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ISABERRYSAURA

a plant-eating neornithischian dinosaur from the Middle Jurassic of Argentina.
Pronunciation: ih-zah-BEH-ree-SOH-ruh
Meaning: Isabel Berry's lizardess
Author/s: Salgado, et al. (2017)
Synonyms: None known
First Discovery: Neuquén, Argentina
Chart Position: 761

Isaberrysaura mollensis

(Isabel Berry's lizardess from Los Molles)Etymology
Isaberrysaura is derived from "Isa Berry" (for Isabel Valdivia Berry, who reported the initial discovery) and the Greek "saura"—the feminine form of the masculine "sauros" (lizard). The species epithet, mollensis, means "from Molles" in Latin, referring to the Los Molles locality.
Discovery
The remains of Isaberrysaura were discovered in the Los Molles Formation, Neuquén Province, Argentina, by Isabel Valdivia and Erico Otilio Berry. The holotype (MOZ-Pv 6459) is a nearly complete skull—an estimated 52cm in length and 20cm across its widest point, and almost as high as it is wide—and an as-yet unprepared partial skeleton, which includes six neck (cervical) vertebrae, fifteen back (dorsal) vertebrae, a chunk of hip consisting of a sacrum with a partial ilium and an apparently complete pubis, nine tail (caudal) vertebrae, part of a shoulder blade (scapula), ribs, and some unidentifiable fragments.
Gut contents
Isaberrysaura preserved evidence of its last meal in the form of a mass of mineralised seeds in the middle-rear of its stomach cavity, which is a rare find for any dinosaur, and virtually unheard of outside of Ornithopoda. Identified as belonging to an extinct species of the Cycadales family of plants, the larger fossil seeds were in the early stages of digestion and had been gobbled down but not chewed, as they still preserved the entire sarcotesta—a toxic fleshy layer that would hold no fear for animals as large as dinosaurs; a notion based mainly on modern cycad seeds that are swallowed whole, toxins and all, but hold no fear for large mammals such as elephants. But beneath the sarcotesta, in both extinct and extant cycad seeds, is the sclerotesta—a hard undigestible layer which protects the endosperm on the perilous journey from the mouth, through the intestinal tract, and out the other end along with natural fertilizer, then they would sprout in their own sweet time, far away from where they were consumed. That is a 171-167 million year old example of reciprocal back-scratching, where critters—who had to feed, and plants—that needed to sow their seed, worked in perfect harmony. Unfortunately, the smaller seeds have yet to be identified.
Estimations
Timeline:
Era: Mesozoic
Epoch: Middle Jurassic
Stage: Bajocian
Age range: 171-167 mya
Stats:
Est. max. length: 6 meters
Est. max. hip height: 2 meters
Est. max. weight: ?
Diet: Herbivore
Family Tree:
Dinosauria
Ornithischia
Genasauria
Neornithischia
Isaberrysaura
mollensis
References
Salgado L, Canudo JI, Garrido AC, Moreno-Azanza M, Martínez LCA, Coria RA and Gasca JM (2017) "A new primitive Neornithischian dinosaur from the Jurassic of Patagonia with gut contents". Scientific Reports 7, Article 42778. [Image credit: Salgado (2017) Isaberrysaura with seed mass in red.]
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To cite this page:
Atkinson, L. "ISABERRYSAURA :: from DinoChecker's dinosaur archive".
›. Web access: 24th Mar 2017.
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