Odonata

Status: active

Current hypothesis:

Chromosome number evolution in Odonata is non-random with respect to sex chromosome system: XO lineages show higher rates of fission and fusion than XX/XY lineages, paralleling patterns in Coleoptera and consistent with the prediction that heteromorphic sex chromosomes constrain autosomal rearrangements via dosage compensation. Additionally, dragonflies (Anisoptera) and damselflies (Zygoptera) differ in baseline dysploidy rates reflecting differences in ancestral karyotype stability.

Next action:

Tealc to help Heath develop the draft — find the draft doc and continue writing