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Spirelytha
Classification
Phylum:
Brachiopoda
Subphylum:
Rhynchonelliformea
Class:
Rhynchonellata
Order:
Spiriferida
Suborder:
Delthyridina
Superfamily:
Reticularioidea
Family:
Elythidae
Subfamily:
Toryniferinae
Formal Genus Name and Reference:
Spirelytha Frederiks, 1924, p. 304
Type Species:
S. pavlovae Archbold & Thomas, 1984a, p. 313, OD, nom. nov. pro Spirifer scheii Chernyshev in Chernyshev & Stepanov, 1916b, p. 45, non MEYER, 1913
Images
(Click to enlarge in a new window)
Fig. 1244, 5a-c. * S. pavlovae Archbold & Thomas, Arctic Siberia, lectotype, ventral, lateral, and posterior views, X1 (Chernyshev & Stepanov, 1916b).
Synonyms
Geographic Distribution
Arctic
Age Range
Beginning Stage in Treatise Usage:
Permian
Beginning International Stage:
Asselian
Fraction Up In Beginning Stage:
0
Beginning Date:
298.89
Ending Stage in Treatise Usage:
Permian
Ending International Stage:
Changhsingian
Fraction Up In Ending Stage:
100
Ending Date:
251.9
Description
Fold and sulcus variably developed, lateral slopes lacking plications, ventral interior with dental adminicula and median ridge, dorsal interior with delicate myophragm, adminicula absent or weakly developed, otherwise similar to Torynifer.
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Subphylum:
Rhynchonelliformea
Class:
Rhynchonellata
Order:
Spiriferida
Suborder:
Delthyridina
Superfamily:
Reticularioidea
Family:
Elythidae
Subfamily:
Toryniferinae
Formal Genus Name and Reference:
Spirelytha Frederiks, 1924, p. 304
Type Species:
S. pavlovae Archbold & Thomas, 1984a, p. 313, OD, nom. nov. pro Spirifer scheii Chernyshev in Chernyshev & Stepanov, 1916b, p. 45, non MEYER, 1913
Images
(Click to enlarge in a new window)
Fig. 1244, 5a-c. * S. pavlovae Archbold & Thomas, Arctic Siberia, lectotype, ventral, lateral, and posterior views, X1 (Chernyshev & Stepanov, 1916b).
Synonyms
Geographic Distribution
Arctic
Age Range
Beginning Stage in Treatise Usage:
Permian
Beginning International Stage:
Asselian
Fraction Up In Beginning Stage:
0
Beginning Date:
298.89
Ending Stage in Treatise Usage:
Permian
Ending International Stage:
Changhsingian
Fraction Up In Ending Stage:
100
Ending Date:
251.9
Description
Fold and sulcus variably developed, lateral slopes lacking plications, ventral interior with dental adminicula and median ridge, dorsal interior with delicate myophragm, adminicula absent or weakly developed, otherwise similar to Torynifer.