TL;DR: A cladistic analysis supports Evoplosoma as a derived deep water lineage relative to its continental-shelf, shallow water sister taxa and Hippasteria caribaea is reassigned to the genus Gilbertaster, which previously contained a single Pacific species.
TL;DR: Three new species of Hippasteria, rooted against Evoplosoma, are described from deep-water settings, and discussions about biogeography, cladogenic events, and morphology are presented.
TL;DR: A new species of corallivorous goniasterid, Evoplosoma watlingi n. sp., from Bear Seamount in the North Atlantic is described in conjunction with an overview of other species within the genus Evplosoma.
Abstract: A new species of corallivorous goniasterid, Evoplosoma watlingi n. sp., from Bear Seamount in the North Atlantic is described in conjunction with an overview of other species within the genus Evoplosoma. Hippasteria tasmanica McKnight, 2006 is re-classified within Evoplosoma. In situ images of Atlantic deep-sea Goniasteridae, including Evoplosoma spp., Hippasteria phrygiana and Circeaster americanus, are presented herein. Observations of several Evoplosoma species and the Atlantic C. americanus are documented for the first time, recorded by the R/V Okeanos Explorer. The feeding duration of C. americanus is also documented for the first time.
TL;DR: A new species of goniasterid sea star, Hippasteria aleutica sp.
Abstract: A new species of asteriid sea star of the genus Leptasterias (Order Forcipulatida) is described from the nearshore waters of the Aleutian Islands. Leptaterias tatei sp. nov. is distinguished from Leptasterias stolacantha Fisher, 1930, by the characteristics of the spines and pedicellariae. Geographic distribution is discussed and a key to the five-rayed Leptasterias of the Aleutian Islands is provided.