Fossil seal discovered in South America


Figure 6, from Valenzuela-Toro et al. (2015) shows the relative size of Australophoca changorum (number 12 in the figure) to other assemblages of fossil and living pinnipeds, from other places (based on latitude) and geologic times

This picture shows the relative size of newly discovered fossil seal Australophoca changorum (number 12 in the figure) to other fossil and living pinnipeds (seal relatives), from other places (based on latitude) and geologic times.

From Pyenson Lab:

11/20/2015

by Ana Valenzuela-Toro

Australophoca, a new dwarf fossil seal from South America

Today, my South American colleagues and I announce the publication of a new species of fossil seal from the western coast of South America. The name of the new genus and species, Australophoca changorum, reflects its austral origin from Chile and Peru, and honors the Changos, a coastal tribe of indigenous people who lived in the Atacama (from northern Chile to southern Peru), and were short in stature. The description, published in Papers in Palaeontology, provides a scientific name for a dwarf species of true seal from the late Miocene Bahía Inglesa and Pisco formations of Chile and Peru, respectively. One of the paratype specimens that we identified was originally recovered from Cerro Ballena in the Atacama Region of Chile; the type specimen is USNM 438707.

This tiny fossil seal was smaller than a living harbor seal (Phoca vitulina), and ranks among the smallest true seals ever described, including both living and fossil ones. Interestingly, in the past ~11-3 million years, the western coast of South America seems to have been only occupied by true seals (or phocids), a fact that stands in stark difference to what we know about pinniped communities from other parts of the world, and other time[s] in the geologic record. This unusual feature of the pinniped community in western South America fits into a broader pattern of ecological turnover seen in the fossil record of marine consumers, including pinnipeds and seabirds, throughout the Southern Hemisphere, since the late Miocene.

4 thoughts on “Fossil seal discovered in South America

  1. Pingback: Chilean mine disaster bosses get away scot-free | Dear Kitty. Some blog

  2. Pingback: Jurassic semi-marine reptile discovery | Dear Kitty. Some blog

  3. Pingback: Human-sized fossil penguin discovery | Dear Kitty. Some blog

  4. Pingback: Megalodon and great white shark updates | Dear Kitty. Some blog

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.