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Lissonia
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Ammonoidea
Order:
Ammonitida
Suborder:
Ammonitina
Superfamily:
Perisphinctaceae
Family:
Neocomitidae
Subfamily:
Neocomitinae
Formal Genus Name and Reference:
Lissonia GERTH, 1925, p. 111
Type Species:
Hoplites riveroi LISSON, 1907, p. 51, OD
Images
(Click to enlarge in a new window)
Fig. 42, 1a, b. *L. riveroi (Lisson), X 1 (Lisson, 1907)
Synonyms
Geographic Distribution
Peru
Age Range
Beginning Stage in Treatise Usage:
Lower Cretaceous (Upper Valanginian)
Beginning International Stage:
Valanginian
Fraction Up In Beginning Stage:
45
Beginning Date:
135.41
Ending Stage in Treatise Usage:
Lower Cretaceous (Upper Valanginian)
Ending International Stage:
Valanginian
Fraction Up In Ending Stage:
100
Ending Date:
132.6
Description
Compressed, involute, with deeply grooved venter, ribs fine, sharp, simple, bifurcating at midflank, strongly projected on rounded ventrolateral shoulder, no tubercles
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Ammonoidea
Order:
Ammonitida
Suborder:
Ammonitina
Superfamily:
Perisphinctaceae
Family:
Neocomitidae
Subfamily:
Neocomitinae
Formal Genus Name and Reference:
Lissonia GERTH, 1925, p. 111
Type Species:
Hoplites riveroi LISSON, 1907, p. 51, OD
Images
(Click to enlarge in a new window)
Fig. 42, 1a, b. *L. riveroi (Lisson), X 1 (Lisson, 1907)
Synonyms
Geographic Distribution
Peru
Age Range
Beginning Stage in Treatise Usage:
Lower Cretaceous (Upper Valanginian)
Beginning International Stage:
Valanginian
Fraction Up In Beginning Stage:
45
Beginning Date:
135.41
Ending Stage in Treatise Usage:
Lower Cretaceous (Upper Valanginian)
Ending International Stage:
Valanginian
Fraction Up In Ending Stage:
100
Ending Date:
132.6
Description
Compressed, involute, with deeply grooved venter, ribs fine, sharp, simple, bifurcating at midflank, strongly projected on rounded ventrolateral shoulder, no tubercles