Tchernyshevioides is a diminutive trilobite that lived during the early Middle Cambrian (Amgaian) and has been found in the Russian Federation (Pseudanomocarina-zone, Sulyukta region, Tian-Shan) and the Jbel Wawrmast Formation of Morocco.[1]
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| a drawing of a Tchernyshevioides ninae, based on specimens from Tian-Shan (Sulyukta region) Siberia | |
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| Genus: | Tchernyshevioides Hajrullina 1975
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Etymology
editTchernyshevioides has been named in honor of the Russian paleontologist N.E. Tchernysheva.
Description
editThe central raised area (or glabella) of the headshield (or cephalon) is long and reaches the anterior border furrow. The occipital ring is well defined and carries a long posterdorsal spine. Otherwise the glabella has no transverse furrows. The border furrow is distinct and the border wide. The free cheeks (or librigenae) are very short. The cephalic angle carries a slender spine of almost equal length as the glabella, directed backwards and outwards at about 45°. The thorax is unknown. Pygidium with axis of six rings plus terminus. There are five well defined pleural furrows and the border is narrow and smooth.[1]
References
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