Tanaidacea from Brazil. I. The family Tanaellidae Larsen & Wilson, 2002

摘要

Both male and female of two new species, i.e. Araphura arvedlundi n. sp. and Tanaella kroyeri n. sp. were collected from the continental slope of the Atlantic coast off northern Brazil and are described. This is the first record of the male of Araphura. An updated key is given to genus Araphura. Araphura io is transferred to the genus Araphuroides. This is the first in a series of systematic papers on the Tanaidacea from the deep Central Atlantic waters off Brazil, based on material collected under the Oil-exploration programs conducted by Petrobras and with a focus on the tanaidomorphan family Tanaellidae Larsen & Wilson, 2002.While quite a number of taxonomic papers on the Tanaidacea of Brazil, have been published (Kr0yer 1842, Mané-Garzón 1949, Lang 1956, Silva-Bram 1971, 1973, 1978, Bácescu 1979, 1986, Masunari & Sieg 1980, Sieg 1983, Bácescu & Absalao 1985, Gutu 1996,1998, Larsen 1999, Santos 2004, Santos & Pires-Vanin 2006, Santos & Hansknecht 2007), much is still unknown, particularly the deep-sea fauna. The only deep-sea species described or recorded so far belong to the suborders Apseudomorpha and Neotanaidomorpha and are restricted to a few genera (Gardiner 1975, Larsen 1999, Santos 2004, Santos & Hansknecht 2007). The above listed papers combined describe or record a total of 39 species (excluding the new ones described in this paper) but almost all are recorded from shallow water and most (26) are from the suborder Apseudomorpha. This study reports on two new tanaidomorphan species. A list to the tanaidaceans recorded from Brazil is given in table 1.