Rhynchonellata - Terebratulida - Cryptonellidae
Alternative spelling: Dielasma (Heterelasma)
Full reference: G. H. Girty. 1908. The Guadalupian fauna. United States Geological Survey Professional Paper 58:1-651
Parent taxon: Cryptonellinae according to A. Williams et al. 2006
See also Reed 1944
Sister taxa: Booralia, Cryptonella, Dielasmella, Gacina, Petriathyris, Texarina
Subtaxa: Dielasma (Heterelasma) semitarium Heterelasma angulatum Heterelasma concavum Heterelasma contortum Heterelasma contrerasi Heterelasma geniculatum Heterelasma gibbosum Heterelasma glansfagea Heterelasma lenticularia Heterelasma magnum Heterelasma ngariensis Heterelasma pentagonum Heterelasma quadratum Heterelasma shumardianum Heterelasma solidum Heterelasma sulciplicatum Heterelasma venustulum
Ecology: stationary low-level epifaunal suspension feeder
Distribution:
• Triassic of the Russian Federation (1 collection)
• Permian of China (1), Mexico (7), Nepal (1), Pakistan (1), United States (105: Nevada, New Mexico, Texas)
Total: 116 collections including 144 occurrences
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.