Aphanizocnemus

Aphanizocnemus is an extinct genus of varanoid lizard from Lebanon. It is a marine lizard that lived during the Late Cretaceous. It is often classified in the family Dolichosauridae as a close relative of snakes, although some studies have placed it as an even closer relative to snakes than dolichosaurids. Only one species of Aphanizocnemus is known, the type species A. libanensis. A. libanensis was named in 1997 on the basis of a single complete skeleton.[1] Although the type locality is unknown, it is said to "almost certainly" originate from the Sannine Formation.[2]

The hindlimb of Aphanizocnemus libanensis

Aphanizocnemus
Temporal range: Upper Cretaceous
Fossil of Aphanizocnemus libanensis
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Squamata
Genus: †Aphanizocnemus
Dal Sasso and Pinna, 1997
Species:
†A. libanensis
Binomial name
†Aphanizocnemus libanensis
Dal Sasso and Pinna, 1997

Aphanizocnemus is about 30 centimetres (12 in) long, and the tail makes up half of its length. The hands and feet are very large in comparison to the limb bones. The flattened shape of the phalanges, or finger bones, suggests that the limbs of Aphanizocnemus formed paddles. Long projections of bone in the tail called chevrons give the tail a flattened, paddle-like shape. Aphanizocnemus was well adapted for an aquatic lifestyle, and probably spent much of its time swimming at the bottom of shallow lagoons.[3]

References
  1. Dal Sasso, C.; Pinna, G. (1997). "Aphanizocnemus libanensis n. gen. n. sp., a new dolichosaur (Reptilia, Varanoidea) from the Upper Cretaceous of Lebanon". Paleontologia Lombarda. 7: 1–31.
  2. Campbell Mekarski, Michelle; Pierce, Stephanie E.; Caldwell, Michael W. (2019-09-24). "Spatiotemporal Distributions of Non-ophidian Ophidiomorphs, With Implications for Their Origin, Radiation, and Extinction". Frontiers in Earth Science. 7: 245. doi:10.3389/feart.2019.00245. ISSN 2296-6463.
  3. Molnar, R.E. (2004). "The long and honorable history of monitors and their kin". In Pianka, E.R.; King, D.; King, R.A. (eds.). Varanoid Lizards of the World. Bloomington: Indiana University Press. pp. 10–67.


This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.