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Cephalograptus
Classification
Phylum:
Hemichordata
Class:
Pterobranchia
Subclass:
Graptolithina
Order:
Graptoloidea
Suborder:
Axonophora
Infraorder:
Neograptina
Superfamily:
Retiolitoidea
Family:
Retiolitidae
Subfamily:
Petalolithinae - Ancorate taxa subset
Formal Genus Name and Reference:
Cephalograptus HOPKINSON, 1869, p. 159
Type Species:
Diplograpsus cometa GEINITZ, 1852, OD
Images
(Click to enlarge in a new window)
Fig. 262,1a-d. * C. cometa (Geinitz), 1 a, type specimen, not preserved, scale unclear (Geinitz, 1852, pl. 1,28a), 1b, LO 1120t, reverse view, latex cast, 1 c, LO 1121 t , obverse view showing median septum, latex cast, 1 d, LO 1124 t , proximal end in obverse view, 1 b-1 d, Tommarp, Scania, Sweden, scale bars, 1 mm (new).
Synonyms
Geographic Distribution
worldwide
Age Range
Beginning Stage in Treatise Usage:
Silurian (Llandovery (Aeronian, Lituigraptus convolutus Biozone
Beginning International Stage:
Aeronian
Fraction Up In Beginning Stage:
0
Beginning Date:
440.49
Ending Stage in Treatise Usage:
Silurian, Llandovery (Aeronian, Stimulograptus halli Biozone)
Ending International Stage:
Aeronian
Fraction Up In Ending Stage:
100
Ending Date:
438.59
Description
Petalolithine with pattern I astogeny and strongly elongated thecae but short sicula, thecae with fairly straight ventral sides, number of thecae often reduced, ancora present in some, partial median septum on obverse side
References
Hopkinson, John. 1869. On British graptolites. Journal of the Quekett Microscopical Club 1:151166, pl. 8.
Museum or Author Information
Classification
Phylum:
Hemichordata
Class:
Pterobranchia
Subclass:
Graptolithina
Order:
Graptoloidea
Suborder:
Axonophora
Infraorder:
Neograptina
Superfamily:
Retiolitoidea
Family:
Retiolitidae
Subfamily:
Petalolithinae - Ancorate taxa subset
Formal Genus Name and Reference:
Cephalograptus HOPKINSON, 1869, p. 159
Type Species:
Diplograpsus cometa GEINITZ, 1852, OD
Images
(Click to enlarge in a new window)
Fig. 262,1a-d. * C. cometa (Geinitz), 1 a, type specimen, not preserved, scale unclear (Geinitz, 1852, pl. 1,28a), 1b, LO 1120t, reverse view, latex cast, 1 c, LO 1121 t , obverse view showing median septum, latex cast, 1 d, LO 1124 t , proximal end in obverse view, 1 b-1 d, Tommarp, Scania, Sweden, scale bars, 1 mm (new).
Synonyms
Geographic Distribution
worldwide
Age Range
Beginning Stage in Treatise Usage:
Silurian (Llandovery (Aeronian, Lituigraptus convolutus Biozone
Beginning International Stage:
Aeronian
Fraction Up In Beginning Stage:
0
Beginning Date:
440.49
Ending Stage in Treatise Usage:
Silurian, Llandovery (Aeronian, Stimulograptus halli Biozone)
Ending International Stage:
Aeronian
Fraction Up In Ending Stage:
100
Ending Date:
438.59
Description
Petalolithine with pattern I astogeny and strongly elongated thecae but short sicula, thecae with fairly straight ventral sides, number of thecae often reduced, ancora present in some, partial median septum on obverse side
References
Hopkinson, John. 1869. On British graptolites. Journal of the Quekett Microscopical Club 1:151166, pl. 8.