Welcome to the Treatise on Invertebrate Paleontology!
Please enter a genera name to retrieve more information.
Propinacoceras
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Ammonoidea
Order:
Prolecanitida
Superfamily:
Medlicottioidea
Family:
Medlicottiidae
Subfamily:
Propinacoceratinae
Formal Genus Name and Reference:
Propinacoceras GEMMELLARO, 1887, p. 55
Type Species:
P. Beyrichi Gemmellaro, 1887, p. 56, SD DIENER, 1921, p. 12
Images
(Click to enlarge in a new window)
Fig. 132, 1a-c. *P. beyrichi, Sosio limestone Wordian, Sicily, a-b, lectotype (herein), MGUP 96A of Gemmellaro (1887, pl. 5, 12-13 ), X 1.2 (Gemmellaro, 1887), c, unfigured paralectotype, MGUP 98A of Gemmellaro (1887), diameter at 26 mm (new).--Fig. 132, 1d. P. ajense Maksimova, hypotype, SUI 84906, Artinskian, Baigendzhinian, central Urals, River Kos'va, diameter at 31 mm (new, courtesy of D. M. Work & W. B. Saunders).
Synonyms
Geographic Distribution
Italy (Sicily), Croatia, Iraq (Kurdistan), Oman, Russia and Kazakhstan (Southern Urals), Tajikistan (Pamir), Afghanistan, Ukraine (Crimea), China (Xizang, Xinjiang, Guizhou, Guangxi, Jilin, Gansu), Mexico (Coahuila), Indonesia (Timor), USA (Texas), Japan (Kitakami Massif), Canada (British Columbia)
Age Range
Beginning Stage in Treatise Usage:
Cisuralian (Sakmarian)
Beginning International Stage:
Sakmarian
Fraction Up In Beginning Stage:
0
Beginning Date:
293.52
Ending Stage in Treatise Usage:
Guadalupian (Wordian)
Ending International Stage:
Wordian
Fraction Up In Ending Stage:
100
Ending Date:
264.34
Description
Conch large (diameter to 20 cm) with strong ventral ribs or nodes separated by median furrow. Suture characterized by undivided ventral flank of ventrolateral saddle and by dorsal subdivision of primary external lateral lobe (L1(d) ) that is less than one-half size of adjacent primary umbilical lobe. Sutural formula: (V2 V1 V2 )s1 s1 L1(d) UU1 U2 ..... [Russian]. Type species has mondial distribution; remaining 19 named species poorly characterized and questionably valid.
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Ammonoidea
Order:
Prolecanitida
Superfamily:
Medlicottioidea
Family:
Medlicottiidae
Subfamily:
Propinacoceratinae
Formal Genus Name and Reference:
Propinacoceras GEMMELLARO, 1887, p. 55
Type Species:
P. Beyrichi Gemmellaro, 1887, p. 56, SD DIENER, 1921, p. 12
Images
(Click to enlarge in a new window)
Fig. 132, 1a-c. *P. beyrichi, Sosio limestone Wordian, Sicily, a-b, lectotype (herein), MGUP 96A of Gemmellaro (1887, pl. 5, 12-13 ), X 1.2 (Gemmellaro, 1887), c, unfigured paralectotype, MGUP 98A of Gemmellaro (1887), diameter at 26 mm (new).--Fig. 132, 1d. P. ajense Maksimova, hypotype, SUI 84906, Artinskian, Baigendzhinian, central Urals, River Kos'va, diameter at 31 mm (new, courtesy of D. M. Work & W. B. Saunders).
Synonyms
Geographic Distribution
Italy (Sicily), Croatia, Iraq (Kurdistan), Oman, Russia and Kazakhstan (Southern Urals), Tajikistan (Pamir), Afghanistan, Ukraine (Crimea), China (Xizang, Xinjiang, Guizhou, Guangxi, Jilin, Gansu), Mexico (Coahuila), Indonesia (Timor), USA (Texas), Japan (Kitakami Massif), Canada (British Columbia)
Age Range
Beginning Stage in Treatise Usage:
Cisuralian (Sakmarian)
Beginning International Stage:
Sakmarian
Fraction Up In Beginning Stage:
0
Beginning Date:
293.52
Ending Stage in Treatise Usage:
Guadalupian (Wordian)
Ending International Stage:
Wordian
Fraction Up In Ending Stage:
100
Ending Date:
264.34
Description
Conch large (diameter to 20 cm) with strong ventral ribs or nodes separated by median furrow. Suture characterized by undivided ventral flank of ventrolateral saddle and by dorsal subdivision of primary external lateral lobe (L1(d) ) that is less than one-half size of adjacent primary umbilical lobe. Sutural formula: (V2 V1 V2 )s1 s1 L1(d) UU1 U2 ..... [Russian]. Type species has mondial distribution; remaining 19 named species poorly characterized and questionably valid.