Spider embryogenesis is affected by a range of environmental factors. Any sudden, drastic change in the environment may impair spider development, leading to various body deformities. In the present study, we analyze changes in the morphology and structure of the central nervous system of an Eratigena atrica larva, obtained in a teratological experiment in which embryos were exposed to alternating temperatures of 14 and 32 °C for the first 10 days. The studied larva had three pedipalps on the right side of the prosoma (polymely), two of which were fused along their entire length (total heterosymely). In addition, there was a short, club-shaped stump between the pedipalps. Histological analysis confirmed major changes in the structure of the subesophageal ganglion, i.e., the fusion of all three ganglia of pedipalps.

中文翻译：

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额叶前部复杂异常影响的Eratigena atrica的形态和中枢神经系统。

蜘蛛的胚胎发生受多种环境因素的影响。任何突然的，剧烈的环境变化都可能损害蜘蛛的发育，导致各种身体畸形。在本研究中，我们分析了毛ati鱼中枢神经系统的形态和结构的变化。幼虫，是在一次畸形实验中获得的，在该实验中，前10天将胚胎暴露于14和32°C的交替温度下。所研究的幼虫在假体的右侧（多头）有三个pedipalp，其中两个在整个长度上融合（总异端）。另外，在三足动物之间有一个短的，棍状的树桩。组织学分析证实食管下神经节的结构发生了重大变化，即三足节的所有神经节融合。