Revision of Laphystiopsidae (Crustacea: Amphipoda): new and old species from South China Sea, southeastern Australia, Falkland Islands and western Atlantic Ocean

24 Pages·1999·6.9 MB·English

Memoirs ofMuseum Victoria 57(2): 287-310 (1999)
REVISION OF LAPHYSTIOPSIDAE (CRUSTACEA: AMPHIPODA):
NEW AND OLD SPECIES FROM SOUTH CHINA SEA, SOUTHEASTERN
AUSTRALIA, FALKLAND ISLANDS AND WESTERN ATLANTIC OCEAN
L Barnard*
J.
National Museum ofNatural History, Smithsonian Institution, Washington, DC20560, USA
Abstract
Barnard, J.L.. 1999. Revision of Laphystiopsidae (Crustacea: Amphipoda): new and old
species from South China Sea, southeastern Australia, Falkland Islands and western Atlantic
Ocean. Memoirs ofMuseum Victoria 57: 287-310.
Collections from Bass Strait and eastern Tasmaniarevealtwonew species ofLaphystiopsis.
L. wuigi sp. nov., andL. zomerysis sp. nov. ofthe rarely encountered family Laphystiopsidae.
To verify differencesbetweenProlaphystiopsis andthetype ofthe family, Laphystiopsis, old
but unreported materials of Laphystiopsis planifrons Sars in the Smithsonian's National
Museum ofNatural History collections were reviewed and are presented herein. Prolaphys-
tiopsisp/atyceras, type ofthe genus, was borrowed and redescribed. Sars' (1895) and Schel-
lenberg's(1931)differentiation ofthegenerawasbasedon erroneousobservationsofthepalp
ofmaxilla 1. A review ofthe family is presented, with updating ofdiagnoses and literature.
Prolaphystiopsisdiffers from Laphystiopsisinthenarrowrostrum, bulginghead, and enlarged
and lobatearticle 1 ofantenna 1. Laphystiopsisplanifrons is newlyrecorded from the western
Atlantic Ocean. Laphystiopsis iridometrae Shoemaker. 1919 from the South China Sea is
reviewed and illustrated for the first lime. Prolaphystiopsis lutirostris Ledoyer, 1986 is
removedto Laphystiopsis. Individuals ofthe family are presumed to be inquiline parasites or
commensals of sessile marine invertebrates, particularly crinoids, but arc rarely noticed by
amphipodologists.
Introduction tiopsis necessitated reexamination of specimens
ofL. planifrons to verify the uniarticulate condi-
While examining amphipods from Bass Strait in tion of the palp on maxilla 1, and to search for
Museum Victoria, Jean Just discovered a speci- other generic differences. In this examination,
men of Laphystiopsidae, a family rarely col- L. planifrons was found to occur in the western
lected. Later [in 1990] I visited him and Gary Atlantic Ocean. Maxilla 1 palp proved to be 2-
Poore at Museum Victoria and continued sorting articulate despite the analysis of Sars (1895).
through similar collections and found one more Thus, the only known difference between Prola-
specimen from eastern Tasmania. The two speci- phystiopsis and Laphystiopsis evaporated. After
mens are reported on here as two new Australian examining the syntypes of Prolaphystiopsis
species. platyceras, type species of the genus, it was
The remarkable morphological resemblance of determined that the narrow rostrum, bulging
L. zomerysis sp. nov. and L. wulgi sp. nov. to the head, and enlargedand lobate article ofantenna
I
North Atlantic Laphystiopsis planifrons Sars, 1 are new characters that diagnose Prolaphys-
1895 in somatic aspect and the perfunctory tiopsis. Laphystiopsis ornitorhynchus Bulycheva
generic distinction (1- or 2-articulate palp of is transferred to Prolaphystiopsis.
maxilla 1) between Laphystiopsis and Prolaphys- Review of the scant literature of this family
revealed that Laphystiopsis iridometrae Shoe-
maker, 1919 from the "China Sea" had been only
* Jerry Laurens Barnard died on 16 August 1991
briefly described but never illustrated. The holo-
shortly aftercompletinga first draftofthis manuscript.
