2 New Species Of Neocallichirus From The Caribbean Sea (Crustacea, Decapoda, Callianassidae)

9 Pages·1993·4.1 MB·

by  R B Manning

PROC. BIOL. SOC. WASH.
106(1), 1993, pp. 106-114
TWO NEW SPECIES OF NEOCALLICHIRUS
FROM THE CARIBBEAN SEA
(CRUSTACEA: DECAPODA: CALLIANASSIDAE)
Raymond B. Manning
Abstract.—T^o new shore species of Neocallichirus similar to A^. grandi-
manus (Gibbes) are described, both differing from it in having a much longer
carpus on the major cheliped. Neocallichirus nickellae, new species, from To-
bago, has a distinctive triangular tooth on the cutting edge ofthe dactylus; the
basal tooth on the dactylus is rectangular in A^, lemaitrei, new species, from
A
Colombia. key to the western Atlantic species oiNeocallichirus is presented.
Continuing studies of American calli- posterior margin of the telson is rounded;
anassids (Manning & Heard 1986; Manning that margin may be slightly indented, but
1987, 1988, 1992; Manning &Felder 1986, never so much as to form distinct postero-
1991, 1992; Rodrigues & Manning 1992a, lateralangles onthetelson. The secondgroup
1992b) have revealed the existence of two comprises the two new species named here
new shore (sensu Briggs 1961) species of and A^. grandimanus and A^. rathbunae.
Neocallichirus from the Caribbean, de- In some of the species placed in Neocal-
&
scribed here. Their descriptions are accom- lichirus by Manning Felder (1991) the
panied by a key to the four western Atlantic propodus of Mxp3 is distally emarginate,
species oiNeocallichirus. The diagnosis giv- i.e., there is anindentation onthe opposable
en below for each species will distinguish it margin (see Fig. Id). This is shown by Ro-
from the other western Atlantic species of drigues (1971:fig. 67) for A^. guara and ap-
the genus. pears to be characteristic of both species
The western Atlantic species of Neocal- described here. The indentation is present
lichiruscanbedividedintotwogroupsbased in A^. trilobatus but is less well marked or
on the shape ofthe telson and the uropodal even absent in A^. grandimanus (see Biffar
endopod. In one group the uropodal en- 1971:fig. 5f, and Manning 1987:fig. 2e), A^.
dopod is longer than broad and tapers dis- rathbunae (see Manning & Heard 1986:fig.
tally, and the posterior margin ofthe telson lb), or A^. mirim (see Rodrigues 1971:fig.
is excavate, forming distinct posterolateral 84). It is shown by Rodrigues (1971:fig. 48)
angles. That group includes A^. guara (Ro- but not by Biffar (1971:fig. 9f) for A^. guas-
drigues, 1971), A^. guassutinga (Rodrigues, sutinga, although both figures suggest that
1971), A^. mirim (Rodrigues, 1971), and A^. the opposable margin is irregular in each of
trilobatus (Biffar, 1970). A new genus will those species.
&
be recognized for these species (Manning All of the types have been deposited in
Lemaitre 1993), and they will not be con- the collections of the National Museum of
sidered in the accounts of the new species Natural History, Smithsonian Institution,
given below. Washington, D.C. (USNM).
In the other group, which also includes Abbreviations include: Al (antennule or
thetype species,A^. horneriSakai, 1988, from first antenna), A2 (antenna or second an-
Australia, the uropodal endopod is broader tenna), cl (postorbital carapace length, in
m
than long and is flattened distally, and the mm), leg. (collector or collectedby), (me-
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Fig. 1. Neocallichirus lemaitrei, new species, female paratype, USNM 256875, cl 18.5 mm, Isla de Baru. a,
Carapace and frontal appendages, lateral view; b, Carapace and frontal appendages, dorsal view; c. Eye, lateral
view; d, Mxp3, inner surface; e. Major PI, outer surface; f, Minor PI, outer surface; g. Abdomen; h, sixth
abdominal somite, telson, and uropods, dorsal view.
