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First Record of Janicea antiguensis (Chace, 1972) from the Cape Verde Islands and in the Eastern Atlantic (Decapoda, Caridea, Hippolytidae) Author(s): Cédric d'udekem d'acoz Reviewed work(s): Source:

1 First Record of Janicea antiguensis (Chace, 1972) from the Cape Verde Islands and in the Eastern Atlantic (Decapoda, Caridea, Hippolytidae) Author(s): Cédric d'udekem d'acoz Reviewed work(s): Source: Crustaceana, Vol. 73, No. 9 (Nov., 2000), pp Published by: BRILL Stable URL: Accessed: 11/01/ :33 Your use of the JSTOR archive indicates your acceptance of the Terms & Conditions of Use, available at. JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact support@jstor.org. BRILL is collaborating with JSTOR to digitize, preserve and extend access to Crustaceana.

2 FIRST RECORD OF JANICEA ANTIGUENSIS (CHACE, 1972) FROM THE CAPE VERDE ISLANDS AND IN THE EASTERN ATLANTIC (DECAPODA, CARIDEA, HIPPOLYTIDAE) BY C?DRIC D'UDEKEM D'ACOZ1) Avenue du bois des collines 34, B-1420 Braine-l'Alleud, Belgium During SCUBA diving investigations in the Cape Verde Islands, Prof. Dr. Peter Wirtz (Department of Oceanography and Fisheries, University of the Azores) observed several individuals of a shrimp unknown to him. He collected two specimens of this species, which he sent to the present author. It soon appeared that they belong to the genus Janicea Manning & Hart, 1984, and that they also look quite similar to its type and only known species, Janicea antiguensis (Chace, 1972). This shrimp was previously considered to be restricted to the warm parts of the northwestern Atlantic (Chace, 1972; Manning & Hart, 1984). In order to verify the identity of the Cape Verde Janicea, I have compared them with American /. antiguensis kindly provided by Dr. Rafael Lemaitre (Smithsonian Institution, Washington, D.C.). The Janicea material examined by me consists of the following specimens or collections: Janicea antiguensis (Chace, 1972) (fig. 1)? Eastern Atlantic. Cape Verde Islands, S?o Tiago island, Tarrafal, coarse shell sand bottom between large rocks, m depth, night collecting, P. Wirtz coll., February 2000: 1 male, collection Institut Royal des Sciences Naturelles de Belgique/Koninklijk Belgisch Instituut voor Natuurwetenschappen, Brussels (IRScNB/KBIN). Same locality, small cave 7 m depth, night collecting, P. Wirtz coll., February 2000: 1 ovigerous female, collection IRScNB/KBIN.? Western Atlantic. Bermuda, south of Coopers island, in a cave hole, m depth, J. Clark coll., sample 3F , 14/ix/1981: 2 males and 1 ovigerous female, collection USNM Bahamas, Grand Bahama, Cemetary Cave, M. F. Brooks and R. B. Manning coll., sample 3 M , 03/iii/1987: 3 males and 1 ovigerous female, collection USNM Gulf of Mexico, Mexico, Cueve Quebrada, Chankanaab park, Cozumel, Quintana Roo, Ol/iv/1988: 2 females, collection USNM ovigerous [) Research Associate at the Institut Royal des Sciences Naturelles de Belgique, Brussels; be.packardbell. org? Koninklijke Brill NV, Leiden, 2000 Crustaceana 73 (9):

3 1164 NOTES AND NEWS no A careful comparison of Janicea from the eastern and western Atlantic revealed significant differences between them. So, I consider the Cape Verde Janicea as belonging to J. antiguensis. The habitat of the shrimps from both sides of the At lantic is also similar: shallow-water bottoms with rocks, and, especially, semi-dark caves. In fig. 1,1 give illustrations of the anterior part of the two Cape Verde specimens, as well as a drawing of the tip of the sixth pleonite, a structure which, so far, had never been drawn at a larger scale. Prof. Wirtz provided me also with colour slides of the Cape Verde /. antiguensis, photographed in situ during night dives. So, it is possible to give some information on its nocturnal colour pattern, which has never been described so far. Shrimps more or less transparent. C?phalothorax, antennulae, antennae, scapho cerites, and third maxillipeds usually strongly tinged with red. Some specimens are less strongly pigmented, with a transparent c?phalothorax and white inner anten nular flagella. Pleon transparent with a red transverse stripe on the posterior part Fig. 1. Janicea antiguensis (Chace, 1972), Cape Verde Islands, S?o Tiago island, Tarrafal. A, male; B, C, ovigerous female. A, B, anterior part of body; C, posterolateral part of sixth pleonite.

NOTES AND NEWS 1165 of each segment; a longitudinal red line runs all along its ventral side; a shorter, inner dorsal red line arises posteriorly from the visceral mass.

