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English: Scale chart of six spinosaurid species compared with a human (Ernst Stromer). References: Spinosaurus: Francisco Bruñén (2019) and Ibrahim et al. (2020) Oxalaia: Kellner et al. (2014) for Oxalaia's remains, most of anatomy based on Spinosaurus via Ibrahim et al. (2020) Suchomimus: Francisco Bruñén (2019) Baryonyx: Scott Hartman (2018)
Although reliable size and weight estimates for most known spinosaurids are hindered by the lack of good material, all known spinosaurids were large animals. [17] The smallest genus known from good material is Irritator , which was between 6 and 8 meters (20 and 26 feet) long and around 1 metric ton (1.1 short tons ; 0.98 long tons ) in weight.
Date/Time Thumbnail Dimensions User Comment; current: 15:50, 12 April 2018: 5,389 × 1,807 (238 KB): PaleoGeekSquared: Simpler, clearer style overall. 04:38, 11 April ...
Precocial mammal species generally have greater adult body weights than altricial mammals as precocial mammals have markedly longer gestation periods than altricial mammals. [35] The neonatal of larger mammals develop relatively more quickly and thus making it more likely that a large mammal would produce a more well-developed neonate as a ...
It did look a bit like a JP dinosaur with those feet, also straightened the tail on this one, both charts now have italics. >>: PaleoGeekSquared 00:30, 11 January 2018 (UTC) I would advise against a size chart for such a fragmentary taxon in the first place. Luso titan (Talk | Contributions) 01:30, 11 January 2018 (UTC)
You can think of it like your body's age versus your actual age. And while everyone ages at the same rate chronologically, their bodies and tissues may age at faster or slower rates.
Based on skeletal material from related spinosaurids, the skull of Oxalaia would have been an estimated 1.35 metres (4.4 feet) long; [5] this is smaller than Spinosaurus 's skull, which was approximated at 1.75 m (5 ft 9 in) long by Italian palaeontologist Cristiano Dal Sasso and colleagues in 2005. [20]
After being described as a specimen of Baryonyx in 2011, [3] it was realised to have been a unique species in 2019, with specimen ML1190 as the holotype. [4] Additional material was discovered in a June 2020 expedition, after which Iberospinus was described as a new genus and species in 2022 by Octávio Mateus and Darío Estraviz-López .