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Murchisonia
Classification
Phylum:
Mollusca
Class:
Gastropoda
Subclass:
Prosobranchia
Order:
Archaeogastropoda
Suborder:
Archaeogastropoda? - Suborder Murchisoniina
Superfamily:
Murchisoniacea
Family:
Murchisoniidae
Formal Genus Name and Reference:
Murchisonia d'Archiac & DEVERNEUIL, 1841
Type Species:
Turritella bilineata Dechen, 1832, pro Murex turbinatus (Schlotheim) Dechen, 1832 (non Murex turbinatus Brocchi, 1814) =Muricites turbinatus Schlotheim, 1820, SD WOODWARD, 1856
Images
(Click to enlarge in a new window)
Fig. 190,5. *M. (M.) bilineata (Dechen), M.Dev., Ger., X2.7.
Synonyms
Geographic Distribution
N.Am.-Eu.-NE.Asia-SE.AsiaAustral.
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:
Trias.
Ending International Stage:
Rhaetian
Fraction Up In Ending Stage:
100
Ending Date:
201.36
Description
With labral sinus culminating at about middle of labrum in shallow slit or notch; commonly without ornament other than margins of selenizone and growth lines. [In Middle Devonian close relatives of type species display a burst of forms with elaborate, in part bizarre, shapes and ornament quite incongruous with usual conservatism shown by genus. Recognized subgenera are more or less intergrading.]
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Gastropoda
Subclass:
Prosobranchia
Order:
Archaeogastropoda
Suborder:
Archaeogastropoda? - Suborder Murchisoniina
Superfamily:
Murchisoniacea
Family:
Murchisoniidae
Formal Genus Name and Reference:
Murchisonia d'Archiac & DEVERNEUIL, 1841
Type Species:
Turritella bilineata Dechen, 1832, pro Murex turbinatus (Schlotheim) Dechen, 1832 (non Murex turbinatus Brocchi, 1814) =Muricites turbinatus Schlotheim, 1820, SD WOODWARD, 1856
Images
(Click to enlarge in a new window)
Fig. 190,5. *M. (M.) bilineata (Dechen), M.Dev., Ger., X2.7.
Synonyms
Geographic Distribution
N.Am.-Eu.-NE.Asia-SE.AsiaAustral.
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:
Trias.
Ending International Stage:
Rhaetian
Fraction Up In Ending Stage:
100
Ending Date:
201.36
Description
With labral sinus culminating at about middle of labrum in shallow slit or notch; commonly without ornament other than margins of selenizone and growth lines. [In Middle Devonian close relatives of type species display a burst of forms with elaborate, in part bizarre, shapes and ornament quite incongruous with usual conservatism shown by genus. Recognized subgenera are more or less intergrading.]