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Properrinites
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Ammonoidea
Order:
Goniatitida
Suborder:
Goniatitina
Superfamily:
Shumarditoidea
Family:
Perrinitidae
Formal Genus Name and Reference:
Properrinites ELIAS, 1938, p. 102
Type Species:
Perrinites Bösei Plummer & SCOTT, 1937, p. 307, OD
Images
(Click to enlarge in a new window)
Fig. 89a-c. *P. boesei (Plummer & Scott), Admiral Formation, northcentral Texas, a-b, × 2, c, diameter at 53 mm (adapted from Tharalson, 1984).-FIG. 89d-f. P. bakeri, Lenox Hills Formation, western Texas, d, diameter at 8.3 mm, e, diameter at 17 mm, f, diameter at 50 mm (adapted from Tharalson, 1984).
Synonyms
Subperrinites
Geographic Distribution
USA (Texas, New Mexico, Kansas, Nebraska, Nevada), Canada (Yukon), Tajikistan (Pamir), southern China (Guangxi), Indonesia (Timor)
Age Range
Beginning Stage in Treatise Usage:
Cisuralian (Asselian)
Beginning International Stage:
Asselian
Fraction Up In Beginning Stage:
0
Beginning Date:
298.89
Ending Stage in Treatise Usage:
Cisuralian (Sakmarian)
Ending International Stage:
Sakmarian
Fraction Up In Ending Stage:
100
Ending Date:
290.51
Description
Ancestral perrinitids of medium size (maximum conch diameter 15 cm) with depressed whorls (H/W, 0.6-0.9), moderate umbilicus (Umin/D, 0.2-0.5), and shallow hyponomic sinus. Mature sutures have a single discrete first-order subdivision on ventral flank of each prong of ventral lobe (V1) and a dorsal lobe (D) that is prominently trifid, second-order subdivisions are either absent or incipient and confined to first lateral saddle. Crest of fourth external lateral saddle and fourth internal lateral saddle lie beneath general sutural alignment. Sutural formula: (V1 V1) L2 L1 (L2.1 L2.2) U2 U1: U2 (I2.2 I2.1) I1 I2 D Russian.
References
Museum or Author Information
Classification
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Ammonoidea
Order:
Goniatitida
Suborder:
Goniatitina
Superfamily:
Shumarditoidea
Family:
Perrinitidae
Formal Genus Name and Reference:
Properrinites ELIAS, 1938, p. 102
Type Species:
Perrinites Bösei Plummer & SCOTT, 1937, p. 307, OD
Images
(Click to enlarge in a new window)
Fig. 89a-c. *P. boesei (Plummer & Scott), Admiral Formation, northcentral Texas, a-b, × 2, c, diameter at 53 mm (adapted from Tharalson, 1984).-FIG. 89d-f. P. bakeri, Lenox Hills Formation, western Texas, d, diameter at 8.3 mm, e, diameter at 17 mm, f, diameter at 50 mm (adapted from Tharalson, 1984).
Synonyms
Subperrinites
Geographic Distribution
USA (Texas, New Mexico, Kansas, Nebraska, Nevada), Canada (Yukon), Tajikistan (Pamir), southern China (Guangxi), Indonesia (Timor)
Age Range
Beginning Stage in Treatise Usage:
Cisuralian (Asselian)
Beginning International Stage:
Asselian
Fraction Up In Beginning Stage:
0
Beginning Date:
298.89
Ending Stage in Treatise Usage:
Cisuralian (Sakmarian)
Ending International Stage:
Sakmarian
Fraction Up In Ending Stage:
100
Ending Date:
290.51
Description
Ancestral perrinitids of medium size (maximum conch diameter 15 cm) with depressed whorls (H/W, 0.6-0.9), moderate umbilicus (Umin/D, 0.2-0.5), and shallow hyponomic sinus. Mature sutures have a single discrete first-order subdivision on ventral flank of each prong of ventral lobe (V1) and a dorsal lobe (D) that is prominently trifid, second-order subdivisions are either absent or incipient and confined to first lateral saddle. Crest of fourth external lateral saddle and fourth internal lateral saddle lie beneath general sutural alignment. Sutural formula: (V1 V1) L2 L1 (L2.1 L2.2) U2 U1: U2 (I2.2 I2.1) I1 I2 D Russian.