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Mirorthis
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Orthida
Superfamily:
Dalmanelloidea
Family:
Dalmanellidae
Formal Genus Name and Reference:
Mirorthis Zeng in Wang & OTHERS, 1983, p. 116
Type Species:
M. mira, OD
Images
(Click to enlarge in a new window)
Fig. 567, 2a-g. *M. mira, Ashgill, a, internal mold of ventral valve of conjoined internal molds, southern China, $X_{3}, b$, enlargement of posterior part of conjoined internal molds, southern China, x1 0}^{\\mathbf{1}} 0, c$, internal mold of dorsal valve of conjoined internal molds, southern China, $\\mathbf{X}_{\\mathbf{3}}$, $d$, enlargement of posterior part of conjoined internal molds, southern China, $X_{10}, e$, external mold of ventral valve of same specimen, southern China, $X_{3}$ (Rong, 1984), $f$, internal mold of dorsal valve, Poland, x6 . 6, ~} g$, internal mold of ventral valve, Poland, x6.6$ (Temple, 1965).
Synonyms
Geographic Distribution
Europe, Morocco, China
Age Range
Beginning Stage in Treatise Usage:
Upper Ordovician (Ashgill)
Beginning International Stage:
Katian
Fraction Up In Beginning Stage:
66.7
Beginning Date:
447.72
Ending Stage in Treatise Usage:
Upper Ordovician (Ashgill)
Ending International Stage:
Hirnantian
Fraction Up In Ending Stage:
100
Ending Date:
443.07
Description
Subcircular, small, ventribiconvex valves, ventral interior with divergent dental plates and suboval muscle scar, dorsal interior with bilobed cardinal process, widely divergent brachiophore plates associated with ancillary struts and crural pits, fulcral plates well developed
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Orthida
Superfamily:
Dalmanelloidea
Family:
Dalmanellidae
Formal Genus Name and Reference:
Mirorthis Zeng in Wang & OTHERS, 1983, p. 116
Type Species:
M. mira, OD
Images
(Click to enlarge in a new window)
Fig. 567, 2a-g. *M. mira, Ashgill, a, internal mold of ventral valve of conjoined internal molds, southern China, $X_{3}, b$, enlargement of posterior part of conjoined internal molds, southern China, x1 0}^{\\mathbf{1}} 0, c$, internal mold of dorsal valve of conjoined internal molds, southern China, $\\mathbf{X}_{\\mathbf{3}}$, $d$, enlargement of posterior part of conjoined internal molds, southern China, $X_{10}, e$, external mold of ventral valve of same specimen, southern China, $X_{3}$ (Rong, 1984), $f$, internal mold of dorsal valve, Poland, x6 . 6, ~} g$, internal mold of ventral valve, Poland, x6.6$ (Temple, 1965).
Synonyms
Geographic Distribution
Europe, Morocco, China
Age Range
Beginning Stage in Treatise Usage:
Upper Ordovician (Ashgill)
Beginning International Stage:
Katian
Fraction Up In Beginning Stage:
66.7
Beginning Date:
447.72
Ending Stage in Treatise Usage:
Upper Ordovician (Ashgill)
Ending International Stage:
Hirnantian
Fraction Up In Ending Stage:
100
Ending Date:
443.07
Description
Subcircular, small, ventribiconvex valves, ventral interior with divergent dental plates and suboval muscle scar, dorsal interior with bilobed cardinal process, widely divergent brachiophore plates associated with ancillary struts and crural pits, fulcral plates well developed