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| - Afrovenator, war ein Carnosauria, der dem Allosaurus ähnelte, aber trotzdem zur Familie der Megalosauridae gehörte.
- Afrovenator ("African hunter") is an extinct genus of megalosaurid theropod dinosaur from the Early Cretaceous Period of northern Africa. It was a bipedal predator, with a mouthful of sharp teeth and three claws on each hand. Judging from the one skeleton known, this dinosaur was approximately 30 feet (9 meters) long from snout to tail tip.
- The remains of Afrovenator were discovered in the Tiourarén Formation of the department of Agadez in Niger. The Tiourarén was originally thought to represent the Hauterivian to Barremian stages of the early Cretaceous Period, or approximately 136 to 125 million years ago (Sereno et al. 1994). However, re-interpretation of the sediments showed that they are probably mid-Jurassic in age, dating Afrovenator to the Bathonian to Oxfordian stages, between 164 and 161 mya.The sauropod Jobaria, whose remains were first mentioned in the same paper which named Afrovenator, is also known from this formation.
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| abstract
| - Afrovenator, war ein Carnosauria, der dem Allosaurus ähnelte, aber trotzdem zur Familie der Megalosauridae gehörte.
- Afrovenator ("African hunter") is an extinct genus of megalosaurid theropod dinosaur from the Early Cretaceous Period of northern Africa. It was a bipedal predator, with a mouthful of sharp teeth and three claws on each hand. Judging from the one skeleton known, this dinosaur was approximately 30 feet (9 meters) long from snout to tail tip. The generic name comes from the Latin prefix afro- ("from Africa") venator ("hunter"). There is one named species, A. abakensis. The name refers to its predatory nature, and its location in Africa, specifically from In Abaka, the Tuareg name for the region of Niger where the fossils were found. The original description of both genus and species is found in a 1994 paper which appeared in the prestigious journal Science. The primary author was well-known American paleontologist Paul Sereno, with Jeffrey Wilson, Hans Larsson, Didier Dutheil, and Hans-Dieter Sues as coauthors. The remains of Afrovenator were discovered in the Tiourarén Formation of the department of Agadez in Niger. The Tiourarén most likely represents the Hauterivian to Barremian stages of the Early Cretaceous Period, or approximately 136 to 125 million years ago. The sauropod Jobaria, whose remains were first mentioned in the same paper which named Afrovenator, is also known from this formation. Afrovenator is known from a single nearly complete skeleton, featuring most of the skull (minus the mandible, or lower jaw), parts of the spinal column, hands, and forelimbs, a nearly complete pelvis, and complete hind limbs. This skeleton is housed at the University of Chicago.
- The remains of Afrovenator were discovered in the Tiourarén Formation of the department of Agadez in Niger. The Tiourarén was originally thought to represent the Hauterivian to Barremian stages of the early Cretaceous Period, or approximately 136 to 125 million years ago (Sereno et al. 1994). However, re-interpretation of the sediments showed that they are probably mid-Jurassic in age, dating Afrovenator to the Bathonian to Oxfordian stages, between 164 and 161 mya.The sauropod Jobaria, whose remains were first mentioned in the same paper which named Afrovenator, is also known from this formation. Afrovenator is known from a single nearly complete skeleton, featuring most of the skull (minus the mandible, or lower jaw), parts of the spinal column, hands, and forelimbs, a nearly complete pelvis, and complete hind limbs. This skeleton is housed at the University of Chicago. Most analyses place Afrovenator within Megalosauridae, which was formerly a "wastebasket family" which contained many large and hard-to-classify theropods, but has since been redefined in a meaningful way[1], as a sister taxon to the family Spinosauridae within the Megalosauroidea. A 2002 analysis, focused mainly on the noasaurids, found Afrovenator to be a basal megalosaurid. However, it did not include Dubreuillosaurus (formerly Poekilopleuron valesdunesis), which could affect the results in that region of the cladogram (Carrano et al. 2002). Other recent, more complete, cladistic analyses show Afrovenator in a subfamily of Megalosauridae with Eustreptospondylus and Dubreuillosaurus. This subfamily is either called Megalosaurinae (Allain 2002) or Eustreptospondylinae (Holtz et al. 2004). The latter study also includes Piatnitzkysaurus in this subfamily. A few alternative hypotheses have been presented for Afrovenator's relationships. In Sereno's original description, Afrovenator was found to be a basal spinosauroid (he uses the name "Torvosauroidea"), outside of Spinosauridae and Megalosauridae (which he calls "Torvosauridae") (Sereno et al. 1994). Finally, another recent study places Afrovenator outside of Megalosauroidea completely, and instead finds it more closely related to Allosaurus (Rauhut 2003). This is the only study to draw this conclusion.[2]
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