The Polychaetous Annelids From Oil Platforms Areas In The Southeastern Gulf Of Mexico: Phyllodocidae, Glyceridae, Goniadidae, Hesionidae, And Pilargidae, With Description Of Ophioglycera Lyra, A New Species, And Comments On Goniada Distorta Moore And Scol

14 Pages·1997·7.8 MB·English

by  A Granadosbarba

1
PROCEEDINGS OF THE BIOLOGICAL SOCIETY OF WASHINGTON
110(3):457-470. 1997.
The polychaetous annelids from oil platforms areas in the
southeastern Gulf of Mexico: Phyllodocidae, Glyceridae, Goniadidae.
Hesionidae, and Pilargidae, with description of Ophioglycera lyra, a
new species, and comments on Goniada distorta Moore and
&
Scoloplos texana Maciolek Holland
Alejandro Granados-Barba and Vivianne Solis-Weiss
Laboratorio de Ecologia Costera (poliquetos), Instituto de Ciencias del Mar y Limnologfa,
UNAM
Apdo. Postal 70-305. Mexico, D.F., 04510, Mexico
—
Abstract. The distribution and composition of the polychaete families Phyl-
lodocidae, Glyceridae, Goniadidae, Hesionidae and Pilargidae of the oil plat-
forms area of Campeche Sound, southeastern Gulf of Mexico are analyzed.
They involve the identification of 14 species and the revision of some of the
&
material reported by authors in Uebelacker Johnson (1984) for these families.
Ophioglycera lyra, a new goniadid species is described, diagnosis of genus
Ophioglycera is emended. Goniada distorta Moore, 1903 is removed from
Ophioglycera and maintained in the genus Goniada. Ancistrosyllis sp. B of
A
Wolf, 1984 is reported as A. commensalis Gardiner, 1976, and Naineris sp.
&
of Taylor, 1984 is reported as Scoloplos texana Macioleck Holland, 1978.
Despite the fact that the Campeche Mexico by Uebelacker & Johnson (1984)
Sound, in the southeastern Gulf of Mexico, and deposited in the Smithsonian Institution
is the most important area of oil extraction (USNM) collection, since affinities with the
activity coupled with the most important study area environment were obvious. The
shrimp fishery zone in Mexico, its fauna is appropriate remarks are herein reported
A
poorly known. few years ago, regional where relevant.
—
surveys were undertaken under our direc- Study area. The study area is located in
tion to study the benthic fauna of the area Campeche Sound, between 18°46'-20°03'N
surrounding the offshore oil platforms. Part and 91°33'-92°34'W, covering the offshore
of the results of the extensive polychaete oil platforms area and part of the continen-
m
collections made during these studies are tal shelf down to about 200 depth (Fig.
presented here. Previous taxonomic reports 1). The sediment in the oil platforms area
on other polychaetes collected during these is mainly mud, although there are some iso-
studies include Granados-Barba (1994), lated patches of sandy mud (Granados-Bar-
&
Granados-Barba Solis-Weiss (1994), So- ba 1994).
—
ils-Weiss et al. (1994, 1995) and Granados- Materials and methods. Sampling was
Barba & Solis-Weiss (1997). done on board the R/V Justo Sierra, as part
When doubts arose over the taxonomic of the interdisciplinary projects IMCA-
—
DINAMO IMCA
position of several species, comparisons during expeditions
IMCA—
were made with material collected in the (1-1, March 1988), 2 (1-2, Septem-
IMCA—
northern and eastern continental shelves of ber 1988), 3 (1-3, March 1989),
DINAMO—
the Gulf of Mexico by different authors 1 (D-l, March 1990) and DIN-
AMO—
who collaborated in the Taxonomic Guide 2 (D-2 November 1990). Sixteen
of the Polychaetes of the Northern Gulf of stations are herein considered (Fig. 1). The
458 PROCEEDINGS OF THE BIOLOGICAL SOCIETY OF WASHINGTON
Fig. 1. Study area. 1 Sampling stations.
coordinates and depths of each station are sieve, and specimens fixed in 10% forma-
presented in Table 1. The polychaetes were lin. In the laboratory, specimens were
collected with a 0.1 m2 Smith-Mclntyre washed, sorted, and transferred to 70% eth-
grab. At each station, about 40 liters of sed- anol. Depth, salinity, and temperature were
iment were screened through a 0.5-mm recorded at each station with a Niels-Brown
C.T.D.