ters), Man (mandible), Max1-2 (first and Family Callianassidae Dana, 1852
mm
secondmaxillae), (millimeters), Mxpl- Subfamily Callichirinae
3 (first to third maxillipeds), PI-5 (first to Manning & Felder, 1991
fifth pereopods), Pip1-5 (first to fifth pleo- Gqwus Neocallichirus Sdikdii, 1988
pods), tl (total length, measured on midline, Neocallichirus lemaitrei, new species
in mm). Figs. 1-3
The measurement following the number
of specimens is carapace length; in some Material—CoXombidi: Islas del Rosario
cases total length also is given. Segments of (10°10'N, 75°46'W), Isla del Rosario, beach
appendages are measured dorsally. on south side, yabby pump, 17 Jul 1988,
108 PROCEEDINGS OF THE BIOLOGICAL SOCIETY OF WASHINGTON
Fig. 2. Neocallichirus lemaitrei, new species, female paratype, cl 18.5 mm, USNM 256875, Isla de Baru. a,
Man; b, Maxl; c, Max2; d, Mxpl; e, Mxp2; f, P2; g, P3; h, P4; i, P5; j, Plp3.
USNM
leg. R. Lemaitre: 1 (5(1 1.6)(holotype, Front with 3 anterior projections, all ob-
256876). tuse, median falling well short of cornea,
Isla de Baru [10°10'N, 75°36'W], Aug laterals irregular, inconspicuous.
1986, yabby pump, leg. R. Lemaitre: 1 $ Eye with subterminal, hemispherical,
mm)
(11.7), 1 $ (18.5; tl 76 (paratypes, darkly-pigmented cornea, situated laterally
USNM
256875).-Isla de Barn, Cienaga de (pigment diffuse in some specimens); an-
Cholon, 0.5 m, yabby pump, 7 Aug 1988, terior margin ofeye with distomesial angled
leg. R. Lemaitre: 2 (5 (8.9, 10.5), 5 non-ovig- projection; eyes overreaching end of first
erous 9 (12.4, 15.7, 17.6, 18.1, 18.4), 2 ovi- segment ofAl peduncle.
gerous 9 (12.3, 15.4) (paratypes, USNM Al peduncle shorter than A2 peduncle,
256877). with penultimate segment subequal to ter-
Diagnosis.—CdiTdi^diCQ with 3 unarmed minal segment. A2 peduncle with penulti-
anterior projections, all obtuse. Mxp3 with mate segment longer than terminal seg-
length and height ofpropodus subequal; op- ment.
posable margin of propodus emarginate. Mxp3 with ischium-merus subpediform;
MajorPI with merus lackingventral spines, ischium with crista dentata on inner face;
carpus shorter than palm, both with ventral propodus with length and height subequal,
serrationsvisibleinouterview; dactyluswith opposable margin emarginate (ventral edge
large rectangular tooth basally and smaller also emarginate in 1 specimen). Other
triangular tooth distal to it on cutting edge. mouthparts as illustrated (Fig. 2a-e). PI un-
Minor PI with movable finger longer than equal and dissimilar. Major PI with dac-
palm. Uropodal exopod with dorsal plate tylus slightly shorterthanpalm, curvedven-
shorter than ventral plate. trally, tiphookingoverinnersurface offixed
Description.—CsiTSLpsiCQ lengths of adults finger; cutting edge of dactylus with en-
to more than 18 mm, total lengths to atleast larged rectangular tooth basally and smaller
76 mm. triangular tooth about midlength in both
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Fig. 3. Neocallichirus lemaitrei, new species, male paratype, USNM 256875, cl 11.7 mm, Isla de Bam. a,
Plpl; c, Plp2. Female paratype, USNM 256875, cl 18.5 mm. b, Plpl; d, Plp2.
sexes; cutting edge offixed finger with a few Uropodal exopodwith upper edge ofdor-
low teeth proximally as well as a line of sal plate, along its posterior margin, not as
denticles proximal to cutting edge, visible long as lower edge; endopod broader than
in outer view; palm length and height sub- long, wideningposteriorly, posteriormargin
equal, ventral margin serrated to base of flattened.
