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True horns are found mainly among: Ruminant artiodactyls. Antilocapridae ; Bovidae (cattle, goats, antelopes etc.). Giraffidae: Giraffids have a pair of skin covered bony bumps on their heads, called ossicones. Cervidae: Most deer have antlers, which are not true horns due to lacking a bone core and made of keratin.
The flat-tail horned lizard has flanges with fringed edges to conceal its shadow in the open desert. Diagram illustrates the camouflage principles involved. The flat-tail horned lizard has evolved elaborate camouflage measures to eliminate shadow. Their bodies are flattened, with the sides thinning to an edge; the animals habitually press their ...
The flat-tailed horned lizard occurs in areas of fine sand, while the short-horned lizard (P. douglasii) is found in shortgrass prairie all the way up into spruce-fir forest. The most common species in the Arizona Upland subdivision is the regal horned lizard ( P. solare ), which frequents rocky or gravelly habitats of arid to semiarid plains ...
Their common names refer directly to their horns or to their flattened, rounded bodies, and blunt snouts. The generic name Phrynosoma means "toad-bodied". In common with true toads ( amphibians of the family Bufonidae ), horned lizards tend to move sluggishly, often remain motionless, and rely on their remarkable camouflage to avoid detection ...
Lokiceratops had two curving horns more than 16 inches (40 cm) long above its eyes, small horns on its cheeks, and blades and spikes along its extended head shield. Dinosaur from Montana had horns ...
Meiolania was a well-armored animal with a somewhat raised carapace with spiky edges, osteoderm-covered frontlimbs, a head adorned by massive cow-like horns and a tail encased by spiked tail rings and tipped by a large bony club.
The horns, highly ringed, measure 25–43 cm (9.8–16.9 in) in males and 7–15 cm (2.8–5.9 in) in females. However, females have more fragile horns; some are even hornless. [ 7 ] [ 15 ] Grant's gazelle is very similar to Thomson's gazelle, but can be differentiated by its larger size and the white patch on the rump extending top over the tail.
The researchers compared the genomes of six species of apes, including humans, and 15 species of monkeys with tails to pinpoint key differences between the groups. Our ancient animal ancestors had ...