The systematics of the North American cybaeid spiders (Araneae, Dictynoidea, Cybaeidae).

摘要

The Nearctic species of the Holarctic family Cybaeidae are revised with descriptions, range maps, and keys provided for seven genera (four new) and 79 species (42 new). The Holarctic genus Cybaeus has 33 new species (Cs. auburn, Cs. bilectus, Cs. bryoncavus, Cs. charlesi, Cs. chauliodus, Cs. coylei, Cs. echo, Cs. fraxineus, Cs. gidneyi, Cs. harrietae, Cs. hummeli, Cs. irreverens, Cs. lockei, Cs. orarius, Cs. pan, Cs. paralypropriapus, Cs. pearcei, Cs. penedentatus, Cs. piazzai, Cs. opulentus, Cs. rothi, Cs. sanbruno, Cs. schusteri, Cs. solanum, Cs. somesbar, Cs. thermydrinos, Cs. topanga, Cs. torosus, Cs. ubicki, Cs. viator, Cs. vulpinus, Cs. waynei, and Cs. wilsonia), ten new synonyms (Cs. adenoides = Cs. grizzlyi; Cs. chaudius and Cs. hatchi = Cs. shoshoneus; Cs. exlineae = Cs. bulbosus; Cs. hystrix = Cs. cribelloides; Cs. janus = Cs. eutypus; Cs. marinensis and Cs. angelus = Cs. consocius; and Cs. olympiae and Cs. tius = Cs. reticulatus), and four rejected old synonyms (Cs. grizzlyi and Cs. adenoides ;An autapomorphy of Cybaeidae has yet to be identified. The family is tentatively accepted as monophyletic. Secondary vulval pores (new to science) in Cybaeidae and other taxa are described and deemed to be a new autapomorphy of Dictynoidea. A vestigial major ampullate spigot on the anterior lateral spinnerets in Cybaeus supports a sister group relationship between Dictynoidea and Orbiculariae. A single row of tarsal trichobothria in cybaeids and other dictynoids indicates a sister group relationship between Amaurobioidea and Dictynoidea plus Orbiculariae. A cladogram of cybaeid relationships is presented. (Abstract shortened by UMI.)