Excalibosaurus

Source: Wikipedia, the free encyclopedia.

Excalibosaurus
Temporal range:
Ma[1]
Fossil, Royal Ontario Museum
Scientific classification
Kingdom:
Animalia
Phylum:
Chordata
Class:
Sauropsida
Order:
†
Ichthyosauria
Family:
Leptonectidae
Genus:
Excalibosaurus

McGowan, 1986
Binomial name
Excalibosaurus costini
McGowan, 1986

Excalibosaurus (meaning "

Ma to 190.8 ± 1.0 Ma (million years ago)) of the Early Jurassic period in what is now England. It is characterized by the extreme elongation of the rostrum, with the lower jaw about three-quarters the length of the upper jaw, giving the animal a swordfish
-like look. The only known species is Excalibosaurus costini.

History of research

Excalibosaurus costini

This relatively rare animal is known from two skeletons. The

Bristol City Museum and Art Gallery. The second specimen is an almost complete skeleton collected in the same area in 1996, and was purchased by the Royal Ontario Museum. It was described again by McGowan in 2003.[3]

Description

The holotype specimen has a skull length of 78.5 cm (2 ft 6.9 in), while the largest specimen has a skull length of 1.54 m (5 ft 1 in).[3] The larger specimen has a total length of 6.528 metres (21.42 ft).[4]

Classification

Excalibosaurus is related to two other genera of ichthyosaurs, Leptonectes from the Rhaetian (Late Triassic) to the Sinemurian (Early Jurassic) of England and Eurhinosaurus from the Toarcian (Early Jurassic) of Germany. The three genera are grouped in the family Leptonectidae.[5][6][3] It was once thought that Excalibosaurus was a junior synonym of Eurhinosaurus,[7] but the description of the 1996 specimen show many morphological differences such as the shape of the forefin (much shorter and broader in Excalibosaurus), the slender shape of the body, that clearly differentiate the two genera.[3]

See also

References

  1. ^ "Excalibosaurus at Fossilworks". Paleobiology Database. Fossilworks. Retrieved 17 December 2021.
  2. S2CID 4255439
    .
  3. ^
    S2CID 129236415
    .
  4. S2CID 13714078. Supplementary Information
  5. doi:10.1127/njgpa/209/1998/47
    .
  6. doi:10.1080/02724634.1999.10011160
    .
  7. ^ Michael W. Maisch & Andreas T. Matzke (2000). "The Ichthyosauria". Stuttgarter Beiträge zur Naturkunde. Serie B. 298: 1–159.
Retrieved from "https://en.wikipedia.org/w/index.php?title=Excalibosaurus&oldid=1171989756"