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Eridorthis
Classification
Phylum:
Brachiopoda
Subphylum:
Rhynchonelliformea
Class:
Rhynchonellata
Order:
Orthida
Suborder:
Orthidina
Superfamily:
Orthoidea
Family:
Glyptorthidae
Formal Genus Name and Reference:
Eridorthis FOERSTE, 1909b, p. 223
Type Species:
Plectorthis (Eridorthis) nicklesi, OD
Images
(Click to enlarge in a new window)
Fig. 530, 2a. *E. nicklesi (Foerste), Caradoc, Kentucky, ventral exterior, X1.5 (Schuchert & Cooper, 1932), Fig. 530, 2b. E. rogerensis Foerste, Caradoc, Kentucky, dorsal exterior, x1.5 (Schuchert & Cooper, 1932)
Synonyms
Geographic Distribution
North America, Europe, Siberia, central Asia, North Africa, Australia, China
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:
middle Silurian (Wenlock)
Ending International Stage:
Homerian
Fraction Up In Ending Stage:
100
Ending Date:
426.74
Description
Similar to Glyptorthis but uniplicate with dorsal median sulcus replaced by fold in adult shells, obtuse cardinal extremities, long curved ventral interarea and apsacline dorsal interarea, ventral muscle scar supported by callus, adductor track relatively narrow, expanding anteriorly
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Subphylum:
Rhynchonelliformea
Class:
Rhynchonellata
Order:
Orthida
Suborder:
Orthidina
Superfamily:
Orthoidea
Family:
Glyptorthidae
Formal Genus Name and Reference:
Eridorthis FOERSTE, 1909b, p. 223
Type Species:
Plectorthis (Eridorthis) nicklesi, OD
Images
(Click to enlarge in a new window)
Fig. 530, 2a. *E. nicklesi (Foerste), Caradoc, Kentucky, ventral exterior, X1.5 (Schuchert & Cooper, 1932), Fig. 530, 2b. E. rogerensis Foerste, Caradoc, Kentucky, dorsal exterior, x1.5 (Schuchert & Cooper, 1932)
Synonyms
Geographic Distribution
North America, Europe, Siberia, central Asia, North Africa, Australia, China
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:
middle Silurian (Wenlock)
Ending International Stage:
Homerian
Fraction Up In Ending Stage:
100
Ending Date:
426.74
Description
Similar to Glyptorthis but uniplicate with dorsal median sulcus replaced by fold in adult shells, obtuse cardinal extremities, long curved ventral interarea and apsacline dorsal interarea, ventral muscle scar supported by callus, adductor track relatively narrow, expanding anteriorly