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Spanodonta
Classification
Phylum:
Brachiopoda
Class:
Strophomenata
Order:
Strophomenida
Superfamily:
Plectambonitoidea
Family:
Taffiidae
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, $\\mathbf{X}$, $c, d$, 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
Class:
Strophomenata
Order:
Strophomenida
Superfamily:
Plectambonitoidea
Family:
Taffiidae
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, $\\mathbf{X}$, $c, d$, 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