Numerous specimens of poorly known pleustid amphipod Pleusymtes japonica (Gurjanova, 1938) (Crustacea: Amphipoda: Pleustidae: Pleusymtinae) were found in association with large hermit crab Pagurus ochotensis Brandt, 1851 (Crustacea: Decapoda: Paguridae) near Furugelma Island in the Sea of Japan. This is the first report of the species in association with hermit crabs. Amphipods were found livin...

The holotype specimen of Ancylomenes australis, new species, (Crustacea: Decapoda: Pontoniinae) from Sodwana Bay, South Africa, is described and illustrated. It is the only species of the genus reported from south east Africa. It is an associate of cerianthid anemones and has a species specific colour pattern. Closely similar to A. venustus (Bruce, 1990) it is readily distinguished from it and ...

A new species of callianassid shrimp genus Nihonotrypaea Manning & Tamaki, 1998 (Crustacea: Decapoda: Axiidea: Callianassidae) is described from the Peter the Great Bay, Primorye, Russian coast of the Sea of Japan. The species clearly differs from other representatives of the genus by unique armature of ventral margin of merus and different form of carpus of major cheliped in males and yellow-g...

Fresh water prawns, Macrobrachium lamarrei and Macrobrachium dayanum (Crustacea-Decapoda) were subjected to static bioassay tests to ascertain the LC50 values of copper sulphate. The 24, 48, 72 and 96 hr LC50 values of copper sulphate for M. lamarrei were 0.38, 0.361, 0.343 and 0.300 mg/l and for M. dayanum were 1.634, 0.988, 0.532 and 0.418 mg/l respectively. Behavioral responses and LC50 valu...

234 * To whom correspondence and reprint requests should be addressed. Ophiuroids are among the most common and conspicuous macro-invertebrates in shallow water habitats. Many species live in association with larger invertebrates, such as sponges, corals and other echinoderms (e.g., Baker et al. 2001, Tominaga et al. 2004, Henkel and Pawlik 2005). However, ophiuroids themselves may serve as hos...

CRUSTACEANS AND OPSIN EVOLUTION Megan L. Porter Department of Microbiology and Molecular Biology Doctor of Philosophy Composed of a chromophore bound to an integral membrane protein (opsin), visual pigments are phenotypically characterized by the wavelength of maximal absorption (λmax). The underlying molecular mechanism controlling λmax is the interaction between the opsin amino acid sequence ...

First stage larva of the lobster shrimp Allaxius princeps (Boas, 1880) (Decapoda: Axiidea: Axiidae) obtained from the ovigerous female is described and illustrated for the first time. It is the first description of the larva of lobster shrimp from West Pacific. Zoea I of A. princeps is characterized by the presence of four dorsal spines on the pleonal somites 2–5 and by the shape of the telson ...

Zoeal stages of the mud shrimp Nihonotrypaea petalura (Stimpson, 1860) (Decapoda: Axiiidea: Callianassidae) inhabiting Peter the Great Bay (Sea of Japan) is described and illustrated from the larvae reared in the laboratory individually. The development included seven zoeal stages before molting to the megalopa. At 22-23°C the first megalopa was attained 26 days after hatching. A range of the n...

The first complete re-description of mud-dwelling axiid Leonardsaxius amurensis (Kobjakova, 1937) (Crustacea: Decapoda: Axiidea) is presented based on the holotype and freshly collected specimens from Vostok Bay, Russia coast of the Sea of Japan. The species is mostly morphologically similar to Leonardsaxius spinulicauda (Rathbun, 1902) known from Pacific coasts of North America from Vancouver ...