Intra‐specific variation pattern is informative to understanding the evolution of morphological traits, but has been rarely studied in jumping spiders. Here we investigate the intra‐specific variation of non‐genitalic and genitalic traits in two euophryine jumping spider species that show considerable difference in sexual dimorphism: Chapoda recondita (Peckham & Peckham, 1896) and Antillattus cambridgei (Bryant, 1943). The results show the pre‐copulatory sexually selected traits (e.g. male chelicerae) tend to have positive intra‐specific allometry, and thus may have evolved under strong directional selection. The genitalic traits and some non‐genitalic traits tend to show negative allometries. Unlike non‐genitalic traits, the genitalic traits usually have high size‐corrected intra‐specific variation (CV’). Factors that may account for the negative allometry and high size‐corrected intra‐specific variation in genitalic traits are discussed. Pre‐ and post‐copulatory sexual selection may coexist in species and whether there is a trade‐off between these two selection mechanisms remains to be investigated.

中文翻译：

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两种真性跳跳蜘蛛物种的非生殖器和生殖器性状的种内变异

种内变异模式有助于了解形态特征的演变，但在跳跃蜘蛛中很少进行研究。在这里，我们调查了在两个具有显着性二态性差异的euophryine跳跃蜘蛛物种中非生殖器和生殖器性状的种内变异：Chapoda recondita（Peckham＆Peckham，1896）和Antillattus cambridgei（布莱恩特，1943年）。结果表明，交配前性选择的性状（例如雄性螯蟹）倾向于具有正的种内异向性，因此可能在强方向选择下进化了。生殖器性状和一些非生殖器性状倾向于表现出负异形。与非生殖器性状不同，生殖器性状通常具有较高的大小校正的种内变异（CV'）。讨论了可能导致负性异体症和生殖器性状的高位校正种内变异的因素。交配前和交配后的性选择可能共存于物种中，这两种选择机制之间是否存在取舍需要进一步研究。