fixed finger, serrations visible in outer view; Remarks.—Neocallichirus lemaitrei dif-
%
carpus shorter than propodus but at least fers from A^. rathbunae in that the frontal
as long, higher than long, ventral margin projections of the carapace are unarmed,
%
with distal serrated, serrations visible in lacking apical spinules, and in having the
outerview; merus narrower and longer than dorsal plate ofthe uropodal exopod shorter
carpus, length about 1.5 times height, ven- than the ventral plate. Neocallichirus le-
tral margin evenly convex, serrated, lacking maitrei is very similar to A^. grandimanus
ventral spines. (Gibbes, 1850), the most common western
MinorPI with dactylus longerthan palm, Atlantic species of the genus; Biffar (1971:
curved ventrally, unarmed, tip crossing in- 666, under Callianassa branneri Rathbun,
ner side ofunarmed fixed finger (denticulate 1900, a subjective junior synonym of N.
in smaller specimens); gape hairy (omitted grandimanus) noted that A^. grandimanus
for clarity in Fig. If); palm slightly higher was a wide-ranging species, common on the
than long; carpuslongerthanpropodus, lon- intertidal flats ofsoutheastern Florida. Neo-
ger than high; merus narrower than but as callichirus lemaitrei diflers from A^. gran-
long as carpus, length less than twice height, dimanus in having a much longer carpus
smooth ventrally. and a slenderer dactylus on the major che-
Other pereopods as figured (Fig. 2f-i). liped; in A^. grandimanus the carpus is less
Pip1-3 as figured (Figs. 2j, 3). than halfas long as the palm, whereas it is
Telsonbroaderthanlong, subtrapezoidal, two-thirds as long in A^. lemaitrei. Further,
unarmed posteriorly, widest just posterior the ventral margin ofboth carpus and prop-
to base, posterior margin rounded, with at odus are strongly serrated ventrally in A^.
most a shallow median concavity. lemaitrei, with the serrations visible in outer
no PROCEEDINGS OF THE BIOLOGICAL SOCIETY OF WASHINGTON
Fig. 4. Neocallichirusnickellae, newspecies, maleholotype,USNM256879,cl 15.2mm,Tobago,a,Carapace
and frontal appendages, lateral view; b. Anteriorpart ofcarapace and frontal appendages, dorsal view; c, Mxp3,
inner surface; d, Major PI, outer surface; e. Minor PI, outer surface; f, Sixth abdominal somite, telson, and
uropods, dorsal view.
view, and the carpus ofthe minor cheHped collected the types and made his collections
(PI) is longer than the palm. In N. grandi- available for study, and who initiated stud-
manus the carpus and propodus appear ies on the callianassid fauna of the region
&
smooth ventrally in outer view and the car- (Lemaitre Rodrigues 1991).
pus ofthe minor PI is much longer than the
palm. This new species also differs from N.
Neocallichirus nickellae, new species
grandimanus in having the opposable mar-
Figs. 4-6
gin of the propodus of Mxp3 distinctly
emarginate; the ventral margin ofthe prop- Material. —Republic ofTrinidad and To-
odus also is emarginate in some specimens. bago: Coral Garden, Buccoo Reef(1 ri I'N,
All ofthe material ofthis species was col- 60°49'W), Tobago, 28 Jul 1989, leg. Lois
mm
lected in the Islas del Rosario, a coral reef Nickell: 2 d (14.1, 15.2) (smaller.5, tl 56
USNM
archipelago situated southwest of Cartage- is paratype, 256878; larger 6, tl 58
na, Colombia. Their location is shown by mm, is holotype, USNM 256879).
Werding(1982:fig. 1). Diagnosis.—C2ir2cp2iCQ with 3 unarmed
Etymology. —The species is named for my anterior projections, all low, obtuse. Mxp3
colleague and friend, Rafael Lemaitre, who with length and height of propodus sub-
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Fig. 5. Neocallichirusnickellae,newspecies,maleholotype,USNM256879,cl 15.2mm,Tobago,appendages.
a, Man; b, Maxl; c, Max2; d, Mxpl; e, Mxp2; f, P2; g, P3; h, P4; i, P5.
equal; opposable margin ofpropodus emar- propodus with length and height subequal,
ginate. Major PI with merus lackingventral opposable margin distinctly emarginate.
