Diogenes holthuisi, a new species of hermit crab (Decapoda, Anomura, Diogenidae) from shallow waters of the Ogasawara (Bonin) Islands, Japan

This chapter describes and illustrates Diogenes holthuisi , a new species of hermit crab from shallow waters of the Ogasawara (Bonin) Islands, Japan. The new species is characterized by the bifid shaped antennal acicles and presence of a few very strong spines posterior to the spine row on the branchiostegite. By these characters, the new species is easily distinguished from other species among the species group of Diogenes with a simple intercalary rostral process and the antennal peduncles longer than the ocular peduncles. The systematics of the new species is also discussed in detail. Keywords: Diogenes holthuisi ; hermit crab; Japan; Ogasawara Islands; shallow waters; systematics