Hapalosoma Mortensen, 1903

Anderson, Owen F., 2013, A review of New Zealand and southeast Australian echinothuriinids (Echinodermata: Echinothuriidae) with descriptions of seven new species, Zootaxa 3609 (6), pp. 521-567 : 559

Hapalosoma Mortensen, 1903

Type species: Asthenosoma pellucidum A. Agassiz, 1879 , by original designation.

Diagnosis —Like Araeosoma but smaller and lacking primary tubercles from admedian regions of aboral ambulacral and interambulacral plates. Blades of dactylous pedicellariae reduced to fine, gland-enveloped rods (emended from Fell 1966).

Remarks —There are three assigned species, all Recent ( Table 2 ).