— For each species, selected synonyms,
Table 1. Positions (Latitude and Longitude) and
habitat and reported worldwide distribution
depths (m) of the sampling stations.
are included. Environmental factors mea-
Latitude Longitude sured in this and previous studies that are
Station (N) (W) Depth
included when available are cited with the
1 19°15' 92°08' 31.2 following abbreviations: D = depth (m); T
2 19°23' 92°21' 75.6 = temperature (°C); S = salinity (%); OM
3 19°18' 92°28' 102.6 = organic matter in the sediment (% of or-
4 19°15' 92°28' 71.8 ganic carbon) and OD = dissolved oxygen
5 19°05' 92°23' 32.6
6 18°49' 92°16' 16 (ml/1). The specimens are deposited in the
7 18°50' 92°06' 16 Polychaetological Collection of the Institu-
8 19°04' 91°42' 16.2 to de Ciencias del Mar y Limnologia
9 19°04' 91°33' 16.6 (CPICML), UNAM, Mexico, City. The
10 19°20' 91°39' 31.2
type material for Ophioglycera lyra is de-
11 19°20' 91°49' 32.4
12 19°33' 91°54' 56 posited in the following museums: National
13 19°42' 92°00' 70.2 Museum of Natural History, Smithsonian
14 19°43' 92°10' 98.2 Institution (USNM), Washington, D.C.; Los
15 19°52' 92°16' 148.4 Angeles County Museum of Natural His-
16 20°03' 92°09' 127.2 tory (LACMNH-AHF), California, USA.
VOLUME NUMBER
110, 3 459
Family Phyllodocidae Orsted, 1843 Genus Phyllodoce Lamarck, 1818
Phyllodoce {Phyllodoce) arenae
The family Phyllodocidae is represented Webster, 1879
by about 31 genera and 306 species. In this —
study, 1 1 specimens belonging to two gen- Phyllodoce (Anaitides) arenae. Pettibone,
era and four species were collected. Pleijel 1963:82, fig. 18a.—Day, 1973:23.—Gar-
diner, 1976:117, figs 8d.
(1991:232) clarified the authorship of the —
Phyllodoce arenae. Gathof, 1984:19.21,
family. See also Blake (1994a). —
figs. 19.18a-e. Granados-Barba, 1994:
112, pi. 15b. —
Genus Paranaitis Southern, 1914 Phyllodoce (Anaitides) panamensis. Day,
Paranaitis gardineri Perkins, 1984 1973:24, fig. 3n-p.—Gar—diner, 1976:117.
Phyllodoce panamensis. Granados-Bar-
Paranaitis gardineri Perkins, 1984:563, ba, 1994:114. (not Phyllodoce panamen-
—
figs. 4a-i. Granados-—Barba, 1994:112. sis Treadwell, 1917.)
—
Paranaitis polynoides. Gardiner, 1976:
Material examined. 4 specimens: Sep
110.—Gathof, 1984:19.21, fig. 19.18 [not 1988, sta. 13(1); Mar 1989, sta. 9(3). —
Anaitis polynoides Moore, 1909].
Material of other species examined.
— USNM
Phyllodoce panamensis 16831, Ho-
Material examined. 5 specimens: Mar
lotype from Port Chame, Panama, Sta. 362,
1989, sta. 5(1), 9(1), 11(1); Mar 1990, sta. USNM
30°11'48"N, 88°43'40"W. 51028, 2
16(1); Oct-—Nov 1990, sta. 16(1). specimens from Beaufort, North Carolina,
Remarks. Perkins (1984) erected the USA
34°24'N, 75°57'W, 80 m.
