Pawsonellus

Thandar, 1986

1 species

Small short barrel shaped species with pedicels restricted to ambulacra in double rows, shorter dorsally; interambulacra naked. Tentacles 10 (12), ventral two reduced to stubs, each bilobed at extremity. Calcareous ring simple, no posterior bifurcations of processes to radial plates but radial and interradial plates with long anterior projections. Body wall spicules exclusively thick, imbricating, multi-locular plates of two types; majority oblong, smooth, with small, often occluded holes; others irregular to discoidal with larger holes and often one or more tiny nodules. Pedicels with minute, smooth to slightly nodular plates; end plates absent. Tentacles and introvert with rosettes and irregular smooth multi-locular plates. (Thandar, 1986)

A genus of small, somewhat U- or barrel shaped species with pedicels restricted to ambulacra in double rows, shorter dorsally; interambulacra naked. Tentacles 10, ventral two reduced to stubs. Calcareous ring simple, no posterior bifurcation to radial plates, but radial and interradial plates with long anterior projections. Body wall spicules exclusively thick, imbricating, multilocular plates of two types: majority oblong, smooth, with small, often occluded, holes; others irregular to discoidal with larger holes and often one or more tiny nodules. Pedicels with minute, irregular, smooth to slightly nodular plates; end plates absent. Tentacles with rosettes and irregular smooth, multilocular plates. Introvert with rosettes. (Thandar, 1991)