埃希龍的化石在當時已知的泰坦巨龍類中算是保存較完整的,有大部分顱後骨骼。正模標本ISI R 335/1-65部位彼此相關、大致關節連接,是一副缺乏頭骨、大部分包覆於石膏內的骨骼,發現在23×8公尺的範圍內,由部分頸椎、背椎脊柱、薦骨、尾椎、肋骨、完整的骨盆、左肩胛骨、左鳥喙骨組成,橈骨、手部、後肢、腳骨皆遺失。[1]自首次發表後,相繼有更完整的個體化石發現。[4][5]
埃希龍是中等體型的蜥腳類,2016年葛瑞格利·保羅(英语:Gregory S. Paul)身長18公尺及體重15公噸。[7]2020年莫里納裴雷茲和拉臘曼迪給出身長11公尺、臀高3.9公尺、體重11.5噸的估計值。[8]埃希龍有著怪異的身體比例組合:長腿;前臂不成比例的加長;尾部結構典型;與體型相較而言,體腔非常的寬闊;一條短而粗壯的脖子,由形狀收縮的頸椎所構成,最短的僅22公分。[8]
^ 1.01.1Jain, Sohan L.; Bandyopadhyay, Saswati. New Titanosaurid (Dinosauria: Sauropoda) from the Late Cretaceous of Central India. Journal of Vertebrate Paleontology (Norman, Okla.: University of Oklahoma). 1997, 17 (1): 114. doi:10.1080/02724634.1997.10010958.
^ 8.08.1Molina-Pérez & Larramendi. Dinosaur Facts and Figures: The Sauropods and Other Sauropodomorphs. New Jersey: Princeton University Press. 2020: 255. Bibcode:2020dffs.book.....M.
^Curry Rogers, Kristina; Wilson, Jeffrey A. The Sauropods: evolution and paleobiology. Berkeley: University of California Press. 2005. ISBN 978-0-520-24623-2.
^Rubilar-Rogers, D.; Vargas, A. O.; González Riga, B.; Soto-Acuña, S.; Alarcón-Muñoz, J.; Iriarte-Díaz, J.; Arévalo, C.; Gutstein, C. S. Arackar licanantay gen. et sp. nov. a new lithostrotian (Dinosauria, Sauropoda) from the Upper Cretaceous of the Atacama Region, northern Chile. Cretaceous Research. 2021, 124: Article 104802. Bibcode:2021CrRes.12404802R. S2CID 233780252. doi:10.1016/j.cretres.2021.104802.
^Wilson, J. A. An Overview of Titanosaur Evolution and Phylogeny(PDF). Actas de las III Jornadas Internacionales Sobre Paleontología de Dinosaurios y Su Entorno, Salas de los Infantes, Burgos. 2006 [2 September 2018]. (原始内容存档(PDF)于2023-04-25).
^González Riga, Bernardo J. Nuevos restos fósiles de Mendozasaurus neguyelap (Sauropoda, Titanosauria) del Cretácico Tardío de Mendoza, Argentina. Ameghiniana. 2005, 42.
^Jeffrey A. Wilson, Paul C. Sereno, Suresh Srivastava, Devendra K. Bhatt. A New Abelisaurid (Dinosauria, Theropoda) Grom The Lameta(PDF). Contributions from the Museum of Paleontology (The University of Michigan). 2003-08-15, 31 (1): 1–42 [2 September 2018]. (原始内容存档(PDF)于2022-11-13).