Evolutionary implications of dental anomalies in bats

Evolutionary implications of dental anomalies in bats
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蝙蝠牙齿异常的进化意义

DOI:
10.1111/evo.14211
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发表时间:
2021
期刊:
影响因子:
3.3
通讯作者:
Santana, Sharlene E.
Santana, Sharlene E.
中科院分区:
环境科学与生态学2区
文献类型:
--
作者:
Esquivel, Diego A.;Maestri, Renan;Santana, Sharlene E.

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解剖特征的获得或丧失是形态进化和生态适应的重要机制。牙齿异常(牙齿的缺失或增加)在哺乳动物中普遍存在,是颅齿专门化的潜在来源,但其宏观进化模式却很少被探索。我们提出了第一个系统发育的比较研究牙齿异常的第二大哺乳动物订单,翼手(蝙蝠)。我们进行了广泛的文献回顾,并调查了大量的博物馆标本,以分析蝙蝠牙齿异常的类型和患病率,并进行系统发育比较分析,以调查系统发育史和饮食专业化对牙齿异常发生率的作用。我们发现牙齿异常有一个显着的系统发育信号,这表明他们不是简单的特异质突变或随机发育障碍的结果,但可能有祖先的遗传起源或密切相关的物种之间共享的发育途径的结果。牙齿异常的发生率与饮食类别无关,表明颅齿专门化对蝙蝠牙齿异常没有影响。我们的研究结果深入了解蝙蝠牙齿异常的宏观进化模式,并为研究哺乳动物牙齿变异和多样性进化的新假设提供了基础。
The gain or loss of anatomical features is an important mechanism of morphological evolution and ecological adaptation. Dental anomalies—the loss or gain of teeth—are widespread and a potential source of craniodental specialization among mammals, yet their macroevolutionary patterns have been rarely explored. We present the first phylogenetic comparative study of dental anomalies across the second largest mammal Order, Chiroptera (bats). We conducted an extensive literature review and surveyed a large sample of museum specimens to analyze the types and prevalence of dental anomalies across bats, and performed phylogenetic comparative analyses to investigate the role of phylogenetic history and dietary specialization on incidence of dental anomalies. We found dental anomalies have a significant phylogenetic signal, suggesting they are not simply the result of idiosyncratic mutations or random developmental disorders, but may have ancestral genetic origins or result from shared developmental pathways among closely related species. The incidence of dental anomalies was not associated with diet categories, suggesting no effect of craniodental specialization on dental anomalies across bats. Our results give insight into the macroevolutionary patterns of dental anomalies in bats, and provide a foundation for investigating new hypotheses underlying the evolution of dental variation and diversity in mammals.
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