RESUMO
A new species of the laomediid mud shrimp genus Axianassa Schmitt, 1924, A. planioculus, is described and illustrated on the basis of a single male specimen from intertidal muddy sand flat of Kabira Bay, Ishigaki Island, southern Ryukyu Islands, Japan. Axianassa planioculus n. sp. is morphologically closest to A. mineri Boone, 1931, known from Pacific Panama, among the 11 known congeners, but is readily distinguished from the latter by the eyes being dorsally concealed by the rostrum, the subovate telson, the unarmed carpus of the maxilliped 3 and the unarmed uropodal endopod. The discovery of a new mud-shrimp species in an easily accessible habitat indicates that the shallow-water infaunal decapods are still relatively poorly known. A partial segment of the mitochondrial 16S rRNA gene was sequenced from the holotype for future genetic studies.
Assuntos
Decápodes , Distribuição Animal , Estruturas Animais , Animais , Ilhas , Japão , Masculino , Tamanho do Órgão , Panamá , RNA Ribossômico 16SRESUMO
A new species of the thorid shrimp genus Lebbeus White, 1847 is reported upon from a deep-sea cold seep site off southwestern Taiwan. The new species belongs to the group characterized by the possession of epipod only on maxilliped III and pereiopod I, and appears closest to L. curvirostris Zarenkov, 1976, known only from off Peru, Eastern Pacific and L. manus Komai & Collins, 2009 from the Manus Basin, Bismarck Sea, Southwest Pacific. It differs from the latter two species in having a larger supraorbital tooth and more numerous spines on the meri of the pereiopods III to V. The present new species is the fifth of the genus known from waters around Taiwan.