Paleontology

Reconstruction of a Thylacoleo carnifex attacking a Diprotodon (Image roman uchytel)

An article published in the journal “Paleobiology” describes a research on Thylacoleo carnifex. Commonly known as the marsupial lion, it was a predator native of Australia that lived between the Paleocene period and the beginning of the Pleistocene period, about 50,000 years ago. Christine Janis at the University of Bristol along with Figueirido Borja and Alberto Martín-Serra of the University of Malaga examined this animal’s elbows and concluded that it had a unique hunting style.

Reconstruction of Echovenator sandersi and its inner ear (Image courtesy A. Gennari 2016. All rights reserved)

An article published in the journal “Current Biology” describes a research on an ancient cetacean called Echovenator sandersi that shows how these marine mammals’ ultrasonic hearing is very ancient. A team of scientists led by Morgan Churchill of New York Institute of Technology in Old Westbury, New York, used modern scanning techniques to analyze the very well preserved ear of a fossil dating from the Oligocene period.

An article published in the journal “Palaeogeography, palaeoclimatology, Palaeoecology” describes a study that offers new evidence supporting the theory that the first animals caused the first major mass extinction that took place on Earth. According to a group of researchers led by Simon Darroch of Vanderbilt University, the animals species that emerged in the so-called Cambrian explosion altered their environment in such a way that they caused that extinction.

Reconstruction of Murusraptor barrosaensis. In white the bones found (Image Rodolfo A. Coria, Philip J. Currie)

An article published in the journal PLOS One describes the discovery of a new species of theropod dinosaur that was called Murusraptor barrosaensis dating back some 87 million years ago, in the Late Cretaceous. Two paleontologists identified it as a megaraptorid, a group of large carnivores whose classification is controversial. This new discovery could help to better understand the relations between different groups of theropods.

Reconstruction of Gualicho shinyae with the bones found in white (Image Sebastián Apesteguía at al.)

An article published in the journal PLOS ONE describes the discovery of a theropod dinosaur that was called Gualicho shinyae. It’s been classified in the group of carnosaurs and what makes it particularly interesting is that its arms are small like those of the more famous Tyrannosaurus rex, classified in another group of theropods. This suggests that this feature evolved a number of times independently.