The editorthanks Elizabeth Harrison-Nelson for send- type deposited in Smithsonian collections pro-
ing the paper to the Memoirs ofMuseum Victoria as vided a detailed analysis of that species.
Jerry had intended. J.D. Thomas, J.K. Lowry, J. Just Although more than 20 juveniles were also pre-
and 1 made corrections and improvements to the origi- sent in the Smithsonian collections, only the
nal draftbut these have been slight. Gary C. B. Poore holotype was fully adult.
287
2XX I L, BARNARD
Species in Laphystiopsidae are assumed to lie Urosome slighlly flattened, urosomile I elongate
"parasites" on other organisms, much in the same or nol. Head Hal, rostrum large and spatulate [or
niannei ilia! I.al'ysliidae (Sars, 1X'>S; Bousfield, absent|; eyes present or absent; sides of head
l"X7) arc parasitic on fish. Indeed, L iridometrae bulging or not. Antenna I dominant, peduncle
was originally found by l>r Austin H. Clark short, llagellum elongate, article of Ilagellum
I
embedded in tissues of the crinoid Iridometra pubescent or nol or developed as a weak callyn-
iiirl/Htiiifiif ( liiihinictid (iilrcsliiic |A II. ( lark]) ophore; antenna 2 often as long as antenna I but
and given to Shoemaker who described it spar- oflesser thickness anil lesser dominance. Mouth-
ingly. II nol for the excellent work of Bousfield parts generally feebly armed. Upper lip broad,
(I9N7), in collecting and soliciting specimens of incised. Mandibular incisors ordinary, not attenu-
I.al'ysliidae Irom fish, very little would be known ate for piercing, toothed; palp well developed, 3-
of its presumed sister family. Because they have artieulate, very poorly setose, armaments mostly
been collected secondarily from Iheir hosts, scales. Inner lobes of lower lip fleshy and well
laphysliopsids appear in amphipod collections developed or absent. Inner plate of maxilla
I
only accidentally. Commensal amplnpods that small, ovale, with small seta ornone, outerplate
I
cling to ihe hosi initially en collection can be with J spines; palp 2-arlieulate (but see the dis-
easily lost dining routine curatorial activities, e.g., cussion of Proluphystiopsis ornitorhynchus
alcohol and/or container changes, for a more below). Plates of maxilla 2 narrow, inner setose
complete understanding of the group, active medially or not. Ma.xillipeds small, feebly armed,
searches should be undertaken focusing espe- plates ordinary except basal article ofouter plate
cially on sessile 01 slow moving invertebrates elongate; palp large or small. Coxae variable,
such as gorgonians and crinoids. short and evenly extending or middle coxae
Each species is diagnosed; the drawings form longer, occasionally coxae so small as to be dis-
the principal descriptive material; the descriptions junct, (inalhopods simple, carpi elongate. Perc-
for each are composed only ofcomments ampli- opods 5 7 increasingly elongate or not. article 2
fying Ihe drawings. Diagnoses and descriptions increasingly expanded, f.pimeron 2 dominant.
are not congruous among species. The diagnosis I'leopod 3 significantly shorter than pleopods
ofIhe family is based on new observations, nol all I 2. Uropods I and 3 exceeding uropod 2 (as far
ofwhich have been confirmed in all speciesofIhe as known), outer rami slighlly shortened or not;
family. Geographic codes listed in brackets for peduncle of uropod 3 scarcely elongate. Telson
each species taken from Haruard and karaman ovate.
