In recent years the systematic position of genera in the shrimp families Gnathophyllidae and Hymenoceridae has been under debate, with phylogenetic studies suggesting the families are not real family level units. Here, we review the molecular evidence as well as the morphological characters used to distinguish both families, leading to the conclusion that neither family is valid. Further, we st...

A new genus, Leptomenes, is designated for the pontoniine shrimp Periclimenes dolichosternum & Mitsuhashi, 2003. The single species is known only from the type material from the Ryukyu Islands, Japan. Resumé : Un nouveau genre, Leptomenes, pour le crevette pontoniinae, Periclimenes dolichosternum Okuno & Mitsuhashi, 2003 (Crustacea : Decapoda : Palaemonidae). Un nouveau genre, Leptomenes, est p...

A new genus and species of sponge-associated pontoniine shrimps (Crustacea: Decapoda: Palaemonidae: Pontoniinae) is described from northern part of Formosa Island (Taiwan). The new species can be clearly recognized by convex robust nail-like apices on dactyli of both pereiopods II--a unique morphological structure among pontoniine shrimps. Morphological differences from all known sponge-associa...

Abstract Marine symbiotic Palaemonidae, comprising over 600 species, live in association with marine invertebrates of different phyla, like Cnidaria, Echinodermata, Mollusca, Porifera, and Tunicata. A phylogenetic study is performed on a clade bivalve- ascidian-associated endosymbiotic shrimp species (Caridea: Palaemonidae), using morphological molecular data. Total Evidence approach used order...

Variations in larval instar number are common among arthropods. Here, we assess the implications of temperature-mediated variations in larval instar number for larval development time, larval growth rates, and juvenile dry weight within the palaemonid shrimp, Palaemonetes varians. In contrast with previous literature, which focuses on terrestrial arthropods, particularly model and pest species ...

A new species of pontoniine shrimp, Periclimenes nevillei, from Espiritu Santo, Vanuatu, is described and illustrated. The species is an associate of an antipatharian host, Cirripathes sp. A member of the Periclimenes brevicarpalis species group, to which a key is provided, it most closely resembles Periclimenes albolineatus Bruce & Coombes, 1997.