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Missisquoia
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Uncertain
Superfamily:
Phacopacea
Family:
Missisquoiidae
Formal Genus Name and Reference:
Missisquoia SHAW, 1951
Type Species:
M. typicalis
Images
(Click to enlarge in a new window)
Fig. 403. *M. typicalis, Vt., a, b, ceph., pyg., x6 (471).
Synonyms
Geographic Distribution
E.N.Am.
Age Range
Beginning Stage in Treatise Usage:
L.Ord.(Tremadoc)
Beginning International Stage:
Tremadocian
Fraction Up In Beginning Stage:
0
Beginning Date:
486.85
Ending Stage in Treatise Usage:
L.Ord.(Tremadoc)
Ending International Stage:
Tremadocian
Fraction Up In Ending Stage:
0
Ending Date:
477.08
Description
Glabella parallel-sided to tapering, front broadly rounded with median notch and 3 or 4 pairs of short deep lateral furrows at sides, eyes slightly below medium size, opposite center of glabella, no preglabellar field, curved anterior border furrow meeting preglabellar furrow, anterior border narrow, fixigenae with palpebral areas a little less than 0.5 of glabellar width, posterior areas about 0.7 of length (tr.) of occipital ring. Pygidium with axis showing 7 or 8 axial rings and terminal continued into median terminal spine, pleurae 6, separated by narrow shallow interpleural grooves and crossed by broad deep pleural furrows to margin, terminating in short marginal spines. Outer surface finely granulose.
References
Museum or Author Information
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Uncertain
Superfamily:
Phacopacea
Family:
Missisquoiidae
Formal Genus Name and Reference:
Missisquoia SHAW, 1951
Type Species:
M. typicalis
Images
(Click to enlarge in a new window)
Fig. 403. *M. typicalis, Vt., a, b, ceph., pyg., x6 (471).
Synonyms
Geographic Distribution
E.N.Am.
Age Range
Beginning Stage in Treatise Usage:
L.Ord.(Tremadoc)
Beginning International Stage:
Tremadocian
Fraction Up In Beginning Stage:
0
Beginning Date:
486.85
Ending Stage in Treatise Usage:
L.Ord.(Tremadoc)
Ending International Stage:
Tremadocian
Fraction Up In Ending Stage:
0
Ending Date:
477.08
Description
Glabella parallel-sided to tapering, front broadly rounded with median notch and 3 or 4 pairs of short deep lateral furrows at sides, eyes slightly below medium size, opposite center of glabella, no preglabellar field, curved anterior border furrow meeting preglabellar furrow, anterior border narrow, fixigenae with palpebral areas a little less than 0.5 of glabellar width, posterior areas about 0.7 of length (tr.) of occipital ring. Pygidium with axis showing 7 or 8 axial rings and terminal continued into median terminal spine, pleurae 6, separated by narrow shallow interpleural grooves and crossed by broad deep pleural furrows to margin, terminating in short marginal spines. Outer surface finely granulose.