Archaeaspis
From Wikipedia, the free encyclopedia
| Archaeaspis Temporal range: | |
|---|---|
 | |
| Reconstruction of A. hupei | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Clade: | †Artiopoda |
| Class: | †Trilobita |
| Order: | †Redlichiida |
| Family: | †Archaeaspididae |
| Genus: | †Archaeaspis Repina in Khomentovskii and Repina, 1965[1] non Archaeaspis Ivantsov, 2001[2] = Archaeaspinus Ivantsov, 2007 |
| Species | |
Archaeaspis is an extinct genus of redlichiid trilobites. It lived during the late Atdabanian stage,[3] which lasted from 521 to 514 million years ago during the early part of the Cambrian Period. The first specimens were first found in Siberia, where they were originally thought to have been endemic. Later, though, more specimen were found in the Inyo Mountains in Southern California.[4] An Ediacarian proarticulatan was given the same name, Archaeaspis Ivantsov, 2001. This is however a junior homonym. The name Archaeaspis Repina in Khomentovskii and Repina, 1965, for the trilobite has priority. The new valid name for the proarticulate is Archaeaspinus Ivantsov, 2007.[5]
The genus name is the combination of the Ancient Greek ἀρχαῖος (archaīos) meaning "ancient" and ἀσπίς (aspis) meaning "shield". The names of the species have the following derivations.
- A. hupei is named in honor of Pierre Hupé, a distinguished French paleontologist.
- A. nelsoni in named in honor of Clem Nelson, emeritus professor, who worked at the University of California at Los Angeles, and at the White Mountain Research Station. He collected the material the specimens the description of this species is based upon.[1]
- A. macropleuron is the combination of the Greek words μακρος (makros) meaning "large" and πλευρών (pleuron) meaning "rib", named for the macropleural spine of the 3rd thorax segment in this species.[1]
Distribution
- A. hupei is found on the Siberian platform.[6]
- A. nelsoni was collected in the Lower Cambrian of California, USA (probably Nevadella-zone), Inyo County; on a small hill just south of the east-west road leading to Silver Canyon, Montenegro Member of the Campito Formation, Blanco Mountains; and on a south facing dip slope on the North side of a small east-west canyon on the east side of the road, Campito Formation, near Bishop.[1]
- A. macropleuron occurs in the Lower Cambrian of California, USA (probably Nevadella-zone), Inyo County; on a small hill just south of the east-west road leading to Silver Canyon, Montenegro Member of the Campito Formation, Blanco Mountains; Campito Formation near Waucoba Springs.[1]