(le1n9g9t1h).aLnedngwtidhtahndolwaindytharotficcloexoane aIrheeIpheercsoapmoedsa;s I arlahles. Proluphystius departs Irom the typical
ihe words deeper and broaderare nol appropriate. characterization in the total absence ofa rostrum,
Material is deposited in Museum Victoria. lack ofinner lobes on the lower lip, larger middle
Melbourne (NMV| and National Museum of coxae, excavate coxa 4, long carpus ofpereopod
Natural History, Smithsonian Institution, 3, lysianassid-like percopods 5 7, elongate tel-
Washington (USNM). son, and elongate urosomile I. Specimens ofthis
antarctic genus have not been observed; it may
Kiiphvstiopsidiic Siebbing, 1899 belong in another family. It keys out to the gener-
alized "melting pot" ofEusiridae but differs from
Diiiyjiosis. Rostrum present or absent, ifpresent that group in Ihe reduction ofspines on Ihe outer
well developed, reaching at least halfway along plateofmaxilla I to5 (versusgenerally 9 II), the
peduncular article ofantenna I. Accessory llagel- feeble palp ofihe maxilliped, (heelongated article
Iiiiii absent or uniarliculale. field of niouthparts on which Ihe outer plate of the maxilliped is
quadrangular. Mandibular molar scarcely Irilura- attached; Ihe reduction ofrakerspines to 1 (versus
tivc or nol, rakers absent or I raker present. Inner generally 5 I ), and the elongation ofurosomile I.
plate ofmaxilla I feeble,poorlysetose (! seta or Relationship. See Barnard and Karaman (1991)
naked), outer plate with 5 7 spines; palp large.
C-1oxarateiculIat-eI.smaPlall,p quoafdramtaexilolripaendlcro4-paorstliecruiloartley. OLfeoardfyicscotcimripodlaaircdi;aseoE;nussiSrwliiidtlahiepte(hdCeiadlaflcai;moipliiAiessdt.ayer,IipdPhaliecm;uesdliiCidodalacoe)-;;
rectangular or ovate, occasionally disjunct from
each other, (inalhopods 2 feeble, simple. Uro- masligidae; Maxilliphimediidae. The family
somitcs free. Uropod 3 1biramous, outer ramus differs from Lafystiidac in the 4-articulate (versus
longer lhan peduncle. fclson short, entire. 2-articulate) palp ofthe maxilliped, the reduction
ofspines on the outer plate ofmaxilla I from 7 to
Inscription. Body broad, depressed, weakly to 5, the presence of a molar, and well developed
strongly earinale on pleoniles 3 4 or I 3 only. palp on maxilla I, and except for Proluphystius.
.
REVISION OF IAPHYSTIOPS1DAE (AMI'IIIPOI)A) :si>
the presence of inner lobes on the lower lip, and Phoxocephalidae that have an elongate. Hat, spat-
the poorly developed and poorly setose ( I versus ulate rostrum, but Laphystiopsidae differ in the
2+ setae) inner plate ofmaxilla non-fossorial pereopods and antennae, and the
I
The Laphystiopsidae are similar to the Eusiri- large biramous uropod 3 lacking article 2 on the
dae, Calliopiidae and Pleustidae but with feeble, outer ramus (occasionally true in Phoxocephali-
simple gnathopods; feeble, and poorly setose dae, but only with short uropod 3), the small
maxillipedal palps. The lower lip of the type coxae, the weak antenna 2 and the uncleft telson.
genus is like the characteristic labium of Pleusti- The uniformity ofLaphystiopsidae is broken by
dae, and the inner lobes ofLaphystiopsisare large the loss of the rostrum in Prolaphysiius. That
and fleshy, whereas the inner lobes are lost in genus has a long urosomile as in Dulichiidae,
I
Prolaphystius. but otherwise has little similarity to that family.
