TreeBASE Search-Analyses for study 269

@ARTICLE{TreeBASE2Ref16680, author = {Jeremy A. Miller and Frederick A. Coyle}, title = {Cladistic analysis of the Atypoides plus Antrodiaetus lineage of mygalomorph spiders (Araneae, Antrodiaetidae).}, year = {1996}, keywords = {}, doi = {}, url = {http://www.jstor.org/stable/3705934}, pmid = {}, journal = {Journal of Arachnology}, volume = {24}, number = {}, pages = {201--213}, abstract = {Cladistic analyses of the antrodiaetid spider genera Atypoides O.P-Cambridge 1883 and Antrodiaetus Ausserer 1871 yield a much more completely resolved phylogeny than that proposed by Coyle in 1971. Twenty-nine potentially informative characters were used in the analyses, which were performed using PAUP's a posteriori weighting options. Three independent analyses were performed, each with a ditferent outgroup. These outgroups were l) the antrodiaetid genus Aliatypus Smith 1908, the putative sister group of Atypoides plus Antrodiaetus 2) Aliatypus gulosus Coyle 1974, the most primitive Aliatypus species, and 3) a hypothetical ancestral taxon based on character states found in Aliatypus and the Atypidae, the latter being the putative sister group of the antrodiaetids. These three analyses produced a total of eight most parsimonious trees which support the following principal conclusions: l) Atypoides as defined by Coyle, is paraphyletic (Atypoides riversi 0. P.-Cambridge 1883 plus At. gertschi Coyle 1968 share with Antrodiaetus a common ancestor not shared with At. hadros Coyle 1968). 2) Antrodiaetus roretzi (L. Koch 1878) is a relict species which shares a unique common ancestor with all other Antrodiaetus species. 3) Coyle's unicolor group of nine Antrodiaetus species is paraphyletic; six of these form a recently-derived clade, (Antrodiaetus occultus Coyle 197l (An. yesoensis [Uyemura 1942], An. cerberus Coyle l971, (An. montanus [Chamberlin & Ivie 1933], (An. pugnax [Chamberlin 1917], An. hageni [Chamberlin 1917]), and the other three species, An. pacificu. (Simon 1884), An. robustus (Simon 1890), and An. unicolor (Hentz l841), are derived from more ancestral stock. 4) Coyle's lincolnianus group of three Antrodiaetus species, An. lincolnianus (Worley 1928), An. stygius Coyle 1971, and An. apachecus Coyle 1971, represents a valid clade. Our phylogeny suggests that two separate vicariance events led to the evolution of the two east Asian members of this otherwise North American assemblage. Vicariance events that are indicated by geological evidence and consistent with our phylogeny are postulated to account for the present distribution of North American species. New putative synapomorphies of Antrodiaetus and of Antrodiaetus plus Atypoides are proposed.} }