—
species P. gardineri to include specimens
Remarks. Day (1973) separated North
reported by Gardiner (1976) as P. polyno-
Carolina specimens he reported as P. pan-
ides separating Atlantic Ocean specimens
amensis from P. arenae based on the dif-
from P. polynoides Moore, 1909, based on
ference in color patterns of both species.
the fact that P. gardineri has dorsal cirri Whereas in the former there is a middorsal
narrower and shorter than the acicula that
continuous band, the latter is characterized
are not covering the dorsum in the posterior
by the presence of fusiform dark dorsal
region, in addition to the shape of the anal
spots in the intersegmental furrows. In one
cirri, which are long and filiform rather than of the specimens examined for this study, a
short, thick and cylindrical. The specimens middorsal continuous band is present, so
examined in this study agree with the de- that it was formerly identified as P. pana-
scription of P. gardineri. Perkins further re- mensis by one of us (Granados-Barba
marked that the North Carolina specimens 1994). However, a recent comparison be-
were twice as large as the ones from Flor- tween Day's specimens, the holotype of P.
ida. In this study, the specimens are about panamensis and our specimens showed that
half the size of the Florida spec—imens. P. panamensis Treadwell is considerably
Previously reported habitat. Intertidal larger than the specimens from the Gulf of
to 125 m, in mud, muddy sand, coarse to Mexico and North Carolina and that it does
fine sand, sand with gravel and shells, T = not have the middorsal band. We could con-
20-26; S = 36.—48-37.43; OM = 0.19-1.17. clude that both our specimens and Day's
Occurrence. In mud, D = 16—127; T = North Carolina specimens are P. arenae.
—
- OM =
20; S 36.48; 1.1—7. Previously reported habitat. Intertidal
Distribution in Mexico. Southern Gulf to 200 m, in mud, sandy mud, muddy sand
of Mexico. and coarse sand with shells, T = 27.5; S =
—
Distribution. North Carolina; Florida; 36.21-36.76; OM = 0.64-1.01; DO =
northern Gulf of Mexico. 3.45.
460 PROCEEDINGS OF THE BIOLOGICAL SOCIETY OF WASHINGTON
—
Occurrence. In mud, D = 16-70. Phyllodoce (Anaitides) mucosa Orsted,
—
Distribution in Mexico. Tamiahua La- 1843
goon, Veracruz; southern Gulf of Mexico. —
— Phyllodoce (Anaitides) mucosa. Pettibo-
Distribution. New England; North Car-
ne, 1963:81, fig. 18f.—Gardiner, 1976:
olina; northern Gulf of Mexico.
113, fig. 7. —
Anaitides mucosa. Gathof, 1984:19.33,
Phyllodoce (Anaitides) madeirensis fig. 19.28. —
Phyllodoce mucosa. Pleijel, 1991:259;
Langerhans, 1880 —
1993:51, figs. 33-34. Granados-Barba,
—
1994:114.
Phyllodoce (Anaitides) madeirensis. Day,
—
1973:23.—Gardiner, 1976:115, figs. 7q, Material examined. 1 specimen: Sep
8a-c. — 1988, sta. 15—(1).
Anaitides madeirensis. Gathof, 1984: Remarks. The examined specimen
19.39, figs. 34a-e. — agrees with description of Gatho—f (1984).
Phyllodoce madeirensis. Mountford, Previously reported habitat. Intertidal
1991:161, figs. 2-3a-c—Pleijel, 1991: to 425 m, in mud, sand, muddy sand, sand
257; 1993a:33.—Granados-Barba, 1994: and shells, and gravel, T = 13-15; S = 35-
OM = DO =
113. 35.46; —3-6.9; 0.8-3.09.