Like the Lafystiidae, the Laphystiopsidae may The Laphystiopsidae are analagous to Maxil-
have some roots in Iphimediidae. Lafystiidae lipiidae in that both are inquilinous on sessile or
have an acuminate coxa 4 and otherwise are semi-sessile invertebrates. Maxdlipiidae occupy
similarto the Iphimediidae except for the reduced gorgonians (Thomas, 1996) while the Laphys-
palp on the maxilliped. The Laphystiopsidae are tiopsidae are definitely known from erinoids but
so diverse that they must be characterized indi- possibly also from coclenteratcs (collected in
vidually. Laphystiopsis and I'rolaphystiopsis fields ofLophelia in Norway). The two families
differ from Iphimediidae in the very short resemble each other in what may be superficially
nonacuminate coxae and flattened (though convergent characters as follows: similar coxal
strongly rostrate) head; Prolaphystius differs in shapes, bulging ocular regions, presence of cal-
the nonrostrate head and thin geniculate urosome. lynophore, feeble maxillae and maxillipeds. fee-
The Stilipedidae and Astyridae bear large outer ble gnathopods, huge oostegitcs, and weak telson
lobes on the maxillipeds and strongly dominant (except Prolaphystius). In contrast, the Maxdlipi-
carpi on the gnathopods. idae are characterized by an enormously elongate
All but one genus ofOedicerotidae have elon- pereopod 6, serrate spines on outer plate ofmax-
gate peduncles on uropod 3, anil that genus, illa I, thickened article 2 ofmaxilliped palp, elon-
Metoediceros, like otheroedicerotids, has slightly gate peduncle of uropod 3, unnotched upper lip,
or strongly subchelate gnathopods, a dispropor- and one orboth mandibles with 2 slenderrakers.
I
tionately elongate pereopod 7, strongly setose Ma.xillipiids are free-living on gorgonians where
pereopods, and unnotched upper lip. they gather in large numbers with their elongate
Corophioids have triturative molarsand usually sixth pereopods stretched outward laterally and
subchelate or strongly setose and specialized frequently rotating whereas the only known eco-
gnathopods. logical observation of laphysliopsids is that they
The Laphystiopsidae could be confused with make surficial burrows on erinoids.
Key to genera of Laphystiopsidae
Rostrum absent; coxa 4 almost as long as broad, deeply excavate posteriorly
Prolaphystius
Rostrum elongate, apex exceeding first peduncular segment; coxa 4 small,
much wider than long, not excavate posteriorly 2
Article ofantenna enlarged, lobate; rostrum apically constricted, margin
I 1
rounded; eye lobes strongly bulging I'rolaphystiopsis
Article ofantenna not enlarged or lobate, lacking apical projection; ros-
1 I
trum not constricted, truncate; eye lobes not bulging Laphystiopsis
Laphystiopsis Sais maxilla I uniarticulate. Coxae short, broad, ante-
riorcoxae ovate, often not touching serially, coxa
Laphystiopsis Sars, 1X95; 3X6. 4 much widerthan long, not excavate posteriorly.
Typespecies. Laphystiopsisplanifrons Sars, 1X95 Pereopods 3 4 alike, with carpus very short.
(monotypy). Pleonite 3 dorsally carinate but not forming hori-
zontal shelf, urosomite carinate and saddled.
Diagnosis. Rostrum well developed, very broad; 1
Telson short, oval.
ocular lobes not bulging. Article of antenna
I I
not grossly lobate. Mandibular molar conical, Description. Article I ofantenna I weakly cari-
unridged. Innerlobes oflower lip present. Palpof nate to strongly produced apically and massive.
—
.
290 ,1. L. BARNARD
Coxae produced forward or not. Articles 2-7 of L. wulgi sp. nov., eastern Tasmania, Australia
pereopod 3 like pereopod 4. Pleonites 3-4 [782]
cannate and pleonite 4 saddled, or only pleonites L. zomerysis sp. nov., eastern Bass Strait,
1-3 cannate. Australia, bathyal [782]
L. species "k", herein [254]
Includedspecies.
L iridomeirae (Shoemaker, 1919) Trans/erredspecies.
