Paraplacodus

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Paraplacodus
Temporal range: Middle Triassic
Paraplacodus broili.JPG
Fossil
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Superorder: Sauropterygia
Order: Placodontia
Genus: Paraplacodus
Peyer, 1931
Species
  • P. broilli Peyer, 1931 (type)

Paraplacodus was a Placodont from the middle Triassic period, during the Anisian to Ladinian stages. The fossils were uncovered in Northern Italy and the species was named in 1931 by Bernhard Peyer. Paraplacodus means "Almost Placodus", and thus far only one species, P. broilli, has been identified, although as the name suggests, it was similar to Placodus, and also bore a strong resemblance to Saurosphargis.

Restoration
Paraplacodus broili fossil

Like all known Placodonts, Paraplacodus was an aquatic reptile that fed almost exclusively on shellfish. Most known Placodont species can be divided into two groups - the unarmored placodontoids, which would resemble a large, scaly, tooth-filled newt, or the armored cyamodontids, which would resemble a heavily armored turtle; Paraplacodus would have been in the newt-like family, but grew to a length of 1.5 meters (4.9 feet).

The jaws of Paraplacodus were adapted to eat shellfish, with three pairs of protruding teeth in the top row and two rows of protruding teeth in the front of the jaw, with rounded crushing teeth in the upper and lower jaws. Thick ribs formed a box-like ribcage with an almost-square cross-section, which enabled Paraplacodus to remain close to the seabed while hunting for food.

References[edit]

Dixon, Dougal. "The Complete Book of Dinosaurs." Hermes House, 2006.