Helcionelloida - Stenothecidae
Synonyms: Heraultia Cobbold 1935, Heraultipegma Pojeta and Runnegar 1976
Full reference: A. W. Grabau. 1900. Palaeontology of the Cambrian terranes of the Boston Basin. Occasional Papers of the Boston Society of Natural History 4:601-694
Parent taxon: Stenothecidae according to P. J. Wagner 2023
See also Bouchet et al. 2005, Kouchinsky et al. 2017, Landing 1988, Parkhaev 2001, Parkhaev 2002, Pojeta and Runnegar 1976, Sepkoski 2002 and Wagner 1997
Sister taxa: Acanthotheca, Eurekapegma, Mellopegma, Planutenia, Pseudoscenella, Stenotheca, Stenothecinae, Watsonellinae
Subtaxa: Watsonella crosbyi Watsonella terranovica
Type: Watsonella crosbyi
Ecology: stationary epifaunal suspension feeder
Distribution:
• Cambrian of Australia (3 collections), Canada (21: Newfoundland and Labrador, Nova Scotia), China (37), the Russian Federation (14), Saint Pierre and Miquelon (1), United States (2: Massachusetts, Nevada)
• Placentian of United States (1: Massachusetts)
Total: 79 collections including 80 occurrences
Specimen images are retrieved through the ePANDDA API.
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