(Vader, 1978), near Hong Kong, inquilinous L. ornitorhynchus Bulycheva, 1952 to
Prolaphysliopsis.
[6521]
L. latiroslris Ledoyer, 1986, Geyser Bank, Distribution. Marine; South China Sea; boreal
Indian Ocean, abyssal [618A] North Atlantic, 167-900 m; northeast of Geyser
L. planifrons Sars, 1895 (Stephensen, 1926, Bank near Madagascar, Indian Ocean,
1931, 1938; Gurjanova, 1951), north boreal 2300-2500 m; and southeastern Australia,
Atlantic, sublittoral to bathyal [240 + B] 102-1000 m; often on crinoids or corals.
Key to species ofLaphystiopsis
1 Pleonite4 lackingdorsal process L. latiroslris
Pleonite4withdorsal process 2
2. Epimeron 2, posterovenlral cornertaincate L. zomerysis
Epimeron 2, posteroventral cornerrounded 3
3. Dorsal cuspsofpleonites3 4 pointed L. planifrons
Dorsal cusps ofpleonites 3-4 rounded 4
4. Rostrum reaching or exceeding second peduncular segment; ventral margin
ofcoxa4 even, broadly emarginate L. iridometrae
Rostrum barely reaching end offirst peduncular segment; ventral margin of
coxa 4 produced midventrally L. wulgi
Laphystiopsisplanifrons Sars Diagnosis. Head slightly longer than pereonites
Figures 3 1 3, scarcely bulging laterally (as seen from dor-
1 sal view); pleonites 1^4- each with conspicuous
Laphystiopsisplanifrons Sars, 1895: 386, pi. 135. dorsal bulge or carina; pleonite 4 not longer than
Norman, 1895: 488. Stubbing. 1906: 209.- pleonite 3; coxa 5, 50% as long as wide; coxa 6
Stephcnsen, 1926: 73; 1928: 185, fig. 36(6- 10); 1929: bilobed and wide anteroposteriorally (80% as
111099653,93::f1i4g18.3..25 (G1u5r6j);ano1v93a,hi1:925018:;49159,38fbig:.312832.. OOllddeevviigg,, 6wi0d+e%aassclooxnag a5sawnidde;16e0p%imeasrowni2deroausndceodxapo7s)-,
teroventrally; article 5 of pereopods 3-4, 1.5
Material examined, U.S. Fish Commission Lot 547, times as wide as long; article 2 of pereopod
which in written records (not on label) is: Gloucester 7 broadly pyriform. articles 3-7 together about
Fisheries Expedition, on schooner Proctor Brothers. 3 times as long as article 2 (from Sars. 1895;
Sable Island Bank off Nova Scotia, 7 Nov 1879, articles 5-7 absent on present material).
43°16'N, 60°35'W. 350 fm (writtenrecordsciteas 640
m), ['.'dredge], sample includes sea-anemone, pectens, Description offemale "p". See illustrations. Head
erinoid Acanthogorgia pimiata, and Alevonium multi- with apparent glandular tissue in place of eye.
J"lpo"ru8.m25anmdm)P.eiwata horcalis USNM 36124 (female Alonntgeenrnaethan1 barnotkeennnaapi2,callfylagbeultlupmrobwaitbhly 1n3o+t
U.S. Fish Commission Steamer AlbatWroWss,stn 2429, articles, callynophore with 6 groups of aes-
offNewfoundland, 42"55'30"N, 50°51 471 fm, thetascs, proximaltodistal =2rudimentary-2-5-4-
p2e3ra.tkiunre183885.,7°gFrayUmSuNdM, l3ar1g9e6b6e(ammalteraw"lo,"bo6t.t43ommtme)m.- 3-7, following articles 1-8 aesthetasc formula =
U.S. Fish Commission Albatross stn 2540, northwest- 2-3-3-3-0-3-0-2. Antenna 2 ordinary, flagellum
ern Atlantic Ocean, off Massachusetts, 39°58'20"N, 20-articulate. Callynophore articles without
70°52'00"W, 7 Aug 1885, 144 fm, large beam trawl, ridges besides insertion points for rows of aes-
green sand, bottom temperature 46.7°F (note in vial thetascs. Accessory flagellum very poorly devel-
reads: "many frags of crinoids were found in bottle oped. Ventral surfaceofarticle 1 onantenna 1 and
from which these specimens were taken C.R.Shoe- medioventral surfaces on articles 3^1 ofantenna
maker]") USNM 230425 (young male"m" 5.06 mm). 2 with sparse ridges, stiff setules, weak scales.