4 NOTES AND NEWS 1165 of each segment; a longitudinal red line runs all along its ventral side; a shorter, inner dorsal red line arises posteriorly from the visceral mass. Tail fan slightly to strongly tinged with red. Third to fifth pereiopods usually with red merus, and white carpus and propodus; however, in some specimens these appendages are en tirely white. The occurrence of Janicea antiguensis in the eastern Atlantic is interesting, but not totally unexpected, since there are several other warm-water coastal shrimps that were already known to be Amphi-atlantic: Cinethorhynchus rigens (Gordon, 1936), Gnathophyllum americanum Gu?rin-M?neville, 1855, Tuleario caris neglecta Chace, 1969, Lysmata grabhami (Gordon, 1935), Thor amboinen sis (De Man, 1888), Latreutes fucorum (J. C. Fabricius, 1798) (see d'udekem d'acoz, 1999); L. parvulus (Stimpson, 1866) (see Holthuis, 1951); Alpheus bou vieri A. Milne-Edwards, 1878, Alpheus cristulifrons Rathbun, 1900, A. cylindricus Kingsley, 1878, A. floridanus Kingsley, 1878, A. intrinsecus (Bate, 1888), A. mal leator Dana, 1852, A. paracrinitus Miers, 1881, Automate evermanni Rathbun, 1902, Metalpheus rostratipes Pocock, 1890 (see Crosnier & Forest, 1966; Chace, 1972); Pontonia manningi Fransen, 2000 (see Fransen, 2000). There are different explanations possible for the amphi-atlantism of these species. For Latreutes fucorum, the situation is quite evident: since it lives not only in coastal benthic habitats but also on pelagic Sargassum, adults may easily cross the Atlantic by means of their algal raft. For the other species, the situation is not clear. In most cases, transport by ships via hull fouling or via ballast waters seems unlikely, since none of these species has the type-profile of an invading alien species, i.e., a species with both a tolerance for harsh habitats like polluted harbours and a wide ecological niche. However, in the precise case of /. antiguensis, this explanation cannot be totally ruled out, since it may be found in harbour habitats and is possibly of recent occurence in its type locality (Chace, 1972). Some species may have very long larval stages or the possibility to increase the length of their larval development when drifted by the currents in oceanic waters. In this context, it should be pointed out that the eggs of Janicea antiguensis and Cinetorhynchus rigens examined by me are very small, a characteristic which suggests a long larval development. Others may have a very slow evolutionary rate and have remained unchanged or nearly unchanged during the opening of the Atlantic basin, i.e., when the distance between both sides of the Atlantic Ocean became too large to allow larval transport any longer. Finally, it is possible that, in some cases, the amphi-atlantism is apparent only and we are actually dealing with a pair of vicariant cryptic or sibling species.

5 1166 NOTES AND NEWS ACKNOWLEDGEMENTS I would like to sincerely thank Prof. Dr. Peter Wirtz for the opportunity to study the Cape Verde Janicea, and Dr. Rafael Lemaitre for the loan of western Atlantic specimens. REFERENCES Chace, F. A., Jr., The shrimps of the Smithsonian Bredin Caribbean Expeditions with a summary of the West Indian shallow-water species (Crustacea: Decapoda: Natantia). Smithson. Contrib. Zool., 98: i-x, Crosnier, A. & J. Forest, Crustac?s D?capodes: Alpheidae. R?s. scient. Camp. Calypso XX VIL-Campagne dans le Golfe de Guin?e et aux?les Principe, Sao Tom? et Annobon (1956) et campagne aux Iles du Cap-Vert (1959) 19. Ann. Inst, oc?anogr., Paris, 44: Fransen, C. H. J. M., Pontonia manningi, new species, a bivalve-associated shrimp from the tropical and subtropical Atlantic (Decapoda: Pontoniinae). Journ. Crust. Biol., 20 (spec. nr. 2): Holthuis, L. B., The caridean Crustacea of tropical West Africa. Atlantide Report, 2: Manning, R. B. & C. W. Hart, Jr., The status of the hippolytid shrimp genera Barbouria and Ligur (Crustacea: Decapoda): a r??valuation. Proc. biol. Soc. Washington, 97 (3): Udekem d'acoz, C. d', Inventaire et distribution des crustac?s d?capodes de l'atlantique nord-oriental, de la M?diterran?e et des eaux continentales adjacentes au nord de 25?N. Collection Patrimoines Naturels, 40: i-x, (Mus?um National d'histoire Naturelle, Service du Patrimoine Naturel, Paris). First received 23 June Final version accepted 27 June 2000.

ON LYSMATA GRABHAMI (GORDON), A WIDELY DISTRIBUTED TROPICAL HIPPOLYTID SHRIMP (DECAPODA, CARIDEA)

ON LYSMATA GRABHAMI (GORDON), A WIDELY DISTRIBUTED TROPICAL HIPPOLYTID SHRIMP (DECAPODA, CARIDEA) 107 1973. (with T. E. CHUA). Remarkable schooling behaviour of a water flea, Moina sp. (Cladocera). Crustaceana, 24: 332, 333. 1973. Notes on some species of the genus Macrobrachium (Crustacea: Decapoda: