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A diastema (pl.: diastemata, from Greek διάστημα, 'space') is a space or gap between two teeth. Many species of mammals have diastemata as a normal feature, most commonly between the incisors and molars. More colloquially, the condition may be referred to as gap teeth or tooth gap.
General patterns of dental morphological evolution throughout human evolution include a reduction in facial prognathism, the presence of a Y5 cusp pattern, the formation of a parabolic palate and the loss of the diastema. Human teeth are made of dentin and are covered by enamel in the areas that are exposed. [2]
Another distinguishing characteristic is the diastema, a toothless region spanning the width of three teeth at the front of the maxilla, where the bone noticeably thinned and could not have borne tooth sockets. Behind the diastema were two precanine teeth, two large canine teeth, and at least fourteen post-canine teeth (eleven being preserved ...
Australopithecines have thirty-two teeth, like modern humans. Their molars were parallel, like those of great apes, and they had a slight pre-canine gap (diastema). Their canines were smaller, like modern humans, and with the teeth less interlocked than in previous hominins.
Early species such as P. castrense have nearly absent postcanine diastemata. In later species, the postcanine diastema can vary from shortened such as in P. crassum and P. curtum to elongated like in P. medium and P. magnum. [8] The separation of cheek teeth from the incisors and canines attests to their independent and specific chewing ...
Camel skull showing the cheek teeth and the diastema. Cheek teeth or postcanines comprise the molar and premolar teeth in mammals. Cheek teeth are multicuspidate (having many folds or tubercles). Mammals have multicuspidate molars (three in placentals, four in marsupials, in each jaw quadrant) and premolars situated between canines and molars ...
The bothriodontines are a paraphyletic assemblage of anthracotheres that originated from Eurasia in the late middle Eocene ().The group can be distinguished from other anthracothere lineages by their upper molars having a mesostyle occupied by a transverse valley, selenodont cusps, a ventrally concave symphysis, elongated muzzles, and a diastema between the canine and first premolar tooth.
The long diastema between the canine and the postcanines, in both the upper and lower jaw, is unique to Abdalodon. The main cusp of Abdalodon's postcanines is straighter than those of other early cynodonts. Abdalodon's accessory cusps are proportionally larger when compared to the main cusp than in other early cynodonts.