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Tetraodontella
Classification
Phylum:
Brachiopoda
Class:
Strophomenata
Order:
Strophomenida
Superfamily:
Plectambonitoidea
Family:
Grorudiidae
Formal Genus Name and Reference:
Tetraodontella JANUSSON, 1962, p. 1
Type Species:
T. biseptata, OD
Images
(Click to enlarge in a new window)
Fig. 213, 2a-c. *T. biseptata, Dalby Limestone, middle Caradoc, Böda Hamn borehole, Öland, Sweden, $a$, holotype, ventral exterior, RMS Öl 1040, x5, b$, ventral interior, RMS Öl 1037, X, $c$, dorsal interior, $X_{4}$ (Williams, 1965d)."
Synonyms
Geographic Distribution
Baltic, China
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 (Caradoc)
Ending International Stage:
Katian
Fraction Up In Ending Stage:
66.7
Ending Date:
447.72
Description
Strongly concavoconvex profile, unequally parvicostellate ornament, small pseudodeltidium, small teeth, dental plates, relatively small ventral muscle field, dorsal interior as in Calyptolepta but with strong central pair of septa fused together along their length, homologizing a wide median septum, except where they divide anteriorly, further short side septa constrained within muscle field, bema, weak platform present
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Class:
Strophomenata
Order:
Strophomenida
Superfamily:
Plectambonitoidea
Family:
Grorudiidae
Formal Genus Name and Reference:
Tetraodontella JANUSSON, 1962, p. 1
Type Species:
T. biseptata, OD
Images
(Click to enlarge in a new window)
Fig. 213, 2a-c. *T. biseptata, Dalby Limestone, middle Caradoc, Böda Hamn borehole, Öland, Sweden, $a$, holotype, ventral exterior, RMS Öl 1040, x5, b$, ventral interior, RMS Öl 1037, X, $c$, dorsal interior, $X_{4}$ (Williams, 1965d)."
Synonyms
Geographic Distribution
Baltic, China
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 (Caradoc)
Ending International Stage:
Katian
Fraction Up In Ending Stage:
66.7
Ending Date:
447.72
Description
Strongly concavoconvex profile, unequally parvicostellate ornament, small pseudodeltidium, small teeth, dental plates, relatively small ventral muscle field, dorsal interior as in Calyptolepta but with strong central pair of septa fused together along their length, homologizing a wide median septum, except where they divide anteriorly, further short side septa constrained within muscle field, bema, weak platform present