Unique characters of the species itself, its suture between the praemaxilla and maxilla, and the fact the median ridge of the palate begins ( or ends ) at the ninth tooth pair.
22.
The head is moderate in size; two large prefrontal shields and a large frontal; beak not hooked; jaws feebly denticulated, the alveolar surface of the upper jaw with a strong median ridge.
23.
Like " W . fieldensis ", " Chuandianella ovata " had a bivalved carapace with a median ridge, a pair of caudal rami, a single pair of antennae, and stalked eyes.
24.
This type of helmet usually has 4 to 6 skull elements ( and the characteristic median ridge ), a nasal ( nose-guard ), a deep brow piece riveted inside the skull elements and large cheekpieces.
25.
In 2005 another study, by Oliver Rauhut, suggested that it was indeed a theropod, and more specifically, a member of the Abelisauroidea based on the presence of the distinct vertical median ridge on the astragalar groove.
26.
These features include delicate dermal bones with ornament consisting of continuous anastomosing ridges rather than tubercles, a dorsal trunk shield narrower than long and with a continuous and pronounced dorsal median ridge, and a pre-median plate that is wider than it is long .
27.
Museum curator John Foster describes them as having " thick median ridges on their lateral sides and denticles along their edges, " these features were similar to, but " more fully developed " than those in " Dryosaurus " . " Camptosaurus " teeth frequently exhibit extensive wear, which indicates that individuals in the genus had a diet of relatively tough vegetation.
28.
In this character, it resembles the Australian " C . nicolli ", which has the genital pore located further to the front . " C . johnstoni " does have a median ridge on the underside, another character of " Catatropis ", but unlike in all other species of the genus, this ridge is not smooth, but consists of a series of distinct but closely spaced papillae.
29.
""'Martinavis " "'is a genus of 2009, three additional species were named from the same location as " M . vincei " . " M . minor " is known from the holotype PVL 4046, a distally imperfect right humerus, " M . saltariensis " is known from the holotype PVL 4025, an incomplete left humerus, lacking the median ridge and " M . whetstonei " is known from the holotype PVL 4028, a distally imperfect left humerus.
30.
Septalium variably developed, generally short and V-shaped; septum low and massive, only supporting septalium at very posterior part and most part of it existing as a median ridge, running about 1 / 3 or more of dorsal valve length; hinge plates relatively thick and broad, almost horizontal or slightly inclined ventrally at anterior parts; inner socket ridges well developed, but not strong; crural bases narrow, well formed and given off dorsally from inner margins of hinge plates; crura thick, about 1 / 4 to 1 / 3 dorsal valve length, calcarifer, incurved ventrally at anterior parts.
