Peronopsis

Peronopsis
Temporal range: earliest Mayan to earliest Batyrbayan
Itagnostus interstrictus, until recently known as Peronopsis interstricta, from the Wheeler Shale, Utah
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Trilobita
Order: Agnostida
Suborder: Agnostina
Superfamily: Agnostoidea
Family: Peronopsidae
Genus: Peronopsis
Hawle and Corda, 1847
subgenera[1]
  • Peronopsis (Peronopsis)
  • Peronopsis (Proacadagnostus) Naimark, 2012
  • Peronopsis (Svenax) Öpik, 1979
  • Peronopsis (Vulgagnostus) Naimark, 2012

and see text for species

Peronopsis (meaning "broach-like" or possibly "boot-like"[2]) is a genus of trilobite restricted to the Middle Cambrian. Its remains have been found in Asia, Australia, Europe, and North America.[1]

Etymology

The subgenus Svenax is a contraction of Sven Axel, the given names of the paleontologist Tullberg.

Taxonomy

Position of Peronopsis palmadon

Peronopsis palmadon is intermediate between Peronopsidae and Condylopygidae, but it is not clear whether P. palmadon is ancestral to the Condylopigidae, a condylopigid exhibiting regression towards ancestral characters, or an example of parallel evolution.[1]

Species previously assigned to Peronopsis

Species and distribution

Schematic showing the relationship between the different subgenera of Peronopsis (light green) with other Peronopsid genera (darker green). Unclear is the position of ?Peronopsis palmadon, a transitional form between the agnostoids and the condylopygids.

Subgenus Peronopsis (Peronopsis)

Subgenus Peronopsis (Proacadagnostus)

Subgenus Peronopsis (Svenax)

Subgenus Peronopsis (Vulgagnostus)

Not revised species

These species may be assigned to one of the subgenera later or be reassigned to another genus.

References

  1. 1 2 3 4 5 6 7 8 9 10 Naimark, E.B. (2012). "Hundred species of the Genus Peronopsis Hawle et Corda, 1847". Paleontological Journal. 46 (9): 945–1057. doi:10.1134/S0031030112090018.
  2. Gish, Edmund C. Jaeger ; illustrations by Merle; author, the (1959). A source-book of biological names and terms (3rd ed., rev. ed.). Springfield, Ill.: Thomas. p. 189. ISBN 978-0398061791.
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