Data from: Phylogenomic resolution of scorpions reveals multilevel discordance with morphological phylogenetic signal

Scorpions represent an iconic lineage of arthropods, historically renowned
for their unique bauplan, ancient fossil record and venom potency. Yet,
higher level relationships of scorpions, based exclusively on morphology,
remain virtually untested, and no multilocus molecular phylogeny has been
deployed heretofore towards assessing the basal tree topology. We applied
a phylogenomic assessment to resolve scorpion phylogeny, for the first
time, to our knowledge, sampling extensive molecular sequence data from
all superfamilies and examining basal relationships with up to 5025 genes.
Analyses of supermatrices as well as species tree approaches converged
upon a robust basal topology of scorpions that is entirely at odds with
traditional systematics and controverts previous understanding of scorpion
evolutionary history. All analyses unanimously support a single origin of
katoikogenic development, a form of parental investment wherein embryos
are nurtured by direct connections to the parent's digestive system.
Based on the phylogeny obtained herein, we propose the following
systematic emendations: Caraboctonidae is transferred to Chactoidea new
superfamilial assignment; superfamily Bothriuroidea revalidated is
resurrected and Bothriuridae transferred therein; and Chaerilida and
Pseudochactida are synonymized with Buthida new parvordinal synonymies.