Saarina
| Saarina Temporal range: Ediacaran to Cambrian, about 558–535Ma |
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| A fossil of Saarina juliae | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | incertae sedis |
| Family: | Saarinidae Sokolov, 1965 |
| Genus: | Saarina Sokolov, 1965 |
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Saarina are tube fossils from the Ediacaran (Vendian) and Early Cambrian marine deposites of the European Russia. This fossils are comparable to the dwelling tubes of worms or cnidarians.
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Occurrence [edit]
Fossils of the type species, S. tenera, were found in a core from the Gatchina №13 borehole in the Leningrad Region, Russia. The deposites with this fossil are referred to the Rovno Horizon, lowermost Cambrian (=Fortunian Stage)
S. kirsanovi fossils were found in core from the Vorob'evo №1 borehole, Moscow Region and in core from the Malinovka borehole, near Obozersky in the Arkhangelsk Region.
S. juliae was found in core from the Gavrilov-Yam №5 borehole, Yaroslavl Region. The deposites with S. kirsanovi and S. juliae are referred to the Redkino Horizon, Upper Vendian (Ediacaran), and aged about 558 mya.
Description [edit]
The fossils are found in a mudstone and preserved in the form of flat pyrite ribbons as a result of superficial pyritization on early stage of organic decomposition.
Saarina tubes were cylindrical form, conical at the base, consisting of funnel-shaped narrow rings. The wall of the tube was thin, originally organic-walled, not chitinous. The tubes up to a width of 7 mm.
The species of the Saarina are differed mainly in the form of funnels:
- S. tenera have a straight conical funnels.
- S. juliae have a conical funnels, curved outward.
- S. kirsanovi have a funnels curved inward.
See also [edit]
References [edit]
- Gnilovskaya, M. B. (1996). "New saarinids from the Vendian of the Russian Platform". Dokl. Ross. Akad. Nauk 348: 89–93.
