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Triplesia
Classification
Phylum:
Brachiopoda
Class:
Strophomenata
Order:
Triplesiidina
Superfamily:
Triplesioidea
Family:
Triplesiidae
Formal Genus Name and Reference:
Triplesia HALL, 1859b, p. 44
Type Species:
Atrypa extans Emmons, 1842, p. 395, SD Hall & CLARKE, 1892, p. 270
Images
(Click to enlarge in a new window)
Fig. 494, $1 a-e .*$ T. extans (Emmons), Caradoc, Trenton, New York, ventral, dorsal, posterior, anterior, lateral views of complete shell, x1.5$ (Wright, 1965b), Fig. 494, 1f, g. T. sp., Ashgill, Norway, anterolateral, posterodorsal views of silicified hinge regions, $\\times_{8}$ (new)
Synonyms
Triplecia, Dicraniscus
Geographic Distribution
widespread in North America, Eurasia, Morocco
Age Range
Beginning Stage in Treatise Usage:
Lower Ordovician (upper Llanvirn)
Beginning International Stage:
Darriwilian
Fraction Up In Beginning Stage:
30
Beginning Date:
466.05
Ending Stage in Treatise Usage:
lower Silurian (upper Llandovery)
Ending International Stage:
Telychian
Fraction Up In Ending Stage:
100
Ending Date:
432.93
Description
Strongly trilobate with pronounced dorsal fold and ventral sulcus, surface smooth, with only faint growth lines, cardinal process keeled, cowl present
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Strophomenata
Order:
Triplesiidina
Superfamily:
Triplesioidea
Family:
Triplesiidae
Formal Genus Name and Reference:
Triplesia HALL, 1859b, p. 44
Type Species:
Atrypa extans Emmons, 1842, p. 395, SD Hall & CLARKE, 1892, p. 270
Images
(Click to enlarge in a new window)
Fig. 494, $1 a-e .*$ T. extans (Emmons), Caradoc, Trenton, New York, ventral, dorsal, posterior, anterior, lateral views of complete shell, x1.5$ (Wright, 1965b), Fig. 494, 1f, g. T. sp., Ashgill, Norway, anterolateral, posterodorsal views of silicified hinge regions, $\\times_{8}$ (new)
Synonyms
Triplecia, Dicraniscus
Geographic Distribution
widespread in North America, Eurasia, Morocco
Age Range
Beginning Stage in Treatise Usage:
Lower Ordovician (upper Llanvirn)
Beginning International Stage:
Darriwilian
Fraction Up In Beginning Stage:
30
Beginning Date:
466.05
Ending Stage in Treatise Usage:
lower Silurian (upper Llandovery)
Ending International Stage:
Telychian
Fraction Up In Ending Stage:
100
Ending Date:
432.93
Description
Strongly trilobate with pronounced dorsal fold and ventral sulcus, surface smooth, with only faint growth lines, cardinal process keeled, cowl present