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Discomyorthis
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Orthida
Superfamily:
Dalmanelloidea
Family:
Rhipidomellidae
Formal Genus Name and Reference:
Discomyorthis JOHNSON, 1970a, p. 84
Type Species:
Orthis musculosa HALL, 1857, p. 46, OD
Images
(Click to enlarge in a new window)
Fig. 595, 5a-d. *D. musculosa (Hall), Pragian, Nevada, posterior, lateral, external, internal views of ventral valve, X 1 (Johnson, 1970a).
Synonyms
Geographic Distribution
western USA
Age Range
Beginning Stage in Treatise Usage:
Lower Devonian (Pragian)
Beginning International Stage:
Pragian
Fraction Up In Beginning Stage:
0
Beginning Date:
412.4
Ending Stage in Treatise Usage:
Lower Devonian (Pragian)
Ending International Stage:
Pragian
Fraction Up In Ending Stage:
100
Ending Date:
410.51
Description
"Convexiplane, resupinate, large valves internally similar to Dalejina but ventral interior with very large, pentagonal diductor scars with scalloped margins."
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Orthida
Superfamily:
Dalmanelloidea
Family:
Rhipidomellidae
Formal Genus Name and Reference:
Discomyorthis JOHNSON, 1970a, p. 84
Type Species:
Orthis musculosa HALL, 1857, p. 46, OD
Images
(Click to enlarge in a new window)
Fig. 595, 5a-d. *D. musculosa (Hall), Pragian, Nevada, posterior, lateral, external, internal views of ventral valve, X 1 (Johnson, 1970a).
Synonyms
Geographic Distribution
western USA
Age Range
Beginning Stage in Treatise Usage:
Lower Devonian (Pragian)
Beginning International Stage:
Pragian
Fraction Up In Beginning Stage:
0
Beginning Date:
412.4
Ending Stage in Treatise Usage:
Lower Devonian (Pragian)
Ending International Stage:
Pragian
Fraction Up In Ending Stage:
100
Ending Date:
410.51
Description
"Convexiplane, resupinate, large valves internally similar to Dalejina but ventral interior with very large, pentagonal diductor scars with scalloped margins."