Eoagnostus

Eoagnostus
Temporal range: terminal Toyonian to early Amgaian (Nephrolenellus multinodus-zone, Ovatoryctocara granulata-zone, earliest Kounamkites-zone)
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Trilobita
Order: Agnostida
Suborder: Agnostina
Superfamily: Agnostoidea
Family: Peronopsidae
Genus: Eoagnostus
Resser and Howell, 1938
species
  • E. roddyi Resser and Howell, 1938 (Type)
  • E. acrorhachis Rasetti and Theokritoff, 1967[1]

Eoagnostus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites. It lived during the terminal Lower Cambrian (Toyonian), until the earliest Middle Cambrian (earliest Kounamkites-zone, part of the lower Amgaian).[1]

Distribution

Description

Almost identical to Archaeagnostus, but the frontal lobe of the central raised area of the cephalon (or glabella) is effaced, while the back of glabella is inflated.[1]

References

  1. 1 2 3 4 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. 1 2 Whittington, H. B. et al. Part O, Treatise on Invertebrate Paleontology. Revised, Volume 1 – Trilobita – Introduction, Order Agnostida, Order Redlichiida. 1997
This article is issued from Wikipedia - version of the Monday, December 16, 2013. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.