I found them from the Campanian (Upper Cretaceous) shaly beds and guess they belong to echinoderms.
Dear Mr. Ghaderi,
this fossil could be an echinoderm from the Genus Pentacrinus sp.
best regards
Andreas
Echinodermata is the most likely group. How did you seperate from shale, mechanical or chemical process?
Hello Abbas,
echinoderm ossicles indeed, but not Pentacrinus ... your Campanian fossils looks like the basal plates of the roveacrinid Applinocrinus ... you may check for this:
Jagt, J.W.M. (1999): Late Cretaceous-Early Palaeogene echinoderms and the K/T boundary in the southeast Netherlands and northeast Belgium - Part 2: Crinoids. — Scripta Geologica 116: 59-255. (cf. Plate 39, figs. 7-8)
Best wishes,
Mike
Dear Abbas,
these findings, as rightly written by Mike, probably are ossicles of Applinocrinus, a microcrinoid of Upper Cretaceous. To ensure that this is Applinocrinus, you should find or the radial plates or cups, which have a distinctive morphology .
best regards,
Riccardo
Hello Abbas,
These are apical plates of Applinocrinus (Saccocomidae, Roveacrinida). For specific assignment, you should compare to A. ramaraoi (described in India), but most likely to Applinocrinus cretaceus (Bather).
Could you tell us the site of sampling and the associated micro/macrofauna?
Regards
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