tonically transported, and localities in British Columbia
During the course ofthis study, it was discovered that the most likely have been tectonically transported from
nododelphinulid Trochacanthns wallalense (White, 1885) (late northern California. The temporal ranges of all the stud-
Campanian to early late Maastrichtian) is the senior synonym ied species are plotted on Figure 2. Their combined
of T. pacificus Squires and Saul, 2001. White’s species is the Cretaceous record in the study area spans the middle
only known occurrence of this extinct genus in the Western Albian to late Maastrichtian, aninterval ofapproximately
Hemisphere. 38 million years. The paleoelimate that prevailed in the
Additional keywords: Amberleyoidea, Seguenzioidea, study area when the new species lived was generally
Turbinoidea warm temperate (Saul and Squires, 2008; Squires and
Saul, 2009).
MATERIALS AND METHODS
INTRODUCTION
This study is based on 65 specimens borrowed from
This study concerns turbiniform vetigastropods from museum collections. Preservation ofthe shell material is
shallow-marine Cretaceous rocks in the region extending generally good, but nearly all the nacre has been
from Vancouver Island, British Columbia, Canada, to replaced by caleite. Knowledge about the umbilical area
northern Baja California, Mexico (Figure 1). These gas- is critical in distinguishing turbiniform-vetigastropod
tropods comprise eight genera and eight species; seven taxa. Some of the specimens already were already
ofthe species are new. Nearly all ofthe species are very cleaned by L. R. Saul and the late W. P. Popenoe. A few
additional specimens were cleaned by the author and
1 Research Associate L. R. Saul. The cleaningwas done mainlyby means ofa
PagOe 194 THE NAUTILUS, Vol. 125, No. 4
Figure 2. Geologic ranges of the studied species. Ages of
stageboundaries from Gradsteinetal. (2004).
Point Loma Formation (Squires and Saul, 2001);
Cabrillo Formation (Squires and Saul, 2009); Gualala
Formation (Squires and Saul, 2004b); and Moreno For-
mation, “Garzas Sand" and “Quinto Silt” members
(Squires and Saul, 2003b).
Abbreviations used for catalog and locality numbers
are: LACM, Natural Histoiy Museum of Los Angeles
sFtiugduireedt1r.ochLiofcoarlmitvieetsigmaasptroapnodds.latitudinal distribution of the CRoBuCntMy,, IRnovyearltebBrraitteisPhalCeoonltuomlboigay SMeuctsieounm,(LAVCicMtIoPri)a;;
SDSNH, San Diego Society ofNatural History; UCMP,
high-speed drill with diamond-coated grinding wheels, University of California Museum of Paleontology
but, it was also necessary to use hand-held, very sharp (Berkeley); and USNM, National Museum of Natural
needles to clean the umbilical area on some of the History, Smithsonian Institution.
smaller specimens.
The sequence ofthe treatment ofthe studied taxa in
the “Systematic Paleontology” section mainlyfollows the SYSTEMATIC PALEONTOLOGY
classification scheme of Waren and Bouehet in Bouchet
and Rocroi (2005: 243-245), modified to include the Clade Vetigastropoda Salvini-Plawen, 1980
results from Williams et al. (2008). Most ofthe morpho- SuperfamilyAmberleyoideaWenz, 1938
logic terms follow the usage of Cox (1960). The term Family Nododelphinulidae Cox, I960
“periumbilical cord” (i.e., a spiral cord extending from Genus Trochacanthus Dacque, 1936
the parietal region downward to the eolumellar lip) fol-
lows the usage ofMonari et al. (1996). Type Species: Trochus turberculatocintus Minister
Current summaries of the geological details of the in Goldfuss, 1844, by subsequent designation (Wenz,
formations and members containing the studied spec- 1938); Late Cretaceous, Europe (Polandand Germany).
imens can be found in the following papers (listed in
ascending ehronostratigraphic order): Venado Sand- Description: Shell size small to medium. Turbinate.
stone (Squires and Saul, 2004a); Redding Formation, Phaneromphalous. Spire whorls with strong collabral
Bellavista Sandstone and Frazier Siltstone members libs. Last whorl (on adults) deviantly coiled relative to
(Squires and Saul, 2003a); Panoche Formation in Arroyo spirewhorls. Last whorl with single keel coincident with
Pinoso, ReefRidge area (Stewart, 1946); upper Haslam periphery. Umbilicus bearing thin radiating ribs sepa-
Formation (Squires and Saul, 2001); upper Cedar Dis- rated bysunken areas.
trict Formation, west side of Denman Island (Squires
and Saul, 2006); jalama Formation (Squires and Saul, Discussion: Except for Trochacanthus wallalense
2003b); Rosario Formation (Squires and Saul, 2001); (White, 1885), discussedbelow, the onlyotheroccurrences
R.L. Squires, 2011 Page 195
(UCMP loc. A-3224) in Merced County, California and
from the Rosario Formation (UCMP loc. A-6274) at
Punta SantoTomas, Baja California, Mexico.