— Occurrence. In mud, D = 148; T = 21;
Material examined. 1 specimen: Mar S = 36.42; OM = 1.15. —
1990, sta. 13—(1). Distribution in Mexico. Baja Califor-
Remarks. The specimen examined nia; west of Baja California Sur; Gulf of
agrees with the redescription of Mountford California; Guerrero; southern Gulf of
(1991) of this species; the revision by this Mexico. —
author of some phyllodocids from Puerto Distribution. Northern Europe; Azores
Rico led to the synonymy ofP. oculata and Islands; western North America from Alas-
P. madeirensis, and the separation of P. er- ka to Mexico; western Africa; New En-
ythrophylla and P. madeirensis, based on gland; North Carolina; northern Gulf of
Mexico; Cuba.
color patterns. See also the list in Pleijel
(1991).
—
Family Glyceridae Grube, 1850
Previously reported habitat. Intertidal
to 200 m, on rocks and corals, in silt, clay, The family Glyceridae is represented by
mud, sandy mud, muddy sand, sand and three genera and about 80 species. For this
fine sand, T = 14-31; S = 34.44-37.4; OM study, we collected 15 specimens belonging
= DO =
0.18-5.5; — 1.03-5.4. to one genus and three species.
Occurrence. In mud, D = 70; OM =
1.47. — Genus Glycera Savigny in Lamarck, 1818
Distribution in Mexico. Southern Baja Glycera americana Leidy, 1855
California; Gulf of California; Jalisco; Co- —
Glycera americana. Pettibone, 1963:213,
lima; Guerrero; Gulf of Tehuantepec; Isla —
de Enmedio Veracruz; central and southern figs. 54a-e. Gardiner, 1976:161, figs.
171-n.—Gilbert, 1984a:32.15, fig.
regions of the Gulf of Mexico.
— 32.12.—Granados-Barba, 1994:152.—
Distribution. Cosmopolitan in intertidal
Hilbig, 1994a:200, fig. 6.1.
areas and continental shelves of tropical
—
seas; South Africa; pacific coast of Panama; Material examined. 7 specimens: Mar
North Carolina; northern Gulf of Mexico; 1988, sta. 7(1); Sep 1988, sta. 9(1), 14(1);
Puerto Rico. Mar 1989, sta. 6(2), 7(1), 9(1).
VOLUME NUMBER
110, 3 461
—
Remarks. Everted branchiae were ob- with gravel and shells, T = 27.5-28; S =
served from setiger 14, but we consider that 36.5-36.7; OM—= 0.59-1.6; DO = 3.9.
they could be retracted in anterior setigers. Occurrence. In mud, D = 16-75; OM
In very small specimens, the branchiae = 0.59-1.66.
—
could not be seen; however, all the other Distribution in Mexico. Gulf of Cali-
characters agree with description of G. fornia; southern Gulf of Mexico.
—
americana.
— Distribution. Central California to
Previously reported habitat. Intertidal, Mexico; New England; North Carolina;
continental shelf and slope, in mud, sandy northern Gulf of Mexico.
mud, muddy sand and fine to medium sand,
D = 22-106; T = 13-28; S = 35.06-37.19;
OM = OD =
0.47-3.9—; 1.04-5.4. Glycera tesselata Grube, 1863
Occurrence. In mud and muddy sand,
—
D = 16-98; T = 22-28; S = 35.51-37.19; Glycera tesselata. Hartman, 1950:77, pi.
OM =
0.39-1.05. — 10, fig. 11.—Granados-Barba, 1994:154,
Distribution in Mexico. Baja Califor- pi. 23a.—Hilbig, 1994a:208, fig. 6.5.
nia; west of Baja California Sur; Gulf of —
California; Veracruz; Tamiahua Lagoon, Material examined. 6 specimens: Sep
Veracruz; central and southern regions of 1988, sta. 2(2), 3(1), 15(1); Mar 1989, sta.
the Gulf of Mexi—co. 14(1); Oct-—Nov 1990, sta. 16(1).
Distribution. Magellan Strait, New Remarks. Glycera tesselata resembles
Zealand; Australia; Eastern Pacific Ocean, closely G. capitata, G. abranchiata, and
from southern Canada to Peru; Western At- Glycera sp. F of Gilbert (1984a), but differs
lantic Ocean from New England to Argen- from the first by the presence of bilobed,
tina; northern Gulf of Mexico; Bermuda. rather than entire postsetal lobes, from the
second by the presence of smooth instead
Glycera robusta Ehlers, 1868 of striated proboscidial papillae, and from
— the last by the presence of only one, rather
Glycera robusta. Hartman, 1950:69, pi. than two types of proboscideal papillae.
