Hansenothuria

Miller & Pawson, 1989

1 species

Body fragile, translucent, semi-cylindrical, tapering gently anteriorly and posteriorly, four to five times as long as broad. Ventral surface flat, body arched, middorsal interradial area depressed. Ventrolateral margin fringed with short to long papillae joined by continuous brim; brim broadest anteriorly, where component podia may reach 25 mm in length. Midventral radius naked; ventrolateral radii with numerous, miniscule hair-like feet in two or three rows. Each lateral dorsal radius with 10-31 short (15mm) sharply pointed papillae arranged in slightly zigzag row. Excepting endplated in ventral feet, ossicles exclusively simple rods, occuring only in tentacles, papillae, and feet. Gonad as two tufts of tubules, one to each side of dorsal mesentery. This genus differs from the similar Bathyplotes and Paelopatides and other synallactid genera in possessing very simple body ossicles. It further differs from Bathyplotes in having a dorsally positioned anus, and from Paelopatides in lacking feet along the midventral radius. (Miller & Pawson, 1989)