Superfamily SeguenzioideaVerrill, 1884
Family Chilodontidae Wenz, 1938
Subfamily Chilodontinae Wenz, 1938
GenusAgathodonta Cossmann, 1918
Type Species: Agathodonta elegans (Deshayes in
Leymerie, 1842 [= Trochus dentigerus d’Orbigny, 1842:
185, pi. 177, figs. 9-12]), by subsequent designation
(Kollmann,2005: 70-71); EarlyCretaceous (Hauterivian),
France.
Description: Shell size small to medium (height 10 to
34 mm). High fusiform. Suture deeplyindented. Whorls
deviantlycoiled. Spiral cords strongandbeaded to gran-
Figures 3-6. Trochacanthus wallalcnse (White, 1885), holo- ulose. Outer lip variced and stronglyprosocline; interior
type USNM 13412, from near Gualala, California, height 16.7 of lip thickened by apertural ridge with lira. Parietal
mm, diameter21.5mm. 3. Aperturalview. 4. Abaperturalview. callus well developed. Columella with two widely sepa-
5. Umbilicalview. 6. Apicalview. rated teeth, posterior tooth strongest and located poste-
riorly up into aperture. Pustules can be present anterior
ofthis genus are from Santonian to Maastrichtian rocks to anterior tooth on columella shield (at anterior end of
of western Germany and lower Campanian to upper columella). Operculum chitinous. Interior nacreous.
Maastrichtian rocks of central Poland (Dacque, 1936;
Discussion: Priortowork by Kollmann (2005: 70-71),
Kollmann, 1985; Abel-Gawad, 1986).
earlierworkers cited the type species ol Agathodonta as
Trochacanthus waUalense (White, 1885) being Trochus dentigerus d’Orbigny, 1842, from France.
(Figures 3-6) Cossmann (1918: 200-201, pi. 7, figs. 8-11) discussed
and figured this species, which lie identified as
Solarium waUalense White, 1885: 14, pi. 5, figs. 1, 2. Chilodonta (Agathodonta) dentigera. Wenz (1938: 298,
Trochacanthus pacificus Squires and Saul, 2001: 49, 51,
fig. 653) illustrated the holotype, which he identified as
fig. 3.6-3.11. Agnatlwdonta [sic] dentigera. Cox (I960: 249, fig. 160, 2)
Holotype: USNM 13412, height 16.7 mm, diameter also figured the holotype, and like Wenz, considered
21.5 mm. Agathodonta to be a distinct genus within the
chilodontines. Cossmann (1918) and Wenz (1938)
Type Locality: Nearthe town ofGualala [=Wallalaol reported the range ol Agathodonta to be Neocomian to
White (1885)], Mendocino County, northern California. Albian, but McLean (1984) established that this
ehilodontine genus ranges into the Recent, where it is
Geologic Age: Late Campanian to early late represented by a single species (see also Hickman and
Maastrichtian. McLean, 1990: fig. 40E) from archibenthal (300 m)
Distribution: Gualala Formation, Mendocino County, depths in the Philippines.
northern California (Area 5); Moreno Formation, infor- Based on its overall shape and sculpture, the new
mal Quinto member, Los Banos area, Stanislaus Coutny, genus isveiysimilartothe ehilodontine Danilia Brusina,
Cnaorrltshbeardn, CSaalnifoDrineigao(CAoruenaty6,);soPuoitnhternLoCmalaifoFronrimaat(iAorne,a C1a8l6c5a,raw,ho18s3e9,tyfpreomsptehceieMsedisittehrereaxnteaanntSMeoan.oWdeonnzta(1t9i3n8e:i
9); Rosario Formation, Punta Santo Tomas [= Puerto 273, fig. 572) illustrated the holotype. Beu and Climo
Santo Tomas], BajaCalifornia, Mexico (Area 11). (1974) reported that Danilia ranges from Albian to
Recent, with the fossil species mainly of Cenomanian
Discussion: The holotype of this species, which is a age in Europe. They reviewed the taxonomy of Danilia,
weathered specimen whose sculpture on the spire is not compared its fossil and Recent species, and illustrated
well preserved, is photographed here for the first time, two modern species of this genus from New Zealand.
with more views than White (1885) provided in his Agathodonta differs from Danilia by having two colu-
sketches. Prior to this present report, this species was mellar teeth instead of just one, teeth not showing a
known only from its type locality in the Gualala Forma- notched appearance, and (on some species) no pustules
tion in Mendocino Countyand [as T. pacificus from the on columellar shield. Agathodonta superficially resem-
]
Point Loma Sandstone in San Diego County. Additional bles the calliotropine Cidarina Dali, 1909 in terms of
single specimens were detected during this present shape and sculpture, but the latter is smaller and does
investigation in collections from the Moreno Formation not have anycolumellarteetli or a flared outer lip.
Page 196 THE NAUTILUS, Vol. 125, No. 4
Figures 7-17. Newehilodontine and newcalliotropine. Specimens coatedwith ammoniumchloride. 7-12.Agathodontahaegerti
new species, holotype RBCM.EH2008.011.06500, Nanaimo area, British Columbia, height 33 mm, diameter 23 mm. 7. Apertural
view. 8. Oblique aperturalview. 9. Abapertural view. 10. Right-lateralview. 11. Left-lateralview. 12. Apical view. 13-17. Cidarina
grahami newspecies,holotype RBCM.EH2010.004.00001,westshoreofDenmanIsland, BritishColumbia,height 18mm, diameter
13.5 mm. 13. Aperturalview. 14. Abaperturalview. 15. Right-lateralview. 16. Apicalview. 17. Anterior(ventral) view.
Based on reports byearlierworkers (Cossmann, 1918: 1.5 times greater than shell diameter. Ovate conical.
200; Wenz, 1938: 298; Keen, I960: 1249; McLean, 1984; Anomphalons. Spire elevated, height approximately
and Kollrnann, 2005: 70-71), the geologic range of 20% (estimated) of shell height. Pleural angle approxi-
Agathodonta is EarlyCretaceous (Hauterivian toAlbian) mately 75°. Protoconch and uppermost spire unknown.
to Recent, with its fossil occurrences restricted to Teleoconch at least four whorls. Suture deeply
Europe. Agathodonta haegerti new species, discussed impressed, almost caniculate. Coiling deviant. Whorls
below, is ol latest Santonian age in British Columbia and inflated, rounded. Shoulder very narrow. Sculpture of
is the firstconfirmedspecies ol this genus in theWestern strong widely spaced spiral ribs: four ribs on antepenul-
Hemisphere. timate whorl, six on penultimate whorl, and 14 on last
Agathodonta haegerti new species whorl. Interspaces between spiral ribs usually uniformly
(Figures 7-12) twice as wide as ribs, except near shoulder where inter-
spaces are three times as wide as ribs. Spiral ribs on
Description: Shell size medium small (height 34 m, antepenultimate whorl uniformly beaded; posteriormost
diameter22 mm, same specimen). Height approximately two spiral ribs noded on penultimate and last whorl,
R.L. Squires, 2011 Page 197
otherspiral ribs beaded. Aperture large, elliptical. Outer Type Species: Margarita cidaris A. Adams in Carperi-
lip with varix; interior ol outer lip flared and smoothish. ter. 1864, by original designation; Pleistocene to Recent,
Innerlipwithtwowidelyseparatedteeth, posteriortooth living in Alaska to northern Baja California, Mexico
strongest and locatedposteriorly up into aperture. Colu- (Squires and Saul, 2003b).
mellar shield present in parietal area and smooth, wid-
ening posteriorward. Growth lines prosocline. Interior Description: Shell size small to medium, thin. Ovate
nacreous. conical. Anomphalous. Spire elevated. Sculpture of
coarse nodes or beads formed at intersections of spiral
Holotype: RBCM.EH2008.011.06500, height 33 mm, andcollabralsculpture, sculptureweakestanteriorto last
diameter 23 mm. whorl periphery, aperture nearly circular and oblique.
Umbilicus covered by thin columellar callus. Interior
Type Locality: Locality 1 (see Appendix I). nacreous (Squires and Saul, 2003b).
GeologicAge: Latest Santonian. Discussion: In their list of calliotropines having a fos-
sil record, Hickman and McLean (1990: 79-80) did not
Distribution: Haslam Formation, upper part, just include the extant genus Cidarina. Squires and Goedert
west ofNanaimo, east coast ofVancouver Island, British (1995) and Squires and Saul (2003) subsequently
Columbia (Area 2). established that Cidarina does have a fossil record.
Cidarina grahami new species is the earliest Cidarina.
Etymology: The species is named for foe Haegert Onlv four fossil species of Cidarina were previously
who collected the holotype. known: Cidarina cretacea Squires and Saul (2003b) of
upper Campanian to mid Maastrichtian age from the
Discussion: The newspeciesisbasedon asingle spec- southern half of California; Cidarina beta Squires and
imen. It is well preserved and is most similar to the Saul (2003b), ofmid-Maastrichtian age fromcentral Cal-
extant Agathodonta nortoni McLean (1984: 122-123, ifornia; Cidarina antiqua Squires and Goedert (1995) of
figs. 1-3; Hickman and McLean, 1990: fig. 40, E) from middle Eocene age (“Tejon Stage”) from southwestern
the Philippines. The new species differs byhaving much Washington; and Cidarina cidaris (A. Adams in Carpen-
larger size, deviantly coiled whorls, stronger spiral ribs ter, 1864) of early Pleistocene to Recent age on the
on shoulderoflastwhorl, morewidelyspaced spiral ribs, Pacific slope of North America from Alaska to northern
absence ofhaving its nodes aligned in distinct collabral BajaCalifornia (Grant and Gale, 1931).
rows, outer lip lirae weaker and corresponding to spiral
ribs rather than to their interspaces, columellar teeth Cidarina grahami new species
much farther apart, anterior tooth weaker, and absence (Figures 13-17)
ofpustules on the columellar shield.
The new species is similar to the extant Danilia Diagnosis: Cidarina with medium shell size, spiral
insperata Beu and Climo (1974: 316, figs. 10-13) from ribs nodose posterior to periphery, spiral ribs on base
NewZealand. The newspecies differs bytwo columellar closelyspaced, base oflastwhorlbearingweakspiral ribs
teeth ratherthan one, parietal callus, no denticles on the with numerous, closely spacedminutenodes.
outer lip, and no pustules on the columellar shield. The Description: Shell size medium (height 18 mm, diam-
newspecies has the same shape asAgathodonta?hrooksi eter 13 mm, same specimen). Height approximately 1.4
Allison (1955: 411, pi. 40, fig. 6) from upperAptian strata times shell diameter. Ovate conical. Spire elevated,
in BajaCalifornia, Mexico. Allisonwas hesitantaboutthe approximately 35% of shell height. Pleural angle 64°.
generic assignment of this species because ol the pres- Protoconch and upper spire unknown. Teleoconch
enceofanarrowumbilicus. The newspeciesdiffers from
Allison’s species by having much coarser sculpture that incomplete, at least three whorls. Suture apparently
impressed. Spire whorls flat-sided, body whorl convex,
weakens ratherthanstrengthenstowardthe anterior, two
rounded but with peripheral angulation. Shell surface
rather than a single columellar fold, and no umbilicus.
covered by spiral ribs: four on ante-penultimate whorl,
Future collecting might show that Allison’s species
five on pentultimate whorl, six on posterior half (includ-
belongs in genus Danilia.
ing peripheral angulation) of lastwhorl, and ten on base
SubfamilyCalliotropinae Hickman and McLean, 1990 of body whorl. Spiral ribs bearing fine beads on upper
spirewhorls and on base oflastwhorl; spiral ribs bearing
Discussion: Kiel and Bandel (2001: 140) stated that medium-strengthbeadsonpenultimatewhorl; spiral ribs
they did not find Hickman and McLean’s definition of bearing strong nodes on posterior halfof last whorl and
Calliotropinae to be “useful. " Instead, they placed on first rib anteriortoperiphery, with strongest nodes on
Cidarina Dali, 1909 in Chilodontinae Wenz, 1938 peripheral angulation. Aperture moderately elliptical.
because Cidarina has a thick shell, whereas Outer lip thin. Inner lip and columella with grooved
Calliotropinae is characterized bythin shells. callus closing off umbilicus. Callus wash extends over
parietal area. Growth lines prosocline, tilted 16 from
Genus Cidarina Dali, 1909 vertical.
PagOe 198 THE NAUTILUS, Vol. 125, No. 4
Holotype: RBCM.EH2010.004.00001, height 18 mm, where intersected by carination of umbilical margin;
diameter 13.5 mm. umbilical rim usuallyprominent and crenulated, interior
of umbilicus with periumbilical cord ending in a wide
Type Locality: Locality2 (see Appendix 1). process on columella (Adegoke, 1977; Kase, 1984).
Geologic Age: Late middle to early late Campanian Discussion: Afrollonia is similar to genus Collonia
(Metaplacenticeras cl. pacificum ammonite zone). J. E. Gray in M. E. Gray, 1850, but differs from the
latter by having sculpture. Although Adegoke (1977)
Distribution: Cedar District Formation, upper part, assigned Afrollonia to subfamily Colloniinae, Kase
west side ol Denman Island offeast coast ol Vancouver (1984) assigned this genus to subfamily Margaritinae
Island, British Columbia (Area 1). Stoliczka, 1868 based on the similarity ofAfrollonia to
Etymology: The species is named for Raymond Gra- Atira Stewart, 1927, which was originally proposed as a
ham,whoinformedtheauthorabouttheexistenceolthis subgenus ofMargarites }. E. Gray, 1847 (ex Leach ms.).
This similarityis superficialbecauseAfrollonia is charac-
species.
terized by a periumbilical cord; no such feature is
Discussion: Thenewspecies is basedonasingle spec- presentonAtira.
imen, which has good preservation. The new species is Afrollonia has been reported only from Paleocene
most similar to Cidarina cretacea Squires and Saul strata in Egypt, Nigeria, and Togo, Africa (Adegoke
(2003b: 52, fig. 2.1-2.4) from Maastrichtrian strata of 1977). Afrollonia elderensis new species, described
central California and (newinformation) trom the upper below, is the earliest confirmed record ofthis genus and
Campanian to possibly lower Maastrichtian Point Loma its only recordin theWestern Hemisphere.
Formation at the Carlsbad Research Center, San Diego Afrollonia elderensis newspecies
County, southern California. The new species differs (Figures 18-23)
from C. cretacea by having more closely spaced spiral
libs with slightly coarser ornament posterior to the Diagnosis: Afrollonia with rounded whorls, suture
periphery on the last whorl, and fewer spiral ribs but collared, spiral ribs moderatelywidelyspaced, umbilicus
with coarserornament on the base of the lastwhorl. rim weakly demarcated.
SuperfamilyTurbinoidea Rafinesque, 1815 Description: Shell size small (up to height 6 mm,
FamilyTurbinidae Rafinesque, 1815 diameter 6.5 mm, same specimen). Height slightly less
Subfamily Colloniinae Cossmanu in Cossmann and than shell diameter. Turbiniform. Phaneromphalous.
Peyrot, 1916 Spire moderately low, height approximately 28% ofshell
height. Pleural angle approximately 105°. Protoconch
Discussion: McLean and Kiel (2007) provided a unknown. Teleoconeh consisting of approximately four
review ol the systematic treatment of turbinoids and whorls. Suture impressed and rimed by thin, high collar
colloniines, including some reservations about recent on succeeding whorl. Whorls rounded. Ramp on last
molecular data (e.g., Williams and Ozawa, 2006) whorl concave. Sculpture on spire whorls consisting of
concerning these groups. Stemming from Cossmanns approximately three to four, narrow but widely spaced
early work, it has been recognized (e.g., Hickman and spiral threads with smooth, concave interspaces. Sculp-
McLean, 1990; McLean and Kiel, 2007) that opercular ture on last whorl consisting ofseveral thin, prominent,
information is important in dealing with colloniines. and widely spaced spiral ribs; approximately five spiral
Monari et al. (1996) pointed out, however, that in fossil ribs between suture and base on last whorl. Interspace
material, information aboutthe operculum is unavailable between collar and posteriormost spiral rib widest and
except in extremely exceptional cases, hence, it is nearly mostconcave. Base not clearlydemarcated from sides ol
impossible to base a useable paleontological classifica- last whorl. Sculpture on base consisting of seven spiral
tion on opercula. They argued that other morphological ribs, most being weaker than those on periphery but
shell characters can be used to distinguish members of becoming anteriorly stronger. Aperture circular. Outer
colloniines, which constitute a rather homogeneous and inner lips flared. Peristome continuous. Umbilicus
group in having a thick shell that is smooth or weakly semi-lunar. Rim of umbilicus subtle and demarcated
ornamentedwith spiralthreads. near inner lip by short but strong and noded spiral rib
GenusAfrollonia Adegoke, 1977 increasing in strength toward anterior end of aperture.
Periumbilical cord smooth, extendingshort distance into
Type Species: Afrollonia nigerensis Adegoke, 1977,by umbilicus on its left side. Columellarlip reflectedtoward
original designation; Paleocene, southwestern Nigeria. umbilicus adjacent to terminus of periumbilical cord.
Anterior end of columellar lip slightly expanded and
Description: Shell size small. Turbiniform. Phane- subangulatewhere intersectedbycarination ol umbilical
romphalous. Spire low to moderately high. Ramp broad. margin. Growth lines prosocline.
Protoconch small, smooth, and bulbous. Teleoconeh
sculpture consisting ol few line spiral ribs. Anterior end Holotype: LACMIP 13701, height 6 mm, diameter
ol columellar lip slightly expanded and subangulate 6.7 mm.
Page 199
R.L. Squires, 2011
Figures 18-30. Newcolloniines. Specimens coatedwith ammoniumchloride. 18-23.Afrolloniaelderensis newspecies, holotype
LACMIP 13701, LACMIP loc. 28777, height 6 mm, diameter 6.7 mm. 18. Apertural view. 19. Abapertural view. 20. Right-lateral
view. 21. Apical view. 22. Umbilical view. 23. Oblique umbilical view. 24-30. Antillocollonia bos new species 24, 25, 26, 27.
