Title: Karyotype evolution of spiders with holokinetic chromosomes (Dysderoidea)
Abstract: The superfamily Dysderoidea, a species-rich clade of haplogyne araneomorph spiders encompassing members that are all expected to exhibit holokinetic chromosome structure, is cytogenetically explored for this thesis. Holokinetic chromosomes lack primary constriction and centromere. In contrast to standard chromosomes, kinetochore covers most of chromosome surface of the holokinetic chromosomes. Holokinetic chromosomes arose multiple times from standard chromosomes during evolution of animals, plants, and protists. Due to specific structure, they are extremely tolerant towards chromosomal fusions and fissions. This has major implication on karyotype evolution of Dysderoidea and diverse diploid numbers are seen in the superfamily. Species inspected belong to families Dysderidae, Oonopidae, and Orsolobidae. This work represents a cross-section through these clades. Most of species included are karyotypically examined for the first time and karyotypes for others are revised. (Less)
Publication Year: 2017
Publication Date: 2017-01-01
Language: en
Type: article
Access and Citation
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot