Welcome to the Treatise on Invertebrate Paleontology!
Please enter a genera name to retrieve more information.
Aseptalium
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Rhynchonellida
Superfamily:
Uncinuloidea
Family:
Innaechiidae
Formal Genus Name and Reference:
Aseptalium Hou & XIAN, 1975, p. 37
Type Species:
Uncinulus guangxiense WANG, 1965, p. 72, OD
Images
(Click to enlarge in a new window)
Fig. 760, 1a-k. *A. guangxiense (WANG), upper Pragian-lower Emsian, Nagaoling Formation, Guangxi, Henxian County, Liujing, southern China, $a-d$, dorsal, ventral, anterior, and lateral views, x2.2$ (Hou & Xian, 1975), $e-k$, serial sections, x3.3$ (new).
Synonyms
Geographic Distribution
China
Age Range
Beginning Stage in Treatise Usage:
Lower Devonian (Pragian)
Beginning International Stage:
Pragian
Fraction Up In Beginning Stage:
0
Beginning Date:
412.4
Ending Stage in Treatise Usage:
Lower Devonian (Emsian)
Ending International Stage:
Emsian
Fraction Up In Ending Stage:
100
Ending Date:
394.3
Description
Medium to large with transversely subpentagonal outline and dorsibiconvex profile, Fold and sulcus well defined, tongue wide, rectangular, Costae numerous, strong, simple, from beaks, flattened and grooved on paries geniculatus, marginal spines pronounced, Dental plates short, convergent ventrally, ventral muscle field deeply impressed, Dorsal interior with very short crural plates posteriorly, sometimes meeting on valve floor, outer hinge plates horizontal, divided, median ridge short and low, crura long, rodlike, septalium, dorsal median septum, and cardinal process absent.
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Rhynchonellida
Superfamily:
Uncinuloidea
Family:
Innaechiidae
Formal Genus Name and Reference:
Aseptalium Hou & XIAN, 1975, p. 37
Type Species:
Uncinulus guangxiense WANG, 1965, p. 72, OD
Images
(Click to enlarge in a new window)
Fig. 760, 1a-k. *A. guangxiense (WANG), upper Pragian-lower Emsian, Nagaoling Formation, Guangxi, Henxian County, Liujing, southern China, $a-d$, dorsal, ventral, anterior, and lateral views, x2.2$ (Hou & Xian, 1975), $e-k$, serial sections, x3.3$ (new).
Synonyms
Geographic Distribution
China
Age Range
Beginning Stage in Treatise Usage:
Lower Devonian (Pragian)
Beginning International Stage:
Pragian
Fraction Up In Beginning Stage:
0
Beginning Date:
412.4
Ending Stage in Treatise Usage:
Lower Devonian (Emsian)
Ending International Stage:
Emsian
Fraction Up In Ending Stage:
100
Ending Date:
394.3
Description
Medium to large with transversely subpentagonal outline and dorsibiconvex profile, Fold and sulcus well defined, tongue wide, rectangular, Costae numerous, strong, simple, from beaks, flattened and grooved on paries geniculatus, marginal spines pronounced, Dental plates short, convergent ventrally, ventral muscle field deeply impressed, Dorsal interior with very short crural plates posteriorly, sometimes meeting on valve floor, outer hinge plates horizontal, divided, median ridge short and low, crura long, rodlike, septalium, dorsal median septum, and cardinal process absent.