Holotype LACMIP 13702, LACMIP loc. 10742, height 6.5 mm, diameter 6,5 mm. 24. Apertural view. 25. Abapertural view.
26. Right-lateral view. 27. Apical view. 28. Faratype LACMIP 13703, Stewart’s (1946) Arroyo Pinoso, loc. 97, umbilical view,
diameter 7 mm. 29. Paratype LACMIP 13704, LACMIP loc. 10763, umbilical view, diameter5 mm. 30. Paratype LACMIP 13705,
LACMIP loc. 10742, obliqueumbilicalview, diameter5.8 mm.
Page 200 THE NAUTILUS, Vol. 125, No. 4
Type Locality: LACMIP 28777. below, is the earliest record of this genus and is also its
first record from the Pacific slope ofNorth America.
GeologicAge: Late Albian.
Antillocollonia bos new species
Distribution: Reworked Albian material in the (Figures 24-30)
Turonian Venado Sandstone, Elder Creek, Tehama
Diagnosis: Antillocollonia with umbilicus rim usually
County, northern California (Area4).
coincident with coarsely noded spiral cord, anteriornrost
Etymology: Named for its occurrence in Elder Creek two nodes strongest.
area, TehamaCounty, northern California.
Description: Shellsizeverysmall(uptoheight6.5mm,
Discussion: The newspecies isbasedon asingle spec- diameter 7 mm, same specimen). Height approximately
imen, which has goodpreservation. The exactlocation of same as shell diameter. Turbinate. Phaneromphalous.
the type locality of the new species is not known. It is a Spire moderately high, height approximately 20% ofshell
boulder from a conglomerate of earlyTuronian age, but, height. Pleural angle89°. Protoconchunknown. Teleconch
accordingto the LACMIPlocalityinformation, diefauna consistingofsixwhorls. Suture impressed. Whorls convex.
in theboulderis oflateAlbian age. Reworkedlate Albian Shoulder very narrow. Shell surface smooth; base of last
fossils in this same stratigraphic unit are known else- whorlcanhavefivetosix,veryfaint, flat, andwidelyspaced
where in the Cretaceous section ofnorthern Sacramento spiral bands with incised striae between them. Aperture
Valley, northern California (Matsumoto, 1960: 34-35; circular. Outer lip thin, innerlip thicker. Peristome contin-
Popenoe et ah, 1960: chart 10e; Squires and Saul, 2006). uous. Umbilicus narrow. Rim of umbilicus angulate and
The new species is most similar to Afrollonia usually demarcated by coarsely noded spiral rib, nodes
nigeriensis Adegolce (1977: 68-69, pi. II, figs. 10-15) commonly increasing in strength toward anterior end of
from Paleoeene rocks in southwest Nigeria but differs aperture; anteriormost node strongest; nodes on posterior
from Adegokes’ species by having a flatter ramp, last part of rim generally less well developed on adult spec-
whorl not ornamented by three prominent spiral ribs imens; spiral ribterminates atcolumellarlip. Periumbilical
with much finer spirals in between, base not angulate, cord prominent, smooth. Columellar lip thickest where
and umbilical rim notwell demarcated. intersected by periumbilical cord. Anterior end of col-
Kase (1984) reported Afrollonia matsushimensis Kase umellar lip slightly expanded and subangulate where
(1984: 60-61, pi. 6, figs. 5, 8-10) from upper Aptian to intersectedbycarinationofumbilicalmargin. Growth lines
prosoeline.
lowerAlbian stratain northeastern Japan. Ease’s species,
however, does nothave aperiumbilical ridge norathick- Holotype: LACMIP 13702, height 6.5 mm, diameter
ening of the columella where this ridge intersects the 6.5 mm.
columella; hence, his species does not belong in this
genus. Paratypes: LACMIP 13703-13705.
GenusAntillocollonia SoM, 1998 Type Locality: LACMIP 10742.
