[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]

Nocturnal dinosaurs in Science magazine

From: Ben Creisler

In the latest issue of Science magazine:

Lars Schmitz and Ryosuke Motani (2011)
Nocturnality in Dinosaurs Inferred from Scleral Ring and Orbit Morphology.
Science Express Index 
Science DOI: 10.1126/science.1200043 
Variation in daily activity patterns facilitates temporal partitioning of
habitat and resources among species. Knowledge of temporal niche
partitioning in paleobiological systems has been limited by the difficulty
of obtaining reliable information about activity patterns from fossils. On
the basis of an analysis of scleral ring and orbit morphology in 33
archosaurs, including dinosaurs and pterosaurs, we show that the eyes of
Mesozoic archosaurs were adapted to all major types of diel activity (that
is, nocturnal, diurnal, and cathemeral) and provide concrete evidence of
temporal niche partitioning in the Mesozoic. Similar to extant amniotes,
flyers were predominantly diurnal; terrestrial predators, at least
partially, nocturnal; and large herbivores, cathemeral. These similarities
suggest that ecology drives the evolution of diel activity patterns. 



myhosting.com - Premium Microsoft® Windows® and Linux web and application
hosting - http://link.myhosting.com/myhosting