Indosuchus

Indosuchus
Artistic representation of Indosuchus raptorius . The representation is purely hypothetical and based on better known, related genera.
Temporal occurrence
Upper Cretaceous ( Maastrichtian )
72 to 66 million years
Locations
India ( Lameta formation )
Systematics
Dinosaur (dinosauria) Lizard dinosaur (Saurischia) Theropoda Ceratosauria Abelisauridae Indosuchus
Scientific name
Indosuchus
Huene & Matley , 1933
Art
Indosuchus raptorius

Indosuchus ("Indian crocodile") is a little known genus of theropod dinosaur from the Upper Cretaceous ( Maastrichtian ) India . It was in 1933 by Friedrich von Huene and Charles Matley basis of two fragmentary cranium described that from the Lameta formation of Bara Simla originate a hill in Madhya Pradesh . These researchers attributed a third brain skull from the same site to a second new genus: Indosaurus . Indosuchus can bedistinguished from Indosaurus on the basis of the comparatively thin skullcap. Today all three skulls are lost.

Novas and colleagues noted in 2004 that all three skulls were in poor condition, so Indosaurus and Indosuchus may be synonyms (belonging to the same genus).

To date, two other finds have been assigned to the genus Indosuchus - these assignments are, however, doubted in the professional world. Chatterjee (1978) described a find of further skull remains from Bara Simla, which was discovered by Barnum Brown in 1922 . Among these remains is an upper jaw that was built as gracefully as the skullcap of Indosuchus , which is why Chatterjee ascribed the entire find to Indosuchus . However, Carrano and Sampson (2008) argue that there is no reason to assume that all of the remains of this find actually belonged to the same animal. Furthermore, Chatterjee and Rudra (1996) attributed a relatively complete skeleton to Indosuchus , which was discovered at Rahioli in Gujarat . However, Carrano and Sampson (2008) recognized that the elements of this skeleton belonged to different animals ( chimera ) and at least two theropods and one sauropod can be attributed.

Systematics

The only species in the genus is Indosuchus raptorius . Like Indosaurus, Indosuchus is a member of the Abelisauridae , a group of Ceratosauria . Von Huene and Matley (1933) originally assigned this genus to the Allosauridae ; later authors classified it as a representative of the Tyrannosauridae .

Individual evidence

1. ^ Gregory S. Paul : The Princeton Field Guide To Dinosaurs. Princeton University Press, Princeton NJ et al. 2010, ISBN 978-0-691-13720-9 , pp. 78–79, online ( memento of the original from July 13, 2015 in the Internet Archive ) Info: The archive link was inserted automatically and not yet checked. Please check the original and archive link according to the instructions and then remove this notice. . 
2. ^ ^{A b} Friedrich Baron von Huene , Charles Alfred Matley: The Cretaceous Saurischia and Ornithischia of the Central Provinces of India (= Geological Survey of India. Palaeontologia Indica. NS Bd. 21, No. 1, ISSN  0970-0528 ). Manager of Publication, Delhi 1933.
3. ↑ ^{a b c d} 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, here p. 202, doi : 10.1017 / S1477201907002246 .
4. ↑ Fernando E. Novas , Federico L. Agnolin, Saswati Bandyopadhyay: Cretaceous theropods from India: A review of specimens described by Huene and Matley (1933). In: Revista del Museo Argentino de Ciencias Naturales. NS Vol. 6, No. 1, 2004, ISSN  1514-5158 , pp. 67-103, digitized version (PDF; 78.62 kB) ( Memento of the original from October 7, 2012 in the Internet Archive ) Info: The archive link was automatically used and not yet tested. Please check the original and archive link according to the instructions and then remove this notice. . 
5. ↑ Ronald S. Tykoski, Timothy Rowe : Ceratosauria. In: David B. Weishampel , Peter Dodson , Halszka Osmólska (eds.): The Dinosauria . 2nd edition. University of California Press, Berkeley CA et al. 2004, ISBN 0-520-24209-2 , pp. 47-70.
6. ↑ Sankar Chatterjee : Indosuchus and Indosaurus, Cretaceous carnosaurs from India. In: Journal of Paleontology. Vol. 52, No. 3, 1978, ISSN  0022-3360 , pp. 570-580.
7. ↑ Sankar Chatterjee, Dhiraj K. Rudra: KT events in India: impact, rifting, volcanism and dinosaur extinction. In: Memoirs of the Queensland Museum. Vol. 39, No. 3, 1996, ISSN  0079-8835 , pp. 489-532, digitized .