Type Species: Antillocollonia brujoensis Sold, 1998, GeologicAge: Turonian.
by original designation; late Campanian to
Maastrichtian, Puerto Rico. Distribution: LOWER TURONIAN: Redding For-
mation, Bellavista Sandstone Member, east of Redding,
mm
Description: Small size small (less than 10 high) Shasta County, northern California (Area 3). MIDDLE
but sturdy. Turbinate. Phaneromphalous. Teleoconch TURONIAN: Redding Formation, Frazier Siltstone
whorls smooth. Aperture circular. Peristome continuous. Member, east of Redding, Shasta County, northern
Periumbilical cord prominent and smooth. Columellar California (Area 3). TURONIAN (UNDIFFERENTI-
lip thickest where intersected by periumbilical cord. ATED): Panoche Formation, Arroyo Pinoso, ReefRidge
Anterior end of columellar lip slightly expanded and area, Fresno County, central California (Area 7).
subangulate where intersected bycarination of umbilical
margin. Exteriorof operculum pustulose, ridge, andwith Etymology: Named for its occurrence in Cow Creek
prominent central pit (Sold, 1998). Rim of umbilicus area east of Redding, Shasta County, northern Califor-
with orwithoutcrenulations. nia; bos, Latin, meaningcow.
Discussion: Antillocollonia is similar to Collonia Discussion: The examined material consisted of 52
M. E. Gray, 1850 but differs from the latter by having specimens. Preservation is good although the fragile
an auricular (earlike) projection high on the columella periumbilical cord is usually missing or incomplete.
and lackingbeads on the umbilical rim. Some specimens do not have nodes on the rim of the
Antillocollina has been reported before only from umbilicus.
upperCampanian to Maastrichtian strata in Puerto Rico The new species is remarkably similar to Antillo-
(Sold, 1998). Antillocollina bos new species, described collonia brujoensis Sold (1998: 47—48, pi. 3, figs. 17—22)
R.L. Squires, 2011 Page 201
from upperCampanian to Maastrichtian stratain Puerto Diagnosis: Tegula with three to four widely spaced,
Rico. The main difference is that the new species com- narrowspiral ribs on penultimate and lastwhorls.
monly has a coarsely noded spiral rib on the rim ot the
umbilicus. Description: Shell size medium (height 19 mm, diam-
The new species superficially resembles the trochid eter 19 mm, same specimen). Height approximately
Garromites nitidus Stephenson (1941: 262, pi. 47, figs. same as shell diameter. Turbinate. Phaneromphalous.
17-19) from the Naeatoch Sand, easternTexas. Stephen- Spire unknown. Suture impressed. Penultimate and last
son (1941) assigned this sand to the Maastrichtian, but whorls convexwith three to four narrow, prominent spi-
Akers and Akers (1997: fig. 2) assigned it to the upper ral ribs; widely and subequally spaced, with two
Campanian. Genus Garramites Stephenson, 1941,which anteriormost ribs slightly closer to each other. Base flat-
is monotypic, is characterized by a nearly smooth small tened, apparently smooth. Aperture circular. Peristome
shell having a wide umbilicus with an angulated, rather interrupted. Outer lip moderately thin. Inner lip with
coarselycrenulated rim. Withinthe umbilicus is a broad, single prominent tooth. Umbilicus small. Growth lines
shallow, spiral sulcus that closely rims the row of pro- prosoeline, tilted 43° fromvertical.
mG.inneinttiduscrbeynuhlaavtiionngs.a peArnituimcboillliocnaila cobrodsanddiffceorsmmofnrloym Holotype: LACMIP 13706, height 20.4 mm, diameter
20.7 mm.
having a beaded ridge that rims the umbilicus. In addi-
tion, A. bos does not possess a spiral sulcus that closely Type Locality: LACMIP 24123.
rims this beaded ridge.
The occurrence of the new species in the Panoche GeologicAge: Late Campanian.
Formation in Arroyo Pinoso of the Reef Ridge area,
Fersno County, central California is based on the Distribution: jalama Formation, Santa Barbara
author’s observation ofspecimens from Stewarts (1946: County, California (Area8).
88) locality97. Stewart noted that W. P. Popenoe identi-
fied the fauna from this locality as Turanian in age, and Etymology: The species is named for D.H. Dailey
Popenoeetal. (1960: 1521) reiteratedthisinterpretation. who worked on the molluscan fauna from the Jalama
Formation.
FamilyTurbinidae? Rafinesque, 1815
SubfamilyTegulinae Kuroda, Ilabe, and Oyama, 1971 Discussion: The newspecies is basedon asingle spec-
imen, which is crushed and missing its spire. It is most
Discussion: This subfamily was previously generally similar to the extant Tegula mariana (Dali, 1919: 359;
believed to be a trochid subfamily (e.g., Hickman and Keen, 1971: fig. 105), known mainly from the Gull oi
McLean, 1990), but, based on molecular studies of California, Mexico, but differs from Dalis species by
extant taxa by Williams et al. (2008), it has been provi- having a larger size, higher spire, and a more prominent
sionally assigned to theTurbinidae. columellartooth.