10, figs. 7-8.—Pettibone, 1963:218, figs. These species were compared to material of
54f-g.—Gardiner, 1976:162, fig. 17o.— both named species collected elsewhere.
—
Gilbert, 1984a:32.22, figs. 32.20a-L— Previously reported habitat. Continen-
Granados-Barba, 1994:153. tal shelf down to 97 m, in mud with gravel,
— coarse to fine sand, T = 13-25.8; S =
Material examined. 2 specimens: Mar 34.92-37.4; OM = 0.52-6.9; DO = 0.63-
1990, sta. 2(—1), 9(1).
5.4.
Remarks. In one of the specimens, six —
Occurrence. In mud, D = 75-148; T =
to seven long structures resembling bran- 19-24.5; S = 36.42-36.48; OM = 1.12-
chiae or cirri were observed on the first 10
1.33.
setigers (very similar in shape to those —
found among the cirratulids); they do not Distribution in Mexico. Baja California
follow a determined pattern, since some can Peninsula; Revillagigedo Islands; Sinaloa;
be seen emerging above or below the dorsal Gulf of Tehuantepec, Oaxaca; Tamiahua
cirrus, while others emerge from below the Lagoon, Veracruz; southern Gulf of Mexi-
ventral cirrus. Hilbig (pers. comm.) sug- co; Quintana Ro—o.
gests that these structures could be algae or Distribution. Mediterranean Sea; Red
fungi, or some other parasite/commensal. Sea; from England to Morocco; India; Ja-
—
Previously reported habitat. Intertidal pan; Canada; California; Atlantic coast of
to 380 m, in mud, sandy mud, sand, sand Panama; North Carolina.
462 PROCEEDINGS OF THE BIOLOGICAL SOCIETY OF WASHINGTON
Family Goniadidae Kinberg, 1866 guna de Tampamachoco, Veracruz; central
and southern regions of the Gulf ofMexico.
The family Goniadidae is represented by
nine genera (Hilbig, 1994) and about 75
Genus Ophioglycera Verrill, 1885,
species. In this study 14 specimens, in two
emended
genera and two species, were collected.
Type species: Ophioglycera gigantea
Genus Goniada Verrill, 1885.—
Audouin & Milne Edwards, 1833 Diagnosis. Body long, cylindrical; pro-
Goniada cf. maculata Orsted, 1843 stomium with 9 or 10 annulations and four
— antennae of equal length; no eyes. No chev-
Goniada maculata. Hartman, 1950:20, pi. rons on pharynx. Notosetae acicular; neu-
1, figs. 7-8.—Pettibone, 1963:225, fig. rosetae compound spinigers and lyrate setae
58.—Day 1973:51.—Gardiner, 1976:167,
can be present.
—
figs. 19c-f.—Gilbert, 1984b:33.11, fig. Remarks. This diagnosis includes the
33.8.—Granados-Barba, 1994:157.—Hil-
presence of lyrate setae first observed in
big, 1994b:226, fig. 7.5. Ophioglycera lyra; such setae had not pre-
—
Material examined. 2 specimens: Mar viously been reported in this genus.
1989 sta. 15(—1); Mar 1990 sta. 15(1).
Remarks. The specimens examined Ophioglycera lyra, new species
agree with description of Gilbert (1984b) Figs. 2-3
for this species. However Hartman (1950: —
Ophioglycera sp. A. Gilbert, 1984b:
20) recorded 39-41 setigers with unira-
33.19, figs. 33.16a-j; Granados-Barba,
mous parapodia (rather then 25). For this
1994:158.
reason the identity of the species must be —
considered doubtful. We think that speci- Material examined. 12 specimens: Mar
mens from the Gulf of Mexico could be a 1988 sta. 1(1), 7(1), 12(3); Sep 1988 sta.
new species, but we need to examine type 1(1); Mar 1990 sta. 1(1), 7(1), 11(1); Mar
specimens in order to confirm it. In some 1990 sta. 1(1), 7—(1), 10(1).
