Ammovertella, Cushman, 1928

Vachard, D, Krainer, K & Lucas, SG, 2015, Late Early Permian (late Leonardian; Kungurian) algae, microproblematica, and smaller foraminifers from the Yeso Group and San Andres Formation (New Mexico; USA), Palaeontologia Electronica (English ed.) 3 (8), pp. 1-77 : 38

Genus AMMOVERTELLA Cushman, 1928

Type Species. Psammophis inversus Schellwien, 1898 .

Description. Calcivertellid characterised by a zigzagging initial coiled stage followed by an erect last stage.

Remarks. For Henbest (1963), Ammovertella is the Textulariata homeomorph of the Miliolata Calcivertella Cushman and Waters, 1928a . Inversely, Vachard and Krainer, (2001a, p. 157) have indicated that Ammovertella has a porcelaneous wall and not an agglutinated wall and consequently belongs to the family Calcivertellidae and not to the Ammodiscidae . According to Gaillot and Vachard (2007), a part of the atypical species of this genus belongs to Calcivertella or Palaeonubecularia .

We suggest here that Calcivertella , Ammovertella , and Trepeilopsis Cushman and Waters, 1928a are related but distinct genera due to their microhabitats and types of attachment. If the three genera are synonymous, Calcivertella has priority to designate the taxon.

Occurrence. Pennsylvanian-Permian, cosmopolitan.