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Isoteloides
Classification
Phylum:
Arthropoda
Subphylum:
Trilobitomorpha
Class:
Trilobita
Order:
Ptychopariida
Suborder:
Asaphina
Family:
Asaphidae
Subfamily:
Isotelinae - Group A
Formal Genus Name and Reference:
Isoteloides RAYMOND, 1910
Type Species:
*I. whitfieldi
Images
(Click to enlarge in a new window)
Fig. 251, 1. *l. whitfieldi, 1 a, carapace (reconstr.), x2 (414n), 1 b, hypostoma, x2 (414n).
Synonyms
Geographic Distribution
N.Am.-Greenl.
Age Range
Beginning Stage in Treatise Usage:
L.Ord.(U. Canad.)
Beginning International Stage:
Floian
Fraction Up In Beginning Stage:
0
Beginning Date:
477.08
Ending Stage in Treatise Usage:
L.Ord.(U. Canad.)
Ending International Stage:
Floian
Fraction Up In Ending Stage:
100
Ending Date:
471.26
Description
Cephalon and pygidium with well-defined, flattened border, frontal area moderately long, in type species slightly shorter than 0.25 of total length of cephalon, glabella rather well defined, slightly expanding in front of moderately large eyes situated at about transverse mid-line of cephalon, faint posterior border furrow may be present, genal angles produced into spines. Hypostoma in type species with broadly rounded lateral margin and broad (tr.) notch in posterior margin. Thoracic axis about as broad as pleurae. Pygidial axis rather well defined, moderately broad, pleural fields in type species with faint ribs.
References
Museum or Author Information
Classification
Phylum:
Arthropoda
Subphylum:
Trilobitomorpha
Class:
Trilobita
Order:
Ptychopariida
Suborder:
Asaphina
Family:
Asaphidae
Subfamily:
Isotelinae - Group A
Formal Genus Name and Reference:
Isoteloides RAYMOND, 1910
Type Species:
*I. whitfieldi
Images
(Click to enlarge in a new window)
Fig. 251, 1. *l. whitfieldi, 1 a, carapace (reconstr.), x2 (414n), 1 b, hypostoma, x2 (414n).
Synonyms
Geographic Distribution
N.Am.-Greenl.
Age Range
Beginning Stage in Treatise Usage:
L.Ord.(U. Canad.)
Beginning International Stage:
Floian
Fraction Up In Beginning Stage:
0
Beginning Date:
477.08
Ending Stage in Treatise Usage:
L.Ord.(U. Canad.)
Ending International Stage:
Floian
Fraction Up In Ending Stage:
100
Ending Date:
471.26
Description
Cephalon and pygidium with well-defined, flattened border, frontal area moderately long, in type species slightly shorter than 0.25 of total length of cephalon, glabella rather well defined, slightly expanding in front of moderately large eyes situated at about transverse mid-line of cephalon, faint posterior border furrow may be present, genal angles produced into spines. Hypostoma in type species with broadly rounded lateral margin and broad (tr.) notch in posterior margin. Thoracic axis about as broad as pleurae. Pygidial axis rather well defined, moderately broad, pleural fields in type species with faint ribs.