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Antagmus
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Ptychopariida
Superfamily:
Ptychopariacea
Family:
Ptychopariidae
Formal Genus Name and Reference:
Antagmus RESSER, 1936
Type Species:
A. typicalis (=Ptychoparia tencer Walcott, 1887, non BILLINGS, 1861)
Images
(Click to enlarge in a new window)
Fig. 175, 1. A. gigas Rasetti, Que., cran., x1.5 (448n)
Synonyms
Geographic Distribution
N. Am.
Age Range
Beginning Stage in Treatise Usage:
L.Cam. (“Lower Cambrian” in Trilobite volume of Treatise = current Cambrian Epoch 2 of international scale)
Beginning International Stage:
Cambrian Stage 3
Fraction Up In Beginning Stage:
0
Beginning Date:
521
Ending Stage in Treatise Usage:
L.Cam. (“Lower Cambrian” in Trilobite volume of Treatise = current Cambrian Epoch 2 of international scale)
Ending International Stage:
Cambrian Stage 4
Fraction Up In Ending Stage:
100
Ending Date:
509
Description
Glabella convex, palpebral areas convex, on average horizontal, 0.5 to 0.7 times as wide as glabella at mid-length, palpebral lobes 0.25 to 0.3 as long as glabella, slightly behind glabellar midlength, anterior border furrow with median inbend, anterior sections of facial sutures slightly divergent, posterior areas of fixigenae relatively slender, as wide (tr.) as occipital ring.
References
Museum or Author Information
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Ptychopariida
Superfamily:
Ptychopariacea
Family:
Ptychopariidae
Formal Genus Name and Reference:
Antagmus RESSER, 1936
Type Species:
A. typicalis (=Ptychoparia tencer Walcott, 1887, non BILLINGS, 1861)
Images
(Click to enlarge in a new window)
Fig. 175, 1. A. gigas Rasetti, Que., cran., x1.5 (448n)
Synonyms
Geographic Distribution
N. Am.
Age Range
Beginning Stage in Treatise Usage:
L.Cam. (“Lower Cambrian” in Trilobite volume of Treatise = current Cambrian Epoch 2 of international scale)
Beginning International Stage:
Cambrian Stage 3
Fraction Up In Beginning Stage:
0
Beginning Date:
521
Ending Stage in Treatise Usage:
L.Cam. (“Lower Cambrian” in Trilobite volume of Treatise = current Cambrian Epoch 2 of international scale)
Ending International Stage:
Cambrian Stage 4
Fraction Up In Ending Stage:
100
Ending Date:
509
Description
Glabella convex, palpebral areas convex, on average horizontal, 0.5 to 0.7 times as wide as glabella at mid-length, palpebral lobes 0.25 to 0.3 as long as glabella, slightly behind glabellar midlength, anterior border furrow with median inbend, anterior sections of facial sutures slightly divergent, posterior areas of fixigenae relatively slender, as wide (tr.) as occipital ring.