Genus Lissotesta Iredale, 1915

Type species

Cyclostrema micra Tenison Woods, 1877 (original designation), Recent, Tasmania.

Remarks

In his discussion of Lissotesta, Warén (1992) listed Submargarita impervia (Strebel, 1908) as a member of this genus. However, S. impervia is also the type species of Photinula (Submargarita) Strebel, 1908 . Therefore, if this referral is correct, Lissotesta is in fact a junior synonym of Submargarita . However, contemporaneously Dell (1990) treated Submargarita and Lissotesta as distinct genera and refigured the holotype of Photinula (Submargarita) impervia Strebel, 1908 . In the original description of impervia, Strebel (1908) stated “ein Nabel fehlt” (an umbilicus lacking), a fact confirmed in Dell’s illustration of the holotype. This is not consistent with the diagnosis of Lissotesta given by Warén (1992: 169), in which the umbilicus is open and deep. I consequently choose to follow Dell (1990) in treating Submargarita and Lissotesta as separate entities.