References / paperArachnid monophyly: Morphological, palaeontological and molecular support for a single terrestrialization within Chelicerata
Howard, R.J.; Puttick, M.N.; Edgecombe, G.D.; Lozano-Fernandez, J.
Year2020
Source roleprimary-study
DOI / ID10.1016/j.asd.2020.100997
Fitness and scope
topology · event-mechanism · geochronology
Primary 200-slow-gene analysis plus reanalyses and fossil/morphology synthesis; single terrestrialization is a topology-dependent historical inference.
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