Craniometric sexual dimorphism inLeontopithecus
Lesson, 1840 (Callitrichidae, Primates) |
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Authors: | Carlos Henrique de Freitas Burity Carlos Alberto Mandarim-de-Lacerda Alcides Pissinatti |
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Institution: | (1) Instituto de Biologia, Lab. de Morfometria (Prof. Mandarim-de-Lacerda), Universidade do Estado do Rio de Janeiro, Av. 28 de Setembro, 87 (fundos), 20551-030 Rio de Janeiro, RJ, Brazil;(2) Primatological Center of Rio de Janeiro (CPRJ-FEEMA), Rio de Janeiro, Brazil |
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Abstract: | Lion tamarins are among the World's most critically endangered primates. Many studies have been produced under guidance of
the International Management Committees for the preservation and management of these tamarins. Primates present morphological
sexual differences in a wide range of characteristics, including cranial morphology. Studies of sexual dimorphism in the cranial
morphology of theLeontopithecus are few in number and contradictory in their results. In order to check for the existence of sexual dimorphism in lion tamarins
the present study analyzed 17 craniometric distances on 56 crania of three species of lion tamarins (Leontopithecus): 20L. rosalia (14 females and 6 males); 13L. chrysomelas (6 females and 7 males); and 23L. chrysopygus (8 females and 15 males). All crania are housed in the CPRJ-FEEMA collection (Primatological Center of Rio de Janeiro) and
came from animals born in captivity.L. chrysopygus was more sexually dimorphic (10/17 measurements, 59%) thanL. chrysomelas (9/17 measurements, 53%) orL. rosalia (7/17 measurements, 41%). In all three species, male values are greater than the female ones, except for orbital breadth
(m7) inL. rosalia. However, this distance is not sexually dimorphic in this species. This study reveals that some cranial distances, especially
in the facial region, are sexually dimorphic in lion tamarins. |
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Keywords: | Leontopithecus Lion tamarins Cranium Mandible Sexual dimorphism |
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