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The transcription of the Russian terms and names is often ambiguous. In the literature the locality and the formation is called both Tsurevskii or Tsurevskiy. The Russian spelling is Цуревский. Taxonomy from Baykina 2012. Diagnosis for Illusionella (after Baykina 2012, p. 304): "Skull narrow; bulla prootica 2– 2.5 times as large as bulla pterotica; frontals smooth; maxilla saber-shaped, with distinctly convex lower margin, terminating short of reaching vertical through orbital center; posterior supramaxilla in shape of irregular parallelogram; hypomaxilla absent; lower jaw projecting considerably anterior to upper jaw; mandibular joint in line with vertical of anterior orbital border or just behind it; jaw bones lacking teeth; subopercle long, with well-developed process; rami of preopercle almost equal in length, horizontal ramus considerably narrower than vertical ramus; opercle subrectangular, smooth; branchial membrane with seven rays; vertebrae 44–50 in number; dorsal fin located slightly anterior to vertical of body midlength; abdominal fins located opposite middle of dorsal fin base or under its posterior one-third; anal fin displaced far towards tail; two posterior rays of anal fin elongate; caudal fin with two epurals; ventral carina very poorly developed." Line drawing from Baykina 2012: Identified according to Baykina, 2012: The two posterior elongate rays of the anal fin are characteristic for Illusionella. Reference: Baykina, E. M. (2012): A New Clupeid Genus (Pisces, Clupeiformes, Clupeidae) from the Sarmatian of the Eastern Paratethys, Krasnodar Region. Paleontological Journal, 2012, Vol. 46, No. 3, pp. 302–312.
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- illusionella
- krasnodar
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400 Million years in 4 hours The small-scale geology of Austria makes it possible to observe and collect invertebrate marine fossils from a time span of nearly 400 Million years (Ma) within a few hours and at a distance of only about 10 km: - 395 Ma old Devonian (Eifelian) corals - Ölberg - 80 Ma old Cretaceous (Campanian) rudists – St. Bartholomä - 12 Ma old Miocene (Serravallian/Sarmatian) gastropods - Waldhof I did this special hunting trip west of Graz at October 22, 2019 as a "feasibility study". The youngest and oldest fossils can simply be picked from the ground (or photographed); the “middle-agers” require some searching; I succeeded to find a few good specimens within one hour. Weather was perfect with nearly 25°C (!). Simplified geological map of Styria with the visited area west of Graz (red rectangle). Geological map of the visited area (1:50.000), composed of two adjoining map sheets. Red numbers denote visited fossil sites (and their age in Million years). Note the fossil sign in the blue formation in the upper middle of the map. This is the upper Devonian Steinberg-formation with goniatites. These fossils are not abundant, though, so I have never explored this hill… Topo map of the area. Red numbers denote fossil sites, A and B are sites of landscape pics. Just to show off some landscape: View from point “A” in Steinberg towards west. K = Kreuzegg mountain (570 m, Campanian St. Bartholomä-formation) at a distance of ca. 5 km. A = Plateau-like Amering mountain (2187 m, high-grade metamorphic rocks) at a distance of ca. 40 km. View from point “B” at Kreuzegg mountain towards north to southeast. Pano composed of 4 individual pics, spanning about 140°. Labeled mountains and hills in the background are: S = Schöckl (1445 m, Devonian epimetamorphic limestone) at a distance of ca. 20 km. P = Plabutsch mountain (754 m, namesake of the fossil-rich Eifelian Plabutsch-formation) and B = Buchkogel mountain (656 m), both at distance of ca. 10 km and located immediately to the west of Graz. Ölberg and Waldhof sites are between P and B, but not visible. Note the about 1000 m high, largely deforested mountains at the left side of the pano (Mühlberg, Pleschkogel etc., lower Devonian, dolomitic Flösserkogel-formation). The severe deforestation of these hills is due to a strong storm in 2008 (“Paula”). Continued...
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- campanian
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