Edelsteinaspis (lat.) Is a genus of Lower Cambrian trilobites from the family Edelsteinaspididae of the order Corynexochida , the fossil remains of which are found almost everywhere on the Siberian platform , as well as in the Altai Republic , Western Sayan , Kuznetsk Alatau , Transbaikalia and China in the deposits of the Toyon layer [1] ] .
| † Edelsteinaspis | |||||||||||||||||||||||||||||||||||||||||
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| International scientific name | |||||||||||||||||||||||||||||||||||||||||
Edelsteinaspis Lermontova, 1940 | |||||||||||||||||||||||||||||||||||||||||
| Geochronology 516-513 Ma
◄ Nowadays◄ Cretaceous-Paleogene extinction◄ Triassic extinction◄ Mass Permian Extinction◄ Devonian extinction◄ Ordovician-Silurian extinction◄ Cambrian explosion | |||||||||||||||||||||||||||||||||||||||||
Etymology
The genus is named after the Soviet geologist and geographer Jacob Samoilovich Edelstein .
Description
The front edge rim is bent up. The pygidium is wide and consists of 57 distinct segments. It has fourteen trunk segments. The tail shields are semi-elliptical in shape, consisting of seven rings with sharp interpleural and pleural grooves, with a wide flattened rim. The teeth on the marginal border of the tail shield are absent. Glabellar furrow bent back. Has a sharply drawn front glabella blade. The posterior branches of the facial sutures are very long [2] [3] .
He was a nectobenthic predator [1] [3] .
Distribution
The genus is known from sediments of the Sinskaya , Usiiskaya , Uyarskaya , Torgashinskaya , Suus, and Shuaninshan formations [1] .
Systematics
The type species Edelsteinaspis ornata was described by Ekaterina Vladimirovna Lermontova in 1940 [1] .
The genus includes the following extinct species [2] :
- Edelsteinaspis altaica E. Romanenko, 1978
- Edelsteinaspis generosa Repina, 1973
- Edelsteinaspis gracilis Lermontova in Suvorova, 1964
- Edelsteinaspis ornata Lermontova, 1940 typus
- Edelsteinaspis paraornata Jegorova, 1976
- Edelsteinaspis plana N. Tchernysheva, 1961
Notes
- ↑ 1 2 3 4 Edelsteinaspis (English) information on the Paleobiology Database website.
- ↑ 1 2 3 Pokrovskaya N.V. Trilobite fauna and stratigraphy of the Cambrian deposits of Tuva / resp. ed. N. S. Zaitsev. - M .: Publishing House of the Academy of Sciences of the USSR, 1959.
- ↑ 1 2 Ivantsov A. Yu., Zhuravlev A. Yu., Krasilov V.A., Leguta A.V., Melnikova L.M., Urbanek A., Ushatinskaya G.T., Malakhovskaya Ya. E. Unique Sinsky Locations of Early Cambrian organisms (Siberian platform) / Res. ed. A. G. Ponomarenko. - M .: Nauka, 2005 .-- 143 p. - ISBN 5-02-033692-0 .