本論文主要以粒線體基因對褸網蜘蛛作分子親緣關係的鑑定，首先單獨使用 12S、16S 核醣體部份 DNA 序列，或 12S 及 16S rDNA 序列合併的序列資料，分別使用 Maximum-Parsimony、Neighbor-Joining 及 Maximum-Likelihood 方法建構親緣關係樹型圖，比較所有親緣關係樹型圖的異同，並且與形態資料分析所獲得親緣關樹型圖結果互相輔證。分析合併 12S 及 16S rDNA 資料，由三種分析所得到強烈支持的親緣關係樹型圖顯示，褸網蜘蛛科應歸類於狼蜘總科內，與篩疣類的渦蜘科親緣關係較遠。分析 12S rDNA 序列的二級結構結果，圖型上一共有七個保守的位置，均發生在鍵結 (stem) 的位置上，顯示鍵結的鹽基對褸網蜘蛛的演化過程中有強的約束力。
本文另一方面以隨機放大 DNA (Random amplified polymorphic DNA, RAPD) 的方法，分析台灣褸網蜘蛛族群的遺傳結構，透過相似度表的建立及 UPGMA 關係樹型圖，瞭解褸網蜘蛛族群間的遺傳結構，推測地理阻隔是否與褸網蜘蛛族群遺傳結構可能的關聯性。褸網蜘蛛有定點結網補食習性，以及幼蟲沒有牽游絲空飄的能力，所以移動能力很薄弱，由 RAPD 分析 DNA 條紋相似性及 UPGMA 樹型圖來看，均顯示台灣褸網蜘蛛族群已可分為北、中、南三個主要的族群，台灣褸網蜘蛛族群遺傳結構已有差異。利用 AMOVA 分析的結果，仍然不能夠顯示出褸網蜘蛛遺傳結構變化，是來自於個體間的差異或者是地理的阻隔所造成的，未來仍應以更多的採集樣本作進一步的研究。

In this work, the genetic variations of two cribellate spider families, Psechridae (psechride spiders) and Uloboridae, plus ecribellate spider families within Araneomorphae were examined by analyzing their partial mitochondrial 12S and 16S rDNA sequences and their phylogeny placement tested. Using Hexathelidae (Macrothele holsti) as outgroup taxa, the molecular phylogenetic relationships of Lycosoidae superfamily spiders was resolved. The results indicated that cribellate spiders are polyphyletic. The hierarchical structure analysis clearly demonstrates that the cribellate spider, Psechridae, be included within Lycosoidae clade that comprises of Lycosidae, Pisauridae and Oxyopidae. The analysis also reaffirmed that cribellate Psechridae and Uloboridae are two distant lineages. However, the topology within the Lycosoidae clade from our analysis differs from that as inferred by morphological, ecological and behavioral characterizations.
RAPD analyses were performed on five different populations of Taiwanese psechride spiders to determine their genetic parameters. An overall six primers used to calculate nucleotide similarities and an UPGMA tree was constructed based on the data analyzed. The results showed that the populations of psechride spiders in Taiwan be grouped into several clusters that have a high level of genetic heterogeneity. Samples collected from northern and southern Taiwan can be paired with those from central sector of the island that indicates genetic variation among the populations studied as a consequence of geological separation. Base on AMOVA model, it remains unclear whether the difference in genetic variation is due to each individual or geographic vicariance. More detailed investigation is needed before a better and clear picture on the genetic structure of psechride spiders in Taiwan is understood.

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