Name:
Chondrostei; Palaeonisciformes, Bobastraniidae, Encrinesomus dixoni
Age: Early
Triassic (~240 m.y.a.)
Size (25.4
mm = 1 inch): 106 mm long, 75 mm tall Matrix: 120 mm by 93 mm
Location:
Ambilobe, Madagascar
Description:
A fine example of a nodule from the early Triassic of Madagascar
containing most of a very detailed fish known as Encrinesomus dixoni.
This one is thought to have been a still-water grazer on plants.
Note
the incredible detail preserved here, down to the rhombic scales
and the finnage. Unlike most nodules, this one is a natural cast
of the fish, displaying the left and right sides with remarkable
fidelity. This one is missing only the distalmost portion of the
caudal fin, a fine example of a genus that went extinct during the
late Triassic.
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