ammonites
Heterelasmina elegantula Grabau 1931 (lamp shell)

Rhynchonellata - Terebratulida - Heterelasminidae

Alternative combination: Jisuina elegantula

Full reference: A. W. Grabau. 1931. The Permian of Mongolia. Natural History of Asia 4:1-665

Belongs to Heterelasmina according to T. N. Smirnova 2007

Sister taxa: Heterelasmina costata, Heterelasmina cuboides, Heterelasmina dieneri, Heterelasmina genuflexa, Heterelasmina latesinuata, Heterelasmina planoventris, Heterelasmina pygmaea, Heterelasmina regularis

Type specimen: Its type locality is Jisu Honguer Limestone Undivided, which is in a Wordian carbonate limestone in the Zhesi Formation of China

Ecology: stationary epifaunal suspension feeder

Average measurements (in mm): shell 7.70 x 5.00