A new species of Processa from Bermuda (Crustacea: Decapoda: Caridea)

5 Pages·1991·1.9 MB·English

by  Raymond B Manning

PROC. BIOL. SOC. WASH.
104(2), 1991, pp. 317-321
A NEW SPECIES OF PROCESSA FROM BERMUDA
(CRUSTACEA: DECAPODA: CARIDEA)
Raymond B. Manning and C. W. Hart, Jr.
Abstract.—Processafamelica, the tenth western Atlantic species ofProcessa
tobe recognizedandthethird speciesto benamedfrom Bermuda, is described
from material collected at Hungry Bay, Bermuda. It can be distinguished from
allAmerican congeners byits elongate rostrum, which extends beyondthe eye.
Two species of Processa have been de- Diagnosis.—Kostnim extending beyond
scribedfromlocalitiesinBermuda,and,un- eyes. Antennal spine present. Stylocerite
til now, these were the only two species unarmed. Second pereopods asymmetrical:
knowntooccurthere.Processabermudensis larger right with 15-18 meral and 26-30
(Rankin, 1900)wasdescribedfrommaterial carpal articles, smaller left with 5-6 meral
collected in Harrington Sound and was re- and 13-15 carpalarticles. Carpusoffifthleg
describedfromBermudanmaterialbyGur- slightly longer than propodus. Abdominal
ney (1936:624). It subsequently has been stemites unarmed. Fifth abdominal somite
recorded from localities between North unarmedposterolaterally. Lobeonsixthab-
Carolina and Brazil (Manning & Chace dominal somite above articulation ofuro-
1971, Christoffersen 1979, Williams 1984). pod unarmed.
Processa wheeleriLebour, 1941, stillknown Description.-Kostnxm deflexed, extend-
only from the type material, was described ing beyond anterior edge ofeye; apex bifid,
from materialtakenwhilenightdredgingin lowertooth larger. Lower orbital angle low,
Ferry Reach. rounded.Antennalspinepresent. Loweran-
Thespeciesdescribedbelowwascollected terior angle ofcarapace broadly rounded.
in Hungry Bay in 1979 and 1980 during Abdomen smooth. Fifth abdominal so-
visits to Bermuda to study Bermudan cave mite rounded posterolaterally. Sixth ab-
shrimps, a project sponsored by the Smith- dominalsomiteaboutaslongasfifth,blunt-
sonianunderitsScholarlyStudiesProgram. ly angled posterolaterally; lateral plate of
All specimens are deposited in the Na- sixth abdominal somite unarmed.
tional Museum ofNatural History, Smith- Telson about 1.5 times longer than sixth
sonian Institution, Washington, D.C. abdominal somite, length about 3 times
(USNM). The abbreviation cl is used for greatest width, with 2 pairs ofdorsal and 2
postorbital carapace length. pairs ofdistal spines; anteriorpairofdorsal
spines set in anterior fourth, posterior pair
beyond midlength; distance between ante-
Processafamelica, new species
riormarginandanteriorpairofdorsal spines
Figs. 1-3
about V3 distance between pairs of dorsal
Material. —Hungry Bay, Bermuda spines; inner ofdistal spines stronger; apex
mm
[32°17'N, 64°46'W]: 1 S, cl 5.0 (holo- oftelson acutely pointed.
type, USNM 252202), 16 Nov 1979, leg. R. Eye moderately large, cornea width sub-
B. Manning.—1 S, cl 4.8 mm, 2 ovigerous equal to length of stalk and cornea com-
mm USNM
$, cl 5.8-7.0 (paratypes, bined, slightly more than 2 times greatest
252226), 13 May 1980, leg. R. B. Manning width ofantennal scale.
and C. W. Hart, Jr. Antennular peduncle extending beyond
318 PROCEEDINGSOFTHE BIOLOGICALSOCIETY OFWASHINGTON
Fig. 1. Processafamelica, new species, male, cl 5.0 mm, lateral view.
