趋同与替代:南非福尔德角山脉变色龙的物种形成和Bradypodion Fitzinger三个新种的描述,1843

IF 0.8 4区 生物学 Q3 ZOOLOGY African Journal of Herpetology Pub Date : 2022-01-02 DOI:10.1080/21564574.2021.1998236
K. Tolley, C. Tilbury, M. Burger
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引用次数: 5

摘要

摘要:支持鳞片生态形态形成、形态趋同和生态形态(生态形态)进化的机制,使人们能够更好地了解变色龙的物种形成过程。特别是,来自南非福尔德角山脉的几个变色龙种群(Sauria、Chamaeleonidae、Bradypodion)引起了人们的注意。先前的研究表明,这些群体在基因上存在差异,但在表型上有很强的相似性。使用综合分类学方法,考虑到遗传多样性、栖息地和形态,其中三个种群被描述为物种。一个种群来自一个孤立的林地,在物种层面上有遗传差异,但在形态上与Knysna地区森林地区的Bradypodion damaranum(Boulenger,1887)相似。虽然不是姐妹物种,但这两个物种属于同一支,可能是由于森林的替代而分化的。另外两个种群来自邻近山脉的芬博斯栖息地(Tsitsikamma/Langkloof/Kouga山脉和Baviaanskloof山脉),在形态上也相似,但在物种层面上存在遗传差异。这两个物种不是姐妹分类群,也不在同一支中,但具有几乎相同的表型,这可能是芬博斯栖息地趋同进化的结果。在形态分类学的背景下,这些种群一直难以评估。然而,从生态物种形成、趋同和形态保守性的角度来看,物种边界是明显的,可以将它们描述为新的分类群。
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Convergence and vicariance: speciation of chameleons in the Cape Fold Mountains, South Africa, and the description of three new species of Bradypodion Fitzinger, 1843
ABSTRACT The mechanisms that underpin ecological speciation, morphological convergence and the evolution of ecological morphotypes (ecomorphs) in squamates have allowed for a better appreciation of the speciation process in chameleons. In particular, attention has been drawn to several populations of chameleons (Sauria, Chamaeleonidae, Bradypodion) from the Cape Fold Mountains, South Africa. Previous work suggested that these populations are genetically divergent, but with strong similarities in phenotype. Using an integrative taxonomic approach that accounts for genetic diversity, habitat and morphology, three of these populations are described as species. One population is from an isolated forest patch and is genetically different at the species level, but morphologically similar to Bradypodion damaranum (Boulenger, 1887) from forested areas in the Knysna region. Although not sister species, the two are in the same clade and probably diverged through vicariance of the forest. Two other populations are from fynbos habitat in adjacent mountain ranges (Tsitsikamma/Langkloof/Kouga mountains and Baviaanskloof Mountains) and are also morphologically similar, but genetically divergent at the species level. These two species are not sister taxa and are not in the same clade yet have a virtually identical phenotype presumably as the result of convergent evolution for the fynbos habitat. Within the context of morphological taxonomy, these populations have been difficult to evaluate. However, when viewed in the context of ecological speciation, convergence and morphological conservatism, the species boundaries are apparent, allowing for them to be described as new taxa.
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来源期刊
CiteScore
3.00
自引率
6.70%
发文量
15
审稿时长
>12 weeks
期刊介绍: African Journal of Herpetology (AJH) serves as an outlet for original research on the biology of African amphibians and reptiles. AJH is an interdisciplinary journal that publishes original articles and reviews from diverse fields and disciplines, such as conservation, phylogenetics, evolution, systematics, performance, physiology, ecology, behavioural ecology, ethology, and morphology. The Journal publishes two issues a year. There are no page charges .
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