References / paperComprehensive species sampling and sophisticated algorithmic approaches refute the monophyly of Arachnida
Ballesteros, J.A. et al.
Year2022
Source roleprimary-study
DOI / ID10.1093/molbev/msac021
Fitness and scope
topology · event-mechanism
Primary dense taxon phylogenomic and total-evidence analysis recovering Xiphosura within a paraphyletic Arachnida; competing model results remain explicit.
Claim ledger
topology · contestedGenomic-scale chelicerate analyses using different taxon sets, slowly evolving genes, heterogeneous models and total evidence recover mutually incompatible monophyletic or paraphyletic Arachnida; one versus multiple terrestrializations and Cambrian–Ordovician timing are model-dependent historical reconstructions.
claim:event:arachnid-monophyly-conflict