Rhynchonellata - Orthida - Hesperonomiidae
Synonym: Engenella
Parent taxon: Hesperonomiidae according to A. Williams et al. 2000
See also Benedetto 2003 and Sepkoski 2002
Sister taxa: Hesperonomia, Mollesella, Monorthis, Murjukiana, Protohesperonomia, Treioria, Zhanorthis
Subtaxa: Hesperonomiella arcuata Hesperonomiella porcias Hesperonomiella uzunbulakensis
Type: Protorthis porcias
Ecology: stationary epifaunal suspension feeder
Distribution:
• Ordovician of Canada (1: British Columbia collection), Kazakhstan (2), United States (5: Nevada, Utah)
• Whiterockian of United States (1: Utah)
• Arenigian of Argentina (3), United States (2: Nevada, Utah)
• Arenig of Argentina (1), the United Kingdom (1)
• Canadian of Canada (2: Northwest Territories, Québec)
Total: 18 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
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