Deep-Sea Tanaidacea (Peracarida) from the Gulf of Mexico
This book deals with a large number of deep-sea taxa of Tanaidacea from the Gulf of Mexico, primarily collected during the Deep Gulf of Mexico Benthos Study and the North Gulf of Mexico Continental Shelf Study. Four new genera, "Aramaturatanais, Caudalonga, Insociabilitanais," and "Pseudoarthrura" are described. Twenty-one new species belonging to those new genera and to "Anarthruropsis, Araphura, Araphuroides, Chauliopleona, Filitanais, Leptognathia, Leptognathiella, Leviapseudes, Meromonakantha, Paragathotanais, Paranarthrura, Robustochelia," and "Stenotanais" are described as well, in many cases by both sexes. The female of "Paragathotanais typicus" and the male "Pectinapseudes" magnus are described herein for the first time. The genus "Crurispina" is renamed "Spinitanaopsis" as its original name was found to be preoccupied. Keys are presented for the genera "Atlantapseudes, Pectinapseudes, Sphyrapoides, Kudinopasternakia, Paragathotanais, Paranarthrura, Anarthruropsis, Filitanais, Leptognathiella, Mesotanais, Araphura, Araphuroides, Robustochelia," and "Stenotanais," Information about distribution and bathymetric range is included. Also, global distribution patterns and dispersal mechanisms applying to the Tanaidacea are discussed. Most deep-sea species appear to be widely distributed and show remarkably wide depth ranges. Misidentification is suggested as the cause of many of those apparently widely distributed tanaidaceans. Wide bathymetric ranges have been recorded for many species, and their apparent pressure tolerance may contribute to facilitating dispersal. The known distribution patterns in the Gulf of Mexico seem merely to reflect sampling effort. In addition to thespecific parts, this text gives a review of tanaidacean morphology, anatomy, physiology, ecology, development, reproduction, behaviour, and of other aspects of their biology.
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Suborder Neotanaidomorpha Sieg 1980
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aesthetascs Antenna Antennule Antennule fig Apseudes Apseudomorpha Bacescu basal article basis Bathymetric range Biology Bird & Holdich body length Carapace carpus Cheliped coxa Crustacea Dactylus and unguis deep-sea denticles DGoMB Diagnosis dorsal spine elongate endopod article Epignath eye-lobes female fixed finger free pleonites fused G. O. Sars genera genus Grigore Antipa Gufu Gulf of Mexico Hansen holotype incisor inner margin Ischium JunOO Known distribution Kudinova-Pasternak Labium Larsen & Heard left mandible Leptognathia long as article long as wide longer than article longer than propodus male manca mandible mandible fig Maxilla maxilliped Maxillule fig medial Merus mouthparts naked NGoMCSS non-ovigerous 9 USNM palp Paranarthrura Peracarida Pereon pereonites Pereopods 4-6 Pleon Pleopods pleotelson right mandible Scale bars equal sclerite seta dorsally setae ventrally setulated setulose setae Sieg & Heard simple setae distally Species currently assigned spiniform setae distally tanaid Tanaidacea Tanaidomorpha terminal setae three setae tube Uropodal Uropodal exopod