Phylogenomics of paleoendemic lampshade spiders (Araneae, Hypochilidae, Hypochilus), with description of a new species from montane California

The spider genus Hypochilus is a relictual lineage of Nearctic species distributed disjunctly across the United States in three montane regions (California, southern Rocky Mountains, southern Appalachia). Phylogenetic resolution of species relationships in Hypochilus has been challenging, with different data types recovering sometimes conflicting topologies. Furthermore, conserved morphology coupled with extreme genetic divergence and paraphyletic topologies at the species level has led to uncertain species limits in some complexes. Using a combination of ultraconserved elements (UCEs), mitochondrial CO1 by-catch, and studies of morphology, we have reconstructed Hypochilus interspecies relationships and have more critically evaluated the possibility of cryptic species in California and in southern Appalachia. Phylogenomic data from hundreds of nuclear loci strongly support the monophyly of regional clades, and furthermore support a ((California, Appalachia), southern Rocky Mountains)) t...