学術雑誌論文 A new tropical Oligocene dolphin from Montañita/Olón, Santa Elena, Ecuador

Tanaka, Yoshihiro  ,  Abella, Juan  ,  Aguirre-Fernández, Gabriel  ,  Gregori, Maria  ,  Fordyce, R. Ewan

12 ( 12 )  , p.e0188380 , 2017-12
ISSN:1932-6203
内容記述
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.
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https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/67958/1/Plos%20one12-12_e0188380.pdf

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