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A new tropical Oligocene dolphin from Montanita/Olon, Santa Elena, Ecuador.

ABSTRACT: A new small probable Oligocene dolphin from Ecuador represents a new genus and species, Urkudelphis chawpipacha. The new taxon is known from a single juvenile skull and earbones; it differs from other archaic dolphins in features including widely exposed frontals at the vertex, a dorsally wide open vomer at the mesorostral groove, and a strongly projected and pointed lateral tuberosity of the periotic. Phylogenetic analysis places it toward the base of the largely-extinct clade Platanistoidea. The fossil is one of a few records of tropical fossil dolphins.

SUBMITTER: Tanaka Y 

PROVIDER: S-EPMC5737981 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature

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A new tropical Oligocene dolphin from Montañita/Olón, Santa Elena, Ecuador.

Tanaka Yoshihiro Y   Abella Juan J   Aguirre-Fernández Gabriel G   Gregori Maria M   Fordyce R Ewan RE  

PloS one 20171220 12

A new small probable Oligocene dolphin from Ecuador represents a new genus and species, Urkudelphis chawpipacha. The new taxon is known from a single juvenile skull and earbones; it differs from other archaic dolphins in features including widely exposed frontals at the vertex, a dorsally wide open vomer at the mesorostral groove, and a strongly projected and pointed lateral tuberosity of the periotic. Phylogenetic analysis places it toward the base of the largely-extinct clade Platanistoidea. T  ...[more]

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