Original diagnosis by Hartman (1959: 408-409): "Pointed setae and hooded hooks are present in both thorax and ... [details]
Mission and Newport Bays, and Anaheim Slough in Southern California. Also in San Diego, California. [details]
The species inhabits mud flats in low, intertidal zones. [details]
The species Areniella filiformis Verrill, 1874, the type species of the genus, was considered by Hartman (1947: ... [details]
The synonymy between Isomastus Gravier, 1911 and Capitella Blainville, 1828 was first suggested by Augener (1932: ... [details]
Anotomastus gordiodes (Moore, 1909). [details]