Cranial size and shape variation in Afrotropical Otomops (Mammalia: Chiroptera: Molossidae): testing species limits using a morphometric approach

被引:7
作者
Richards, Leigh R. [1 ,2 ]
Taylor, Peter J. [2 ,3 ]
Schoeman, M. Corrie [2 ]
Goodman, Steven M. [2 ,4 ,5 ]
Van Daele, Paul A. A. G. [6 ]
Lamb, Jennifer M. [2 ]
机构
[1] Durban Nat Sci Museum, ZA-4000 Durban, South Africa
[2] Univ KwaZulu Natal, Sch Life Sci, ZA-4001 Durban, South Africa
[3] Univ Venda, Sch Environm Sci, ZA-0950 Thohoyandou, South Africa
[4] Field Museum Nat Hist, Dept Zool, Chicago, IL 60605 USA
[5] Vahatra, Antananarivo 101, Madagascar
[6] Univ Ghent, B-9000 Ghent, Belgium
基金
新加坡国家研究基金会;
关键词
Africa; cranial morphology; ecogeographical variables; geometric morphometrics; giant mastiff bats; holotypes; morphological evolution; taxonomy; BODY-SIZE; PHYLOGENETIC-RELATIONSHIPS; MORPHOLOGICAL EVOLUTION; MARTIENSSENI CHIROPTERA; GEOMETRIC MORPHOMETRICS; FASTING ENDURANCE; LASIURUS CINEREUS; BATS; PHYLOGEOGRAPHY; MADAGASCAR;
D O I
10.1111/j.1095-8312.2012.01899.x
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
The taxonomy of the Old World bat genus Otomops (Chiroptera: Molossidae) has been the subject of considerable debate. The failure of classical morphological studies to provide consistent patterns regarding interspecific relationships within Otomops has limited any understanding of the evolutionary history of the genus. We used traditional and geometric morphometric approaches to establish the species limits of taxa from sub-Saharan Africa, the Arabian Peninsula, and Madagascar. Morphometric data supported the recent recognition of three distinct Afrotropical taxa: Otomops madagascariensis from Madagascar; Otomops martiensseni s.s. from southern, eastern, central, and western Africa; and an undescribed taxon from north-east Africa and the Arabian Peninsula. Analyses of craniodental measurements and landmark-based data showed significant cranial size and shape divergence between the three taxa. Cranial size and shape variation within Afro-Arabian Otomops were strongly influenced by altitude, seasonality of precipitation, and precipitation in the driest month. Based on morphometric patterns and molecular divergence estimates, we suggest that morphological evolution within Afro-Arabian Otomops occurred in response to the fluctuating climate during the Pleistocene on the one hand, and the increasing aridity and seasonality over north-eastern Africa on the other. (c) 2012 The Linnean Society of London, Biological Journal of the Linnean Society, 2012, , .
引用
收藏
页码:910 / 925
页数:16
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