Dipterus Devonian Lung Fish Fossil

from Famous Caithness Scotland

Dipterus valenciennesi

Class Sarcopterygii, Subclass Dipnoi, Order, Dipteriformes, Family Dipteridae

Geological Time: Middle Devonian (~ 385 Million Years Old)

Size: Fish fossil is 153 mm in length on a 175 mm by 65 mm matrix

Fossil Site: Middle Old Red Sanstone, Achanarras Slate Quarry, Caithness, Scotland

Fossil Code: AW107

Price: Sold

Dipterus Devonian Lung Fish FossilDescription: This is a fine example of the first lungfish described in 1828. It is one of the oldest to possess cranial ribs, and is thus believed to have been capable of gulping air, allowing it to extract oxygen directly from the atmosphere. The lungfish arose during the early Devonian, reaching a peak in diversity by the Late Dipterus Devonian Lung FishDevonian. While all early Dipnooans were marine, all known from the Carboniferous on have been freshwater denizens. A few survive today in Africa, South America, and Australia. The shine to the specimen is the result of cosmine, a layer of shiny bony tissue that consists of an external enameloid layer over a dentine layer. Cosmine is thought to have comprised apart of the skin’s complex vascular system. This cosmine layer was lost in most Dipnoan by the Late Devonian in favor of thinner scales. This one was collected in 1979 as the label on the reverse shows. The specimen came up piecemeal, hence the repairs.

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Dipterus valenciennesi
Dipterus valenciennesi

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