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Orientospirifer
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Spiriferida
Superfamily:
Delthyriodoidea
Family:
Delthyrididae
Formal Genus Name and Reference:
Orientospirifer Hou & XIAN, 1975, p. 49
Type Species:
Eospiriferina nakaolingensis HOU, 1959b, p. 452, OD
Images
(Click to enlarge in a new window)
Fig. 1212, 5a-d. *O. nakaolingensis (Hou), Pragian, southern China, ventral, dorsal, anterior, and side views, X1.5 (Hou & Xian, 1975).
Synonyms
Geographic Distribution
southern China, northern Vietnam
Age Range
Beginning Stage in Treatise Usage:
Lower Devonian (Pragian)
Beginning International Stage:
Pragian
Fraction Up In Beginning Stage:
0
Beginning Date:
412.4
Ending Stage in Treatise Usage:
Lower Devonian (Emsian)
Ending International Stage:
Emsian
Fraction Up In Ending Stage:
100
Ending Date:
394.3
Description
Small, transverse with rounded cardinal angles, ventral interarea low, apsacline, fold and sulcus smooth, lateral plications simple, subrounded, microornament of irregular spines and closely spaced concentric lamellae, prominent anteriorly, well-developed, divergent dental plates, ctenophoridium present, crural plates absent.
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Spiriferida
Superfamily:
Delthyriodoidea
Family:
Delthyrididae
Formal Genus Name and Reference:
Orientospirifer Hou & XIAN, 1975, p. 49
Type Species:
Eospiriferina nakaolingensis HOU, 1959b, p. 452, OD
Images
(Click to enlarge in a new window)
Fig. 1212, 5a-d. *O. nakaolingensis (Hou), Pragian, southern China, ventral, dorsal, anterior, and side views, X1.5 (Hou & Xian, 1975).
Synonyms
Geographic Distribution
southern China, northern Vietnam
Age Range
Beginning Stage in Treatise Usage:
Lower Devonian (Pragian)
Beginning International Stage:
Pragian
Fraction Up In Beginning Stage:
0
Beginning Date:
412.4
Ending Stage in Treatise Usage:
Lower Devonian (Emsian)
Ending International Stage:
Emsian
Fraction Up In Ending Stage:
100
Ending Date:
394.3
Description
Small, transverse with rounded cardinal angles, ventral interarea low, apsacline, fold and sulcus smooth, lateral plications simple, subrounded, microornament of irregular spines and closely spaced concentric lamellae, prominent anteriorly, well-developed, divergent dental plates, ctenophoridium present, crural plates absent.