Helcionelloida - Helcionellida - Helcionellidae
Synonyms: Hamataconus pygmaeus Chen and Xiong 1983, Hamatoconus pygmaeus Chen and Xiong 1983, Obtusoconus pygmaeus Chen and Xiong 1983
Full reference: W. Yü. 1979. Earliest Cambrian monoplacophorans and gastropods from western Hubei with their biostratigraphical significance. Acta Palaeontologica Sinica 18(3):233-270
Belongs to Obtusoconus according to A. Kouchinsky et al. 2017
See also Chen 1984, Chen and Xiong 1983, Missarzhevsky 1989 and Parkhaev 2001
Sister taxa: Obtusoconus ampla, Obtusoconus brevis, Obtusoconus foliaceus, Obtusoconus grossicostus, Obtusoconus honorabilis, Obtusoconus mirabilis, Obtusoconus reduncus, Obtusoconus vostokovae, Hematoconus pygmaeus
Type specimens:
- Obtusoconus paucicostatus: Its type locality is Yangtzeconus priscus - Archaeospira ornata assemblage, Yangtze Gorge, Yichang, which is in a Tommotian carbonate phosphorite in the Huangshandong Formation of China
- Obtusoconus pygmaeus:
Ecology: slow-moving low-level epifaunal detritivore
Distribution:
• Cambrian of China (5 collections)
Total: 5 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
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