Name: Crossoptergii; Osteolepiformes; Osteolepis macrolepidotus
Age: Middle Devonian
Size (25.4 mm = 1 inch): 110 mm in length on 134 mm by 73 mm matrix
Location: Achanarras Horizon, Old Red Sandstone, Orkney Islands, Scotland
Code: 1545
Price: $165.00 - Sold
 Description:
The Osteolepiform fish are thought to be the ancestors of the Tetrapoda
due to their paired fins being homologous to the limbs, and the choanae
(posterior nostril). Osteolepis possessed two rounded dorsal fins
placed posteriorly, and a heterocercal tail with a larger lower lobe.
They have thick rhombic scales covered with a cosmine layer (hence
the shine). Here is a unique opportunity to obtain an example of this
ancient group of fish thought to havbe given rise to the Tetrapod
bauplan. |
