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Burmirhynchia
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Rhynchonellida
Superfamily:
Hemithiridoidea
Family:
Tetrarhynchiidae
Formal Genus Name and Reference:
Burmirhynchia BUCKMAN, 1918, p. 49
Type Species:
B. gutta, OD
Images
(Click to enlarge in a new window)
Fig. 919, 1a–k. *B. (B.) gutta, Bathonian, northern Shan States, Myanmar; ac, topotype, dorsal, lateral, anterior views, USNM 123602, ×1; d–k, topotype, transverse serial sections, distances in mm from ventral umbo, 1.9, 2.2, 2.4, 2.7, 3.0, 3.5, 4.0, 4.7, USNM 123602 (Shi & Grant, 1993).
Synonyms
Geographic Distribution
Europe, Africa, Asia, ?Australasia
Age Range
Beginning Stage in Treatise Usage:
Middle Jurassic (?Bajocian, Bathonian)
Beginning International Stage:
Bajocian
Fraction Up In Beginning Stage:
0
Beginning Date:
170.9
Ending Stage in Treatise Usage:
Middle Jurassic (Callovian)
Ending International Stage:
Callovian
Fraction Up In Ending Stage:
100
Ending Date:
161.53
Description
Small to medium, globose, equibiconvex to dorsibiconvex, thickest at midvalve, convex anteriorly, uniplication distinct, but dorsal fold indistinct to gently prominent, linguiform extension always neat, deflected dorsally, costae numerous, simple, smooth posterior area not present, beak massive, incurved to suberect, sub- dued beak ridges, foramen small, hypothyrid, deltidial plates disjunct to barely conjunct. Dental plates ventrally divergent, dorsal median septum strong, septalium variable, crura slender, strongly incurved, raduliform.
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Rhynchonellida
Superfamily:
Hemithiridoidea
Family:
Tetrarhynchiidae
Formal Genus Name and Reference:
Burmirhynchia BUCKMAN, 1918, p. 49
Type Species:
B. gutta, OD
Images
(Click to enlarge in a new window)
Fig. 919, 1a–k. *B. (B.) gutta, Bathonian, northern Shan States, Myanmar; ac, topotype, dorsal, lateral, anterior views, USNM 123602, ×1; d–k, topotype, transverse serial sections, distances in mm from ventral umbo, 1.9, 2.2, 2.4, 2.7, 3.0, 3.5, 4.0, 4.7, USNM 123602 (Shi & Grant, 1993).
Synonyms
Geographic Distribution
Europe, Africa, Asia, ?Australasia
Age Range
Beginning Stage in Treatise Usage:
Middle Jurassic (?Bajocian, Bathonian)
Beginning International Stage:
Bajocian
Fraction Up In Beginning Stage:
0
Beginning Date:
170.9
Ending Stage in Treatise Usage:
Middle Jurassic (Callovian)
Ending International Stage:
Callovian
Fraction Up In Ending Stage:
100
Ending Date:
161.53
Description
Small to medium, globose, equibiconvex to dorsibiconvex, thickest at midvalve, convex anteriorly, uniplication distinct, but dorsal fold indistinct to gently prominent, linguiform extension always neat, deflected dorsally, costae numerous, simple, smooth posterior area not present, beak massive, incurved to suberect, sub- dued beak ridges, foramen small, hypothyrid, deltidial plates disjunct to barely conjunct. Dental plates ventrally divergent, dorsal median septum strong, septalium variable, crura slender, strongly incurved, raduliform.