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Maconiceras
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Eoderocerataceae
Family:
Hildoceratidae
Formal Genus Name and Reference:
Maconiceras BUCKMAN, 1926
Type Species:
M. vigoense
Images
(Click to enlarge in a new window)
Fig. 290,2. *M. vigoense, 2 a, b, X1 (65*)
Synonyms
Geographic Distribution
Eu.
Age Range
Beginning Stage in Treatise Usage:
L.Toarc.
Beginning International Stage:
Toarcian
Fraction Up In Beginning Stage:
0
Beginning Date:
184.2
Ending Stage in Treatise Usage:
L.Toarc.
Ending International Stage:
Toarcian
Fraction Up In Ending Stage:
50
Ending Date:
179.45
Description
Venter becoming carinate-bisulcate and ending in long rostrum, ribbing similar to that of Lioceratoides, fading on gentle umbilical slope
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Order:
Ammonitida
Superfamily:
Eoderocerataceae
Family:
Hildoceratidae
Formal Genus Name and Reference:
Maconiceras BUCKMAN, 1926
Type Species:
M. vigoense
Images
(Click to enlarge in a new window)
Fig. 290,2. *M. vigoense, 2 a, b, X1 (65*)
Synonyms
Geographic Distribution
Eu.
Age Range
Beginning Stage in Treatise Usage:
L.Toarc.
Beginning International Stage:
Toarcian
Fraction Up In Beginning Stage:
0
Beginning Date:
184.2
Ending Stage in Treatise Usage:
L.Toarc.
Ending International Stage:
Toarcian
Fraction Up In Ending Stage:
50
Ending Date:
179.45
Description
Venter becoming carinate-bisulcate and ending in long rostrum, ribbing similar to that of Lioceratoides, fading on gentle umbilical slope