REVISION OF LAPHYSTIOPSIDAE (AMPHIPODA) 291
Figure 1. Laphystiopsis planifrons, unattributed figures = female "p" 8.25 mm; "o" = male "o" 6.43 mm.
Capital letters in figuresreferto parts; lowercase letterstoleftofcapital letters referto specimens andtothe
right refer to adjectives as follows: B, body; C, coxa; D, dactyl; E, epimeron; F, accessory flagellum;
G, gnathopod; H, head; L, labium; M, mandible; O, oostegite; P, pereopod; PL, pleopod; R, uropod;
T, telson; U, upper lip; V, palp; W, pleon; X, maxilla; Z, gill; d, dorsal; i, inner; m, medial; o, outer; r, right;
tleft.
292 .1. L. BARNARD
Figure 2. Laphystiopsisphinifions, female "p" 8.25 mm.
REVISION OF LAPHYSTIOPSIDAE (AMPHIPODA) 293
Figure 3. Laphystiopsisplanifrons, unattributed figures = female "p" 8.25 mm; "o" = male "o" 6.43 mm.
294 .1. L. BARNARD
One raker present on left mandible. Right laeinia bilobed and wide anteroposteriorally (more than
mobilis very transparent, with 3 teeth, in direct 90% as wide as coxa 5 and 135% as wide as coxa
view showing as column. Comb ofsetae on palp 7), 70+% as long as wide; epimcron 2 rounded
article 3 of complexity shown by Sars (1895). posteroventrally, corner rounded; article 5 of
Pleopods I 2 alike but pleopod 3 smaller, like pereopods 3-4 1-2 times as wide as long; article 2
pleopods of L. zomerysis; all inner rami with ofpereopod 7 broadly ovate, articles2-7 together
12 13 articles, outer with 13. Most spines of about equally as long as article 2.
uropods I 2 and setae of uropod 3 missing and Description ofholotype male "g" 4.55 mm. See
marked with pits. Cuticle with saw-tooth ridges
illustrations. Head with apparent glandular tissue
and denticles similar to L. zomerysis below.
Male "o". Like female but callynophorc twice in place ofeye. Leftantenna 1 broken apically but
as long, right mandibularpalp like female but left right one not longer than antenna 2, flagellum
with 15 articles, callynophore with 3 groups of3
with primary marginal setae absent, other scales
setae each, following articles 2-8 aesthetasc for-
present.
mula = 2-3, 2, 1-2, 0, ?, 0, l-?2 (damaged).
Illustrations. Pereopod 6 not enlarged, see body; Antenna 2 rather short and stunted on left side,
oostegile of pereopod 4 not enlarged, see body; but normal on right (see body illustration, with
drawing of antenna 2 reduced in relation to left antenna 2 replaced by right), flagellum 15-
antenna I; apices ofmaxillae badly eroded; max- articulate. Callynophore article without ridges
illipeds missing (see drawing taken from male besides insertion points for rows of aesthctascs.
"o"; most spines on uropod 3 broken. Accessory flagellum very poorly developed. Ven-
Relationship. Because this is the type species of tral surface of article 1 on antenna 1 and
the genus, it will serve as model for comparison mcdioventral surfaces on articles 3^4 ofantenna
ofthe other species. 2 with sparse ridges, stiff setules, weak scales.
