An additional hole in the skull, the supratemporal fenestra, can be seen when viewed from above. The back of the skull is oriented at a slight upward angle, a feature that it shares with all other early synapsids.
The skull of Dimetrodon Limbatus is tall and compressed laterally, or side-to-side. The eye sockets are positioned high and far back in the skull. Behind each eye socket is a single hole called an infratemporal fenestra.
Single openings in the skull behind each eye, known as temporal fenestrae, and other skull features distinguish Dimetrodon and true mammals from most of the earliest sauropsids.
Male Merino Rams can be distinguished from females, or ewes, by their massive horns. When establishing territory and dominance, rams will battle with a series of ramming “head-butts.”
The Domestic Sheep has been a stable food source for human populations for nearly 7000 years. In addition to their meat, humans also make use of their milk and wool. Today, there are in excess of 1000 breeds of domestic sheep.
Dwarf elephants are prehistoric members of the order Proboscidea which, through the process of allopatric speciation on islands, evolved much smaller body sizes (around 3 ft. 3 in. to 7 ft. 7 in.) in comparison with their immediate ancestors.