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Raphistoma
Classification
Phylum:
Mollusca
Class:
Gastropoda
Subclass:
Prosobranchia
Order:
Archaeogastropoda
Suborder:
Pleurotomariina
Superfamily:
Pleurotomariacea
Family:
Raphistomatidae
Subfamily:
Raphistomatinae
Formal Genus Name and Reference:
Raphistoma HALL, 1847 [non Rafinesque, 1815, ICZN Op. 225]
Type Species:
Maclurea striatus Emmons, 1842, SD DEKONINCK, 1881
Images
(Click to enlarge in a new window)
Fig. 115,2. *R. striatum (Emmons), M.Ord., Vt., 2a,b, apertural view and from above, showing characteristic bends in growth lines, X1.5.
Synonyms
Geographic Distribution
N.Am.-Eu.
Age Range
Beginning Stage in Treatise Usage:
M. Ord.
Beginning International Stage:
Dapingian
Fraction Up In Beginning Stage:
0
Beginning Date:
471.26
Ending Stage in Treatise Usage:
Sil.
Ending International Stage:
Pridoli
Fraction Up In Ending Stage:
100
Ending Date:
419
Description
Upper surface nearly flat, base anomphalous or narrowly phaneromphalous, sinus culminating in notch that generates an angular selenizone forming periphery, upper lip sigmoid, ornamented by collabral cords
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Gastropoda
Subclass:
Prosobranchia
Order:
Archaeogastropoda
Suborder:
Pleurotomariina
Superfamily:
Pleurotomariacea
Family:
Raphistomatidae
Subfamily:
Raphistomatinae
Formal Genus Name and Reference:
Raphistoma HALL, 1847 [non Rafinesque, 1815, ICZN Op. 225]
Type Species:
Maclurea striatus Emmons, 1842, SD DEKONINCK, 1881
Images
(Click to enlarge in a new window)
Fig. 115,2. *R. striatum (Emmons), M.Ord., Vt., 2a,b, apertural view and from above, showing characteristic bends in growth lines, X1.5.
Synonyms
Geographic Distribution
N.Am.-Eu.
Age Range
Beginning Stage in Treatise Usage:
M. Ord.
Beginning International Stage:
Dapingian
Fraction Up In Beginning Stage:
0
Beginning Date:
471.26
Ending Stage in Treatise Usage:
Sil.
Ending International Stage:
Pridoli
Fraction Up In Ending Stage:
100
Ending Date:
419
Description
Upper surface nearly flat, base anomphalous or narrowly phaneromphalous, sinus culminating in notch that generates an angular selenizone forming periphery, upper lip sigmoid, ornamented by collabral cords