Anatomy ofHaplomastodon chimborazi(Mammalia, Proboscidea) from the late Pleistocene of Ecuador and its bearing on the phylogeny and systematics of South American gomphotheres

descriptionPublicationkeyboard_double_arrow_right Article 01 Dec 2010 Italy English Publisher:Museum National d'Histoire Naturelle, Paris, FranceJournal:Geodiversitas, volume 32, pages 663-721 (issn: 1280-9659, eissn: 1638-9395,

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Authors: Marco P. Ferretti;

doi: 10.5252/g2010n4a3

handle: 11581/476648

Anatomy ofHaplomastodon chimborazi(Mammalia, Proboscidea) from the late Pleistocene of Ecuador and its bearing on the phylogeny and systematics of South American gomphotheres

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Abstract

ABSTRACT I present here a revision of the late Pleistocene Haplomastodon chimborazi (Proano, 1922) material from Bolivar, Ecuador and a comparison with other New World trilophodont gomphotheres, and provide new morphological data in order to develop a novel phylogenetic hypothesis of South American (SA) proboscideans. Haplomastodon Hoffstetter, 1950 includes a single SA species whose valid name is H. chimborazi. Haplomastodon waringi (Holland, 1920) is considered to be an invalid taxon as it is based on undiagnosed material. Phylogenetic analysis supports the monophyly of SA gomphotheres (Cuvieroniinae) H. chimborazi, Cuvieronius hyodon (Fischer de Waldheim, 1814), and “Stegomastodon” platensis (Ameghino, 1888), based on five unambiguous characters. Conflicting evidence regarding the interrelationships of SA gomphotheres leads to three possible alternative hypotheses: two paired associations ((H. chimborazi, “S.” platensis) C. hyodon) and ((C. hyodon, “S.” platensis) H. chimborazi), and a trichotomy. Thes...

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Italy

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Keywords

Mammalia, Gomphotheriidae, Animalia, Biodiversity, Chordata, Taxonomy, Proboscidea

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