TL;DR: Seven species of the shell-bearing heterobranch gastropods collected during Cruise 51 of R/V Akademik M.A. Lavrentyev in the northern part of the Sea of Japan represent the new data on the fauna of Heterobranchia in the bathyal zone from this area.
Abstract: Seven species of the shell-bearing heterobranch gastropods collected during Cruise 51 of R/V Akademik M.A. Lavrentyev in the northern part of the Sea of Japan represent the new data on the fauna of Heterobranchia in the bathyal zone from this area. Taxonomic descriptions of two new species, Parvaplustrum japonicum sp. nov., and Retusa lata sp. nov., are presented herein with remarks on morphology and distribution. The finding of Toledonia cf. limnaeoides ( Odhner, 1913 ) is the first record of the genus Toledonia for the northern Pacific. The present records for Diaphana hiemalis (2693–2725 m) and Cylichna toyamaensis (1001–2555 m) are the deepest.
TL;DR: The genus Micromelo (family Aplustridae) occurs in almost all tropical and subtropical waters across the globe, with the exception of the Eastern Pacific.
Abstract: The genus Micromelo (family Aplustridae) occurs in almost all tropical and subtropical waters across the globe, with the exception of the Eastern Pacific. Most authors consider Micromelo undatus (B...
TL;DR: The family Aplustridae, occurring in the waters of Singapore, is reviewed andHydatina albocincta and Hydatina zonata are represented in Singapore waters.
Abstract: The family Aplustridae, occurring in the waters of Singapore, is reviewed. The family is represented in Singapore waters by Hydatina albocincta and Hydatina zonata. Diagnoses, figures, records, and other information on both species are provided as part of an effort to document the diversity of the malacofauna in Singapore.