The Role of Developmental Integration and Historical Contingency in the Origin and Evolution of Cypriniform Trophic Novelties
The Role of Developmental Integration and Historical Contingency in the Origin and Evolution of Cypriniform Trophic Novelties
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DOI：
10.1093/icb/icz056
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发表时间：
2019-08-01
影响因子：
2.6
通讯作者：
Cohen, K. E.
中科院分区：
文献类型：
--
作者：
Hernandez, L. P.;Cohen, K. E.
虽然功能形态学家长期以来一直在研究解剖结构的进化，但形态学新奇事物的起源却很少受到关注。当这些新奇事物首次出现时，它们必须被纳入一个完整的系统才能发挥全部功能。因此，发育整合是形态新奇性起源的关键。然而，如果有足够的进化时间，这种整合可能会被打破，从而允许通过随后的结构解耦来促进劳动分工。鲤形目代表了一个不同的淡水鱼类群体，其特征在于几个营养新奇，包括：动筛介导的上颌前突，一个肌性腭和舌后器官，肥大的下咽颌咀嚼脑颅的基部，控制肥大的下咽颌运动的新咽肌组织，在少数物种中，还有一种极其复杂的鳃上器官，用于聚集过滤后的浮游植物。在这里，我们使用的财富，这样的营养新奇在不同的鲤科鱼类，目前的案例研究中，发展的整合允许起源的形态创新。正如在案例研究1和2营养创新可能与形态和谱系多样化。另外，案例研究3和4代表的情况下，生态位扩大，但没有随之而来的物种多样性增加。
Synopsis While functional morphologists have long studied the evolution of anatomical structures, the origin of morphological novelties has received less attention. When such novelties first originate they must become incorporated into an integrated system to be rendered fully functional. Thus, developmental integration is key at the origin of morphological novelties. However, given enough evolutionary time such integration may be broken, allowing for a division of labor that is facilitated by subsequent decoupling of structures. Cypriniformes represent a diverse group of freshwater fishes characterized by several trophic novelties that include: kinethmoid-mediated premaxillary protrusion, a muscular palatal and post-lingual organ, hypertrophied lower pharyngeal jaws that masticate against the base of the neurocranium, novel pharyngeal musculature controlling movement of the hypertrophied lower pharyngeal jaws, and in a few species an incredibly complex epibranchial organ used to aggregate filtered phytoplankton. Here, we use the wealth of such trophic novelties in different cypriniform fishes to present case studies in which developmental integration allowed for the origin of morphological innovations. As proposed in case studies 1 and 2 trophic innovations may be associated with both morphological and lineage diversification. Alternatively, case studies 3 and 4 represent a situation where ecological niche was expanded but with no concomitant increase in species diversity.