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Cymostrophia
Classification
Phylum:
Brachiopoda
Class:
Strophomenata
Order:
Strophomenida
Superfamily:
Strophomenoidea
Family:
Douvillinidae
Formal Genus Name and Reference:
Cymostrophia Caster, 1939, p. 39
Type Species:
Leptaena stephani BARRANDE, 1848, p. 230, OD
Images
(Click to enlarge in a new window)
Fig. 168,3a–c. *C. (C.) stephani (BARRANDE), Koneprusy Limestone, Pragian, Koneprusy, Bohemia, Czech Republic; a, ventral exterior, NM CF382, × 1 (Havlícek, ˇ 1967); b, ventral interior, BMNH BC 13007, ×1.5 (new); c, dorsal interior, OMR VH 398a, ×1 (Havlícek, 1967).
Synonyms
Corrugatella
Geographic Distribution
cosmopolitan
Age Range
Beginning Stage in Treatise Usage:
Silurian (Ludlow)
Beginning International Stage:
Gorstian
Fraction Up In Beginning Stage:
0
Beginning Date:
426.74
Ending Stage in Treatise Usage:
Devonian (Givetian)
Ending International Stage:
Givetian
Fraction Up In Ending Stage:
100
Ending Date:
378.9
Description
Variable outline, variably convex profile, geniculate ventral valve, dorsal valve initially flat, geniculate anteriorly, distinctive ornament of rugae interrupted by primary costellae, relatively large, suboval ventral muscle field bounded by low ridges posterolaterally only, ventral myophragm developed, small, erect cardinal process lobes, dorsal muscle field bounded posterolaterally by low ridges, one pair of low dorsal side septa, small median ridge in valve center.
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Strophomenata
Order:
Strophomenida
Superfamily:
Strophomenoidea
Family:
Douvillinidae
Formal Genus Name and Reference:
Cymostrophia Caster, 1939, p. 39
Type Species:
Leptaena stephani BARRANDE, 1848, p. 230, OD
Images
(Click to enlarge in a new window)
Fig. 168,3a–c. *C. (C.) stephani (BARRANDE), Koneprusy Limestone, Pragian, Koneprusy, Bohemia, Czech Republic; a, ventral exterior, NM CF382, × 1 (Havlícek, ˇ 1967); b, ventral interior, BMNH BC 13007, ×1.5 (new); c, dorsal interior, OMR VH 398a, ×1 (Havlícek, 1967).
Synonyms
Corrugatella
Geographic Distribution
cosmopolitan
Age Range
Beginning Stage in Treatise Usage:
Silurian (Ludlow)
Beginning International Stage:
Gorstian
Fraction Up In Beginning Stage:
0
Beginning Date:
426.74
Ending Stage in Treatise Usage:
Devonian (Givetian)
Ending International Stage:
Givetian
Fraction Up In Ending Stage:
100
Ending Date:
378.9
Description
Variable outline, variably convex profile, geniculate ventral valve, dorsal valve initially flat, geniculate anteriorly, distinctive ornament of rugae interrupted by primary costellae, relatively large, suboval ventral muscle field bounded by low ridges posterolaterally only, ventral myophragm developed, small, erect cardinal process lobes, dorsal muscle field bounded posterolaterally by low ridges, one pair of low dorsal side septa, small median ridge in valve center.