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TEINUROSAURUS

a troublesome averostran theropod dinosaur from the Late Jurassic of Portugal.
Pronunciation: tie-NOOR-o-SOR-us
Meaning: Stretched-tail lizard
Author/s: Nopcsa (1928)
Synonyms: See below
First Discovery: Portugal
Discovery Chart Position: #153

Teinurosaurus sauvagei

Despite being represented by just a single, elongate tail vertebra from the Jurassic of Portugal, the "Stretched tail lizard" has led an awfully eventful life after death. It was discovered loitering in the Musée Géologique du Boulonnais at Boulogne-sur-Mer in 1897 by French palaeontologist Henri-Émile Sauvage, who promptly assigned it to Iguanodon prestwichii, which had already been renamed Cumnoria prestwichi (with one less "i") by Seeley in 1888 and reassigned to Camptosaurus prestwichii by Lydekker the following year. Sauvage semi-caught-up in his very last scientific publication at the ripe old age of 72 in 1914, when he catalogued the Jurassic reptiles of Boulonnais in France and called this troublesome vertebra Cumnoria aff. prestwichi, presumably forgetting it was Portuguese! Then Franz Nopcsa identified it as the property of an ostrich-like theropod that he initially referred to as Teinourosaurus in 1924 and officially christened Teinurosaurus (with one less "o") in 1928.

The new name was almost lost when a footnote announcing this news was placed alongside a citation of Saurornithoides by a clumsy printer instead, and a correction in the following year's issue was completely missed by Friedrich von Huene, who (1) thought that Nopcsa had intended to rename Sauvage's vertebra Saurornithoides, (2) knew the latter name was preoccupied because Henry Osborn had already tied it to something else entirely in 1924, and (3) went ahead and renamed the same remains Caudocoelus sauvagei ("Sauvage's hollow tail") in 1932, to avoid any future confusion. Bless him.

The critter drifted off into obscurity, and there it stayed for thirty-odd years until a 1969 review by John Ostrom revealed the priority of Nopcsa’s name—and the inconvenient fact that the flamboyant baron had neglected to attach a species epithet, rendering it invalid. George Olshevsky stepped in with a taxonomic patch job in 1978, uniting Nopcsa's name with von Huene's epithet under the banner of Teinurosaurus sauvagei, but it hardly seems worth the bother since the fossil in question was apparently blown to kingdom come during bombing raids by the Third Reich. However, rumours abound that it survived two world wars and decades of neglect, and is still floating around the Boulogne Natural History Museum like a bad smell.
Etymology
Teinurosaurus is derived from the Greek "teino" (stretch), "oura" (tail) and "sauros" (lizard). The species epithet, sauvagei, honors French paleontologist Henri-Émile Sauvage.
Synonyms
Caudocelus (von Huene, 1932)
Cumnoria aff. prestwichi (Sauvage, 1897)
Teinourosaurus (Nopsca, 1924)
Estimations
Timeline:
Era: Mesozoic
Epoch: Late Jurassic
Stage: Kimmeridgian
Age range: 156-151 mya
Stats:
Est. max. length: ?
Est. max. hip height: ?
Est. max. weight: ?
Diet: Carnivore
References
• Hulke JW (1880) "Iguanodon prestwichii, a new species from the Kimmeridge Clay, distinguished from I. mantelli of the Wealden Formation in the S.E. of England and Isle of Wight by differences in the shape of the vertebral centra, by fewer than five sacral vertebrae, by the simpler character of its tooth-serrature, etc., founded on numerous fossil remains lately discovered at Cumnor, near Oxford". Quarterly Journal of the Geological Society of London, 36 (143): 433-456.
• Seeley HG (1888) "On Cumnoria, an iguanodont genus founded upon the Iguanodon prestwichi, Hulke". Report of the British Association for the Advancement of Science. 57: 698.
• Lydekker R (1889) "On the remains and affinities of five genera of Mesozoic reptiles". Quarterly Journal of the Geological Society. 45: 41-59.
• Sauvage HE (1897/1898) "Les Vertébrés fossiles du Portugal. Contributions à l'étude des poissons et des reptiles du Jurassique et du Cretacique".
Mémoires et Communications du Service géologique du Portugal, pp. 1-46.
• Sauvage HE (1914) "Catalogue des reptiles jurassiques du Boulonnais". Bulletin de la Société académique de Boulogne-sur-Mer, 10(1): 253-274.
• Nopcsa F (1928) "The genera of reptiles". Palaeobiol. 1: 163-188.
• Nopcsa F (1929) Addendum "The genera of reptiles". Palaeobiol. 1: 201.
• Huene F von (1932) "Die fossile Reptil-Ordnung Saurischia, ihre Entwicklung und Geschichte". Monographien zur Geologie und Palaeontologie, serie 1, 4(1-2): 1-361
• Ostrom JH (1969) "Osteology of Deinonychus antirrhopus, an unusual theropod from the Lower Cretaceous of Montana". Bulletin of the Peabody Museum of Natural History, Bulletin, 30: 148. ""Recognizing Sauvage's error in referring a theropod caudal centrum from the Jurassic of Portugal to Iguanodon prestwichii (Sauvage, 1897, p. 33 and PL VIII, figs. 7-10), Nopcsa intended to rename this as Teinurosaurus."
• Olshevsky G (1978) "The Archosaurian Taxa (excluding the Crocodylia)". Mesozoic Meanderings: 1-50.
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To cite this page:
Atkinson, L. "TEINUROSAURUS :: from DinoChecker's dinosaur archive".
›. Web access: 07th Mar 2026.
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