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Aegiria
Classification
Phylum:
Brachiopoda
Class:
Strophomenata
Order:
Strophomenida
Superfamily:
Plectambonitoidea
Family:
Xenambonitidae
Formal Genus Name and Reference:
Aegiria ÖPIK, 1933a, p. 55
Type Species:
A. norvegica, OD
Images
(Click to enlarge in a new window)
Fig. 218, 3a–e. *A. norvegica, Solvik Formation, Rhuddanian, Leangen, Asker, Norway; a–c, ventral, dorsal, lateral views of conjoined valves, PMO 40690, ×4; d, ventral internal mold, PMO 40689, × 4; e, dorsal internal mold, PMO 40688, × 4 (new).——Fig. 218, 3f,g. A. tristis, Králuv Dvur Formation, lower–middle Ashgill, Jezerka, Michli, Prague, Czech Republic; f, ventral internal mold, ×7; g, dorsal internal mold, ×7 (Mergl, new).
Synonyms
Aegironetes
Geographic Distribution
Europe, China
Age Range
Beginning Stage in Treatise Usage:
Ordovician (Ashgill)
Beginning International Stage:
Katian
Fraction Up In Beginning Stage:
66.7
Beginning Date:
447.72
Ending Stage in Treatise Usage:
Silurian (Llandovery)
Ending International Stage:
Telychian
Fraction Up In Ending Stage:
100
Ending Date:
432.93
Description
Gently concavoconvex profile; parvicostellate ornament; delthyrium closed by large pseudodeltidium, chilidium; relatively short, variably impressed, bilobed ventral muscle field; erect cardinal process; differs from Mezounia in relatively transverse bema, not bilobed anteriorly; bema always present; short central median septum transecting anterior end of bema; platform sometimes indicated merely by elongate pseudopunctae.
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Strophomenata
Order:
Strophomenida
Superfamily:
Plectambonitoidea
Family:
Xenambonitidae
Formal Genus Name and Reference:
Aegiria ÖPIK, 1933a, p. 55
Type Species:
A. norvegica, OD
Images
(Click to enlarge in a new window)
Fig. 218, 3a–e. *A. norvegica, Solvik Formation, Rhuddanian, Leangen, Asker, Norway; a–c, ventral, dorsal, lateral views of conjoined valves, PMO 40690, ×4; d, ventral internal mold, PMO 40689, × 4; e, dorsal internal mold, PMO 40688, × 4 (new).——Fig. 218, 3f,g. A. tristis, Králuv Dvur Formation, lower–middle Ashgill, Jezerka, Michli, Prague, Czech Republic; f, ventral internal mold, ×7; g, dorsal internal mold, ×7 (Mergl, new).
Synonyms
Aegironetes
Geographic Distribution
Europe, China
Age Range
Beginning Stage in Treatise Usage:
Ordovician (Ashgill)
Beginning International Stage:
Katian
Fraction Up In Beginning Stage:
66.7
Beginning Date:
447.72
Ending Stage in Treatise Usage:
Silurian (Llandovery)
Ending International Stage:
Telychian
Fraction Up In Ending Stage:
100
Ending Date:
432.93
Description
Gently concavoconvex profile; parvicostellate ornament; delthyrium closed by large pseudodeltidium, chilidium; relatively short, variably impressed, bilobed ventral muscle field; erect cardinal process; differs from Mezounia in relatively transverse bema, not bilobed anteriorly; bema always present; short central median septum transecting anterior end of bema; platform sometimes indicated merely by elongate pseudopunctae.