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Orthambonites
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Orthida
Superfamily:
Orthoidea
Family:
Orthidae
Formal Genus Name and Reference:
Orthambonites PANDER, 1830, p. 80
Type Species:
Orthis calligramma Dalman, 1828, p. 114, SD Jaanusson & Bassett, 1993, p. 24-26, =Orthambonites rotunda Pander, 1830, p. 82
Images
(Click to enlarge in a new window)
Fig. 524, 1a-f. *O. calligramma (Dalman), ArenigLlanvirn, $a-c$, dorsal, ventral, lateral views of conjoined valves, Russia, $\\mathbf{X}$, $d$, details of capillate ornament, Sweden, $X_{8}$, $e$, ventral interior, Sweden, X2, $f$, dorsal interior, Russia, x2$ (Jaanusson & Bassett, 1993).
Synonyms
Geographic Distribution
Baltoscandia, Russia
Age Range
Beginning Stage in Treatise Usage:
Lower Ordovician (Arenig)
Beginning International Stage:
Floian
Fraction Up In Beginning Stage:
0
Beginning Date:
477.08
Ending Stage in Treatise Usage:
Lower Ordovician (Llanvirn)
Ending International Stage:
Darriwilian
Fraction Up In Ending Stage:
56.9
Ending Date:
463.02
Description
Similar to Orthis but subcircular, ventribiconvex, strongly filate, less divergent brachiophores, and lacking ventral median ridge, pedicle callist preserved
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Orthida
Superfamily:
Orthoidea
Family:
Orthidae
Formal Genus Name and Reference:
Orthambonites PANDER, 1830, p. 80
Type Species:
Orthis calligramma Dalman, 1828, p. 114, SD Jaanusson & Bassett, 1993, p. 24-26, =Orthambonites rotunda Pander, 1830, p. 82
Images
(Click to enlarge in a new window)
Fig. 524, 1a-f. *O. calligramma (Dalman), ArenigLlanvirn, $a-c$, dorsal, ventral, lateral views of conjoined valves, Russia, $\\mathbf{X}$, $d$, details of capillate ornament, Sweden, $X_{8}$, $e$, ventral interior, Sweden, X2, $f$, dorsal interior, Russia, x2$ (Jaanusson & Bassett, 1993).
Synonyms
Geographic Distribution
Baltoscandia, Russia
Age Range
Beginning Stage in Treatise Usage:
Lower Ordovician (Arenig)
Beginning International Stage:
Floian
Fraction Up In Beginning Stage:
0
Beginning Date:
477.08
Ending Stage in Treatise Usage:
Lower Ordovician (Llanvirn)
Ending International Stage:
Darriwilian
Fraction Up In Ending Stage:
56.9
Ending Date:
463.02
Description
Similar to Orthis but subcircular, ventribiconvex, strongly filate, less divergent brachiophores, and lacking ventral median ridge, pedicle callist preserved