Full reference: L. Marek. 1966. New hyolithid genera from the Ordovician of Bohemia. Casopis Narodního Musea, oddíl prírodovedny 135:89-92
Parent taxon: Hyolitha according to J.M. Malinky and P.R. Racheboeuf 2011
See also Azmi and Pancholi 1983 and Sepkoski 2002
Sister taxa: Attenuella, Hyolithida, Hyolithomorpha, Orthothecimorpha
Subtaxa: Aldanotheca Allathecidae Ancheilotheca Bolitheca Brevitheca Bucanotheca Carinitheca Chelsonella Circothecidae Curtitheca Devoniotheca Ebianotheca Eogloborilus Eonovitatus Girvanolithes Gracilithecidae Grandicornus Hexitheca Inflaticornus Isititheca Lophotheca Malykanotheca Minitheca Mooritheca Neobactrotheca Nephrotheca Nikatheca Novitatidae Novitatus Orthothecidae Panitheca Petasotheca Plicitheca Probactrotheca Renitheca Tcharatheca Tchuranitheca Tetratheca Tetrathecidae Triplicatellidae
Ecology: stationary epifaunal suspension feeder
Distribution:
• Devonian of Australia (1 collection), the Czech Republic (1), Germany (1), Morocco (9), South Africa (5), United States (1: Pennsylvania)
• Silurian of Australia (1), the Czech Republic (1)
• Ordovician of Argentina (1), China (1), the Czech Republic (3), France (2), Morocco (3), Spain (1), Sweden (2), the United Kingdom (11)
• Llandeilo of China (1)
• Arenig of Argentina (1)
• Marjumian of Greenland (1), United States (1: Vermont)
• Cambrian of Antarctica (2), Australia (57), Canada (20: New Brunswick, Newfoundland and Labrador, Nova Scotia, Nunavut, Quebec), China (167), Germany (8), Greenland (28), India (5), Iran (3), Kazakhstan (10), Kyrgyzstan (1), Mexico (4), Mongolia (2), Morocco (2), Norway (1), the Russian Federation (64), Spain (1), Sweden (4), Turkey (1), the United Kingdom (7), United States (19: Idaho, Massachusetts, Montana, New York, Pennsylvania, Texas)
Total: 454 collections including 821 occurrences