Largirostrornis

Largirostrornis; Temporal range: Early Cretaceous,
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Dinosauria
Clade:	Saurischia
Clade:	Theropoda
Clade:	Avialae
Clade:	†Enantiornithes
Genus:	†Largirostrornis; Hou, 1997
Species:	†L. sexdentoris
Binomial name
	†Largirostrornis sexdentoris; Hou, 1997

Largirostrornis is a genus of enantiornithean bird. One species has been named, Largirostornis sexdentoris. It lived during the Early Cretaceous and is known from fossils found in the Jiufotang Formation in Liaoning province, People's Republic of China. Some researchers believe this species to be a junior synonym of the similar Cathayornis yandica.[1]

Largirostrornis is known from one fossil, slab and counterslab, found in the Jiufotang Formation in Liaoning province, People's Republic of China. The Jiufotang Formation is dated to the Early Cretaceous period, late Aptian age, 120.3 +/-0.7 million years ago.[2]

The holotype fossil is in the collection of the Institute of Vertebrate Paleontology and Paleoanthropology in Beijing, China. It has been given catalog number IVPP 10531.[3]

L. sexdentornis had in 1997 a torso longer than all other known Enantiornithes. It is slightly larger than Cuspirostrisornis, with a skull about 32 millimeters long. The paired dentaries and premaxillae each hold six teeth. There are tall neural spines on the cervical and dorsal vertebrae.[3]

Etymology

The species was named and described by Hou Lianhai in 1997.[3] The genus name comes from the Latin words largus, "large" and rostrum, "beak", and the specific name means "six-toothed" from Latin sex and dens.

References

Zhou Z. and Wang Y. (2010). "Vertebrate diversity of the Jehol Biota as compared with other lagerstätten." Science China: Earth Sciences, 53(12): 1894–1907. doi:10.1007/s11430-010-4094-9 Archived 2013-10-29 at the Wayback Machine
He, H.Y., Wang, X.L., Zhou, Z.H., Wang, F., Boven, A., Shi, G.H., Zhu R.X. (2004). "Timing of the Jiufotang Formation (Jehol Group) in Liaoning, northeastern China, and its implications". Geophysical Research Letters 31(13): 1709.
Hou, Lianhai (1997) "Mesozoic Birds of China" Institute of Vertebrate Paleontology and Paleoanthropology, Beijing, China. Published by the Phoenix Valley Provincial Aviary of Taiwan. In Chinese, translated by Will Downs, Bilby Research Center, Northern Arizona University, January, 2001.

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[zhou&wang2010-1] Zhou Z. and Wang Y. (2010). "Vertebrate diversity of the Jehol Biota as compared with other lagerstätten." Science China: Earth Sciences, 53(12): 1894–1907. doi:10.1007/s11430-010-4094-9 Archived 2013-10-29 at the Wayback Machine

[Heetal2004-2] He, H.Y., Wang, X.L., Zhou, Z.H., Wang, F., Boven, A., Shi, G.H., Zhu R.X. (2004). "Timing of the Jiufotang Formation (Jehol Group) in Liaoning, northeastern China, and its implications". Geophysical Research Letters 31(13): 1709.

[Hou1997-3] Hou, Lianhai (1997) "Mesozoic Birds of China" Institute of Vertebrate Paleontology and Paleoanthropology, Beijing, China. Published by the Phoenix Valley Provincial Aviary of Taiwan. In Chinese, translated by Will Downs, Bilby Research Center, Northern Arizona University, January, 2001.