New and poorly known acrotretid brachiopods (Class Lingulata) from the Cedaria-Crepicephalus zone (late Middle Cambrian) of the Great Basin, USA
2006 (English)In: Geobios, ISSN 0016-6995, E-ISSN 1777-5728, Vol. 39, no 1, 125-154 p.Article in journal (Refereed) Published
Seven new late Middle Cambrian (Cedaria-Crepicephalus zone) acrotretid species are described from the Great Basin, USA. The species belong to five genera of which Lensotreta is new. The following new species are described: Anabolotreta? glabra, Anabolotreta mogota, Canthylotreta crista, Dactylotreta elegantula, Lensotreta perplexa, Opisthotreta transversa, and Opisthotreta indistincta. The shell structure of Canthylotreta is described for the first time based on new material of the type species Canthylotreta marjumensis and of the new species C. crista. The shell of Canthylotreta includes two types of shell fabric, camerate and columnar. Moreover, parts of the shell show transitional textures, supporting the view that the camerate shell structure may has originated from a columnar fabric. Picnotreta lophocracenta Robson and Pratt, 2001, recently described from western Newfoundland, is also described from the new occurrence in the Great Basin.
Place, publisher, year, edition, pages
2006. Vol. 39, no 1, 125-154 p.
Brachiopoda, Linguliformea, Acrotretida, Middle Cambrian, Great Basin, new taxa
IdentifiersURN: urn:nbn:se:uu:diva-75229DOI: 10.1016/j.geobios.2004.10.004OAI: oai:DiVA.org:uu-75229DiVA: diva2:103139