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Males tend to have larger teeth than females, [1] and tooth size also varies by race. [1] Abnormal tooth size is defined by some as when the dimensions are more than 2 standard deviations from the average. [1] Microdontia is when the teeth are abnormally small, and macrodontia is when the teeth are abnormally large.
Dentella minutissima, common name tiny teeth, [1] is a species of flowering plant in the family Rubiaceae and was first described in 1922 by Cyril Tenison White & William Douglas Francis, from a specimen collected near Winton. [3] [4] It is found growing on sand and grey clay on river banks and in creek beds. [1] "(Plants) often grow in ...
The oval leaves have tiny teeth with glands along the edges. Ceanothus velutinus grows up to 4 metres (13 feet) tall but generally remains under 3 metres, and forms colonies of individuals which tangle together to form nearly impenetrable thickets. [2] The aromatic evergreen leaves are alternately arranged, each up to 8 centimetres (3 inches) long.
Teeth affected by regional odontodysplasia nevAmelogenesis imperfecta is an autosomal dominant disease characterized by a defect in dental enamel formation. Teeth are often free of enamel, small, misshapen, and tinted brown. The cause of these deformities is due to a mutation in enamel in expression.
It was theorized that positive selection for shovel-shaped incisors over the spatulate incisors is more commonly found within cultures that used their teeth as tools due to a greater structural strength in increased shovel-shaped incisors. [2] In some instances, incisors can present a more pronounced version of this called double shovel-shaped.
An autapomorphy is a distinctive anatomical feature that is unique to a given organism. Several anatomical features found in Microraptor, such as a combination of unserrated and partially serrated teeth with constricted 'waists', and unusually long upper arm bones, are shared with both primitive avians and primitive troodontids.
The German specimen also shows a diastema (tooth gap) behind the first three teeth of the premaxilla. [5] As such a gap was not present in the French specimen, Peyer suggested that additional teeth were possibly present in this region the German specimen. [16] The number of digits on the hand of Compsognathus has been a source of debate. [29]
Gongylonema pulchrum was first named and presented with its own species by Molin in 1857. The first reported case was in 1850 by Dr. Joseph Leidy, when he identified a worm "obtained from the mouth of a child" from the Philadelphia Academy (however, an earlier case may have been treated in patient Elizabeth Livingstone in the seventeenth century [2]).
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