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Howittia
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Spiriferida
Superfamily:
Alolfioidea
Family:
Echinospiriferidae
Formal Genus Name and Reference:
Howittia Talent, 1956, p. 34
Type Species:
Spirifer howitti CHAPMAN, 1905, p. 18, OD
Images
(Click to enlarge in a new window)
Fig. 1121 a-e .\* H. howitti (Chapman), Australia, a-c, dorsal, anterior, and posterior views, × 1.5, d, transverse section of ventral valve, × 3, e, transverse section of dorsal valve, × 10 (Talent, 1956).
Synonyms
Glyptospirifer
Geographic Distribution
Australia, Mongolia, southern China, northern Vietnam
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 size, biconvex, transverse, with curved, apsacline ventral interarea, fold and sulcus prominent, sulcus with one or more plications, flanks with numerous, simple, rounded or subangular plications and narrow, U-shaped interspaces, growth lamellae may be prominent anteriorly, fila crossed by subradial capillae, dental plates extrasinal, ctenophoridium may be bilobed, without crural plates
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Spiriferida
Superfamily:
Alolfioidea
Family:
Echinospiriferidae
Formal Genus Name and Reference:
Howittia Talent, 1956, p. 34
Type Species:
Spirifer howitti CHAPMAN, 1905, p. 18, OD
Images
(Click to enlarge in a new window)
Fig. 1121 a-e .\* H. howitti (Chapman), Australia, a-c, dorsal, anterior, and posterior views, × 1.5, d, transverse section of ventral valve, × 3, e, transverse section of dorsal valve, × 10 (Talent, 1956).
Synonyms
Glyptospirifer
Geographic Distribution
Australia, Mongolia, southern China, northern Vietnam
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 size, biconvex, transverse, with curved, apsacline ventral interarea, fold and sulcus prominent, sulcus with one or more plications, flanks with numerous, simple, rounded or subangular plications and narrow, U-shaped interspaces, growth lamellae may be prominent anteriorly, fila crossed by subradial capillae, dental plates extrasinal, ctenophoridium may be bilobed, without crural plates