Nautilocaris saintlaurentae gen. nov., sp. nov., is described and illustrated from hydrothermal vents in the North Fiji Basin and Lau Basin in the south-western Paci¢c. This new taxon is assigned to the Alvinocarididae. It has a well-developed, dorsally dentate rostrum, carapace with pterygostomian spine present, eye broadly fused mesially, epipod^setobranch complex present above pereopods, and...

The morphology of the first zoeal stage of Periclimenes paivai Chace is described and illustrated for the first time. Larvae were obtained from three females with embryos, caught in the type locality (Cananéia, São Paulo state, Brazil). The morphological characters are detailed and compared with all previous descriptions of larvae in the genus (P. amethysteus, P. brevicarpalis, P. diversipes, P...

Atyid freshwater shrimps are globally distributed and form an important part of freshwater ecosystems, particularly in the tropics and subtropics. Despite their widespread distribution and ecological importance, their phylogenetic relationships are largely unresolved. Here we present the first comprehensive molecular phylogeny of the Atyidae investigating the evolutionary relationships among 32...

Embryos, larvae, and adults of Palaemonetes argentinus tolerate a wide range of salinities (1 to 25‰). While osmoregulatory capacities have previously been demonstrated in all postembryonic stages, little is known about the occurrence of osmoregulation during the embryonic phase. We examined ontogenetic and salinity-induced changes in the activity of a key enzyme involved in osmoregulation, Na+...

The hippolytid genus Paralebbeus Bruce & Chace, 1986, is only known from two species, P. zotheculatus Bruce & Chace, 1986 (type species) and P. zygius Chace, 1997. Both are known from the western Pacific, though P zotheculatus was originally described from the Australian Northwest Shelf in the Indian Ocean. In this paper, a new species, P. mollis, is described and illustrated on the basis of a ...

A new species of the caridean family Hippolytidae, Thor hainanensis sp. nov., is described and illustrated based on specimens from Hainan Island, China. The carpus of the second pereopod is six-segmented; the mandible has only the incisor process and the molar process; the third segment of antennular peduncle has one subtriangular dorsal scale. Those morphological characters easily classify thi...

The commercial deep-sea caridean shrimp Heterocarpus gibbosus Spence Bate, 1888 has long been recorded from India and constitutes an important part of the catches in the context of the further development of deep-sea fisheries in India. A recent survey in some deep-sea fishing ports in southern India, however, revealed that all material previously reported as "H. gibbosus" is actually a misiden...

A new peppermint shrimp species, Lysmata jundalini sp. nov., is described based on five specimens collected in shallow subtidal waters on Enrique Reef at the University of Puerto Rico, Mayagüez Isla, Magueyes Laboratories. Lysmata jundalini sp. nov. was identified from fresh material collected at the reef crest and back reef among coral rubble in June 2005 and April 2009. The new species is mos...

A new species of the alpheid shrimp genus Salmoneus Holthuis, 1955, S. antricola n. sp., is described and illustrated on the basis of a single ovigerous specimen from an aphotic marine cave at a depth of 12 m, off Ie Island, Okinawa Islands, the Ryukyu Archipelago. It is morphologically similar to five species presently referred to the S. jarli (Holthuis, 1951) species group: S. erasimorum Dwor...