spines, carpus almost as long as palm, both Other mouthparts as illustrated (Fig. 5a-e).
with serrated ventral margins visible in out- PI unequal anddissimilar. MajorPI with
erview; dactylus with large, triangulartooth dactylus about as long as palm, curved ven-
basally on cutting edge. Minor PI with fin- trally, tiphookingoverinnersurface offixed
gers much longer than palm. Uropodal ex- finger; cutting edge of dactylus with large,
opod with dorsal plate shorter than ventral triangularbasal tooth and smallerlobe about
plate. midlength; cutting edge of fixed finger un-
Description. —CsLYSipsiCQ lengths of adults armed; palm slightly longer than high, ven-
14-15 mm; total lengths 56 and 58 mm. tral margin serrated to base of fixed finger,
Front with 3 anterior projections, all low serrations visible in outer view; carpus
and obtuse, median not extending to cor- shorter than propodus, slightly longer than
nea. high, ventral margin serrated, serrations
Eye with subterminal, hemispherical, visible in outer view; merus narrower than
darkly-pigmented cornea, situated laterally; but as long as carpus, length less than 2
anterior margin ofeye with distomesial an- times height, tapering distally, ventral mar-
gled projection; eyes falling short ofend of gin serrate, lacking ventral spines.
first segment ofAl peduncle. Minor PI with dactylus longerthan palm,
Al peduncle shorter than A2 peduncle, curved ventrally, unarmed but with a few
with penultimate segment about % as long denticles basally on cutting edge, tips cross-
as terminal segment. A2 peduncle with ter- ing inner side ofunarmed fixed finger; gape
minal segment about % as long as penulti- hairy (omitted for clarity in Fig. 4e); palm
mate segment. length and height subequal; carpus slightly
Mxp3 with ischium-merus subpediform; longer than palm, longer than high (height
ischium with crista dentata on inner face; equal to palm length), ventral margin
112 PROCEEDINGS OF THE BIOLOGICAL SOCIETY OF WASHINGTON
Fig. 6. Neocallichirus nickellae, new species, male holotype, USNM 256879, cl 15.2 mm, Tobago, a, Plpl;
b, Plp2; c, Plp3; d, Appendix interna ofPlp3.
smooth; merus narrower than but as long notchedandinhavingamuchlongercarpus
as carpus, length about twice height, ventral on the major cheliped; in A^. nickellae the
margin denticulate distally. carpus is almost as long as the palm, where-
Other pereopods as figured (Fig. 5f-i). as it is less than halfas long as the palm in
Pip1-3 as figured (Fig. 6). A^. grandimanus and two-thirds as long in
Telsonbroaderthanlong, subtrapezoidal, A^. lemaitrei. As in A^. lemaitrei, the carpus
unarmed posteriorly, widest just posterior and palm ofthe major cheliped are serrated
to base, posterior margin rounded, with at ventrally, and these serrations are visible in
most a shallow median concavity. outer view; the ventral surface ofthe carpus
Uropodal exopod with upper edge ofdor- andpalm ofA^. grandimanusappearsmooth
sal plate, along its posterior margin, not as in outer view. The major chela ofA^. nick-
long as lower edge. ellae differs from that ofboth A^. lemaitrei
Remarks.—Neocallichirus nickellae re- and A^. grandimanus in having a large, tri-
sembles A^. lemaitrei and differs fi*om A^. angulartooth on the cutting edge ofthe dac-
grandimanus in having the opposable mar- tylus. Finally, A^. nickellae differs from A^.
gin of the propodus of Mxp3 indented or rathbunae in lacking sharp frontal projec-
.
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106, 1 113
tions and in having the dorsal plate of the thank Ms. Lois Nickell, University Marine
uropodal endopod shorter than the ventral Biological Station, Millport, Scotland, and
plate. my Smithsonian colleague Rafael Lemaitre
The western Atlantic species of Neocal- for allowing me to work with material col-
lichirus can be distinguished as follows: lected by them. The figures were prepared
my
by wife Lilly.
