Class Note for ECOL 485 at UA
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This 2 page Class Notes was uploaded by an elite notetaker on Friday February 6, 2015. The Class Notes belongs to a course at University of Arizona taught by a professor in Fall. Since its upload, it has received 19 views.
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Date Created: 02/06/15
TUBULIDENTATA ORDER TUBULIDENTATA Family ORVCTEROPODIDAE Aardvark The common name aardvark Afrikaans for earthpig and the ordinal name Tubulidentata referring to tubule teethquot identify two of the most distinguishing features of these mammals Superficial features includeaslender head and snout large closable ears and muscular tail and limbs The digits are partially syndactylous The structure of the teeth is unique see below and Figs The permanent cheekteeth are evergrowing since they do not erupt at the same time they are seldom present simultaneously Weighing as much as 80 kg about 200 lbs aardvarks are the most massive termite eaters Aardvarks have a highly developed sense of smell The peculiar shape of the cranium Fig 64 is due to an enlargement of the anterior portion of the brain cavity and an elongation and expansion of the nasal cavities which house respectively the large olfactory lobes of the brain and the elongate curled turbinal bones which are covered by the ollactory mucosa The blunt end of the snout is soft and mobile and the nostrils are surrounded by dense hairs and sensory tentacle like vibrissae In habits aardvarks are primarily nocturnal and solitary and are most common in open grasslands and savannahs where termites and ants are abundant Aardvarks excavate their own elaborate burrows termite mounds and anthills Females generally bear one young Figure st Skull of an orycteropodid Olycleropusv x 13 142 One genus 1 species Africa south of the Sahara Recognition Characters I cheekteeth homodont columnar consisting of numerous vertical tubes of dentine in a matrix of pulp Figs 8 w 1 size mediumlarge 145220 cm piglike body covered with bristly hairs digits 45 with shovelshaped nails no incisors or canines cheekteeth as described above zygomatic arch complete Fig 64 jugal and lacrimal present no inter parietal pterygoid bones separate not form ing part of palate Fig 64 9 no extra zygapophyses on vertebrae 9923 002339 N9PPN 0quot Dental formula 20 Genus Orycteropus 1 O afer is the aardvarkr Remarks Reviews of the biology of aardvarks were provided by Kingdon 1971a and Melton 1976 Morphological features and anatomy were described by Sonntag 1925 Sonntag and Woollard 1925 and Clark and Sonntag 1926 143 TUBULIDENTATA
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