Distribution of erythrocytic allozymes in two sibling species of greater galago [<i>Galago crassicaudatus</i> E. Geoffroy 1812 and <i>G. garnettii</i> (Ogilby 1838)]

Masters, Judith; Dunn, David S.

doi:10.1002/ajp.1350140304

Cited by 11 publications

(2 citation statements)

References 24 publications

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“…Galagonid species range in size between 60 and 1200 g (Charles-Dominique & Martin, 1972;Masters, 1985), forming a progression of body sizes linking tarsiers and the smallest indrid species. The frequency of leaping vs quadrupedalism in travel varies among galagonids (Charles-Dominique & Bearder, 1979;Crompton, 1984).…”

Section: Locomotory Variation Among Leapersmentioning

confidence: 99%

Postcranial adaptations for leaping in primates

2000

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Leaping primates are specialized for hindlimb-propelled locomotion within arboreal habitats. As a group, they include members of Galagonidae, Lemuriformes and Tarsiidae. Postcranial characters analysed here include humeral and femoral diaphyseal rigidity, articular surface areas and lengths. Data for leaper taxa are compared with corresponding data for less specialized small primates. The more generalized comparative primates include both closely related prosimians and distantly related platyrrhines (New World monkeys). In addition, the leapers are subdivided for further analysis according to body size and taxonomic association. Questions addressed concern the identi®cation of functionally and/ or phylogenetically linked traits in leaper postcrania. Results indicate that leapers as a group have relatively higher femoral diaphyseal rigidity and longer femora than do more generalized primates. These traits are also present in Pithecia pithecia, a platyrrhine leaper included for comparison. These enhanced properties probably function in resisting large hindlimb forces incurred during leaping, and in producing longer, more ef®cient leaps. Most of the large-bodied lemuriform leapers are further distinguished in having relatively bigger femoral heads and reduced humeral rigidity. The small-bodied leapers, galagonids and tarsiids, do not differ in either femoral head surface area or in any of the humeral properties from more generalized primates. Pithecia has a large femoral head like lemuriforms, but it is not reduced in humeral rigidity. Aspects of hip joint structure and mobility may be related to femoral head size in lemuriforms and Pithecia. Explanations regarding reduced lemuriform humeral rigidity are also explored. Differences between lemuriform primates are also present, most notably in aspects of the distal humerus. Indrids are characterized by relatively reduced trochleae, while many lemurids have relatively small capitula. These features are interpreted with regard to frequencies of suspensory behaviour and quadrupedalism.

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Section: Locomotory Variation Among Leapersmentioning

confidence: 99%

Postcranial adaptations for leaping in primates

2000

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“…Galagos are nocturnal animals, and their sexual recognition systems involve chiefly acoustic and olfactory signals, rather than visual or morphological ones [35][36][37]. Zimmermann and her co-workers [20,21,38] have studied the loud vocalizations used in specific-mate attraction and recognition among several lesser galago taxa, and have demonstrated convincingly that G. moholi, G. senegalensis and G. zanzibaricus show strong species specificity in their call structures.…”

Section: Testing the Predictions Of The Modelsmentioning

confidence: 99%

Speciation in the Lesser Galagos

Masters¹

1998

IJFP

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Species and their origins remain one of the outstanding enigmas of evolutionary biology. Many different views of the problem exist, but few have concrete predictions that open the problem to investigation. This study formalises predictions arising from the Recognition Concept of species (RC) and the Organization Theory of Speciation (OTS), and applies them to the pattern demonstrated by the lesser galago radiation. The RC and OTS are in agreement that one of the primary adaptive responses during animal speciation events involves the system of sexual recognition and reproduction, and indeed the lesser galago taxa show significant divergences in their communication systems relating to specific-mate recognition. On the other hand, only the RC predicts a concomitant adaptive response to the ecological conditions prevailing during speciation, and there are strong indications of shifts in habitat preference among these taxa. The predictions of the RC are supported above those of the OTS.

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Chromosome painting reveals that galagos have highly derived karyotypes†

Stanyon

Koehler

Consigliere

2002

American J Phys Anthropol

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The differences in chromosome number between Otolemur crassicaudatus (2n = 62) and Galago moholi (2n = 38) are dramatic. However, the total number of signals given by hybridizing human chromosome paints to galago metaphases is similar: 42 in O. crassicaudatus and 38 G. moholi. Many human chromosome homologs are found fragmented in each species, and numerous translocations have resulted in chromosomal syntenies or hybridization associations which differ from those found in humans. Only 7 human autosomes showed conserved synteny in O. crassicaudatus, and 9 in G. moholi. Both galago species have numerous associations or syntenies not found in humans: O. crassicaudatus has 11, and G. moholi has 21. The phylogenetic line leading to the last common ancestor of the two galago species accumulated 6 synapomorphic fissions and 5 synapomorphic fusions. Since the divergence of the two galago species, 10 Robertsonian translocations have further transformed the G. moholi karyotype, and 2 fissions have been incorporated into the O. crassicaudatus karyotype. Comparison with other primates, tree shrews, and other mammals shows that both galagos have karyotypes which are a mixture of derived and conserved chromosomes, and neither has a karyotype close to that of the proposed ancestor of all primates. Am J Phys Anthropol 117:319-326, 2002. Published 2002 Wiley-Liss, Inc.

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Distribution of erythrocytic allozymes in two sibling species of greater galago [Galago crassicaudatus E. Geoffroy 1812 and G. garnettii (Ogilby 1838)]

Cited by 11 publications

References 24 publications

Postcranial adaptations for leaping in primates

Postcranial adaptations for leaping in primates

Speciation in the Lesser Galagos

Chromosome painting reveals that galagos have highly derived karyotypes†

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