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Haugia
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Ammonoidea
Order:
Ceratitida
Suborder:
Ammonitina
Superfamily:
Hildocerataceae
Family:
Hammatoceratidae
Subfamily:
Phymatoceratinae
Formal Genus Name and Reference:
Haugia BUCKMAN, 1888
Type Species:
*Am. variabilis D'ORBIGNY, 1845
Images
(Click to enlarge in a new window)
Fig. 305,1. *H. variabilis (Orb.), Fr., 1a,b, X 0.25 (330*)
Synonyms
Geographic Distribution
Eu.-N.Afr.-Japan-Can.-Chile
Age Range
Beginning Stage in Treatise Usage:
U.Toarc.
Beginning International Stage:
Toarcian
Fraction Up In Beginning Stage:
50
Beginning Date:
179.45
Ending Stage in Treatise Usage:
U.Toarc.
Ending International Stage:
Toarcian
Fraction Up In Ending Stage:
100
Ending Date:
174.7
Description
Compressed, discoidal, with single tall and massive keel, ribbing strong, regular, twinned or triploid from regular row of tubercles, fading on last half whorl
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Ammonoidea
Order:
Ceratitida
Suborder:
Ammonitina
Superfamily:
Hildocerataceae
Family:
Hammatoceratidae
Subfamily:
Phymatoceratinae
Formal Genus Name and Reference:
Haugia BUCKMAN, 1888
Type Species:
*Am. variabilis D'ORBIGNY, 1845
Images
(Click to enlarge in a new window)
Fig. 305,1. *H. variabilis (Orb.), Fr., 1a,b, X 0.25 (330*)
Synonyms
Geographic Distribution
Eu.-N.Afr.-Japan-Can.-Chile
Age Range
Beginning Stage in Treatise Usage:
U.Toarc.
Beginning International Stage:
Toarcian
Fraction Up In Beginning Stage:
50
Beginning Date:
179.45
Ending Stage in Treatise Usage:
U.Toarc.
Ending International Stage:
Toarcian
Fraction Up In Ending Stage:
100
Ending Date:
174.7
Description
Compressed, discoidal, with single tall and massive keel, ribbing strong, regular, twinned or triploid from regular row of tubercles, fading on last half whorl