[MARMAM] New publication - A new dolphin from the early Miocene of Patagonia, Argentina: Insights into the evolution of Platanistoidea in the Southern Hemisphere

Mariana Viglino viglinomariana at yahoo.com.ar
Mon Mar 26 05:55:43 PDT 2018

Dear all,
On behalf of all co-authors, I am pleased to inform you on the publication of an article describing a new species of platanistoid from the early Miocene of Patagonia (Argentina).

Viglino, M., M.R. Buono, C. Gutstein, M.A. Cozzuol & J.I. Cuitiño. 2018. A new dolphin from the early Miocene of Patagonia (Argentina): insights into the evolution of Platanistoidea in the Southern Hemisphere. DOI: 10.4202/app.00441.2017

AbstractThe contents of the superfamily Platanistoidea, an early-diverging lineage comprising extinct species and a single extant representative of South Asian river dolphin (Platanista gangetica), remain controversial. We describe here a partial skull and associated tympano-periotic bones identified as a new genus and species, Aondelphis talen gen. et sp. nov., collected in the lower levels of the Gaiman Formation (early Miocene), in Patagonia (Chubut Province, Argentina). Aondelphis is the first Patagonian platanistoid species named in almost a century. Phylogenetic analyses suggest Aondelphis talen gen. et sp. nov. and a taxon from New Zealand (cf. Papahu ZMT-73) are basal Platanistoidea sensu lato. Unambiguous synapomorphies related to the ear bones allowed us to determine its phylogenetic position. Aondelphis talen markedly differs from the other well-known early Miocene Patagonian platanistoid Notocetus, suggesting the coexistence of at least two different morphotypes that may have occupied different ecological niches at that time. The putative close relationship with a species from New Zealand indicates there was a rapid diversification and widespread distribution of the group in the Southern Hemisphere during the early Miocene. The description of new species and revision of historical records of Patagonian platanistoids can help shedding light on cetacean assemblages of the Patagonian sea during this epoch.

You can access the paper following this link: http://app.pan.pl/article/item/app004412017.html
Otherwise, feel free to contact me at viglino at cenpat-conicet.gob.ar
Lic. Mariana Viglino
Instituto Patagónico de Geología y Paleontología
Boulevard Brown 2915 - U9120ACD
Puerto Madryn - Chubut
Tel: (+54) 0280-4883184 - Int: 1347
Fax: (+54) 0280-4883543
viglinomariana at yahoo.com.ar
viglino at cenpat-conicet.gob.ar
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