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Obolus
Classification
Phylum:
Brachiopoda
Class:
Lingulata
Order:
Lingulida
Superfamily:
Linguloidea
Family:
Obolidae
Formal Genus Name and Reference:
Obolus labradoricus BILLINGS, 1861a, p. 6
Type Species:
Obolus labradoricus BILLINGS, 1861a, p. 6, OD
Images
(Click to enlarge in a new window)
Fig. 83, $1 a-d .* P$. labradorica (Billings), Newfoundland, Canada, $a$, ventral valve exterior, normal view, $X_{4}, b$, syntype, ventral valve exterior, detail of ornament, GSC 381, $X_{12}, c$, ventral valve exterior, normal view, $X_{4}, d$, syntype, ventral valve exterior, detail of ornament, GSC 381a, X12 (new).
Synonyms
Geographic Distribution
Russia (Ingria), Estonia
Age Range
Beginning Stage in Treatise Usage:
Middle Cambrian
Beginning International Stage:
Wuliuan
Fraction Up In Beginning Stage:
0
Beginning Date:
509
Ending Stage in Treatise Usage:
Ordovician (Tremadoc)
Ending International Stage:
Tremadocian
Fraction Up In Ending Stage:
100
Ending Date:
477.08
Description
Transversely ovate to subquadrate, ventribiconvex, hinge line nearly straight, ventral pseudointerarea variably defined, high, apsacline or catacline, homeodeltidium unknown, dorsal pseudointerarea low, ?catacline, homeochilidium unknown, ornament of irregular, fine, concentric fila, commonly broken by nick points into sets of drapes. Upper Lower Cambrian-Middle Cambrian: England, France, Spain, USA, Canada (Newfoundland), upper Lower Cambrian, Siberia, Middle Cambrian.
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Lingulata
Order:
Lingulida
Superfamily:
Linguloidea
Family:
Obolidae
Formal Genus Name and Reference:
Obolus labradoricus BILLINGS, 1861a, p. 6
Type Species:
Obolus labradoricus BILLINGS, 1861a, p. 6, OD
Images
(Click to enlarge in a new window)
Fig. 83, $1 a-d .* P$. labradorica (Billings), Newfoundland, Canada, $a$, ventral valve exterior, normal view, $X_{4}, b$, syntype, ventral valve exterior, detail of ornament, GSC 381, $X_{12}, c$, ventral valve exterior, normal view, $X_{4}, d$, syntype, ventral valve exterior, detail of ornament, GSC 381a, X12 (new).
Synonyms
Geographic Distribution
Russia (Ingria), Estonia
Age Range
Beginning Stage in Treatise Usage:
Middle Cambrian
Beginning International Stage:
Wuliuan
Fraction Up In Beginning Stage:
0
Beginning Date:
509
Ending Stage in Treatise Usage:
Ordovician (Tremadoc)
Ending International Stage:
Tremadocian
Fraction Up In Ending Stage:
100
Ending Date:
477.08
Description
Transversely ovate to subquadrate, ventribiconvex, hinge line nearly straight, ventral pseudointerarea variably defined, high, apsacline or catacline, homeodeltidium unknown, dorsal pseudointerarea low, ?catacline, homeochilidium unknown, ornament of irregular, fine, concentric fila, commonly broken by nick points into sets of drapes. Upper Lower Cambrian-Middle Cambrian: England, France, Spain, USA, Canada (Newfoundland), upper Lower Cambrian, Siberia, Middle Cambrian.