Time for early bilaterians
2007 (English)In: 51st Palaeontological Association Annual Meeting: Programme with Abstracts, 2007, 98- p.Conference paper (Other scientific)
The emergence of benthic bilaterian animals with mesoderm and frontal concentration of nervous and sensory systems triggered an unparalleled explosion of animal diversity. While several so-called metazoan-wide molecular phylogenetic dating studies have been published over the last few years to try address the timing of this event and its correlation with palaeoclimatological factors, none of these have included members of the worm groups Acoela and Nemertodermatida. These comparatively simple non-segmented worms have recently been shown to represent the oldest known extant bilaterian lineages, branching off before the split between protostomes and deuterostomes. Using ribosomal molecular data from many acoels, nemertodermatids and other metazoans together with age constraints derived from a wide collection of bilaterian and diploblast fossils, we here present age estimates of the deepest splits within Bilateria and compare results inferred from different dating methods and assumptions.
Place, publisher, year, edition, pages
2007. 98- p.
IdentifiersURN: urn:nbn:se:uu:diva-12598OAI: oai:DiVA.org:uu-12598DiVA: diva2:40367