Genus Abertella Durham, 1953

1958 Karlaster Marchesini Santos, 1958, p. 16

Emended diagnosis. As for the family, see above.

Type species. Scutella aberti Conrad, 1842, by original designation (Durham 1 953, p. 350).

Included species. A. aberti (Conrad, 1842); A. cazonesensis Kew in Dickerson & Kew, 1917; A.? habanensis (Sánchez-Roig, 1949); A. palmeri Durham, 1957; A. pirabensis (Marchesini Santos, 1958); A. gualichensis Martínez et al., 2005; A. dengleri Osborn & Ciampaglio, 2010; A. miskellyi Kroh et al., 2013 .

Remarks. Of the above included species, only A. pirabensis, A. gualichensis, and A. miskellyi are known to occur in South American outcrops. Abertella ? habanensis is provisionally listed as an Abertella until further information comes to light on this species. Abertella kewi Durham, 1957, as listed by Kroh et al. (2013), is hereby formally removed from Abertella and moved provisionally to Camachoaster as Camachoaster ? kewi, as it no longer satisfies the emended diagnosis provided in this paper.