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Maclurites
Classification
Phylum:
Mollusca
Class:
Gastropoda
Subclass:
Prosobranchia
Order:
Archaeogastropoda
Suborder:
Macluritina
Superfamily:
Macluritacea
Family:
Macluritidae
Formal Genus Name and Reference:
Maclurites LESUEUR, 1818
Type Species:
M. magna, SD de KONINCK, 1881
Images
(Click to enlarge in a new window)
Fig. 105,7. M. logani (Salter), M.Ord., Can.(Que.), 7a, apertural view, operculum in place, X0.7; 7b, inner surface of operculum showing 2 muscle scars (right, below, left, above), X0.7.
Synonyms
Maclurita, Maclurea, Maclureia, Maclurina
Geographic Distribution
N.Am.-Eu.-NE.Asia
Age Range
Beginning Stage in Treatise Usage:
Ord.
Beginning International Stage:
Tremadocian
Fraction Up In Beginning Stage:
0
Beginning Date:
486.85
Ending Stage in Treatise Usage:
Ord.
Ending International Stage:
Hirnantian
Fraction Up In Ending Stage:
100
Ending Date:
443.07
Description
Shell large, heavy, with flat base, upper surface strongly convex, with deep, steep-walled umbilicus, whorls with subangular crest, locus of a slight sinus, ornament growth lines and in some species spiral cords, operculum calcareous, paucispiral from nucleus, which lies near base toward parietal lip, nuclear part in some species protruding like a horn, inner surface with large projecting roughened apophysis for attachment of left retractor muscle and smaller roughened area above for right retractor muscle
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Gastropoda
Subclass:
Prosobranchia
Order:
Archaeogastropoda
Suborder:
Macluritina
Superfamily:
Macluritacea
Family:
Macluritidae
Formal Genus Name and Reference:
Maclurites LESUEUR, 1818
Type Species:
M. magna, SD de KONINCK, 1881
Images
(Click to enlarge in a new window)
Fig. 105,7. M. logani (Salter), M.Ord., Can.(Que.), 7a, apertural view, operculum in place, X0.7; 7b, inner surface of operculum showing 2 muscle scars (right, below, left, above), X0.7.
Synonyms
Maclurita, Maclurea, Maclureia, Maclurina
Geographic Distribution
N.Am.-Eu.-NE.Asia
Age Range
Beginning Stage in Treatise Usage:
Ord.
Beginning International Stage:
Tremadocian
Fraction Up In Beginning Stage:
0
Beginning Date:
486.85
Ending Stage in Treatise Usage:
Ord.
Ending International Stage:
Hirnantian
Fraction Up In Ending Stage:
100
Ending Date:
443.07
Description
Shell large, heavy, with flat base, upper surface strongly convex, with deep, steep-walled umbilicus, whorls with subangular crest, locus of a slight sinus, ornament growth lines and in some species spiral cords, operculum calcareous, paucispiral from nucleus, which lies near base toward parietal lip, nuclear part in some species protruding like a horn, inner surface with large projecting roughened apophysis for attachment of left retractor muscle and smaller roughened area above for right retractor muscle