原始棘皮动物 - soluta!!! - 动物化石 - Syringocrinus paradoxicus (Billings, 1859) - 19 cm - 12 cm
编号 78776413
非常罕见的澳大利亚异形菊石 - 动物化石 - Tonohamites (toxaceratoides) taloryi (ETHERIDGE, 1892)
编号 78776413
非常罕见的澳大利亚异形菊石 - 动物化石 - Tonohamites (toxaceratoides) taloryi (ETHERIDGE, 1892)
An excellent example of a rare Australian uncoiled (heteromorph) ammonite.
The specimen retains much of it’s calcite exoskeleton.
Such ammonites are perhaps one of the most aesthetically pleasing of all cephalopods.
While most ammonites have spiral shells that retain the same shape throughout growth (homomorph), the major group of Ancyloceratina, that appeared during the Late Jurassic had these uncoiled shells instead, and were called heteromorph ammonites (meaning, different-shaped).
Ammonite is 4,2 cm large
Tonohamites (toxaceratoides) taloryi (ETHERIDGE, 1892)
Aptian
Wallumbilla Fmt
Walsh River- Queensland, Australia
Fantastic specimen, a "must piece" for all the Ammonite Lovers.