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Published February 18, 2026 | Version v1
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APPENDIX 2 in Body size histories of Shungura Formation reptiles in biotic and abiotic environmental context

Authors/Creators

  • 1. University of Cambridge Department of Zoology and University Museum of Zoology, Downing Pl, CB 2 3 EJ Cambridge (United Kingdom) and University of Helsinki Department of Computer Science, P. O. Box 68, FI- 00014 Helsinki (Finland) abigail. parker @ helsinki. fi (corresponding author)
  • 2. Centre Français des Études Éthiopiennes, CNRS, Ministère de l'Europe et des affaires étrangères, PO BOX 5554 Addis Ababa (Ethiopia) and Laboratoire Paléontologie Évolution Paléoécosystèmes Paléoprimatologie (PALEVOPRIM), CNRS, Université de Poitiers, 6 rue Michel Brunet, F- 86073 Poitiers (France) jean. renaud. boisserie @ univ-poitiers. fr
  • 3. Museum für Naturkunde, Leibniz-Institut für Evolutions- und Biodiversitätsforschung, Invalidenstrasse 43, 10115 Berlin (Germany) johannes. mueller @ mfn. berlin
  • 4. School of Earth, Environment, and Sustainability, University of Iowa, 123 North Capitol St., Iowa City, Iowa, 52242 IA 52242 (United States) chris-brochu @ uiowa. edu
  • 5. University of Cambridge Department of Zoology and University Museum of Zoology, Downing Pl, CB 2 3 EJ Cambridge (United Kingdom) jjh 71 @ cam. ac. uk

Description

APPENDIX 2. — Linear regression equations used to estimate skull length for crocodylian specimens;total body length for vertebral regressions from Iijima & Kubo (2020). * measurement for final two rows, vertebral centrum length, is in mm. Abbreviations: KNM, National Museums of Kenya; N, number of specimens; NHML, Natural History Museum (London); SL, skull length; TBI, Turkana Basin Insitute; TL, total body length.

TaxonMeasurement, x (cm*)Regression to SL (in cm) Regression and TL (in mm) trained on N =Sources for regression data
EuthecodonMandible lengthSL = 0.8754*x + 1.21134KNM-ER 757, KNM-KP 18330, KNM-ER 8260, KNM-LT 26306
Mandible length to posterior of dentary articulationSL = 0.8754*x + 1.21135NMK-ER 757, KNM-KP 18330, KNM-ER 8260, KNM-LT 26306, KNM-KP 66227
Average tooth spacing (excluding two anteriormost tooth sockets)SL = 19.966*x + 30.4464KNM-ER 757, KNM-LT 26306, KNM-ER 8260, KNM-ER 18330
cf. MecistopsNarrowest width of premaxilla Length of mandibular symphysisSL = 9.97*x SL = 3.8706*x1 1NME L 398 2508A NME L 398 2508A
CrocodylusMandible length Mandible length to posterior of dentary articulationSL = 0.6829*x +6.4381 SL = 0.8206*x + 4.579123 19NHML collections NHML collections
Length of mandibular symphysis Height of dentary at posterior end of mandibular symphysisSL = 3.1846*x + 17.789 SL = 13.158*x20 2NHML collections NME AL 126-11, L.449-4 (Hadar, Shungura Crocodylus)
Length between centers of d9-d12 alveoliSL = 5.1384*x + 8.31818NHML collections
Femur circumference D3-D10 vertebral centrum length C8-D2 vertebral centrum lengthSL = 4.8793*x + 1.2857 log(TL) = 1.906 + 0.993*log(x) log(TL) = 2.015 + 0.956*log(x)4 5 2NHML collections Iijima & Kubo 2020 Iijima & Kubo 2020

Notes

Published as part of Parker, Abigail K., Boisserie, Jean-Renaud, Müller, Johannes, Brochu, Christopher A. & Head, Jason J., 2026, Body size histories of Shungura Formation reptiles in biotic and abiotic environmental context, pp. 41 in Comptes Rendus Palevol 25 (2) on page 41, DOI: 10.5852/cr-palevol2026v25a2, http://zenodo.org/record/18760444

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Journal article: 10.5852/cr-palevol2026v25a2 (DOI)
Journal article: urn:lsid:plazi.org:pub:FFEDFFB2226E7373832A8E6EFF9BFFA2 (LSID)
Journal article: http://zenodo.org/record/18760444 (URL)
Journal article: http://publication.plazi.org/id/FFEDFFB2226E7373832A8E6EFF9BFFA2 (URL)
Journal article: http://zoobank.org/urn:lsid:zoobank.org:pub:C4B416C1-9383-4CA5-8A9F-3C317C6ED7A7 (URL)