Class Hyolitha Marek, 1963

et: hüoliidid;

Taxon ID: 267 / 2013-04-16
Belongs to: Mollusca
Sister taxa: Bivalvia | Diplacophora | Gastropoda | Helcionelloida | Paragastropoda | Rostroconchia | Tergomya | Cephalopoda
Contains: Circothecidae | Hyolithida | Novitatidae | Orthothecida
Stratigraphic range: Cambrian
Baltoscandian species (in database): 31

List of Baltoscandian species (may not be complete, up to 1000 species displayed)

  1. Bactrotheca dens | Uhaku Stage
  2. Bactrotheca quadrangularis | Ordovician
  3. Carinolithes hospes | Middle Cambrian (old nomenclature) → Lasnamägi Stage
  4. Carinolithes pennatulus | Middle Cambrian (old nomenclature)
  5. Carinolithes triumvir | Kunda Stage
  6. Circotheca stylus | Cambrian
  7. Crispatella crispata | Kunda Stage → Lasnamägi Stage
  8. Dorsolinevitus dispar | Aseri Stage → Lasnamägi Stage
  9. Dorsolinevitus esthonus |
  10. Dorsolinevitus marri | Kunda Stage
  11. Dorsolinevitus scalprum | Ordovician
  12. Dorsolinevitus striatus | Kukruse Stage
  13. Dorsolinevitus textilis | Kunda Stage
  14. Dorsolinevitus vomer | Kunda Stage
  15. Hexitheca teretisulcula |
  16. Hyolithes acutus | Aseri Stage → Uhaku Stage
  17. Hyolithes bisulcatus | Volkhov Stage → Kunda Stage
  18. Hyolithes burgessi | Kukruse Stage
  19. Hyolithes concinnus | Lasnamägi Stage → Uhaku Stage
  20. Hyolithes gerhardi | Aseri Stage → Kukruse Stage
  21. Hyolithes innotatus | Lasnamägi Stage → Uhaku Stage
  22. Hyolithes latissiumus | Nabala Stage
  23. Hyolithes latus | Lasnamägi Stage → Uhaku Stage
  24. Hyolithes mickwitzi | Lower Cambrian (old nomenclature)
  25. Hyolithes nathorsti | Lower Cambrian (old nomenclature)
  26. Quadrotheca quadrangularis | Kunda Stage
  27. Semielliptotheca rosmara | Kunda Stage
  28. Stelterella cymbium | Lasnamägi Stage
  29. Sulcavitus caelatus | Kunda Stage
  30. Trapezotheca aemula | Kunda Stage
  31. Trapezotheca dens | Kunda Stage

Taxon overview

The orthothecid shell has an internal layer with a microstructure of transverse bundles, and an external layer comprising longitudinal bundles

Selection of related publications

  • Dies Álvarez et al., 2008. Bradoriid arthropods from the lower-middle Cambrian of Scania, Sweden
  • Malinky, 2006. Revision of Hyolitha from the Ordovician of Estonia
  • Malinky, 2003. New Middle and Late Ordovician hyoliths from Estonia
  • Malinky, 2002. A revision of Early to Mid Ordovician Hyoliths from Sweden [DOI]
  • Dzik, 1980. Ontogeny of Bactrotheca and related hyoliths
  • Jankauskas & Posti, 1973. Micropaleontological characteristic of the stratotype sections of the Estonian Lower Cambrian
  • Öpik, 1926. Über den estländischen Blauen Ton
  • Koken, 1889. Ueber die Entwicklung der Gastropoden vom Cambrium bis zur Trias
  • Eichwald, 1856. Beitrag zur geographischen Verbreitung der fossilen Thiere Russlands. Alte Periode