USNM
of the specimens, most of the body was Type locality. Sta. 10, holotype,
dark brown, but we think this could be the 175433, Gulf of Mexico, 10, 19°20.9'N,
result of fixation. One specimen had pairs 91°39.6'W, 13 Mar 1990. Paratypes: Sta. 1,
of ventrolateral black spots located in the 19°15.2'N, 92°08.3'W, 9 Mar 1988, (1)
USNM
intersegmental furrows from setigers 24-25 175434. Sta. 7, 18°50.1'N,
USNM
to the end of the fragment. — 92°06.2'W, 8 Mar 1988, (1) 175435.
Previously reported habitat. Intertidal Sta. 1, 19°15.2'N, 92°08.3'W, 25 Sep 1988,
USNM
to 3020 m, in silt, silty sand, clay, mud, (1) 175436. Sta. 1, 19°15.2'N,
sandy mud, muddy sand, sand with shells, 92°08.3'W, 12 Mar 1989, (1) LACM-AHF
medium to fine sands and sands, T = 16— POLY 1886. Sta. 7, 18°50.1'N, 92°06.2'W,
28; S = 35.3-37.6; OM = 0.18-0.96; DO 11 Mar 1989, (1) LACM-AHF POLY 1887.
= 1.14-3. — Sta. 11, 19°20'N, 91°49.8'W, 3 Mar 1989,
Occurrence. In mud, D = 148; OM = (1) CPICMLPOP-42-002. Sta. 6, 18°49.2'N,
1.18. — 92°16.2'W, 9 Mar 1990, (1) CPICMLPOP-
Distribution. Northern Japan; western 42-001. Sta. 12, 19°33.3'N, 91°54.7'W, 11
Europe; Alaska; South Africa; California, Mar 1988, (3) CPICMLPOP-42-003.
New England; North Carolina; northern Gulf of Mexico specimens identified as
A
Gulf of Mexico. — Ophioglycera sp. by Gilbert 1984b:
USNM
Distribution in Mexico. West of Baja 089828, southern Louisiana, Gulf
California Sur; Gulf of Tehuantepec; La- of Mexico, Sta. 03P, 28°40'02"N,
VOLUME NUMBER
110, 3 463
USNM
90°14'43"W. 089829, Texas, Gulfof three in middle region; thereafter two and
Mexico, Sta. S-52, 26°10'N, 97°01'W. — finally one much broader, diffuse band pres-
Material of other species examined. ent towards the end of body. Dorsal and
USNM
Goniada distorta Moore 1903, ventral cirri with dark pigmentation and en-
15720 Honshu Island, Japan, sta. 3739 tire notopodium pigmented on biramous se-
(moved to Ophioglycera by Hartman, 1950: tigers. Pigmentation in paratypes similar
36). Ophioglycera gigantea Verrill 1873, but less conspicuous, with smaller pig-
USNM
13417 syntype, Newport Harbor, mented areas and dorsolateral pigmentation
sta. 901, surfac—e, 1980. not in form of longitudinal bands.
Description. The description is based First parapodia with pair of dorsolateral
on the holotype unless specified otherwise. cirri and single presetal lobe. Single prese-
mm
Holotype a large specimen, 69 long tal lobe present either in first or in first and
mm
and 1.8 wide without parapodia, almost second parapodia in paratypes, apparently
complete, with 175 setigers. Paratypes and related to size; first two setigers of speci-
additional material incomplete with 45-117 mens from northern Gulf of Mexico having
mm mm
setigers, 9-29 long X 0.2-0.8 that single presetal lobe (Gilbert 1984b).
