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Camelids are members of the biological family Camelidae, the only currently living family in the suborder Tylopoda. The seven extant members of this group are: dromedary camels , Bactrian camels , wild Bactrian camels , llamas , alpacas , vicuñas , and guanacos .
Poebrotherium lies within the clade Camelidae, which can be defined as (Stenomylinae + (Miolabinae + (Protolabinae + Camelinae))) + Poebrotherium. As such, Poebrotherium lies outside the Camelinae proper. In fact the definition of Camelidae is the most recent common ancestor of Poebrotherium and Camelus, and all of its descendants. [12]
The dromedary has 22 milk teeth, which are eventually replaced by 34 permanent teeth. The dental formula for permanent dentition is 1.1.3.3 3.1.2.3, and 1.1.3 3.1.2 for milk dentition. [42] In the juvenile, the lower first molars develop by 12 to 15 months and the permanent lower incisors appear at 4.5 to 6.5 years of age. All teeth are in use ...
Hemiauchenia [1] is a genus of laminoid camelids that evolved in North America in the Miocene period about 10 million years ago. This genus diversified and entered South America in the Late Pliocene about three to two million years ago, as part of the Great American Biotic Interchange.
The family Camelidae, which contains the living camels as well as lamines (the tribe Lamini, which includes the llama, guanaco, alpaca and vicuña), first emerged in North America during the Eocene, around 46-42 million years ago, reaching its apex of diversity during the Miocene epoch (23-5.3 million years ago).
The jaw and dental morphology of Palaeolama species distinguish them from other laminae. They tend to have a comparatively more dorsoventrally gracile mandible. [5] [10] Like Hemiauchenia, Palaeolama species lack second deciduous premolars and can further be differentiated by the distinct size and shape of their third deciduous premolars.
Unlike modern camelids, it had a pair of small incisor teeth in the upper jaw. The remaining teeth were large and adapted for eating tough vegetation. The shape of the toes suggests that it possessed foot pads, like modern camels, unlike earlier forms of camelid, which generally had hooves. This would have helped it walk over relatively soft ...
Tylopoda has only one extant family, Camelidae, which includes camels, llamas, guanacos, alpacas and vicuñas. This group was much more diverse in the past, containing a number of extinct families in addition to the ancestors of living camelids (see below).