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Ilmenia
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Spiriferida
Superfamily:
Ambocoelioidea
Family:
Ambocoeliidae
Formal Genus Name and Reference:
Ilmenia NALIVKIN, 1941, p. 186
Type Species:
* I. altovae NALIVKIN, 1941, p. 187, OD
Images
(Click to enlarge in a new window)
Fig. 1142, 4a-d. *I. altovae, Russia, ventral, dorsal, anterior, and lateral views, X1 (Nalivkin, 1941).
Synonyms
Geographic Distribution
cosmopolitan
Age Range
Beginning Stage in Treatise Usage:
Middle Devonian
Beginning International Stage:
Eifelian
Fraction Up In Beginning Stage:
0
Beginning Date:
394.3
Ending Stage in Treatise Usage:
Middle Devonian
Ending International Stage:
Givetian
Fraction Up In Ending Stage:
100
Ending Date:
378.9
Description
Ventribiconvex, submegathyrid, ventral interarea low, incurved, commissure slightly uniplicate, capillate, dental plates short, divergent, crural plates short, discrete
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Spiriferida
Superfamily:
Ambocoelioidea
Family:
Ambocoeliidae
Formal Genus Name and Reference:
Ilmenia NALIVKIN, 1941, p. 186
Type Species:
* I. altovae NALIVKIN, 1941, p. 187, OD
Images
(Click to enlarge in a new window)
Fig. 1142, 4a-d. *I. altovae, Russia, ventral, dorsal, anterior, and lateral views, X1 (Nalivkin, 1941).
Synonyms
Geographic Distribution
cosmopolitan
Age Range
Beginning Stage in Treatise Usage:
Middle Devonian
Beginning International Stage:
Eifelian
Fraction Up In Beginning Stage:
0
Beginning Date:
394.3
Ending Stage in Treatise Usage:
Middle Devonian
Ending International Stage:
Givetian
Fraction Up In Ending Stage:
100
Ending Date:
378.9
Description
Ventribiconvex, submegathyrid, ventral interarea low, incurved, commissure slightly uniplicate, capillate, dental plates short, divergent, crural plates short, discrete