Observations on the Kalliapseudid Tanaidacea (Crustacea: Malacostraca: Peracarida) from the Northwestern Atlantic, with an Illustrated Key to the Species

Gulf and Caribbean Research Volume 22 | Issue 1 2010 Observations on the Kalliapseudid Tanaidacea (Crustacea: Malacostraca: Peracarida) from the Northwestern Atlantic, with an Illustrated Key to the Species David T. Drumm University of Southern Mississippi Richard W. Heard University of Southern Mississippi, DOI: 10.18785/gcr.2201.04 Follow this and additional works at: http://aquila.usm.edu/gcr Part of the Marine Biology Commons Recommended Citation Drumm, D. T. and R. W. Heard. 2010. Observations on the Kalliapseudid Tanaidacea (Crustacea: Malacostraca: Peracarida) from the Northwestern Atlantic, with an Illustrated Key to the Species. Gulf and Caribbean Research 22 (1): 29-41. Retrieved from http://aquila.usm.edu/gcr/vol22/iss1/4 This Article is brought to you for free and open access by The Aquila Digital Community. It has been accepted for inclusion in Gulf and Caribbean Research by an authorized editor of The Aquila Digital Community. For more information, please contact . Gulf and Caribbean Research Vol 22, 29-41, 2010 Manuscript received November 12, 2009; accepted January 19, 2010 OBSERVATIONS ON THE KALLIAPSEUDID TANAIDACEA (CRUSTACEA: MALACOSTRACA: PERACARIDA) FROM THE NORTHWESTERN ATLANTIC, WITH AN ILLUSTRATED KEY TO THE SPECIES David T. Drumm and Richard W. Heard Department of Coastal Sciences, The University of Southern Mississippi, 703 East Beach Drive, Ocean Springs, MS 39564, e-mail: david.drumm@ usm.edu Abstract: New information for the kalliapseudid Tanaidacea occurring in the northwestern Atlantic is presented and discussed, including data on range extensions and new depth ranges for 4 species. The taxa studied came from the shelf and coastal waters of the southeastern United States, Puerto Rico and Trinidad. The occurrence of Mesokalliapseudes bahamensis Sieg is extended from the Bahamas and Belize to the coastal waters of East and Gulf coasts (South Carolina to West Florida). The range of Psammokalliapseudes granulosus Brum is expanded northward into the eastern Gulf of Mexico and new locality records for this species are established for Tobago and Puerto Rico. Mesokalliapseudes brasiliensis (Băcescu), previously known from the southwestern Atlantic off Brazil, is reported from the coastal waters off Trinidad. The range of Tanapseudes gutui Hansknecht, Heard, and Bamber is expanded northward into the eastern Gulf of Mexico. New depth ranges are established for Alokalliapseudes macsweenyi (Drumm) (82 m), M. bahamensis (52 m), P. granulosus (53 m), and T. gutui (82 m). An offshore form of A. macsweenyi occurs at depths ranging from 10-82 m on the inner and mid continental shelf off the west coast of Florida (Gulf of Mexico); it differs from the coastal form by the shape and dentition of the male and female chelipeds. Synonymies, diagnoses, life history remarks, and an illustrated key to the seven kalliapseudid species known from the NW Atlantic are presented. Introduction Currently 41 species representing 12 genera and 3 subfamilies comprise members of the tanaidacean family Kalliapseudidae Lang, 1956 (Anderson 2009, Drumm et al. 2009). Kalliapseudids are distributed throughout the world’s tropical, subtropical, and temperate coastal waters and with few known exceptions, are restricted to depths of less than 200 m (D.T. Drumm, pers. obser.). Within estuarine and shelf waters of the north Atlantic region the family is presently comprised of 6 nominal species contained in 4 genera and 2 subfamilies. In an unpublished master’s thesis, McSweeny (1968) presented the first well–documented discovery for a kalliapseudid from the NW Atlantic. His detailed and well–illustrated description for “Kalliapseudes sp. A” [now Alokalliapseudes macsweenyi (Drumm, 2003)] was based on specimens from southeastern Florida. The report of Gardiner (1973) for Cirratodactylus floridensis Gardiner, 1973 (now Psammokalliapseudes granulosus Brum, 1973) represents the first published record for the family from the region. Since then, descriptions and records for 4 additional kalliapseudids, Mesokalliapseudes bahamensis Sieg, 1982, M. soniadawnae Bamber, 1993, M. thalasispeleus Guţu, 2006; and Tanapseudes gutui Hansknecht, Heard and Bamber, 2002 from the northwestern Atlantic region have been published. This report deals with a review and the presentation of new information on the occurrence of members of the family Kalliapseudidae from the northwestern Atlantic. Besides new range and locality records, we present diagnoses, synon- ymies, an illustrated key, and remarks on the life histories, ecology and taxonomy for the kalliapseudid species known to occur in the northwest Atlantic region. The information presented here will be invaluable to future studies on the ecology, biogeography and phylogeography of the Kalliapseudidae. This paper was borne partly out of the senior author’s dissertation on the systematic revision of the tanaidacean family Kalliapseudidae. Materials and Methods The total length (TL) of specimens was measured from the tip of the rostrum to the tip of the pleotelson. Material from the Mississippi–Alabama–Florida Outer Continental Shelf Study (MAFLA) has been retained at the Gulf Coast Research Laboratory (GCRL) Museum, Ocean Springs, MS, USA. Morphological terminology follows Larsen (2003). Synonymies of described species, including references to pages and figures in original descriptions, are listed immediately underneath each species. Abbreviations for museums, institutions and research programs used: GCRL, Gulf Coast Research Laboratory; MAFLA, Mississippi–Alabama–Florida Outer Continental Shelf Study; MHN, Museum National d’Histoire Naturelle, Grigore Antipa, Romania; MZUSP, Museu de Zoologia, Universidade de São Paulo; NHM, Natural History Museum, London, UK; NMW, National Museum of Wales, Cardiff, UK; SCDNR, South Carolina Department of Natural Resources; SERTC, Southeastern Regional Taxonomic 29 Drumm and Heard Laboratory, Charleston South Carolina; USNM: National Museum of Natural History, Smithsonian Institution, Washington DC, USA; ZMK: Zoologisches Museum der Christian-Albrechts-Universität, Kiel, Germany. Figure 1. Alokalliapseudes macsweenyi ‘offshore morph,’ dorsal view of adult male (lateral pleonite setae mostly shown only by their bases). Scale bar = 0.5 mm. Results and Discussion Systematics Suborder Apseudomorpha Sieg, 1980 Family Kalliapseudidae Lang, 1956 Subfamily Kalliapseudinae Lang, 1956 Genus Alokalliapseudes Guţu, 2006 Mesokalliapseudes Lang, 1956 (in part) Revised Diagnosis: Antenna third article with ventromedial smooth and blunt triangular projection; last peduncle article lacking double row of plumose setae. Mandibular palp terminally with setulate seta shorter than others. Cheliped sexually dimorphic (male propodus more robust and with differing cutting edge dentition compared to female); exopodite absent. Pereopod 1 lacking exopodite. Pereopods 2 and 3 dactylus with thin, proximal digitiform prolongation e (...truncated)