Cephalopoda - Ammonoida - Perrinitidae

Alternative combination: Shuangyangites involutus

Full reference: X. L. Liang. 1982. Some Early Permian ammonoids from Jilin and Nei Monggol. Acta Palaeontologica Sinica 21(6):645-657

Belongs to Metaperrinites according to W. M. Furnish et al. 2009

See also Leonova 2002 and Liang 1982

Sister taxa: Metaperrinites cumminsi, Metaperrinites ishibashii, Metaperrinites milleri, Metaperrinites obsoletus, Metaperrinites schucherti, Metaperrinites shaiwaensis, Metaperrinites toumanskayae, Metaperrinites vicinus, Metaperrinites waageni, Ripernites pressulus, Mapirites latumbilicatus, Paraperrinites brouweri, Paraperrinites subcumminsi, Nepirrites medius

Type specimen: NIGP 64179. Its type locality is Zhoujiayao, ACZ1, Shuangyang County, which is in a Wordian marine horizon in the Fanjiatun Formation of China.

Ecology: fast-moving nektonic carnivore

Average measurements (in mm): shell diameter 40.1

Distribution: found only at Zhoujiayao, ACZ1, Shuangyang County

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Specimen images are retrieved through the ePANDDA API.