Tridentella Richardson, 1905

Restricted synonymy: Brandt & Poore, 2001: 200.

Remarks: Many species of Tridentella are highly ornamented, some with cephalic processes, or with heavily spinose dorsal surfaces, and the pleotelson often has longitudinal ridges and serrate lateral margins. A few species totally lack any form of ornamentation, these being T. japonica Thielemann, 1910, T. recava Bowman, 1986, T. laevicephalax Menzies, 1962 (Carvacho 1977) and now Tridentella memikat sp. nov. and Tridentella tanimbar sp. nov.; Tridentella brandtae sp. nov., is so weakly nodulose as to appear without ornamentation. Brandt and Poore (2001) list the species known to date.