admonished - Fossilised animal - cleoniceras + cleoniceras con ematite - 160 mm - 125 mm

An extremely important fossil group dating from the Devonian-Cretaceous period. Completely extinct by the end of the Cretaceous, it is thought to derive from ancestors belonging to Nautiloidea. Although part of the cephalopod mollusk group, Cleoniceras stands out mainly for the shape of the shell, characterized by bilateral symmetry. The shell is divided into an undivided anterior region where the animal resided and a posterior region divided into chambers. The line of closure between the chambers is highly indicative and helps in recognizing the species. Moreover, its outline, in the early forms rather simple and linear, gradually evolved into the ammonites more recent where it is often very jagged and almost baroque. Sizes vary: starting from a few cm but can reach up to 10 cm. Since these are entirely extinct marine species, we can only hypothesize their lifestyle. It is believed that forms with smooth externally shells were swimmers, often predators. Species with more ribbed and ornamented shells were predominantly benthic.
Unmissable lot consisting of two splendid Cleoniceras specimens, one with a dark color typical of hematite.
Observing the external part of these beautiful fossils, the characteristic sutural lines of the species are clearly visible, intertwining in a pattern that recalls the sinuous movements of flames.
Two true masterpieces.
Cleoniceras: 125mm x 160mm x 40 mm
Cleoniceras with hematite: 123mm x 155mm x 35 mm.
Pedestals not included.