Heterocypris spadix sp. nov. (Crustacea: Ostracoda: Cypridoidea) from Japan, with Information on Its Reproductive Mode

We describe the cypridoidean ostracod Heterocypris spadix sp. nov. from brackish water on Okinawa Island, Japan. The species closely resembles salina (Brady, 1868) but differs in that (1) marginal infolds valves are less developed, (2) tubercles anterior margin of right valve completely covered by selvage and invisible inner view, (3) calcified lamella ventral left is scarcely evident as margins bend inwardly. determined partial sequences for cytochrome c oxidase subunit I (COI; cox1) 18S rRNA genes H. future DNA barcoding phylogenetic analyses. Our sample contained only females. A breeding experiment revealed females reproduce parthenogenetically. Another showed has low tolerance to desiccation, with all individuals at 25°C dying between 1–2 hours after removal water. amplified sequenced a 16S sequence endosymbiotic bacterium Cardinium spadix. Infection may be related parthenogenetic reproductive mode we observed