Ligabueino

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Ligabueino
Temporal occurrence
Lower Cretaceous ( Barremium to Lower Aptian )
130.7 to 123 million years
Locations
Systematics
Dinosaur (dinosauria)
Lizard dinosaur (Saurischia)
Theropoda
Ceratosauria
Abelisauroidea
Ligabueino
Scientific name
Ligabueino
Bonaparte , 1996
species
  • Ligabueino andesi ( Bonaparte, 1996 )

Ligabueino is a little-known genus of small theropod dinosaurs from the Abelisauroidea group . The very incomplete remains come from Argentina and are dated to the Lower Cretaceous ( Barremium to early Aptian ). The only species is Ligabueino andesi .

Ligabueino was first scientifically described by José Fernando Bonaparte in 1996 and bears his name in honor of the Italian businessman and scholar Giancarlo Ligabue .

features

The only known find belonged to an animal about 70 cm long. It was probably a young animal, as indicated by the neural arches separated from the vertebral bodies. Various features show that it belongs to the Abelis auroid group, such as the anteroposterior short spinous processes of the cervical vertebrae.

Systematics

Ligabueino could have been the oldest known representative of the Noasauridae , a group within the Abelisauroidea. This is indicated by the long vertebral centers of the dorsal vertebrae and the shape of an articular knot of the thigh bone. However, clear, jointly derived features ( synapomorphies ) of the Noasauridae cannot be identified, which is why Ligabueino currently has to be listed as a representative of the Abelisauroidea that cannot be further assigned.

Find

The only find ( holotype , specimen number MACN -N-42) comes from the Catán Lil department in the center of the Neuquén province in southern Argentina. The rocks of the site belong to the La Amarga Formation .

The find consists only of a handful of fragmentary bones. The neural arch of a cervical vertebra, the vertebral center of a dorsal vertebra, a complete tail vertebra, most of the right ilium, two fragmented pubic bones, a thigh bone (femur), two phalanxes (phalanges) and other, indeterminable fragments have been passed down.

Individual evidence

  1. ^ A b c Matthew T. Carrano, Scott D. Sampson: The Phylogeny of Ceratosauria (Dinosauria: Theropoda). In: Journal of Systematic Palaeontology. Vol. 6, No. 2, 2008, ISSN  1477-2019 , pp. 183-236, doi : 10.1017 / S1477201907002246 .
  2. ^ José F. Bonaparte : Cretaceous tetrapods of Argentina. In: Munich geoscientific treatises. Row A: Geology and Paleontology. Vol. 30, 1996, ISSN  0177-0950 , pp. 73-130.
  3. ↑ Ben Creisler: Dinosauria Translation and Pronunciation Guide. Archived from the original on July 20, 2011 ; accessed on August 7, 2014 .
  4. ↑ Thomas R. Holtz Jr .: Supplementary Information. to: Thomas R. Holtz Jr .: Dinosaurs. The most complete, up-to-date Encyclopedia for Dinosaur Lovers of all ages. Random House, New York NY 2007, ISBN 978-0-375-82419-7 , online (PDF; 184.08 kB) .
  5. ↑ Matthew T. Carrano, Mark A. Loewen, Joseph JW Sertich: New materials of Masiakasaurus knopfleri Sampson, Carrano, and Forster, 2001, and implications for the morphology of the Noasauridae (Theropoda: Ceratosauria) (= Smithsonian Contributions to Paleobiology. Vol . 95, ISSN  0081-0266 ). Smithsonian Institution Scholarly Press, Washington DC 2011.
  6. ^ A b Rodolfo A. Coria : Nonavian Theropods. In: Zulma Gasparini, Leonardo Salgado, Rodolfo A. Coria (eds.): Patagonian Mesozoic reptiles. Indiana University Press, Bloomington IN et al. 2007, ISBN 978-0-253-34857-9 , pp. 229-256.