Koumpiodontosuchus

Koumpiodontosuchus is an extinct genus of neosuchian crocodyliform that lived in the Early Cretaceous. The only species is K. aprosdokiti.[1]

Koumpiodontosuchus
Temporal range: Barremian, 130–125 Ma
Koumpiodontosuchus aprosdokiti
Holotype skull
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Family: Bernissartiidae
Genus: Koumpiodontosuchus
Sweetman et al., 2015
Type species
Koumpiodontosuchus aprosdokiti
Sweetman et al., 2015

Discovery

Koumpiodontosuchus
Restoration

The first fossilised fragment of a skull was discovered by Diane Trevarthen on a beach near Sandown in the Isle of Wight in March 2011. Three months later, the second fragment of the skull was found by Austin and Finley Nathan. The two fragments were donated to Dinosaur Isle.[2] The species that the fragments belonged to was named Koumpiodontosuchus aprosdokiti, meaning "unexpected button-toothed crocodile".[3][4]

When the fragments were first seen by Steve Sweetman, a palaeontologist with the University of Portsmouth, he thought that they belonged to the Bernissartia fagesii species because of its small size and button-shaped teeth.[3] Sweetman published a paper on the discovery of the new species in Acta Palaeontologica Polonica.[5][6]

See also

References

  1. ^ Sweetman, S.; Pedreira-Segade, U.; Vidovic, S. (2014). "A new bernissartiid crocodyliform from the Lower Cretaceous Wessex Formation (Wealden Group, Barremian) of the Isle of Wight, southern England". Acta Palaeontologica Polonica. doi:10.4202/app.00038.2013.
  2. ^ "This crocodile roamed earth with dinosaurs!". Business Standard. 11 March 2014. Retrieved 11 March 2014.
  3. ^ a b "Skull fragments reveal new ancient crocodile species". BBC News. 11 March 2014. Retrieved 11 March 2014.
  4. ^ Osbourne, Hannah (11 March 2014). "Tiny Button-Toothed Crocodile Species From 126 Million Years Ago Discovered on Isle of Wight". International Business Times. Retrieved 11 March 2014.
  5. ^ "Tiny crocodile skull reveals new ancient species". University of Portsmouth. 11 March 2014. Retrieved 11 March 2014.
  6. ^ "A new species of tiny crocodile that lived 126 million years ago has been discovered, from fossils found on the Isle Of Wight". Capital FM. 11 March 2014. Retrieved 11 March 2014.

External links

Aegyptosuchidae

Aegyptosuchidae is an extinct family of eusuchian crocodyliforms from the Cretaceous period of Africa. They are characterized by their large size and flat heads. The family includes two genera, Aegyptosuchus and Aegisuchus.

Alligatorium

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Amphicotylus

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Atlantosuchus

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Bernissartia

Bernissartia ('of Bernissart') is an extinct genus of neosuchian crocodyliform that lived in the Early Cretaceous, around 130 million years ago.

At only 60 centimetres (2.0 ft) in length, Bernissartia is one of the smallest crocodyliforms that ever lived. It resembled modern species in many respects, and was probably semi-aquatic. It had long, pointed teeth at the front of the jaws that would have been of use in catching fish, but broad and flat teeth at the back of its jaws that were suited for crushing hard food, such as shellfish, and possibly bones.It is known primarily from skulls and skeletons found in modern-day Belgium and Spain. Less complete material has been referred to Bernissartia from the United Kingdom and North America.

Brillanceausuchus

Brillanceausuchus is an extinct genus of atoposaurid crocodylomorph. Fossils have been found in Early Cretaceous–age rocks of Cameroon. The genus is notable for the position of the secondary choana within its palate. Parts of the pterygoid bones make up the rostral margin of the choana and thus separate it from the palatines, a feature also seen in the more advanced neosuchian suborder Eusuchia. This characteristic was once thought to be characteristic of Eusuchia, but its presence in Brillanceausuchus suggests that the trait is homoplasic, thus making the evolution of the position of the choana within crocodilians more complex than previously thought.

Coelosuchus

Coelosuchus is an extinct genus of goniopholidid mesoeucrocodylian. Fossils have been found from the Graneros Shale of the Benton Group in Wyoming, and are of Cenomanian age. It was slightly over 1 meter in length.

Eusuchia

The Eusuchia ("true crocodiles") are a clade of crocodylomorphs that first appears in the Early Cretaceous with Hylaeochampsa. Along with Dyrosauridae and Sebecosuchia, they were the only crocodyliformes who survived the K-T extinction. Since the other two clades died out 35 and 11 million years ago, all living crocodilian species are eusuchians, as are many extinct forms.

Karatausuchus

Karatausuchus is an extinct genus of atoposaurid crocodylomorph. It is known from a single specimen discovered in the Late Jurassic (Oxfordian - Kimmeridgian) Karabastau Svita from the vicinity of Mikhailovka in the Karatau Mountains of southern Kazakhstan. The type specimen is PIN 25858/1, a complete but poorly preserved juvenile skeleton with some possible soft tissue preservation. It is notable for having over 90 teeth, but its other anatomical details are difficult to discern. The length of this individual is estimated at 160 millimetres (6.3 in). Karatausuchus was described in 1976 by Mikhail Efimov, and the type species is K. sharovi.

Khoratosuchus

Khoratosuchus is an extinct genus of neosuchian crocodylomorph which existed in northeast Thailand during the early Cretaceous period. Its type species is Khoratosuchus jintasakuli. Khoratosuchus is the youngest and most advanced Mesozoic crocodyliform yet known from Thailand. It possesses several distinctive features that help determine its phylogenetic position among crocodylomorphs, including secondary choanae relatively posterior and almost encircled by the pterygoid bones on the palate and a smooth dorsal surface of the skull.

Laganosuchus

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Nannosuchus

Nannosuchus (meaning "dwarf crocodile") is an extinct genus of goniopholidid mesoeucrocodylian from the Berriasian of England.

Neosuchia

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Sabresuchus

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Shamosuchus

Shamosuchus is an extinct genus of neosuchian crocodile that lived during the Late Cretaceous (Santonian-Campanian) period in what is now the Gobi desert of Mongolia, approximately 85 to 74 million years ago.

Siamosuchus

Siamosuchus is a genus of goniopholidid mesoeucrocodylian. Its fossils have been recovered from the pre-Aptian-age Lower Cretaceous Sao Khua Formation of eastern Thailand. It is known from a partial skull, most of the right half of the postcranial skeleton, and some bony scutes. Siamosuchus was described by Lauprasert and colleagues in 2007. The type species is S. phuphokensis. Siamosuchus may be closely related to the European genus Goniopholis.

Symptosuchus

Symptosuchus is an extinct genus of goniopholidid mesoeucrocodylian. It is known from the Late Cretaceous of Argentina. Argentine paleontologist Florentino Ameghino named the genus in 1899, along with the type species S. contortidens. It was formally described by Carlos Rusconi in 1934.

Wahasuchus

Wahasuchus is a genus of extinct mesoeucrocodylian of the Middle Campanian age found in the Quseir Formation, Egypt. The generic name derives from the Arabic word واحة (waha), which means "oasis", and souchos from the Greek in honor of crocodile-headed god of ancient Egypt. The specific egyptensis (Lat.) means from Egypt.Fossils of skull and jaw fragments, dorsal vertebrae, and fragmentary appendicular remains have been recovered.

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