ammonites
Schrenkiella periovalis Waterhouse and Gupta 1983 (lamp shell)

Strophomenata - Productida - Schrenkiellidae

Alternative combination: Linoproductus periovalis

Full reference: J. B. Waterhouse and V. J. Gupta. 1983. An early Djulfian (Permian) brachiopod faunule from upper Shyok Valley, Karakorum Range, and the implcations for dating of allied faunas from Iran and Pakistan. Contributions to Himalayan Geology 2: Stratigraphy and Structure of Kashmir and Ladakh Himalaya 188-233

Belongs to Schrenkiella according to B. Waterhouse and Z. Q. Chen 2007

Sister taxa: Schrenkiella abrupta, Schrenkiella schrenki

Type specimen: USNM 153719, a valve (Ventral valve)

Ecology: stationary low-level epifaunal suspension feeder