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Kallirhynchia
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Rhynchonellida
Superfamily:
Hemithiridoidea
Family:
Tetrarhynchiidae
Formal Genus Name and Reference:
Kallirhynchia BUCKMAN, 1918, p. 31
Type Species:
Rhynchonella concinna var. yaxleyensis DAVIDSON, 1878, p. 206, OD
Images
(Click to enlarge in a new window)
Fig. 921, 2a-j. *K$. yaxleyensis (Davidson), upper Bathonian, $a-c$, topotype, dorsal, lateral, anterior, Cambridgeshire, England, USNM 429303, x1$ (Shi & Grant, 1993), $d-j$, transverse serial sections, distances in mm from ventral umbo, 2.0, 2.2, 3.4, 4.2, 4.3, 4.4, 4.5, Lorraine, France (Laurin, 1984).
Synonyms
Geographic Distribution
England, France, ?Germany, ?Switzerland, ?Poland, ?Egypt, Saudi Arabia, ?Jordan, Pamirs, India, China, ?Japan, ?USA, Canada, ?Argentina
Age Range
Beginning Stage in Treatise Usage:
Middle Jurassic (Bajocian)
Beginning International Stage:
Bajocian
Fraction Up In Beginning Stage:
0
Beginning Date:
170.9
Ending Stage in Treatise Usage:
Middle Jurassic (Bathonian, ?Callovian)
Ending International Stage:
Callovian
Fraction Up In Ending Stage:
100
Ending Date:
161.53
Description
Medium size, globose, almost convexiplane, thickest anteriorly, subpentagonal, anteriorly flat to gently indented, uniplication prominent, subrectangular, but fold indistinct, linguiform extension shallowly concave, flattopped, strongly bent and rising above midheight, multicostate (24 to 32) after short posterior smooth stage (5 to 8 on fold), beak hypothyrid, suberect, deltidial plates disjunct or barely conjunct. Dorsal septum short, low, septalium almost sessile or pendant, crura long, allegedly calcariform to possibly falciform, in fact raduliform with concave distal ends.
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Rhynchonellida
Superfamily:
Hemithiridoidea
Family:
Tetrarhynchiidae
Formal Genus Name and Reference:
Kallirhynchia BUCKMAN, 1918, p. 31
Type Species:
Rhynchonella concinna var. yaxleyensis DAVIDSON, 1878, p. 206, OD
Images
(Click to enlarge in a new window)
Fig. 921, 2a-j. *K$. yaxleyensis (Davidson), upper Bathonian, $a-c$, topotype, dorsal, lateral, anterior, Cambridgeshire, England, USNM 429303, x1$ (Shi & Grant, 1993), $d-j$, transverse serial sections, distances in mm from ventral umbo, 2.0, 2.2, 3.4, 4.2, 4.3, 4.4, 4.5, Lorraine, France (Laurin, 1984).
Synonyms
Geographic Distribution
England, France, ?Germany, ?Switzerland, ?Poland, ?Egypt, Saudi Arabia, ?Jordan, Pamirs, India, China, ?Japan, ?USA, Canada, ?Argentina
Age Range
Beginning Stage in Treatise Usage:
Middle Jurassic (Bajocian)
Beginning International Stage:
Bajocian
Fraction Up In Beginning Stage:
0
Beginning Date:
170.9
Ending Stage in Treatise Usage:
Middle Jurassic (Bathonian, ?Callovian)
Ending International Stage:
Callovian
Fraction Up In Ending Stage:
100
Ending Date:
161.53
Description
Medium size, globose, almost convexiplane, thickest anteriorly, subpentagonal, anteriorly flat to gently indented, uniplication prominent, subrectangular, but fold indistinct, linguiform extension shallowly concave, flattopped, strongly bent and rising above midheight, multicostate (24 to 32) after short posterior smooth stage (5 to 8 on fold), beak hypothyrid, suberect, deltidial plates disjunct or barely conjunct. Dorsal septum short, low, septalium almost sessile or pendant, crura long, allegedly calcariform to possibly falciform, in fact raduliform with concave distal ends.