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Episode 282: The brand new Navajo warrior raptor


    Episode 282 is all about Arcovenator, a relative of Majungasaurus present in France.

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    On this episode, we talk about:


    • The brand new dromaeosaurid Dineobellator was present in San Juan Basin, New Mexico supply
    • A UK household is creating dinosaur artwork from rocks on their each day walks at a neighborhood quarry supply
    • Colin Trevorrow, posted a behind the scenes picture of the Jurassic World: Dominion set supply

    The dinosaur of the day: Arcovenator

    • Abelisaurid theropod that lived within the Late Cretaceous in what’s now France
    • Abelisaurids had brief, tall skulls, very brief arms, and stout legs
    • Medium-sized. Initially estimated to be about 16-20 ft lengthy, then later revised to be 16 ft (4.8 m) lengthy
    • Although some scientists (Molina-Pérez and Larramendi) estimate it to be 23.6 ft (7.2 m) lengthy and weigh 2,094 lb (950 kg)
    • Practically full braincase discovered
    • Braincase related in dimension to Majungasaurus and Carnotaurus
    • Had some bone ornamentation on the cranium, however not as flashy as Majungasaurus
    • Had a bony forehead ridge
    • Cranium might have had house for a pineal gland (produces some hormones, like melatonin)
    • Arcovenator is a basal abelisaurid
    • Carnivorous, and possibly apex predator
    • Kind and solely species: Arcovenator escotae
    • Genus title means “arc hunter”
    • Genus title refers back to the river Arc, close to the place the fossils had been discovered
    • Species named in honor of the corporate Escota, which funded excavations since 2006
    • Fossils present in France in 2007 when a building firm known as Escota was engaged on extending the A8 motorway close to the town Aix-en-Provence discovered fossils in fluvial sandstones. Discovered elements of the cranium, caudal vertebra, elements of the decrease proper leg, in addition to cranial materials. Referred specimens include three tooth and two caudal vertebrae. Thierry Tortosa from the Museum of Pure Historical past, Aix-en-Provence and Eric Buffetaut, named and described the dinosaur
    • Named in 2013
    • Holotype is on the Museum of Pure Historical past, Aix-en-Provence
    • Arcovenator reveals that abelisaurids, as a substitute of carcharodontosaurids, had been the most important predators in Europe through the Campano-Maastrichtian (newest a part of the Cretaceous)
    • Lived on Ibero-Armorican island, which was fabricated from elements of what’s now France, Spain, and Portugal. Lived in a heat local weather with seasons, and fossils present in fluvial sandstone which was in all probability the mouth of a river
    • Different animals in the identical time and place included turtles, crocodylopmorphs, pterosaurs, sharks
    • Different dinosaurs in the identical time and place included titanosaurs, the ornithopod Rhabdodon, and nodosaurids
    • Phylogenetic evaluation confirmed Arcovenator is extra intently associated to abelisaurs present in India and Madagascar than South American abelisaurids. (Genusaurus, Tarascosaurus, and different Late Cretaceous discoveries had been recognized as basal abelisaurids)
    • Acrovenator discovery helps present that “Europe and Africa might have performed a significant position in abelisaurid dispersal, which apparently concerned crossing marine obstacles” (in response to the paper), which implies South America didn’t play as main a task
    • In response to Tortosa and others, there are three principal dispersal fashions to elucidate the distribution within the Cretaceous of Gondwanan non-marine vertebrates, which incorporates abelisaurids. The primary is the “Pan-Gondwana” mannequin, the place “a typical fauna was distributed on all of the Gondwanan landmasses through the Early Cretaceous, earlier than the severing of Africa from all the opposite southern continents throughout a comparatively temporary interval originally of the Late Cretaceous”
    • Subsequent is the “Africa first” mannequin, the place “Africa separated first from different Gondwanan landmasses, whereas terrestrial dispersal routes between South America, Antarctica, and Indo-Madagascar reminaed efficient till a gradual break-up through the Late Cretaceous”
    • The issue with the primary two fashions is it doesn’t consider animals from Europe, and abelisaurids, akin to Genusaurus, had been in Europe “earlier than the overall dislocation of Gondwana.” Additionally, there are many similarities between Arcovenator and kin and abelisaurids in Africa, Madagascar, and India, and the origin of abelisauroids was considered, on the newest, within the early Center Jurassic in Pangea
    • The third mannequin is the “Eurogondwana mannequin” which incorporates “Atlantogea”, the place Africa and Europe and Gondwana had biotic interchanges (fauna migrating), even after Gondwana broke up
    • Discovery of Arcovenator helps present the Atlantogean concept, and the interchanges between Europe, Madagascar, and India
    • Arcovenator is “the primary direct hyperlink between European kinds, the primitive African taxa and the derived Indo-Madagascan abelisaurids”

    Enjoyable Truth:
    Dinosaurs had been (and are) vulnerable to viruses.


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