wide. Body long, cylindrical, tapering to- Thereafter, two digitiform slender presetal
wards posterior end, last 10 to 12 setigers lobes present, dorsal one longer, at first dis-
very small, crowded. Parapodia and part of tinctly so, then subequal. Postsetal lobes
dorsum pigmented giving appearance of shorter than presetal lobes, slender, digiti-
ophiuroid arm (Fig. 2h). Prostomium sem- form, broader at base, similar on all para-
iconical with ten annulations (Fig. 2a) (8- podia. Dorsal cirrus broad basally, pointed
10 in paratypes and additional material) distally, more rounded (bulbous) in unira-
four semiglobular antennae, distal pair dis- mous parapodia (Fig. 3a-b), more flattened
tinctly shorter. Basal ring of prostomium in biramous parapodia (Fig. 3c-d). Ventral
laterally expanded as small lappets, no eyes. cirri elongate, pointed distally, longer than
Pharynx without chevrons (Fig. 2a), very neuropodial lobes (Figs. 3a-b), becoming
mm mm
long (6.5 long, almost 2 wide on broader in transitional setigers, thereafter
holotype and somewhat damaged) covered tapering and pointed distally (Fig. 3c-d).
with papillae. Proboscidial papillae of two Two acicular notosetae and one acicula of
forms: triangular with large base and beak same width in notopodia (Fig. 3c). Neuro-
slightly recurved (Fig. 2b—d); and very podia with two acicula and compound spi-
small and rounded. Macrognaths (not visi- nigers (Fig. 3e-h) throughout the body; bi-
ble in holotype) with 3-5 teeth, microg- ramous parapodia with additional one to
naths 20-27 in dorsal arc, 7-8 in ventral four lyrate s—etae in upper position (Fig. 3i).
arc (Fig. 2e). First 65 setigers uniramous Remarks. Ophioglycera lyra, n. sp. dif-
(49-52 in paratypes, this character some- fers from related species by having bira-
what size related) with three transitional se- mous parapodia starting on setigers 49-65,
tigers (0-3 in paratypes), then biramous. two long acicular notosetae, and one to four
From setiger 65 two midventrally located superior lyrate neurosetae. This species is
black dots present close to intersegmental similar to O. gigantea from which it differs
furrows (Fig. 2f), in longitudinal midventral in being smaller, having a much larger num-
groove; dots and groove absent from last ber of uniramous setigers, and having a dif-
27-30 segments. ferent setal composition, particularly the ly-
Middle anterior region with two dorso- rate setae not previously reported for the
lateral pale bands (darker than the body col- genus.
or) subdivided maximally into 10 thin lon- Gilbert (1984b) stated that Ophioglycera
gitudinal bands (Fig. 2g); bands decreasing sp. A and G. distorta Moore, 1903 were
in number but increasing in width down to "most similar" because they had a similar
464 PROCEEDINGS OF THE BIOLOGICAL SOCIETY OF WASHINGTON
ww \jy
mm mm
1.0 1.0
Fig. 2. Ophioglycera lyra n. sp. a) Anterior end with everted proboscis; b—d) Proboscidial papillae; e) Distal
portion of the proboscis, dissected; f) Middle body (biramous parapodia) showing coloration patterns, ventral
view; g) Anterior setigers showing ventrolateral bands; h) Anterior setigers showing dorsal coloration patterns.
number of uniramous parapodia. However, cies has chevrons, and thus cannot be even
upon examination of the holotype of G. dis- maintained in the genus Ophioglycera,
torta (which is in good condition and an- which lacks them by definition. Those two
teriorly dissected) we found that this spe- species are therefore not comparable or
VOLUME NUMBER
110, 3 465
e I g h i
Fig. 3. Ophioglycera lyra n. sp. a) Uniramous parapodium from setiger 17, posterior view; b) Uniramous
parapodium from setiger 18, anterior view; c) Biramous parapodium from setiger74, posterior view; d) Biramous
parapodium from setiger 75, anterior view; e-h) Compound spinigers from setiger 18; i) Lyrate neuroseta from
setiger 74.
