http://www.jstor.org Records of Shallow-Water Marine Isopods from Bermuda with Descriptions of Four New Species Author(s): Brian Kensley Source: Journal of Crustacean Biology, Vol. 14, No. 2, (May, 1994), pp. 319-336 Published by: The Crustacean Society Stable URL: http://www.jstor.org/stable/1548912 Accessed: 25/07/2008 14:24 Your use of the JSTOR archive indicates your acceptance of JSTOR's Terms and Conditions of Use, available at http://www.jstor.org/page/info/about/policies/terms.jsp. JSTOR's Terms and Conditions of Use provides, in part, that unless you have obtained prior permission, you may not download an entire issue of a journal or multiple copies of articles, and you may use content in the JSTOR archive only for your personal, non-commercial use. Please contact the publisher regarding any further use of this work. Publisher contact information may be obtained at http://www.jstor.org/action/showPublisher?publisherCode=crustsoc. Each copy of any part of a JSTOR transmission must contain the same copyright notice that appears on the screen or printed page of such transmission. JSTOR is a not-for-profit organization founded in 1995 to build trusted digital archives for scholarship. We work with the scholarly community to preserve their work and the materials they rely upon, and to build a common research platform that promotes the discovery and use of these resources. For more information about JSTOR, please contact support@jstor.org. JOURNAL OF CRUSTACEAN BIOLOGY, 14(2): 319-336, 1994 RECORDS OF SHALLOW-WATER MARINE ISOPODS FROM BERMUDA WITH DESCRIPTIONS OF FOUR NEW SPECIES Brian Kensley ABSTRACT An extensive collection of marine isopods from the Peabody Museum, Yale University, taken from 114 collecting stations on Bermuda, is reported. The collection adds 10 new records to the list of known Bermudan isopods, including two undescribed species, Mesanthura bermu- densis and Joeropsis nigricapitis. These two species can be recognized initially by their distinctive pigment patterns. Fresh material shows Anthomuda stenotelson Schultz to be a junior synonym of Anthelura affinis Richardson. Also included in the report are the descriptions of two new species collected from a cave, Munnogonium somersensis and Stenobermuda iliffei. The latter, which exhibits protogynous hermaphroditism, is shown to be a member of the Gnathostene- troididae. While several reports on the isopod fauna of Bermuda have been published (Richard- son, 1902; Schultz, 1986; Kensley and Schotte, 1989), the collection of about 1,500 marine and littoral specimens reported here from the Peabody Museum, Yale Univer- sity, includes 23 species and is probably the most comprehensive collection yet made. The isopods were collected from the inter- tidal to about 10-m depth, from a variety of habitats including algal clumps and turfs, turtle grass beds, sponges, rocks, coral rub- ble and coarse sediments, and mangrove roots. The current list of 60 isopod species known from Bermuda (Table 1, including for completeness the terrestrial oniscideans and the parasitic epicarideans) contains 10 new records, five of which have a Caribbean distribution. Of the remaining five, one wood-boring species, Limnoria multipunc- tata Menzies, has a widespread marine dis- tribution; four species were previously un- described. This list cannot be considered as complete, given that single specimens of an unidentifiable munnid, arcturid, and gna- thiid are present in the Peabody collection. Further, no records of interstitial isopods are known, probably because no attempt has been made to collect them. Overall, how- ever, the Bermudan marine isopod fauna continues to be primarily tropical/subtrop- ical Caribbean in its affinities, while its 30% endemism (14 of 46 marine species), pre- sumably developed since the last Pleisto- cene glaciation, emphasizes its relative iso- lation. Of the marine forms, the genus Carpias appears to be ecologically the most wide- spread, occurring in 86 of the 114 collection stations (see Table 1). One species, Carpias minutus (Richardson), is represented at 40 of these stations. Included in this report are descriptions of two new species collected from Bermudan caves by