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Howellites
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Orthida
Superfamily:
Dalmanelloidea
Family:
Dalmanellidae
Formal Genus Name and Reference:
Howellites BANCROFT, 1945, p. 203
Type Species:
Resserella (Howellites) striata, OD
Images
(Click to enlarge in a new window)
Fig. 568, 2a-e. *H. striatus (Bancroft), Caradoc, Wales, $a$, rubber replica of ventral exterior, x2.5$, b, rubber replica of dorsal exterior, x2.5$, $c$, internal mold of ventral valve, $X_{3}$, $d$, internal mold of dorsal valve, $X_{3}$.5, $e$, rubber replica of dorsal interior, $X 4$ (Williams, 1963).
Synonyms
Mesodalmanella
Geographic Distribution
Europe, Morocco
Age Range
Beginning Stage in Treatise Usage:
Upper Ordovician (Caradoc)
Beginning International Stage:
Sandbian
Fraction Up In Beginning Stage:
0
Beginning Date:
458.18
Ending Stage in Treatise Usage:
Upper Ordovician (Caradoc)
Ending International Stage:
Katian
Fraction Up In Ending Stage:
66.7
Ending Date:
447.72
Description
Subcircular, ventribiconvex valves, ventral interior with bilobed muscle scar and divergent dental plates, dorsal interior with brachiophore plates variably divergent ventrally and rare fulcral plates
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Orthida
Superfamily:
Dalmanelloidea
Family:
Dalmanellidae
Formal Genus Name and Reference:
Howellites BANCROFT, 1945, p. 203
Type Species:
Resserella (Howellites) striata, OD
Images
(Click to enlarge in a new window)
Fig. 568, 2a-e. *H. striatus (Bancroft), Caradoc, Wales, $a$, rubber replica of ventral exterior, x2.5$, b, rubber replica of dorsal exterior, x2.5$, $c$, internal mold of ventral valve, $X_{3}$, $d$, internal mold of dorsal valve, $X_{3}$.5, $e$, rubber replica of dorsal interior, $X 4$ (Williams, 1963).
Synonyms
Mesodalmanella
Geographic Distribution
Europe, Morocco
Age Range
Beginning Stage in Treatise Usage:
Upper Ordovician (Caradoc)
Beginning International Stage:
Sandbian
Fraction Up In Beginning Stage:
0
Beginning Date:
458.18
Ending Stage in Treatise Usage:
Upper Ordovician (Caradoc)
Ending International Stage:
Katian
Fraction Up In Ending Stage:
66.7
Ending Date:
447.72
Description
Subcircular, ventribiconvex valves, ventral interior with bilobed muscle scar and divergent dental plates, dorsal interior with brachiophore plates variably divergent ventrally and rare fulcral plates