Maxilliped, inner plate with 2 short marginal
tDhiestrSikbaugteironr.akNnoorrtthehawsatrdAtallaonntgicNogrewneergailalny cforaosmt oseuttaeer (p1lastteouwti)than3d m1arsgtoiuntal+s2etateh.inOanpeicaplossseitbalee,
and into Norwegian Sea, 50 900 m; here raker present on left mandible. Right laeinia
recorded for first time from northwestern Atlantic mobilis very transparent, with 4 teeth. Comb of
Ocean off Massachusetts, Newfoundland and setae on article 3 ofpalp much less complex than
Nova Scotia, 264 861 m. shown by Sars (1895) for Laphystiopsis plani-
Lapltystiopsis iridometrae Shoemaker frons and L. zomerysis to follow. Pleopods 1—2
alike but pleopod 3 smaller, drawingofpleopod 1
Figures 4 6 like pleopod 2, lengths of peduncle and rami of
Laphystiopsis iridometrae Shoemaker, 1919: uropod 3 shown; however, all inner rami with 10
245 246. Vader, 1978: 126 127 (discussion only). articles, outer with 1 1. Most spines of uropods
1-2 and setae of uropod 3 missing and marked
Material Holotype. U.S. fish Commission Albatross
stn 5310, South China Sea, near Ilong Kong, 21°.33'N, with pits. Cuticle with saw-tooth ridges and
I U^'LVF, 100 fin,4 Nov 1908. 12 fttannerbeamtrawl, denticles similarto L. zomerysis below.
sand, shell, bottom temperature 65.5°F, parasitic upon
crinoid tridometra tnelpomene A.M. Clark [= I. adres- Illustrations. Palp ofmandiblereduced in relation
linc A.M. Clark]. USNM 49599 (male "g" (newly to body ofmandible.
designated letter) 4.55 mm, with penial processes of
regularsize). Relationship. See L. wttlgi fordifferences. Differ-
neaOrthHeornmgateKroianlg.,Al2bIa°t3r3o'sNs.st1n1563°1151,'ES,ou8t8hfCmh,in4a SNeoav, sihnogrtfrsoetmoofthaerrticmleesmb3e-r7soonfptehreeogpeonduss5i-n7t.he very
b1a9g08,ocnoarIsreidsohemleltrsaand,me1l2pofmooetneta,nneUrSbNeaMmt4r9aw8l0,1mu(d3 Distribution. South China Sea near Hong Kong,
suhadults and 5 tinyjuveniles, including subadults "h" on crinoids; 161-183 m.
g3i.t1es1).mUmSaNnMd "4i9"6030.,15sammme;dlaatcakiansg49pe5n9e9s(a1ndsuboaodsutle-t Laphystiopsis zomerysis sp. nov.
and 13 liny juveniles).
Figures 7-9
Diagnosis. Head equally as long as pereonites
Materialexamined. Holotype. Australia, Victoria, S of
1-3, scarcely bulging laterally (as seen from dor- Point Hicks. 38°21.90'S, 149°20.00' E, 1000m. 23 Jul
sal view); pleonites 1 4 each with conspicuous 1986,WHOI epibenthicsled,G.C.B. Pooreetal.on RV
dorsal bulge or carina; pleonitc 4 not longer than Franklin (SLOPE stn 32), NMV J18521 (female "F
pleonite 3; coxa 5 60% as long as wide; coxa 6 4.60 mm).
REVISION OF LAPHYSTIOPSIDAK (AMPHIPODA) 295
Figure 4. Laphystiopsis iridometrae, unattributcd figures = holotype male "g" 4.55 mm; "i" - subadult "f
3.15 mm.
296 J. L. BARNARD
Figure 5. Laphystiopsis iridometrae, unattributed figures = holotype male "g" 4.55 mm; "i" = subadult "i"
3.15 mm.