Dr. Thomas Iliffe of Texas A&M University, and deposited in the National Museum of Natural History (USNM), Smithsonian Institution. Holotypes from the Yale collection are deposited in the Peabody Museum, Yale University (YPM), along with the rest of the collection which is cat- alogued in a block commencing with cata- logue number YPM 9551; where available, paratypes were deposited in the Smithson- ian Institution and the Bermuda Biological Station (BBS). SYSTEMATICS Family Antheluridae Poore and Lew Ton, 1988 Anthomuda affinis (Richardson, 1902) Fig. 1 Anthelura affinis Richardson, 1902: 288, pi. 28, figs. 29-32. Ananthura affinis: Schultz, 1969: 101, fig. 137. Anthomuda affinis: Poore and Lew Ton, 1988: 500. Anthomuda stenotelson Schultz, 1979: 909, figs. 12- 21.-Poore and Lew Ton, 1988: 500.-Kensley and Schotte, 1989: 23, 270, fig. 7A. Material Examined.-Holotype of A. affinis, YPM 3349, nonovigerous 9 total length (tl) 5.0 mm, Ber- muda, collector A. E. Verrill, 1901.-Holotype of A. stenotelson, USNM 171263, nonovigerous Q tl 8.0 mm, paratype USNM 171264, nonovigerous 9 tl 7.9 mm, 319 JOURNAL OF CRUSTACEAN BIOLOGY, VOL. 14, NO. 2, 1994 Table 1. Isopod records from Bermuda. ! stygobiont. + endemic form. * new record. Suborder Anthuridea Amakusanthura magnifica (Menzies and Frankenberg, 1966) + Anthelura affinis (Richardson, 1902) + Apanthura harringtoniensis Wigele, 1981 + Colanthura tenuis Richardson, 1902 ? + Curassanthura bermudensis Wigele, 1985 * Kupellonura imswe (Kensley, 1982) + * Mesanthura bermudensis, new species Paranthura infundibulata Richardson, 1902 Pendanthura tanaiformis Menzies and Glynn, 1968 Suborder Asellota + Atlantasellus cavernicolus Sket, 1979 + * Carpias algicola (Miller, 1941) Carpias bermudensis Richardson, 1902 + Carpias minutus (Richardson, 1902) * Carpias serricaudus Menzies and Glynn, 1968 Joeropsis rathbunae Richardson, 1902 + * Joeropsis nigricapitis, new species + * Munnogonium somersensis, new species * Santia milleri (Menzies and Glynn, 1968) Stenetrium stebbingi Richardson, 1902 + Stenobermuda acutirostrata Schultz, 1979 + * Stenobermuda iliffei, new species Suborder Epicaridea Bopyrissa wolffi Markham, 1978 Cancricepon choprae (Nierstrasz and Bren- der a Brandis, 1925) Leidya bimini Pearse, 1951 Parathelges piriformis Markham, 1972 Parathelges tumidipes Markham, 1972 Pseudione affinis (Sars, 1882) Probopyrinella latreuticola (Gissler, 1882) + Stegias clibanarii Richardson, 1904 Synsynella choprae (Pearse, 1932) Synsynella deformans Hay, 1917 Suborder Flabellifera Alcirona krebsi Hansen, 1890 + Arubolana aruboides (Bowman and Iliffe, 1983) Colopisthus parvus Richardson, 1902 Cymothoa oestrum (Linnaeus, 1793) Dynamenella perforata (Moore, 1901) Eurydice personata Kensley, 1987 * Excirolana mayana (Ives, 1891) Excorallana quadricornus (Hansen, 1890) * Limnoria multipunctata Menzies, 1957 Limnoria tuberculata Sowinsky, 1884 Lironeca reniformis Menzies and Franken- berg, 1966 Nerocila acuminata Schioedte and Mei- nert, 1881 Paracerceis caudata (Say, 1818) Suborder Valvifera Idotea balthica (Pallas, 1772) Idotea metallica Bosc, 1802 Table 1. Continued. Suborder Oniscidea Agabiformius lentus (Budde-Lund, 1885) Armadillidium vulgare (Latreille, 1840) Armadilloniscus ellipticus (Harger, 1878) Halophiloscia couchi (Kinahan, 1858) Leptotrichus panzeri (Audouin, 1826) Ligia baudiniana H. Milne Edwards, 1840 Porcellio laevis Latreille, 1804 Porcellio lamellatus Budde-Lund, 1885 Porcellio scaber Latreille, 1804 Porcellionides pruinosus (Brandt, 1833) Porcellionides sexfasciatus (Koch, 1847) Stenoniscus pleonalis Aubert and Dollfus, 1890 Tylos latreillei Audouin, 1825 Tylos niveus Budde-Lund, 1885 off Castle Roads, Bermuda, 9.0 m.-Peabody locality 123, North Rock, 9 m, 1 nonovigerous Q tl 5.0 mm. Remarks. -Poore and Lew Ton (1988) not- ed that Anthelura affinis and Anthomuda stenotelson appeared to be very similar, and were perhaps synonymous. Examination of the type material of both species confirms this synonymy. The pereiopods and uropo- dal rami, previously poorly illustrated, are figured here, as is the most recently collected nonovigerous female, to show the dorsal pigmentation. Family Anthuridae Leach, 1814 Mesanthura bermudensis, new species Figs. 2, 3 Material Examined. -Holotype, YPM 9553, 6 6.8 mm, Peabody locality 20, Shelly Bay, in subtidal algae, col- lector M. F. Gable, 3 Jun 1985.