Large Triassic Fossil Fish Nodule from Madagascar

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

Triassic FossilDescription: 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.

click fossil images to enlarge

l Fossil Mall Home l Fossils Science Section l