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Rhynchospirina
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Athyridida
Superfamily:
Rhynchospirinoidea
Family:
Rhynchospirinidae
Formal Genus Name and Reference:
Rhynchospirina Schuchert & LEVENE, 1929b, p. 121
Type Species:
Waldheimia formosa HALL, 1857a, p. 88, OD
Images
(Click to enlarge in a new window)
Fig. 1090, $1 a-f .* R$. formosa (HALL), Lochkovian, Lower Helderberg Group, New York, USA, $a-e$, lectotype, dorsal, ventral, lateral, anterior, and posterior views, AMNH 33399, Hall collection, x2$ (Alvarez & Brime, 2000), $f$, lateral view showing jugum (Hall & Clarke, 1893)."
Synonyms
Rhyncospira
Geographic Distribution
North America, Venezuela, Podolia, southwestern Urals, Mongolia, GornoAltay, western Qinling, Tibet, WenlockâMiddle Devonian; Gorno-Altay, Upper Devonian.
Age Range
Beginning Stage in Treatise Usage:
Silurian (Wenlock)
Beginning International Stage:
Sheinwoodian
Fraction Up In Beginning Stage:
0
Beginning Date:
432.93
Ending Stage in Treatise Usage:
Upper Devonian (Frasnian)
Ending International Stage:
Frasnian
Fraction Up In Ending Stage:
100
Ending Date:
371.1
Description
Externally similar to Homoeospira but deltidial plates conjunct and foramen in meso- to permesothyridid position, short dental plates may be present, incipient pedicle collar variably developed or absent, cardinal plate trapezoidal with flat cardinal flanges, projecting posteroventrally, hinge plate short (in comparison with long, flat outer hinge plates), thick, extending as transverse process between cardinal flanges and supported by short median septum extending anteriorly as low ridge.
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Rhynchonellata
Order:
Athyridida
Superfamily:
Rhynchospirinoidea
Family:
Rhynchospirinidae
Formal Genus Name and Reference:
Rhynchospirina Schuchert & LEVENE, 1929b, p. 121
Type Species:
Waldheimia formosa HALL, 1857a, p. 88, OD
Images
(Click to enlarge in a new window)
Fig. 1090, $1 a-f .* R$. formosa (HALL), Lochkovian, Lower Helderberg Group, New York, USA, $a-e$, lectotype, dorsal, ventral, lateral, anterior, and posterior views, AMNH 33399, Hall collection, x2$ (Alvarez & Brime, 2000), $f$, lateral view showing jugum (Hall & Clarke, 1893)."
Synonyms
Rhyncospira
Geographic Distribution
North America, Venezuela, Podolia, southwestern Urals, Mongolia, GornoAltay, western Qinling, Tibet, WenlockâMiddle Devonian; Gorno-Altay, Upper Devonian.
Age Range
Beginning Stage in Treatise Usage:
Silurian (Wenlock)
Beginning International Stage:
Sheinwoodian
Fraction Up In Beginning Stage:
0
Beginning Date:
432.93
Ending Stage in Treatise Usage:
Upper Devonian (Frasnian)
Ending International Stage:
Frasnian
Fraction Up In Ending Stage:
100
Ending Date:
371.1
Description
Externally similar to Homoeospira but deltidial plates conjunct and foramen in meso- to permesothyridid position, short dental plates may be present, incipient pedicle collar variably developed or absent, cardinal plate trapezoidal with flat cardinal flanges, projecting posteroventrally, hinge plate short (in comparison with long, flat outer hinge plates), thick, extending as transverse process between cardinal flanges and supported by short median septum extending anteriorly as low ridge.