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I Know Dino Podcast Present Notes: Rajasaurus (Episode 115)


    Episode 115 is all about Rajasaurus, an abelisaurid theropod with an uncommon head crest.

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    On this episode, we focus on:

    • The dinosaur of the day: Rajasaurus
    • Identify means “princely lizard”
    • Abelisaurian theropod with an uncommon head crest
    • Discovered a partial skeleton (a part of the cranium, spine, hip bones, components of the hind legs, and tail)
    • Described in August 2003
    • Found by Suresh Srivastava of the Geological Survey of India between 1982-1984
    • Excavated within the Kheda district of Gujarat, India
    • In 1981 employees from a cement quarry confirmed geologists G.N. Dwivedi and D.M. Mohabey ball-like buildings they’d discovered, which have been dinosaur eggs (beneath the eggs have been fossils)
    • Between 1982-84, Suresh Srivastava collected fossil fragments and labored on cleansing the bones with U.B. Mathur and S.C. Pant (then nothing actually occurred for a couple of years), and created an in depth map
    • In 2001, Sereno and Wilson began to reconstruct these bones after which formally described Rajasaurus in 2003 (discovered the bones within the Geological Survey of India museum, and didn’t understand its significance at first)
    • Nevertheless, fossils described in 1923 may additionally belong to Rajasaurus. Charles Matley collected bones between 1917 and 1919, and at first (1921) he thought all of the bones he discovered have been from a single specimen of a brand new theropod (although the ilia and sacrum have been present in shut approximation). Then in 1923 Matley interpreted a few of these bones (ilia, sacrum, tibia, scutes) as a part of a brand new stegosaur, named Lametasaurus indicus. Nevertheless, no stegosaur bones present in India share derived characters with it, so in 1935 Chakravarti urged the ilia and sacrum (which are actually misplaced) have been a part of a theropod. It’s unclear if the scutes are a part of it (may be a part of titanosaurs discovered close by)
    • Kind species is Rajasaurus narmadensis
    • Species title means “from the Narmada Valley”
    • The Narmada River the place it was discovered has additionally yielded different dinosaur bones (some discovered within the late 1800s), together with Titanosaurus indicus
    • Rajasaurus has solely been present in India, which on the time it lived had just lately moved away from Gondwana and began transferring north
    • Rajasaurus is the primary theropod present in India with preserved cranial and postcraniel stays (a part of the cranium), which implies it will probably assist scientists be taught extra about how abelisaurs developed, since specimens described from India beforehand have been largely remoted bones
    • Rajasaurus is much like different abelisaurids, together with Majungasaurus from Madagascar, and Carnotaurus, from South America (had a typical ancestor)
    • In comparison with tyrannosaurs, which dominated northern continents and misplaced decorative buildings on their heads, abelisaurids like Rajasaurus, Majungasaurus, and Carnotaurus, had extra cranium ornamentation as they turned extra superior
    • Rajasaurus was discovered within the Lameta Formation, which have volcanic rocks (Deccan Traps), so Rajasaurus and different sauropods from there have been buried rapidly by Deccan volcanic flows
    • About 25-29.5 ft (7.6-9 m ) lengthy
    • Had a low rounded horn, which grew from its nasal bones (much like Majungasaurus)
    • Can see a life-size fiberglass mannequin of Rajasaurus on the Geological Survey of India’s Lucknow regional workplace
    • In Adlabs Imagica, India, there’s a Jurssic Trip Rajasaurus River Journey (much like the Jurassic Park trip at Common)
    • Can even see Rajasaurus within the sport Jurassic Park: Builder (purchase it in Event Mode)
    • Abelisauridae means “Abel’s lizards”
    • Clade of ceratosaurian theropods that lived within the Jurassic and Cretaceous in Gondwana (Africa, South America, India, and Madagascar)
    • Jose Bonaparte and Fernando Novas named Abelisauridae in 1985, after they described Abelisaurus (named after Roberto Abel, who found Abelisaurus)
    • Bipedal and carnivorous
    • Had brief hindlimbs and ornamentation on the cranium bones
    • Skulls have been typically tall and shallow
    • 4 digits on the hand
    • Abelsaurids are additionally a part of the group ceratosaurs (Limusaurus and Ceratosaurus had brief arms within the Jurassic, like abelisaurids)
    • Enjoyable reality: There are 13 states (and Washington D.C.) which have a state dinosaur and/or a dinosaur because the state fossil. The states with a state dinosaur or state fossil that’s a dinosaur are: Colorado, Connecticut, Maryland, Massachusetts, Missouri, Montana, New Jersey, New Mexico, Oklahoma, South Dakota, Texas, Utah, Wyoming.

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