Enigmatic Shielia taiti Thelodont Fish Fossil

from the Silurian of Scotland

Shielia taiti

Class Agnatha, Thelodonti, Loganiidae

Geological Time: Upper Silurian

Size: mm (25.4 mm = 1 inch): 54 mm in length (curve measure) on a 75 mm by 85 mm matrix

Fossil Site: Leshmagow, Scotland

Fossil Code: UKF225

Price: Sold

Shielia taiti Thelodont Fish FossilDescription: The Thelodontia are a group of fishes most commonly known from their distinctive tooth-like scales. Indeed the term Thelodont, derived from Greek, means nipple tooth. The teeth have a characteristic crown made of dentine. The scales even on a single specimen are quite variable. Thelodonts are rarely found as complete specimens; those that are show them to be flattened fish, many of which were bottom dwellers. Recent finds of intact specimens from Canada show that they radiated into some deep-bodied forms that swam freely in the water column. These deep-bodied forms may have been more closely allied with jawed fishes than their other relatives. All Thelodonts were extinct by the Upper Devonian. This high-quality specimen that has recently been obtained from a 50 year old collection shows the distinctive scales and is preserved in dorso-lateral aspect. It is the only example of this Thelodont I have seen, and is essentially complete.

Also see: Paleozoic Fish Fossils

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