Starrett James, Jochim Emma E, Quayle Iris L, Zahnle Xavier J, Bond Jason E
University of California, Davis Davis California USA.
Ecol Evol. 2024 Mar 1;14(3):e10983. doi: 10.1002/ece3.10983. eCollection 2024 Mar.
The recognition and delineation of cryptic species remains a perplexing problem in systematics, evolution, and species delimitation. Once recognized as such, cryptic species complexes provide fertile ground for studying genetic divergence within the context of phenotypic and ecological divergence (or lack thereof). Herein we document the discovery of a new cryptic species of trapdoor spider, sp. nov. Using subgenomic data obtained via target enrichment, we document the phylogeography of the California endemic genus and its constituent species, which also includes and . Based on these data we show a pattern of strong geographic structuring among populations but cannot entirely discount recent gene flow among populations that are parapatric, particularly for deeply diverged lineages within . The genetic data, in addition to revealing a new undescribed species, also allude to a pattern of potential phenotypic differentiation where species likely come into close contact. Alternatively, phenotypic cohesion among genetically divergent lineages suggests that some level of gene flow is ongoing or occurred in the recent past. Despite considerable field collection efforts over many years, additional sampling in potential zones of contact for both species and lineages is needed to completely resolve the dynamics of divergence in at the population-species interface.
在系统学、进化和物种界定中，隐秘物种的识别和划分仍然是一个令人困惑的问题。一旦被确认为隐秘物种复合体，它们就为在表型和生态分化（或缺乏分化）的背景下研究遗传分化提供了丰富的素材。在此，我们记录了一种新的隐秘螲蟷蛛物种的发现，即[物种名称]新种。利用通过目标富集获得的亚基因组数据，我们记录了加利福尼亚特有属及其组成物种的系统地理学，其中还包括[其他物种名称]。基于这些数据，我们展示了种群间强烈的地理结构模式，但不能完全排除邻域分布种群间近期的基因流动，特别是对于[特定属内]深度分化的谱系。这些遗传数据除了揭示一个未描述的新物种外，还暗示了一种潜在的表型分化模式，即物种可能紧密接触。或者，遗传上有差异的[特定属]谱系之间的表型一致性表明，某种程度的基因流动正在进行或在最近发生过。尽管多年来进行了大量的野外采集工作，但仍需要在物种和谱系的潜在接触区域进行额外采样，以完全解决[特定属]在种群 - 物种界面的分化动态。
