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Showing results for tags 'baliactis'.
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From the album: Invertebrates
Baliactis sp. Lower Devonian Emsian Bundenbach Hunsrück Germany- 1 comment
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Could be either B. scutatus Lehmann, 1957, B. tuberatus Lehmann, 1957 or B. devonicus, Spencer, 1927. Taxonomy from Fossilworks.org. Description by Südkamp 2017, p.125: "Baliactis has on the lowersurface the large oval madreporite at the edge of the disc. The mouth-angle plates are long and rather narrow. The evenly tapering arms consist on the dorsal surface of three series of plates (radials, adradials and marginals). At the base of the arms there is a pair of larger adradials that is continued by further adradials in a long series up to the tips of the arms. Besides them run a series of elongate marginals. The robust plates on the dorsal surface carry coarse pustules (name). The ambulacrals on the oral surface are in direct opposition and T-shaped. The adambulacrals are rather narrow, crescent-shaped, and bear small spines." Name meaning: Balios = dappled. References: W.M. Lehmann (1957) Die Asterozoen in den Dachschiefern des rheinischen Unterdevons. Abhandlungen des Hessischen Landesamtes für Bodenforschung 21:1-160. Südkamp, W. (2017): Life in the Devonian. Identification book Hunsrück Slate fossils. Verlag Dr. Friedrich Pfeil. München 2017. ISBN978-3-89937-221-2.
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From the album: Invertebrates
Baliactis sp. Early Devonian Early Emsian Bundenbach Quarry Eschenbach Hunsrück Rhineland-Palatinate Germany-
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