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Vagrania
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Atrypida
Superfamily:
Palaferelloidea
Family:
Karpinskiidae
Formal Genus Name and Reference:
Vagrania Alekseeva, 1959, p. 389, Totia Rzhonsnitskaia & MIZENS, 1977, p. 20
Type Species:
Atrypa kolymensis NALIVKIN, 1936, p. 17, OD
Images
(Click to enlarge in a new window)
Fig. 986, 1a-e. *V. kolymensis (Nalivkin), upper Emsian, ?lower Eifelian, Kolyma, northeastern Siberia, $a-d$, dorsal, ventral, anterior, lateral views, x1, e$, serial section, x2$ (Rzhonsnitskaia & Mizens, 1977).
Synonyms
Geographic Distribution
Europe, Urals, arctic Canada, southern China
Age Range
Beginning Stage in Treatise Usage:
Lower Devonian (Lochkovian)
Beginning International Stage:
Lochkovian
Fraction Up In Beginning Stage:
0
Beginning Date:
419
Ending Stage in Treatise Usage:
Middle Devonian (Eifelian)
Ending International Stage:
Eifelian
Fraction Up In Ending Stage:
100
Ending Date:
385.3
Description
Small to medium, rounded, biconvex, prominent apsacline-orthocline area, apical foramen, ribs medium to coarse, consistently spaced, bifurcating ventrally, intercalating dorsally, rectimarginate to weakly plicate commissure, large deltidial plates fused into collar, teeth with prominent dental cavities, strong ventral vascular ridges, hinge plate thick, crural bases, crura delicate, spiralia dorsomedial, fewer than 20 whorls, jugal processes terminating in jugal plates curving away from each other. [Distinguished from Mimatrypa by its convexity, bifurcating and intercalating coarser ribs, dental cavities; differs from Desatrypa by having dental cavities (dental plates), coarser ribs. Totia has been distinguished from Vagrania by its somewhat finer ribs and the presence of microornamental tubercles, but these characters appear to be variable.]
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Atrypida
Superfamily:
Palaferelloidea
Family:
Karpinskiidae
Formal Genus Name and Reference:
Vagrania Alekseeva, 1959, p. 389, Totia Rzhonsnitskaia & MIZENS, 1977, p. 20
Type Species:
Atrypa kolymensis NALIVKIN, 1936, p. 17, OD
Images
(Click to enlarge in a new window)
Fig. 986, 1a-e. *V. kolymensis (Nalivkin), upper Emsian, ?lower Eifelian, Kolyma, northeastern Siberia, $a-d$, dorsal, ventral, anterior, lateral views, x1, e$, serial section, x2$ (Rzhonsnitskaia & Mizens, 1977).
Synonyms
Geographic Distribution
Europe, Urals, arctic Canada, southern China
Age Range
Beginning Stage in Treatise Usage:
Lower Devonian (Lochkovian)
Beginning International Stage:
Lochkovian
Fraction Up In Beginning Stage:
0
Beginning Date:
419
Ending Stage in Treatise Usage:
Middle Devonian (Eifelian)
Ending International Stage:
Eifelian
Fraction Up In Ending Stage:
100
Ending Date:
385.3
Description
Small to medium, rounded, biconvex, prominent apsacline-orthocline area, apical foramen, ribs medium to coarse, consistently spaced, bifurcating ventrally, intercalating dorsally, rectimarginate to weakly plicate commissure, large deltidial plates fused into collar, teeth with prominent dental cavities, strong ventral vascular ridges, hinge plate thick, crural bases, crura delicate, spiralia dorsomedial, fewer than 20 whorls, jugal processes terminating in jugal plates curving away from each other. [Distinguished from Mimatrypa by its convexity, bifurcating and intercalating coarser ribs, dental cavities; differs from Desatrypa by having dental cavities (dental plates), coarser ribs. Totia has been distinguished from Vagrania by its somewhat finer ribs and the presence of microornamental tubercles, but these characters appear to be variable.]