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Pseudoperonopsis
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Agnostida
Superfamily:
Agnostoidea
Family:
Spinagnostidae
Formal Genus Name and Reference:
Pseudoperonopsis HARRINGTON, 1938, p. 149
Type Species:
Agnostus sallesi Munier-Chalmas & Bergeron in Bergeron, 1889, p. 337, OD, holotype (MunierChalmas & Bergeron in BERGERON, 1889, pl. 3, fig. 5), not identified
Images
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Fig. 228,2. *P. sallesi (MUNIER-CHALMAS & BERGERON), Middle Cambrian (horizon with Conocoryphe levyi), France (Coulouma, Champs du Travers, Montagne Noire); plesiotype, UM Thoral H24, ×5 (new).
Synonyms
Geographic Distribution
France, Paradoxides beds; Spain, Badulesia to Solenopleuropsis Zones; USA (Utah), B. contracta Subzone; Australia (Queensland), A. atavus to D. notalibrae Zones; China (Liaoning, Shandong), Crepicephalina Zone.
Age Range
Beginning Stage in Treatise Usage:
Middle Cambrian
Beginning International Stage:
Cambrian Stage 4
Fraction Up In Beginning Stage:
0
Beginning Date:
512.3
Ending Stage in Treatise Usage:
Middle Cambrian
Ending International Stage:
Guzhangian
Fraction Up In Ending Stage:
0
Ending Date:
498.75
Description
A trilobite genus with a tendency to efface F1 and F2 furrows of the pygidial axis, deliquiate border furrows, unconstricted acrolobes. The cephalon has a vestigial median preglabellar furrow, and the pygidium is simplimarginate or narrowly zonate with a short, pointed axis and posterolateral spines. It is found in the Middle Cambrian of France, Spain, the USA (Utah), Australia (Queensland), and China (Liaoning, Shandong).
References
Harrington, H. J. 1938. Sobre las faunas del ordoviciano inferior del norte Argentino. Revista del