[MARMAM] New fossil rorqual from Peru

Felix Marx felix.marx at monash.edu
Wed Oct 5 23:20:38 PDT 2016

Dear colleagues,

please find below the abstract and link to our recently published, open
access paper on a new fossil species of rorqual from the Miocene of Peru:

Marx, F.G. and Kohno, N. 2016. A new Miocene baleen whale from the Peruvian
desert. Royal Society Open Science 3: 160542

Link: http://rsos.royalsocietypublishing.org/content/3/10/160542

Abstract: The Pisco-Ica and Sacaco basins of southern Peru are renowned for
their abundance of exceptionally preserved fossil cetaceans, several of
which retain traces of soft tissue and occasionally even stomach contents.
Previous work has mostly focused on odontocetes, with baleen whales
currently being restricted to just three described taxa. Here, we report a
new Late Miocene rorqual (family Balaenopteridae), *Incakujira
anillodefuego* gen. et sp. nov., based on two exceptionally preserved
specimens from the Pisco Formation exposed at Aguada de Lomas, Sacaco
Basin, southern Peru. *Incakujira* overall closely resembles modern
balaenopterids, but stands out for its unusually gracile ascending process
of the maxilla, as well as a markedly twisted postglenoid process of the
squamosal. The latter likely impeded lateral (omega) rotation of the
mandible, in stark contrast with the highly flexible craniomandibular joint
of extant lunge-feeding rorquals. Overall, *Incakujira *expands the still
meagre Miocene record of balaenopterids and reveals a previously
underappreciated degree of complexity in the evolution of their iconic
lunge-feeding strategy.

Kind regards,

Felix Marx


*Felix G. Marx* PhD
Marie Skłodowska-Curie Postdoctoral Fellow
*Royal Belgian Institute of Natural Sciences, Brussels, Belgium
*Monash University, Melbourne, Australia
*Museum Victoria, Melbourne, Australia

Address: School of Biological Sciences, Monash University
25 Rainforest Walk, VIC 3800, Australia
Tel. +61 (0)3 9905 1190 (Monash University) or +61 (0)3 8341 7733 (Museum
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