-Paratype, YPM 9554, 6 5.6 mm, Peabody locality 45, Whalebone Bay, rocky intertidal, collector M. F. Gable, 24 May 1987.-Para- type, YPM 9555, nonovigerous Q 6.2 mm, Peabody locality 47, promontory off Shelly Bay, algal clumps, collector M. F. Gable, 28 May 1987. -Paratype, YPM 9556, manca 2.6 mm, Peabody locality 73, cove west of Bermuda Biological Station, Ferry Reach, turtle and manatee grass and sediment, collector A. J. Baldinger, 29 May 1987.-Paratype, YPM 9557, 6 4.6 mm, Pea- body locality 74, Evans Bay, algal scrapings from pier, collector E. A. Lazo-Wasem, 30 May 1987.-Paratype, YPM 9558, manca 2.7 mm, Peabody locality 105, North Rock, red algae, collector A. J. Baldinger, 2 Jun 1987.- Paratypes, YPM 9559, nonovigerous Q 3.2 mm, manca 2.33 mm, Peabody locality 196, cove west of Devon- shire Bay, washings from rocks, midtide level, collector E. A. Lazo-Wasem, 15 Jun 1988.-Paratype, BBS, S 4.4 mm, Peabody locality 61, cove west of Bermuda Biological Station, Ferry Reach, bed of Thalassia, col- lector A. J. Baldinger, 29 May 1987.-Paratype, USNM 243585, 8 5.4 mm, Peabody locality 99, Shark Hole, 320 KENSLEY: MARINE ISOPODS FROM BERMUDA G Fig. 1. Anthomuda affinis: A, habitus nonovigerous 9 PMY locality 123. Paratype of A. stenotelson, USNM 171264: B, maxilliped; C, pereiopod 1; D, pereiopod 2; E, pereiopod 4; F, uropodal exopod; G, uropodal protopod and endopod; H, pereiopod 7. Harrington Sound, subtidal encrusted rocks, collector Description. -Nonovigerous female: Body E. A. Lazo-Wasem, 1 Jun 1987.-Paratype, USNM proportions C<1<2=3=4=5=6 243586, nonovigerous e 4.9 mm, Peabody locality 46, C < 1 Harrington Sound, attached wall community, collector > = P Cephalon th moderate rostral M. F. Gable, 25 May 1987. point; anterolateral eyes strongly pigment- 321 JOURNAL OF CRUSTACEAN BIOLOGY, VOL. 14, NO. 2, 1994 ed. Telson posteriorly rounded, having transparent marginal flange, with 6 pairs of apical setae. Antennular peduncle with basal article broader and slightly longer than 2 distal ar- ticles together; flagellum of 3 articles, ter- minal article bearing 4 aesthetascs. Anten- nal flagellum consisting of 4 setose articles. Mandibular palp, article 3 with 6 distal spines, subapical spine longest; incisor with 3 sclerotized cusps; lamina dentata having 5 teeth; molar truncate, barely sclerotized. Maxilla having 6 distal spines. Maxilliped with basal article of palp slightly shorter than article 2; terminal article with mesial mar- gin truncate, bearing 3 fringed setae. Pe- reiopod 1, carpus posterodistally rounded; propodal palm with transparent rounded lobe at about midpoint; unguis about equal in length to rest ofdactylus, with small spine at base. Pereiopod 2, carpus triangular, lacking free anterior margin; propodus with strong posterodistal spine, fringed scales along posterior margin; unguis half length of rest ofdactylus. Pereiopod 7, carpus with short spine on posterior margin, latter lon- ger than free anterior margin; propodus with posterodistal fringed scales and strong spine; unguis less than half length of rest of dac- tylus. Pleopod 1, endopod parallel-sided, about 6 times longer than wide, with 10 distal plumose setae; exopod about 3.5 times wider than endopod, widest at midlength. Uropodal exopod almost twice longer than wide, apically acute, with broad subapical notch, bearing numerous marginal setae; endopod broadly rounded, one-fifth longer than basal width, bearing numerous mar- ginal setae. Color pattern: cephalon with broad pigment patch between eyes and reaching posteriorly three-fourths length of segment; pereionites 1-7 each with roughly rectangular dorsal patch of pigment falling well short of posterior margin, those of pe- reionites 2-5 with clear oval area on mid- line; pleon with pigment patch anteriorly lobed, and with short anterolateral pigment lines; telson with rectangular pigment patch falling well short of posterior margin; small patch of pigment on uropodal endopod and exopod. Male: Body proportions, C < 1 < 2 > 3 =4 < 5 > 6 > 7