Hippasteria heathi Cluster

Mah, Christopher L., 2022, New Genera, Species and Occurrences of Deep-Sea Asteroidea (Valvatacea, Forcipulatacea, Echinodermata) collected from the North Pacific Ocean by the CAPSTONE Expedition, Zootaxa 5164 (1), pp. 1-75 : 49

Hippasteria heathi Cluster

Diagnosis (Based on Mah et al. 2014). Abactinal surface covered by tubercles and/or low, thick, conical spines with blunt, pointed tips, which sit relatively close to the surface. Large (easily> 2.0 mm) bivalve pedicellariae with smooth valves present with some abundance over abactinal surface. Large bivalve pedicellariae present on, generally bisecting or occupying most of, marginal plates ( Fig. 4D ) in all specimens examined. Marginal plate border directed laterally, obscured by granules, spination.

Figures

FIGURE 4. Freyastera mortenseni (Madsen, 1956). Scale bar=3.0 mm. A. Whole body-top/lateral view. B. In situ abactinal view showing disk. C. Oral view showing mouth spines. D. Pedicellariae with articulated valves. Scale bar=20 µm E. Individual valve showing teeth on tip. F. Oral view showing tube foot groove as well as lateral and furrow spines.