Angustinaripterus (lat.) Is a genus of pterosaurs from the subfamily Rhamphorhynchinae of the family Rhamphorhynchidae , who lived in the Middle Jurassic era ( Bajo – Callovian , 170.3-163.5 Ma ago) [1] . Fossil remains are found in the Dashanpu formation, near the city of Zigong ( Sichuan , China ).
| † Angustinaripterus |
Reconstruction |
| Scientific classification |
|---|
| No rank : | Bilateral symmetric |
| Infraclass : | Archosauromorphs |
| No rank : | Archosauriformes |
| Hoard : | † Pterosaurromorphs ( Pterosauromorpha Padian, 1997 ) |
| Family: | † Rhamphorhynchidae |
| Subfamily : | † Rhamphorhynchinae |
| Gender: | † Angustinaripterus |
|
| International Scientific Name |
|---|
Angustinaripterus He et al. 1983 |
| Single view |
|---|
† Angustinaripterus longicephalus
He et al. 1983 |
Geochronology170.3-163.5 Ma | million years | Period | Era | Eon |
|---|
| 2.588 | Even | | | Ka | F
but
n
e
R
about
s
about
th | | 23.03 | Neogene | | 66.0 | Paleogene | | 145.5 | a piece of chalk | M
e
s
about
s
about
th | | 199.6 | Yura | | 251 | Triassic | | 299 | Permian | P
but
l
e
about
s
about
th | | 359.2 | Carbon | | 416 | Devonian | | 443.7 | Silur | | 488.3 | Ordovician | | 542 | Cambrian | | 4570 | Precambrian |
◄ Nowadays◄ Cretaceous-Paleogene extinction◄ Triassic extinction◄ Perm mass extinction◄ Devonian extinction◄ Ordovician-Silurian extinction◄ Cambrian explosion |
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Content
The name was given in 1983 by the Chinese paleontologist He Xinlu. The typical and only species is Angustinaripterus longicephalus . The name of the genus comes from lat. angustus is “narrow” and naris is “nostril”, and also from the Latinized Greek word πτερόν is “wing”. The specific name comes from lat. longus - “long” and others. Greek. Κεφάλος - “head”.
The holotype ZDM T8001 is a skull with a lower jaw, discovered in 1981 by scientists from the Zigong History Museum of the Salt Industry in the Xiashaximiao Formation. The skull, the left side of which is badly damaged, is very elongated and flat. The back is missing; in canned form, it has a length of 192 mm; total length in full condition is estimated at 201 millimeters. The top of the skull carries a small crest, two to three millimeters high. The nostrils are long, slit-like, located above and in front of the large preorbital foramen with which they do not merge. The jaws were straight; their front part is absent. There are six pairs of teeth in the jaw, and three more pairs of teeth are located in the premaxilla . The lower jaw carries at least 10-12 pairs of teeth. The posterior teeth are small, the anterior teeth are very long, strong and curved, interlocking and directed forward. They were probably used to snatch fish from the water surface. The teeth of Angustinaripterus resemble those of Dorygnathus .
Peter Wellnhofer in 1991 estimated the length of the skull at 16.5 centimeters, and the wingspan - at 1.6 meters.
He Xinlu related this genus to the family Rhamphorhynchidae [2] . Due to morphology and great geographical distribution compared to European forms, the scientist also created a special subfamily Angustinaripterinae, in which Angustinaripterus itself is the only known representative. He also concluded that Angustinaripterus is directly related to Scaphognathinae . In 2003, David Anvin assigned this pterosaur to another group - Rhamphorhynchinae [3] , which has been repeatedly confirmed by other studies [4] .
- Pterosaur list
- Phylogeny of pterosaurs
- ↑ Angustinaripterus (English) . Paleobiology Database Classic . (Retrieved May 19, 2016) .
- ↑ X. He, D. Yan, and C. Su. (1983). A new pterosaur from the Middle Jurassic of Dashanpu, Zigong, Sichuan. Journal of the Chengdu College of Geology 1 : 27–33.
- ↑ DM Unwin. (2003). On the phylogeny and evolutionary history of pterosaurs. In E. Buffetaut, J.-M. Mazin (eds.), Evolution and Palaeobiology of Pterosaurs, Geological Society of London, Special Publications 217 : 139-190.
- ↑ J. Lu, H. Pu, X. Wei, H. Chang, and M. Kundrat. (2015). A new rhamphorhynchid pterosaur (Pterosauria) from Jurassic deposits of Liaoning Province, China. Zootaxa 3911 (1): 119-129.