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Tritoechia
Classification
Phylum:
Brachiopoda
Subphylum:
Rhynchonelliformea
Class:
Strophomenata
Order:
Orthotetida
Suborder:
Clitambonitidina
Superfamily:
Polytoechioidea
Family:
Polytoechiidae
Formal Genus Name and Reference:
Tritoechia Ulrich & COOPER, 1936b, p. 624
Type Species:
Deltatreta typica Schuchert & COOPER, 1932, p. 206, OD
Images
(Click to enlarge in a new window)
Fig. 512, 1a-e. * T. typica (Schuchert & Cooper), Arenig, Oklahoma, a, ventral valve exterior, X1, b, dorsal valve exterior, X2, c, d, dorsal, anterodorsal views of ventral interior, X1, e, dorsal valve interior, X2 (Ulrich & Cooper, 1938).
Synonyms
Geographic Distribution
widespread
Age Range
Beginning Stage in Treatise Usage:
Lower Ordovician (Tremadoc)
Beginning International Stage:
Tremadocian
Fraction Up In Beginning Stage:
0
Beginning Date:
486.85
Ending Stage in Treatise Usage:
Lower Ordovician (Arenig)
Ending International Stage:
Floian
Fraction Up In Ending Stage:
100
Ending Date:
471.26
Description
Ventribiconvex, with pronounced aditicules, prominent median ridge extending in front of ventral muscle field, chilidial plates present, cardinal process swollen. [The so-called tubular spines that are diagnostic of Pinatotoechia (Benedetto, 2001, fig. 3B) are identical with the aditicules characterizing the type species of Tritoechia.]
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Subphylum:
Rhynchonelliformea
Class:
Strophomenata
Order:
Orthotetida
Suborder:
Clitambonitidina
Superfamily:
Polytoechioidea
Family:
Polytoechiidae
Formal Genus Name and Reference:
Tritoechia Ulrich & COOPER, 1936b, p. 624
Type Species:
Deltatreta typica Schuchert & COOPER, 1932, p. 206, OD
Images
(Click to enlarge in a new window)
Fig. 512, 1a-e. * T. typica (Schuchert & Cooper), Arenig, Oklahoma, a, ventral valve exterior, X1, b, dorsal valve exterior, X2, c, d, dorsal, anterodorsal views of ventral interior, X1, e, dorsal valve interior, X2 (Ulrich & Cooper, 1938).
Synonyms
Geographic Distribution
widespread
Age Range
Beginning Stage in Treatise Usage:
Lower Ordovician (Tremadoc)
Beginning International Stage:
Tremadocian
Fraction Up In Beginning Stage:
0
Beginning Date:
486.85
Ending Stage in Treatise Usage:
Lower Ordovician (Arenig)
Ending International Stage:
Floian
Fraction Up In Ending Stage:
100
Ending Date:
471.26
Description
Ventribiconvex, with pronounced aditicules, prominent median ridge extending in front of ventral muscle field, chilidial plates present, cardinal process swollen. [The so-called tubular spines that are diagnostic of Pinatotoechia (Benedetto, 2001, fig. 3B) are identical with the aditicules characterizing the type species of Tritoechia.]