Strophomenata - Productida - Productellidae

Full reference: R. E. Grant. 1976. Permian brachiopods from southern Thailand. Paleontological Society Memoir 9:1-269

Belongs to Haydenella according to R. E. Grant 1976

Sister taxa: Haydenella bihemisphaera, Haydenella carina, Haydenella chilianshaniana, Haydenella deminuta, Haydenella dutkevitchi, Haydenella elongata, Haydenella eminens, Haydenella gefoensis, Haydenella granti, Haydenella heilongjiangensis, Haydenella khasorensis, Haydenella kiangsiensis, Haydenella libera, Haydenella miaolingensis, Haydenella minuta, Haydenella nanusa, Haydenella paradoxica, Haydenella plicata, Haydenella qinglongensis, Haydenella salinaria, Haydenella subextensa, Haydenella tersa, Haydenella wangqingensis, Haydenella wenganensis, Haydenella wilczeki, Haydenella zhejiangensis, Productus (Haydenella) quaesitus

Type specimen: USNM 212554, a partial shell (Articulated shell). Its type locality is USNM9269, Block 1, Khao Chang Hill, Rat Buri, which is in a Roadian offshore shelf limestone in the Rat Buri Formation of Thailand.

Ecology: stationary low-level epifaunal suspension feeder

Average measurements (in mm): valve 23.0 x 27.0