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Spanodonta
Classification
Phylum:
Brachiopoda
Subphylum:
Rhynchonelliformea
Class:
Strophomenata
Order:
Strophomenida
Superfamily:
Plectambonitoidea
Family:
Taffiidae
Subfamily:
Taffiinae
Formal Genus Name and Reference:
Spanodonta PRENDERGAST, 1935, p. 12
Type Species:
S. hoskingiae, OD
Images
(Click to enlarge in a new window)
Fig. 201, 3a-d. *S. hoskingiae, Gap Creek Formation, LlanvirnLlandeilo, Gap Spring, Price's Creek, Emmanuel Range, Western Australia, a, ventral exterior, BMNH BC 10604, X4, b, conjoined valves showing ventral interior, BMNH BC 7242, X, c, d, dorsal interior, BMNH BC 10605, X3 (Cocks & Rong, 1989).
Synonyms
Archambona
Geographic Distribution
Australia, Malaya
Age Range
Beginning Stage in Treatise Usage:
Ordovician (Llanvirn)
Beginning International Stage:
Dapingian
Fraction Up In Beginning Stage:
0
Beginning Date:
471.26
Ending Stage in Treatise Usage:
Ordovician (Llandeilo)
Ending International Stage:
Darriwilian
Fraction Up In Ending Stage:
100
Ending Date:
458.18
Description
Concavoconvex profile, fine unequally parvicostellate ornament, ventral interarea apsacline, dorsal hypercline, pseudodeltidium, chilidium apparently vestigial, short dental plates, muscle-bounding ridges mostly surrounding bilobed ventral muscle field, cardinal process not trilobed, consists of simple ridge, prominent socket ridges curved anterolaterally, distinctive dalmanelloid-like dorsal muscle field, with median septum, transverse ridge separating two pairs of muscle scars, prominent dorsal subperipheral rim
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Subphylum:
Rhynchonelliformea
Class:
Strophomenata
Order:
Strophomenida
Superfamily:
Plectambonitoidea
Family:
Taffiidae
Subfamily:
Taffiinae
Formal Genus Name and Reference:
Spanodonta PRENDERGAST, 1935, p. 12
Type Species:
S. hoskingiae, OD
Images
(Click to enlarge in a new window)
Fig. 201, 3a-d. *S. hoskingiae, Gap Creek Formation, LlanvirnLlandeilo, Gap Spring, Price's Creek, Emmanuel Range, Western Australia, a, ventral exterior, BMNH BC 10604, X4, b, conjoined valves showing ventral interior, BMNH BC 7242, X, c, d, dorsal interior, BMNH BC 10605, X3 (Cocks & Rong, 1989).
Synonyms
Archambona
Geographic Distribution
Australia, Malaya
Age Range
Beginning Stage in Treatise Usage:
Ordovician (Llanvirn)
Beginning International Stage:
Dapingian
Fraction Up In Beginning Stage:
0
Beginning Date:
471.26
Ending Stage in Treatise Usage:
Ordovician (Llandeilo)
Ending International Stage:
Darriwilian
Fraction Up In Ending Stage:
100
Ending Date:
458.18
Description
Concavoconvex profile, fine unequally parvicostellate ornament, ventral interarea apsacline, dorsal hypercline, pseudodeltidium, chilidium apparently vestigial, short dental plates, muscle-bounding ridges mostly surrounding bilobed ventral muscle field, cardinal process not trilobed, consists of simple ridge, prominent socket ridges curved anterolaterally, distinctive dalmanelloid-like dorsal muscle field, with median septum, transverse ridge separating two pairs of muscle scars, prominent dorsal subperipheral rim