Lenticulella, Hansen & Holmer, 2011

Hansen, Jesper & Holmer, Lars E., 2011, Taxonomy and biostratigraphy of Ordovician brachiopods from northeastern Ny Friesland, Spitsbergen 3076, Zootaxa 3076 (1), pp. 1-122 : 16

Genus Lenticulella gen. nov.

Derivation of name Latin ‘ lenticularis ’, lens-shaped; refers to the lens-shaped outline.

Type species. Lingulella amphora Krause & Rowell, 1975 ; Middle Ordovician, Dapingian; Nevada, western Newfoundland and Spitsbergen .

Diagnosis. Small dorsibiconvex obolinid with lenticular outline; exterior smooth except for fine growth lines; shallow pedicle groove raised above valve floor; obscure or weakly impressed visceral area with weak median ridge in anterior part; valve floor not pitted.

Remarks. Lenticulella gen. nov. is comparable only with Ovolingula Mergl, 1998 from Bohemia. Ovolingula is, however, distinguished by the presence of minute pseudointerareas with narrow pedicle groove and especially by the highly raised dorsal muscle platform and thin median septum/ridge.

Species assigned. Lingulella amphora Krause & Rowell, 1975 ; Middle Ordovician ( Orthidiella zone , Dapingian), Antelope Valley Formation, Meiklejohn Peak, Nevada; Middle Ordovician (Dapingian), Factory Cove Member, Shallow Bay Formation, western Newfoundland; Profilbekken Member, Valhallfonna Formation, northeastern Ny Friesland, Spitsbergen.