Genus Tegula Lesson, 835sensti Into The new species differs from Tegula jeanae Squires
1 and Saul (2005: 135-136, figs. 3-5), ofearly Campanian
Type Species: Tegula pellisserpertis (Wood, 1828), by age from northern California, by having sculpture, an
original designation; Recent,westcoastofCentral Amer- open umbilicus, more prominent columella tooth, no
ica to Gorgona Island, Colombia, South America (Keen, secondary denticles in the columella, and no raised lip
1971). along the basal edge of the interior of the last whorl.
Bandel and Stinnesbeck (2000) reported Tegula ovallei
Description: Shell size medium, solid. Globose to (Philippi, 1887) from Maastrichtian strata in central
conic. Phaneromphalous. Shells smooth to sculptured, Chile. The new species differs by not having numerous,
with sculpture consisting of broad, coarsely beaded spi- closely spaced and beaded spiral ribs. Kiel and Bandel
ral ribs. Base flattened. Peristome discontinuous. Ante- (2001) reported Tegula? simplex (Quintero and Revilla,
rior end ofcolumella with one or more teeth. Umbilicus 1966) from the Campanian (undifferentiated) strata of
ranging from open to closed. Interiornacreous. northern Spain. The new species differs by having a
much larger shell, an umbilicus, and an absence of nu-
Discussion: Based on reports by earlier workers merous, closelyspaced spiral ribs.
(Wenz, 1938; Keen, 1960), the geologic range of Tegula
is Miocene to Recent. Subsequently, other workers Subfamily Margaritinae Stoliczka, 1868
(Bandel and Stinnesbeck, 2000; Kiel and Bandel, 2001;
Discussion: This subfamily was previously generally
Squires and Saul, 2005) demonstrated that Tegula has a
Cretaceous record, and the earliest known species is believed to be a trochid subfamily (e.g., Hickman and
Tegulajeanae Squires and Saul, 2005 ofearlyCampanian McLean, 1990; Waren and Bouchet in Bouchet and
Rocroi, 2005), but, based on molecular studies ofextant
age in northern California.
taxa by Williams et al. (2008), it has been provisionally
Tegula daileyi new species assigned to the Turbinidae. According to Wiliams et al.
(Figures 31-33) (2009), Margaritinae is not monophyletic.
Page 202 THE NAUTILUS, Vol. 125, No. 4
... i
Figures 31-44. Newtegulineand newmargaritines. Specimens coatedwith ammonium chloride. 31-33. Teguline Tegulaclaileiji
new species, holotype LACMIP 13706, LACMIP loc. 24123, height 20.4 mm, diameter 20.7 mm. 31. Apertural view. 32. Right-
lateralview. 33. Umbilicalview. 34-37. PupiUaria encina newspecies, holotype SDSNH 11082, SDSNH loc. 152, height 11.7 mm,
diameter 8.6 mm. 34. Apertural view. 35. Abapertural view. 36. Apical view. 37. Umbilical view. 38-44. PupiUaria lomana new
species, holotype LACMIP 13707, LACMIP loc. 5571, height 12.2 mm, diameter9.6 mm. 38. AperturalMew. 39. Abaperturalview.
40. Right-lateral view. 41. Apical view. 42. Umbilical view. 43-44. Paratype LACMIP 13708, LACMIP loc. 5571, juvenile, height
6.8mm, diameter7mm. 43. Abaperturalview. 44. Left-lateralview.
Genus PupiUaria Dali, 1909 (1960), the geologic range of PupiUaria is Miocene to
Recent. The new species PupiUaria encina and
Type Species: Trochus pupillus Gould, 1849, by PupiUaria lomana, described below, extend the earliest
original designation; Recent, Bering Sea to southern record ofPupiUaria to the late Campanian.
California.
PupiUaria encina new species
Description: Shell size small to moderately small, (Figures 34-37)
thin. Turbiniform to ovate-conical. Phaneromphalous.
Spiral ribs raised but flattened with narrow interspaces. Calliomphalus? sp. Sundberg and lliney, 1984: table 1.
Peristome discontinuous. Columella smooth. Outer lip
unthickened. Umbilicus slit-like to nearly closed. Inte- Diagnosis: PupiUaria with ovate-conic shape and
rior nacreous. broad and prominent spiral ribs.
Discussion: Workers (e.g., Wenz, 1938; Palmer, 1958; Description: Shell size small (up to height 11.7 mm,
Keen, 1960) traditionally used PupiUaria as a subgenus diameter 8.6 mm, same specimen). Height approxi-
ol Margarites. The narrowness of the umbilicus of mately 1.3 times shell diameter. Ovate conical.
PupiUaria however, warrants that PupiUaria have Phaneromphalous. Spire high, approximately two-thirds
,
generic standing. According to Wenz (1938) and Keen ofshell height. Pleural angle 52°. Protoconch unknown.