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    • Botelho, João Francisco; Smith Paredes, Daniel; Soto Acuña, Sergio; Núñez-León, Daniel; Palma, Verónica; Vargas, Alexander O. (John Wiley and Sons Inc., 2017)
      © 2016 Wiley Periodicals, Inc. In early theropod dinosaurs—the ancestors of birds—the hallux (digit 1) had an elevated position within the foot and had lost the proximal portion of its metatarsal. It no longer articulated ...
    • Faunes, Macarena; Botelho, João Francisco; Galleguillos, Patricio Ahumada; Mpodozis Marín, Jorge (Frontiers Research Foundation, 2015)
      © 2015 Faunes, Francisco Botelho, Ahumada Galleguillos and Mpodozis. Owen's pre-evolutionary definition of a homolog as "the same organ in different animals under every variety of form and function" and its redefinition ...