rostrum by distal 2 segments and about 'A ment about as long as penultimate, apex
of proximal segment, latter slightly longer acute; exopod well developed. Other
than distal segments combined; ultimate mouthpartsas figuredbyManning&Chace
segment more than halfas long as penulti- (1971) for species oiProcessa.
mate segment; proximal segment with ven- First pereopods not extending to end of
tral spine, set slightly beyond midlength. antennal scale. Right firstpereopodchelate;
Stylocerite obtusely rounded laterally, un- fingersabout%lengthofpalm;carpusshort-
armed, inner margin extending further an- erthanpalm; meruslongerthancarpus and
teriorly than outer. Dorsolateral flagellum chela combined. Left first pereopod with
ofantennule about halfas longas carapace; simple dactyl, about Vsaslongaspropodus;
ventromesial flagellum about twice as long carpus about % as long as propodus; merus
as carapace. as long as distal segments combined.
Antennal scale extending to or almost to Second pereopods unequal, right longer,
end ofantennular peduncle, length ofscale overreaching antennal scale with chela,
about 5 timesgreatestbreadth; broaddistal merocarpalarticulationnotextendingtoend
spine ofscale not overreaching blade. An- ofscale; ischiumwith 3-5 indistinct, merus
tennal peduncle extending about to middle with 15-18, andcarpuswith 26-30 articles;
ofsecond segment ofantennular peduncle. fingers more than halfas long as palm; car-
Basal segment of antenna lacking ventro- pus about 5 times as long as chela, merus 3
lateral spine. Antennal flagellum about 4 times as long as chela; ischium subequal to
times as long as carapace. merus. Left secondpereopod over-reaching
Third maxilliped overreaching antennal antennal scalewith part ofcarpusandall of
scalebyhalfofdistal segment; ultimateseg- chela, merocarpal articulation not extend-
VOLUME 104, NUMBER 2 319
Fig. 2. Processafamelica, new species, male, cl 5.0 mm: a, front, lateral view; b, front, dorsal view; c,
abdomen andtelson, lateral view; d, tail fan, dorsal view.
ing to cornea; ischium undivided, merus Fourth pereopod overreaching antennal
with 5-6 and carpus with 13-15 articles; scalewithdistalendofpropodusanddactyl;
fingers shorter than palm; carpus slightly dactyl slender, simple; propodus 2.5 times
more than 4 times as long as chela; merus as long as dactyl, unarmed; carpus more
3 times as long as chela; ischium about as than twice as long as propodus, unarmed;
long as merus. merus twice as long as propodus, with 5
Third pereopod overreaching antennal movable spines on outer surface; ischium
scalewithpartofcarpusandallofpropodus lessthan halfas longas merus, with 2 mov-
anddactyl;dactylslender, simple;propodus able spines; combined length ofcarpus and
about 3 times as long as dactyl, unarmed; propodus of fourth leg subequal to com-
carpus slightly more than twice as long as bined length ofischium and merus.
propodus, unarmed; merus about twice as Fifth pereopod overreaching antennal
long as propodus, about as long as carpus, scalewith propodusanddactyl; dactyl slen-
with 5 movable spines on outer surface; is- der, simple; propodus about 2.5 times as
chium about % as long as merus, with 2 long as dactyl, unarmed; carpus about 1.5
movable spines; combined length ofprop- times as longas propodus, unarmed; merus
odusandcarpusofthirdlegslightlylessthan slightly longer than propodus, unarmed; is-
length ofischium and merus. chium less than halfas long as merus, un-
320 PROCEEDINGSOFTHEBIOLOGICALSOCIETY OFWASHINGTON
Fig. 3. Processafamelica new species, male, cl 5.0 mm: a, antennular peduncle; b, antennal scale; c, third
maxilliped; d, left first pereopod; e, right first pereopod; f, left second pereopod; g, right second pereopod; h,
leftthird pereopod; i, leftfourth pereopod;j, left fifth pereopod; k, leftsecondpleopod.
armed; combined length of propodus and Size.—Carapacelengths ofmales4.8 and
carpus of fifth leg slightly less than com- 5.0 mm, ofovigerous females 5.8 and 7.0
bined length ofischium and merus. mm.
