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Dirafinesquina
Classification
Phylum:
Brachiopoda
Subphylum:
Rhynchonelliformea
Class:
Strophomenata
Order:
Strophomenida
Superfamily:
Strophomenoidea
Family:
Rafinesquinidae
Subfamily:
Rafinesquininae
Formal Genus Name and Reference:
Dirafinesquina Cocks & ZHAN, 1998, p. 125
Type Species:
D. globosa, OD
Images
(Click to enlarge in a new window)
Fig. 1727, 3a-d. *D globosa, Naungkangyi Group, lower Caradoc, Linwe, Shan States, Myamnar, Burma, a, lateral view of ventral internal mold, BMNH BB37607, x1.5, b-c, dorsal and posterior views of ventral internal mold, BMNH BB37619, x2, d, holotype, latex cast of dorsal interior, BMNH BB37593, ×5 (Cocks & Zhan, 1998).
Synonyms
Geographic Distribution
Southeast Asia
Age Range
Beginning Stage in Treatise Usage:
Ordovician (Darriwilian)
Beginning International Stage:
Darriwilian
Fraction Up In Beginning Stage:
0
Beginning Date:
469.42
Ending Stage in Treatise Usage:
Ordovician (Caradoc)
Ending International Stage:
Katian
Fraction Up In Ending Stage:
66.7
Ending Date:
447.72
Description
Strongly convex ventral profile, gently concave and geniculate dorsal profile, semicircular outline, ventral bounding ridges surrounding a suboval and bilobed muscle field, cardinal process lobes variably developed from ponderous to weak but erect rather than anteriorly directed, low, short, straight, but variably thick socket ridges flaring laterally and separate from cardinal process, circular dorsal muscle field, low wide myophragm starting from notothyrial platform and narrowing anteriorly, mantle canals unknown. Ordovician (Darriwilian-Caradoc): Southeast Asia.
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Subphylum:
Rhynchonelliformea
Class:
Strophomenata
Order:
Strophomenida
Superfamily:
Strophomenoidea
Family:
Rafinesquinidae
Subfamily:
Rafinesquininae
Formal Genus Name and Reference:
Dirafinesquina Cocks & ZHAN, 1998, p. 125
Type Species:
D. globosa, OD
Images
(Click to enlarge in a new window)
Fig. 1727, 3a-d. *D globosa, Naungkangyi Group, lower Caradoc, Linwe, Shan States, Myamnar, Burma, a, lateral view of ventral internal mold, BMNH BB37607, x1.5, b-c, dorsal and posterior views of ventral internal mold, BMNH BB37619, x2, d, holotype, latex cast of dorsal interior, BMNH BB37593, ×5 (Cocks & Zhan, 1998).
Synonyms
Geographic Distribution
Southeast Asia
Age Range
Beginning Stage in Treatise Usage:
Ordovician (Darriwilian)
Beginning International Stage:
Darriwilian
Fraction Up In Beginning Stage:
0
Beginning Date:
469.42
Ending Stage in Treatise Usage:
Ordovician (Caradoc)
Ending International Stage:
Katian
Fraction Up In Ending Stage:
66.7
Ending Date:
447.72
Description
Strongly convex ventral profile, gently concave and geniculate dorsal profile, semicircular outline, ventral bounding ridges surrounding a suboval and bilobed muscle field, cardinal process lobes variably developed from ponderous to weak but erect rather than anteriorly directed, low, short, straight, but variably thick socket ridges flaring laterally and separate from cardinal process, circular dorsal muscle field, low wide myophragm starting from notothyrial platform and narrowing anteriorly, mantle canals unknown. Ordovician (Darriwilian-Caradoc): Southeast Asia.