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Ivanoviella
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Rhynchonellida
Superfamily:
Rhynchonelloidea
Family:
Rhynchonellidae
Formal Genus Name and Reference:
Ivanoviella MAKRIDIN, 1955, p. 83, non IVANOVA in ABUSHIK & others, 1960, Ostracoda
Type Species:
Rhynchonella alemanica sensu Makridin, 1955, OD, non Rollier, 1917, =Ivanoviella gaetanii Alméras, Benigni, & TINTORI, 1991, p. 431
Images
(Click to enlarge in a new window)
Fig. 878, 3a-l. * I.
Synonyms
Jvanoviella, Ivanoviella, Ivanowiella
Geographic Distribution
France, Germany, Switzerland, Russian Platform, Poland, Crimea, Caucasus, central Asia, western Himalayas (India, Nepal), China
Age Range
Beginning Stage in Treatise Usage:
Middle Jurassic (Bajocian)
Beginning International Stage:
Bajocian
Fraction Up In Beginning Stage:
0
Beginning Date:
170.9
Ending Stage in Treatise Usage:
Middle Jurassic (Callovian), Upper Jurassic (?Oxfordian)
Ending International Stage:
Oxfordian
Fraction Up In Ending Stage:
100
Ending Date:
154.78
Description
Small, sulcus and fold pronounced in maturity, radial costae numerous, narrow, simple, covering shell, beginning near beak after variable smooth stage, beak slender, short, usually weakly incurved, foramen elliptical, sometimes almost circular, submesothyrid, deltidial plates conjunct. Dental plates thin, wide apart, becoming detached around articulation zone, crura short, bladelike, extending ventrally, dorsal septum thin, united with hinge plate margins, ventral muscle scars rounded-rectangular, dorsal anterior adductors pear shaped, dorsal posterior adductors oval.
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Rhynchonellida
Superfamily:
Rhynchonelloidea
Family:
Rhynchonellidae
Formal Genus Name and Reference:
Ivanoviella MAKRIDIN, 1955, p. 83, non IVANOVA in ABUSHIK & others, 1960, Ostracoda
Type Species:
Rhynchonella alemanica sensu Makridin, 1955, OD, non Rollier, 1917, =Ivanoviella gaetanii Alméras, Benigni, & TINTORI, 1991, p. 431
Images
(Click to enlarge in a new window)
Fig. 878, 3a-l. * I.
Synonyms
Jvanoviella, Ivanoviella, Ivanowiella
Geographic Distribution
France, Germany, Switzerland, Russian Platform, Poland, Crimea, Caucasus, central Asia, western Himalayas (India, Nepal), China
Age Range
Beginning Stage in Treatise Usage:
Middle Jurassic (Bajocian)
Beginning International Stage:
Bajocian
Fraction Up In Beginning Stage:
0
Beginning Date:
170.9
Ending Stage in Treatise Usage:
Middle Jurassic (Callovian), Upper Jurassic (?Oxfordian)
Ending International Stage:
Oxfordian
Fraction Up In Ending Stage:
100
Ending Date:
154.78
Description
Small, sulcus and fold pronounced in maturity, radial costae numerous, narrow, simple, covering shell, beginning near beak after variable smooth stage, beak slender, short, usually weakly incurved, foramen elliptical, sometimes almost circular, submesothyrid, deltidial plates conjunct. Dental plates thin, wide apart, becoming detached around articulation zone, crura short, bladelike, extending ventrally, dorsal septum thin, united with hinge plate margins, ventral muscle scars rounded-rectangular, dorsal anterior adductors pear shaped, dorsal posterior adductors oval.