Search the Community
Showing results for tags 'rhinopteraspid'.
-
Details of two Rhinopteraspid Fish's Ventral Preoral Regions
Biotalker posted a topic in General Fossil Discussion
I thought I would share this recent fossil purchase. I was fortunate to obtain this fossil from the lower Devonian in the southwestern region (Podolia) of Ukraine. Two ventral snout regions of type of heterostracan (jawless) fish called rhinopteraspid are exposed. The bone detail is simply remarkable. There is “tiling” of the underside of the long (rhino) snouts with dentine and/or aspidine (acellular enamel-like substance) in parallel lines arrays with a more uniform bone matrix underneath. The pre-oral-plate is angled in toward the mouth and displays many external textures of bone that presumably aided the fish’s feeding. I didn't expect to see this level of detail.- 4 replies
-
- 2
-
- heterostracan
- lochkovian
- (and 6 more)