†family Circothecidae Rozanov et al. 1969

Hyolitha - Orthothecida - Circothecidae

Synonym: Larawidae Kruse 1990 [replaced name]

Full reference: A. Y. Rozanov, V. V. Missarzhevsky, N. A. Volkova, L. G. Voronova, I. N. Krylov, B.M. Keller, I. K. Korolyuk, K. Lendzion, R. Mikhnyar, N. G. Pykhova, and A. D. Sidorov. 1969. Tommotskiu jarus i problema nizhney granisty kembriya [The Tommotian Stage and the Cambrian lower Boundary problem]. Trudy Geoligske Institut Leningrad 206:1-379

Parent taxon: Orthothecida according to P. Y. Parkhaev and Y. Demidenko 2010

See also Azmi and Pancholi 1983, Kruse 2002 and Rozanov et al. 1969

Sister taxa: Aldanothecidae, Allathecidae, Ancheilotheca, Bolitheca, Brevitheca, Bucanotheca, Carinitheca, Chelsonella, Cupitheca, Curtitheca, Ebianotheca, Eogloborilus, Eonovitatus, Girvanolithes, Gracilithecidae, Grandicornus, Hexitheca, Inflaticornus, Isititheca, Khetatheca, Kotuyitheca, Lophotheca, Minitheca, Mooritheca, Neobactrotheca, Nikatheca, Novitatidae, Orthothecidae, Panitheca, Paragloborilus, Petasotheca, Plicitheca, Probactrotheca, Renitheca, Sysoievia, Tchuranitheca, Tetratheca, Tetrathecidae, Triplicatellidae, Turcutheca

Subtaxa: Circotheca Conotheca Crossbitheca Guduguwan Laratheca Larawa

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Ecology: stationary epifaunal suspension feeder

Distribution:

• Ordovician of the Czech Republic (1 collection), Sweden (1)

• Cambrian of Antarctica (1), Australia (40), Canada (12: New Brunswick, Nova Scotia, Nunavut, Quebec), China (137), Germany (1), Greenland (13), India (5), Iran (3), Kazakhstan (9), Mexico (1), Mongolia (1), Morocco (1), the Russian Federation (32), Turkey (1), the United Kingdom (3), United States (9: Massachusetts, New York, Pennsylvania)

Total: 271 collections including 365 occurrences

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