Abdominal stemites unarmed. Name.—ThQ specific name is from the
Outer margin of uropodal exopod ter- Latin,famelicus, hungry, alluding to its oc-
minating in triangular spine, with longer, currence in Hungry Bay.
slenderer mesial spine; suture distinct. En- Remarks.—Processa famelica is unique
dopod surface sparsely setose. amongwestern Atlantic species in having a
Ova small and numerous, eyed ova 0.4- rostrum that extends beyond the eyes. Al-
mm
0.6 in diameter. though similar to P. bermudensis and P.
VOLUME NUMBER
104, 2 321
wheeleri, this new species differs from the 1962), I.—Resultats Scientifiques des Cam-
formerinhavinganinternalspineandfrom pagnes de la Calypso 11:297-377.
thelatterinhavingthestyloceriteunarmed. Gumey, R. R. 1936. A. descripXion o^Processa ber-
mudensis Rankin and its larvae, IV. Notes on
Processafamelica resembles the eastern somedecapodCrustaceaofBermuda,IlI-lV.—
Atlantic P. elegantula Nouvel & Holthuis, ProceedingsoftheZoologicalSocietyofLondon
1957 in having the long rostrum extending (series B, part 1) 1936:621-630, pis. 1-7.
beyondtheeyesbutinthatspeciesthestylo- Lebour, M. V. 1941. Notes on thalassinid and pro-
ceriteisarmedwithastrongouterspineand cmeusdsiad.l—aArnvaneal(sCraunsdtaMceaagaDzeicnaepoodfaN)atfurroaml HBiesr--
the outer spine ofthe antennal scale over-
tory (series 11) 7:401-420.
reaches the blade. Manning, R. B. 1975. Two methods for collecting
Thisnewspecieswascollectedduringthe decapods in shallow water.—Crustaceana 29:
day on clean sand in shallow water, depth 317-319.
less than 0.5 meter, while sampling burrow ,&F.A.Chace,Jr. 1971. Shrimpsofthefam-
ily Processidae from the northwestern Atlantic
openings ofinfaunal organisms with a yab- Ocean (Crustacea: Decapoda: Caridea).—
by pump (Manning 1975). It was not taken SmithsonianContributionstoZoology89:1^1.
together with any other species, but it is Nouvel,H.,&L. B. Holthuis. 1957. LesProcessidae
likely that it, like the species ofAmbidexter (Crustacea Decapoda Natantia) des eaux euro-
reported by Abele (1972) and Williamson peennes.—ZoologischeVerhandelingen,Leiden
32:1-53, figs. 1-220.
(1980), lives in the burrow of another in- Rankin,W. M. 1900. TheCrustaceaoftheBermuda
vertebrate, eitheran annelidworm oracal- Islands, with notes on the collections made by
lianassid shrimp. the New York University Expeditions in 1897
Based on her work with larvae, Lebour and 1898.—Annalsofthe NewYorkAcademy
(1941:302) remarked that "There must be ofSciences 12(12):521-548, pi. 17.
Williams,A. B. 1984. Shrimps,lobstersandcrabsof
at least three, and probably four, species of the Atlantic coast ofthe eastern United States,
Processa in Bermudan waters," suggesting MainetoRorida.SmithsonianInstitutionPress,
that another species might exist there. Washington, xviii + 550 pp.
Williamson, D. I. 1980. Larval development in a
species ofAmbidexter Manning & Chace (De-
Literature Cited
capoda,Caridea,Processidae).—Crustaceana39:
Abele,L.G. 1972. AreviewofthegenusAmbidexter 235-246.
(Crustacea: Decapoda: Processidae) in Pana-
ma.—BulletinofMarineScience22(2):365-380. DepartmentofInvertebrateZoology,Na-
ChristofTersen, M. L. 1979. Decapod Crustacea: Al- tional Museum ofNatural History, Smith-
pheoida. Campagne de la Calypso au large des sonianInstitution,Washington, D.C. 20560.
cotesAtlantiquesdeTAmeriqueduSud(1961-