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In most modern reptiles and amphibians, the quadratojugal is a prominent, straplike bone in the skull and provides structural integrity in the postorbital region of the skull. [6] In many reptiles, the inner face of the quadratojugal also connects to the quadrate bone which forms the cranium's contribution to the jaw joint.
The quadrate bone is a skull bone in most tetrapods, including amphibians, sauropsids (reptiles, birds), and early synapsids. In most tetrapods, the quadrate bone connects to the quadratojugal and squamosal bones in the skull, and forms upper part of the jaw joint.
The quadratojugal bosses on the cheek are broad and smooth with strong caudal curvature; The apex of the quadratojugal boss is rounded and unkeeled, and is situated caudally; The transverse nuchal crest on the rear skull roof is not visible in lateral, side, view; The occipital condyle is small, approximately 16% of basal skull length
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The human skull is the bone structure that forms the head in the human skeleton. It supports the structures of the face and forms a cavity for the brain. Like the skulls of other vertebrates, it protects the brain from injury. [6] The skull consists of three parts, of different embryological origin—the neurocranium, the sutures, and the ...
English: Reconstruction of USNM 5730, the "Felch Quarry Skull," which has been attributed to Brachiosaurus sp. Known material is shown in white, unknown material in gray. Unknown regions have been restored following the more complete skulls of Giraffatitan and Abydosaurus. Key: Bones an = angular; ar = articular; bo = basioccipital; d = dentary
A 13,600-year-old mastodon skull was uncovered in an Iowa creek, state officials announced this week. Iowa's Office of the State Archaeologist said in a social media post that archaeologists found ...
The jugal bone is located on either side of the skull in the circumorbital region. It is the origin of several masticatory muscles in the skull. [1] The jugal and lacrimal bones are the only two remaining from the ancestral circumorbital series: the prefrontal, postfrontal, postorbital, jugal, and lacrimal bones.