Key to Western Atlantic Species of
Neocallichirus Literature Cited
1 Frontalprojectionseacharmedwith Biffar, T. A. 1970. Three new species ofcallianassid
spinule. Upperplate ofuropodal ex- shrimp (Decapoda, Thalassinidea) from the
opod as long as lower plate. Merus westernAtlantic.—ProceedingsoftheBiological
Society ofWashington 83(3):35-49.
of major PI with erect spines on
1971. Thegenus Callianassa(Crustacea, De-
.
ventral margin
capoda, Thalassinidea) in south Florida, with
A^. rathbunae i^chmiXX, 1935); southern keys to the western Atlantic species.—Bulletin
Florida and Caribbean (Biffar ofMarine Science 21(3):637-715.
1971, Manning & Heard 1986) Briggs, J. C. 1961. The East Pacific Barrier and the
—
- Frontal projections lacking anterior distribution ofmarine shore fishes. Evolution
15(4):545-554.
spinule. Upperplate ofuropodal ex- Dana, J. D. 1852. Macroura. Conspectus Crustaceo-
opod shorter than lower plate. Me- rum &. Conspectus ofthe Crustacea ofthe Ex-
rus ofmajor PI lacking erect spines ploring Expedition under Capt. C. Wilkes,
on ventral margin 2 U.S.N.—Proceedings of the Academy of Nat-
ural Sciences ofPhiladelphia 6:10-28.
2. Carpus ofmajor PI less than halfas Gibbes, L. R. 1850. Onthecarcinologicalcollections
long as propodus. Opposable mar- ofthe United States, and an enumeration ofthe
gin ofMxp3 propodus usually lack- species contained in them, with notes on the
ing notch or indentation most remarkable, and descriptions ofnew spe-
A^. grandimanus (Gibbes, 1850); cies.—ProceedingsoftheAmericanAssociation
for the Advancement of Science, 3rd meeting:
Bermuda, southern Florida and
167-201.
Caribbean to Brazil (Biffar 1971). Lemaitre, R., & S. de A. Rodrigues. 1991. Lepidoph-
- Carpus ofmajor PI more than half thalmussinuensis: anewspeciesofghostshrimp
as long as propodus. Opposable (Decapoda: Thalassinidea: Callianassidae) of
margin of Mxp3 propodus with importance to the commercial culture of pe-
naeid shrimps on the Caribbean coast of Co-
notch or indentation 3
lombia, with observations on its ecology-Fish-
3. Dactylus ofmajor PI with large, tri- ery Bulletin, U.S. 89(4):623-630.
angular tooth basally on cutting edge Manning, R. B. 1987. Noteson westernAtlanticCal-
.... A^. nickellae, new species; Tobago lianassidae (Crustacea: Decapoda: Thalassinid-
- Dactylus of major cheliped with ea).—Proceedings of the Biological Society of
Washington 100:386^01.
large, rectangular tooth basally on
. 1988. T\\Q ^X2iXviS of Callianassa hartmeyeri
cutting edge
Schmitt, 1935, with the description of CoralIi-
A^. lemaitrei, new species; Caribbean anassa xutha from the west coast of America
. .
coast of Colombia (Crustacea, Decapoda. Thalassinidae).—Pro-
ceedingsoftheBiologicalSocietyofWashington
101:883-889.
Acknowledgments
1992. A new genus for Corallianassa xutha
.
Studies of American callianassids have Manning (Crustacea: Decapoda: Callianassi-
dae).—Proceedings ofthe Biological Society of
been supported by the Smithsonian Field
Washington 105:571-574.
Station at Link Port, Rorida. This is con- . & D. L. Felder. 1986. The status ofthe cal-
tribution number 297 from that station. I lianassid genus Callichirus Stimpson, 1866
114 PROCEEDINGS OF THE BIOLOGICAL SOCIETY OF WASHINGTON
(Crustacea: Decapoda: Thalassinidea).—Pro- , & R. B. Manning. 1992a. Two new calli-
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99:437-443. oda: Thalassinidea).—Proceedings of the Bio-
&
1991. Revision ofthe American logical Society ofWashington 105:324-330.
, . &
Callianassidae (Crustacea: Decapoda: Thalas- , . i992b. Poti gaucho, a new genus
sinidea).—Proceedingsofthe Biological Society and species ofghost shrimpfrom southern Bra-
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,
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