A new genus, Ngankeecaris (Decapoda, Palaemonidae), with supplementary records of its type species, N. dardanicola (Bruce & Okuno, 2006) from the Ryukyu Islands, Japan.

A new palaemonid shrimp genus, Ngankeecaris gen. nov. is established for two western Pacific species, Periclimenes acanthimerus Bruce, 2006 and P.

New records of two species of the coral reef shrimp genus Thor Kingsley, 1878 (Crustacea: Decapoda: Thoridae) from the Ryukyu Islands, Japan.

The caridean shrimp genus Thor Kingsley, 1878 (Thoridae) is currently represented by 14 species distributed in shallow tropical to subtropical waters in the Indo-Pacific, East Pacific and West Atlantic oceans. In this study, two species of the genus are reported on the basis of material from Okinawa and Kume islands in the Ryukyu Archipelago, southern Japan. Thor leptochelus (Xu & Li, 2015) n.

Inferences on mating and sexual systems of two Pacific Cinetorhynchus shrimps (Decapoda, Rhynchocinetidae) based on sexual dimorphism in body size and cheliped weaponry.

Sexual dimorphism in body size and weaponry was examined in two Cinetorhynchus shrimp species in order to formulate hypotheses on their sexual and mating systems. Collections of Cinetorhynchus sp. A and Cinetorhynchus sp.

Periclimenes speciosus, a new species of anthozoan associated shrimp (Crustacea: Decapoda: Palaemonidae) from southern Japan.

A new species of palaemonid shrimp, Periclimenes speciosus sp. nov., is described and illustrated on the basis of 20 specimens collected from warm-temperate and subtropical waters of southern Japan.