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Trigonospirifer
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Spiriferida
Superfamily:
Delthyriodoidea
Family:
Hysterolitidae
Formal Genus Name and Reference:
Trigonospirifer Wang, Rong, & CHEN, 1987, p. 132
Type Species:
Subcuspidella trigonata Hou & XIAN, 1975, p. 68, OD
Images
(Click to enlarge in a new window)
Fig. 1217, 1 a-d .* T. trigonata (Hou & XiAN), ventral, dorsal, anterior, and side views, X1 (new).
Synonyms
Geographic Distribution
China (central Guangxi)
Age Range
Beginning Stage in Treatise Usage:
Lower Devonian (upper Emsian)
Beginning International Stage:
Emsian
Fraction Up In Beginning Stage:
66
Beginning Date:
399.81
Ending Stage in Treatise Usage:
Lower Devonian (upper Emsian)
Ending International Stage:
Emsian
Fraction Up In Ending Stage:
100
Ending Date:
394.3
Description
Large, biconvex, transverse, with acute cardinal angles, ventral interarea moderately high, steeply apsacline, with apical deltidium, fold and sulcus prominent, smooth, rounded, flanks with few strong, rounded plications and U-shaped interspaces, concentric lamellae widely to closely spaced, dental plates thick, with umbonal callus, crural plates lacking. Lower Devonian (upper Emsian): China (central Guangxi).
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Spiriferida
Superfamily:
Delthyriodoidea
Family:
Hysterolitidae
Formal Genus Name and Reference:
Trigonospirifer Wang, Rong, & CHEN, 1987, p. 132
Type Species:
Subcuspidella trigonata Hou & XIAN, 1975, p. 68, OD
Images
(Click to enlarge in a new window)
Fig. 1217, 1 a-d .* T. trigonata (Hou & XiAN), ventral, dorsal, anterior, and side views, X1 (new).
Synonyms
Geographic Distribution
China (central Guangxi)
Age Range
Beginning Stage in Treatise Usage:
Lower Devonian (upper Emsian)
Beginning International Stage:
Emsian
Fraction Up In Beginning Stage:
66
Beginning Date:
399.81
Ending Stage in Treatise Usage:
Lower Devonian (upper Emsian)
Ending International Stage:
Emsian
Fraction Up In Ending Stage:
100
Ending Date:
394.3
Description
Large, biconvex, transverse, with acute cardinal angles, ventral interarea moderately high, steeply apsacline, with apical deltidium, fold and sulcus prominent, smooth, rounded, flanks with few strong, rounded plications and U-shaped interspaces, concentric lamellae widely to closely spaced, dental plates thick, with umbonal callus, crural plates lacking. Lower Devonian (upper Emsian): China (central Guangxi).