Geometric morphometrics to interpret the endophytic egg-laying behavior of Odonata (Insecta) from the Eocene of Patagonia, Argentina
Geometric morphometrics to interpret the endophytic egg-laying behavior of Odonata (Insecta) from the Eocene of Patagonia, Argentina
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几何形态计量学解释阿根廷巴塔哥尼亚始新世蜻蜓目（昆虫纲）的内生产卵行为
DOI：
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发表时间：
2019
影响因子：
1.4
通讯作者：
J. Petrulevičius
中科院分区：
文献类型：
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作者：
Eugenia Romero;R. M. Gleiser;J. Petrulevičius
抽象的。虽然蜻蜓目有着丰富的化石记录，但关于其生殖生物学的许多问题仍然没有答案。有两种产卵策略，外植和内生的蜻蜓，后者是最具启示性的遗迹植物-昆虫协会的化石记录。我们评估了几何形态的傅立叶椭圆系列的基础上，允许表达的形状变化的痕迹蜻蜓卵内的桉树chubutensis（浆果）冈萨雷斯（部分），冈萨雷斯，2009年（桃金娘科）从拉古纳德尔Hunco（丘布特，阿根廷）（始新世早期），以及这种变化是否与这种材料的遗迹分类学是一致的。我们发现，最大的变化对应于压缩的形状，而其余两个组件反映的顶点的位置和它的曲率的变化，这改变了根据在叶中的痕迹的相对位置。没有证据表明叶子的硬度会影响鸡蛋痕迹的形状。我们假设这些痕迹可能是由一个单一的女性产生的：在最初的三维结构化石中观察到的模式变化与单个女性在接近叶子顶端时弯曲腹部插入鸡蛋的位置差异一致（在现存的蜻蜓中也观察到这种行为）。这是第一次用几何形态测量学分析内生卵的痕迹，这使我们能够对生活在大约5200万年前的雌性的产卵行为进行推断。
Abstract. Although the order Odonata has a rich fossil record, many questions about its reproductive biology remain unanswered. There are two strategies of egg laying among odonates, exophytic and endophytic, the latter being one of the most revealing vestiges of plant–insect association in the fossil record. We assessed whether geometric morphometrics based on elliptical series of Fourier allow expression of variability of shape in traces of Odonata eggs within a leaf of Eucalyptus chubutensis (Berry) González (in part), González, 2009 (Myrtaceae) from Laguna del Hunco (Chubut, Argentina) (early Eocene) and whether this variability is consistent with the ichnotaxonomy of this material. We found that the largest variation corresponds to the compression of the shape while the remaining two components reflect variations in the apex position and its curvature, which changed according to the relative position of the traces in the leaf. There was no evidence that the hardness of the leaf would affect the shape of the egg trace. We postulate that these traces could have been produced by one single female: Variations in the pattern observable in the fossil of an originally three-dimensional structure are consistent with differences in the position of the eggs inserted by a single female who has flexed her abdomen to insert the eggs as she approaches the apex of the leaf (behavior observed also in extant dragonflies). For the first time, endophytic egg traces are analyzed with geometrical morphometrics, and this allows us to make inferences on the oviposition behavior of a female that lived around 52 million years ago.
DOI：
10.1016/j.palaeo.2012.05.016
发表时间：
2012-08-01
影响因子：
3
作者：
Moisan, Philippe;Labandeira, Conrad C.;Kerp, Hans
通讯作者：
Kerp, Hans