A range of leg anomalies was detected in embryos of the Tegenaria atrica spiders exposed to alternating temperatures of 14 and 32 °C. Multiple anomalies were observed in 13 individuals. This study is based on five individuals: two individuals affected by oligomely combined, respectively, with heterosymely and polymely, one affected by polymely with heterosymely, one by complicated polymely (accompanied by the reduction in length and malformations of the distal parts of the legs), and one individual with pure polymely. Changes in the central nervous system of these five individuals were described in detail on the basis of histological sections. The changes were mainly related to the number of neuromeres. Individuals affected by polymely had additional ganglia corresponding to the number of additional appendages, whereas the absence of a leg (oligomely) was associated with the absence of a ganglion. Histological analysis showed the fusion of ganglia in the three polymelic specimens, even though additional appendages were not fused.

中文翻译：

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与 Tegenaria atrica 腿部异常相关的形态学和解剖学变化

在暴露于 14°C 和 32°C 交替温度下的 Tegenaria atrica 蜘蛛的胚胎中检测到一系列腿部异常。在 13 个人中观察到多个异常。本研究基于五个个体：两个分别受寡聚体和多聚体影响的个体，一个受多聚体和异源体影响的个体，一个受到复杂的多聚体影响（伴有腿远端部分的长度减少和畸形） ，和一个纯聚合物的个体。在组织切片的基础上详细描述了这五个个体的中枢神经系统的变化。这些变化主要与神经节的数量有关。受 polymely 影响的个体有额外的神经节，对应于额外附属物的数量，而没有腿（寡聚）与没有神经节有关。组织学分析显示三个多聚体标本中的神经节融合，即使额外的附属物没有融合。