466 PROCEEDINGS OF THE BIOLOGICAL SOCIETY OF WASHINGTON
—
close. Hartman (1950:36) did not examine Occurrence. In mud and sandy mud, D
type material of Goniada distorta when = 16-32; T - 28; S = 36.94; OM = 0.59.
—
placing it in the genus Ophioglycera, prob- Distribution in Mexico. Gulf of Cali-
ably believing that if Moore 1903 did not fornia; Tamiahua Lagoon, Veracruz and
report chevrons for the species, they did not Terminos Lagoon, Campeche; southern
exist. After examination of the holotype, Gulf of Mexico.—
where the chevrons are clearly seen, we Distribution. North Carolina; Florida;
maintain Goniada distorta in the genus northern Gulf of Mexico.
Goniada as originally described by Moore.
—
Etymology. The specific name refers to Family Pilargidae Saint-Joseph, 1899
the lyrate setae of the new species, the first
to be reported in the genus. — The family Pilargidae is represented by
Previously reported habitat. 15-98 m, 10 to 13 genera (Blake 1994b) and about
in silt, mud, sa—nd, and silty sand. 56 species. In this study 25 specimens in
Occurrence. In mud, D = 16-56; T = three genera and four species were collect-
24-27; S = 35.94-37.19; OM = 0.68-1.65. ed.
—
Distribution in Mexico. Southern Gulf
of Mexico. Genus Ancistrosyllis Mcintosh, 1879
—
Distribution. Northern Gulf of Mexico. Ancistrosyllis commensalis Gardiner, 1976
Ancistrosyllis commensalis Gardiner, 1976:
Family Hesionidae Grube, 1850
123, figs. g-k.
The family Hesionidae is represented by Ancistrosyllis sp. B.—Wolf, 1984:29.17,
30 genera and about 150 species (Hilbig fig. 29.12.—Granados-Barba, 1994:137,
1994c). In this study six specimens in one pi. 20b.
genus and one species were collected. —
Material examined. specimen: Mar
1
Genus Podarkeopsis Laubier, 1961 1989 sta. 8(1). —
Podarkeopsis levifuscina Perkins, 1984 Additional material examined. Ancis-
USNM
trosyllis commensalis 052902, ho-
Podarkeopsis levifuscina Perkins, 1984:
lotype, Banks Channel, Wrightsville Beach,
575, fig. 10. — — North Carolina, USA, sta. 11. USNM
Gyptis vittata. Taylor, 1971:155. Day,
052903, paratypes, 3 specimens from Banks
&
1973:25 [not Webster Benedict, 1887].
— Channel Wrightsville Beach, North Caroli-
Gyptis brevipalpa. Gardiner, 1976:119,
na, USA, sta. 10, in burrows ofNotomastus
figs. 8q-t, 9a.—Uebelacker, 1984:28.27, USNM
lobatus. 86930, 1 specimen from
figs. 28.26a-e.—Granados-Barba, 1994: Texas, USA, sta. S49-6, as Ancistrosyllis
p1a34,Hapri.tm1a9nan--hSc[hnrootdeOrx,yd1r95o9m]u.s brevipal- sp. B Wolf,—1984.
— Remarks. The examination of the ho-
Material examined. 6 specimens: Mar lotype of A. commensalis and Wolf's
1989, sta. 11(1); Mar 1990 sta. 9(2); Oct- voucher material of Ancistrosyllis sp. A
Nov 1990 s—ta. 1(1), 9(2). from Texas and its comparison to our ma-
Remarks. The genera of hesionids are terial shows that all are indeed the same
currently being reviewed by Pleijel (Fau- species, the only difference being their size.
chald, pers. comm.) and the position of Specimens from North Carolina are larger
most species thus remains doub—tful. than those from the southern Gulf of Mex-
Previously reported habitat. 10-189 m, ico, which in turn are larger than those from
clay, mud, sandy mud and sand, T = 14.5- the northern Gulf of Mexico.
—
= OM = DO
28; S 35.45-37.22; 0.44-6.9; Previously reported habitat. Intertidal
= 3.09-3.17. to 30 m, commensal with Notomastus lob-