Stem-Bird Files: Rugops

Theropoda>Averostra>Neoceratosauria>Abelisauroidea>Abelisauridae>Rugops>R.primus
Sereno et al, 2004
Time: Cenomanian (97-93 million years ago)
Length: 3.5 meters (11.5ft) based on the only known specimen (a skull).
Height: Slightly above 1 meter (3.3ft) at the hip for the holotype specimen.
Weight: Around 150 kg (0.15 tonnes) for the holotype specimen.
Habitat: Echkar Formation, Niger, Africa.
Ecology and hunting habits: Small terrestrial predator. Like other abelisaurs, Rugops was probably a fast runner (although not as fast as some of it's relatives, like Carnotaurus) that targeted prey smaller than itself.
Diet: Juveniles of other dinosaurs, as well as pterosaurs and carrion, possibly including beached aquatic life, eggs, and other microvertebrate fauna like the tiny uruguaysuchid Araripesuchus.
Competition: The terrestrial(ish) notosuchian Kaprosuchus and juveniles of other theropod species such as Carcharodontosaurus, Spinosaurus and Bahariasaurus. Adult versions of these species were more often than not, likely predators of Rugops, being several orders of magnitude bigger than the small-prey specialist abelisaur. 
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Update 07/12/17: 
-Lineart completely remade.
-Replaced human scale figure.
-More accurate size estimate, now along the centra as is the norm, instead of in a straight line.
-Common name (uncreative, but some animals today have their scientific name as their common one too, and Rugops rolls off the tongue nicely).
- d o w n s i z e (based on more Ekrixinatosaurus-like instead of Carnotaurus-like proportions, but even with the latter it should still be 4.4 meters rather than 4.8 as before)
-Minor text corrections.