New species of Boreohesperus (Diplopoda, Polydesmida, Paradoxosomatidae) from north-western Australia Author Car, Catherine A. 8C425D2C-EF55-4DCC-A3E6-E4901E6A4A99 Department of Terrestrial Zoology, Western Australian Museum, Locked Bag 49, Welshpool DC, Western Australia 6986, Australia. & urn: lsid: zoobank. org: author: 8 C 425 D 2 C-EF 55 - 4 DCC-A 3 E 6 - E 4901 E 6 A 4 A 99 & Corresponding author: catherine. car @ museum. wa. gov. au catherine.car@museum.wa.gov.au Author Harvey, Mark S. FF5EBAF3-86E8-4B99-BE2E-A61E44AAEC2C Department of Terrestrial Zoology, Western Australian Museum, Locked Bag 49, Welshpool DC, Western Australia 6986, Australia. & Email: mark. harvey @ museum. wa. gov. au & urn: lsid: zoobank. org: author: FF 5 EBAF 3 - 86 E 8 - 4 B 99 - BE 2 E-A 61 E 44 AAEC 2 C & Research Associate, Division of Invertebrate Zoology, American Museum of Natural History, Central Park West at 79 th Street New York, NY 10024, USA. & Research Associate, Department of Entomology, California Academy of Sciences, 55 Music Concourse Drive, San Francisco, CA 94118 USA. & Adjunct, School of Animal Biology, University of Western Australia, 35 Stirling Highway, Crawley, Western Australia 6009, Australia. mark.harvey@museum.wa.gov.au text European Journal of Taxonomy 2017 2017-05-22 320 1 11 journal article 22103 10.5852/ejt.2017.320 1e7a2fce-52af-414e-8ca0-398b338fe188 2118-9773 3829268 Genus Boreohesperus Shear, 1992 Fig. 1 Boreohesperus Shear, 1992: 778 . Type species Boreohesperus capensis Shear, 1992 , by original designation. Diagnosis Boreohesperus may be distinguished from the four other genera of Australian paradoxosomatids whose gonopods divide into two main branches, Dicladosoma Brölemann, 1913 , Dicladosomella Jeekel, 1982 , Oncocladosoma Jeekel, 1985 and Somethus Chamberlin, 1920 , by the two main branches of its gonopod arising from a distinct femorite that may vary from one-quarter to one-half of the acropodite length. In contrast, in Dicladosoma , the two thick gonopod branches arise from the prefemur, and the gonopods of each of the other three genera are split into two main branches much more deeply than in Boreohesperus , almost to the base of the acropodite. Description The type species description remains unchanged from that set out in the first paper on Boreohesperus by Car & Harvey (2013) . Taxonomic notes The new species are considerably larger than those previously described, except B. capensis , ranging in length from approximately 16–20 mm . They, like B. capensis , also lack paranota. The gonopods of the three new species are also relatively larger (> 1 mm in length) and much more robust than the delicate structures of the other species, five of which have gonopods less than 1 mm in length. In all three new species, the gonopod femorite is relatively longer (approximately one-half the acropodite length), stockier and extremely broad when compared with those of the southern species, particularly that of the type species. It seems that the new Koolan Island species ( B. vascellus sp. nov. ) represents one extreme of femorite stoutness while B. capensis has the most slender femorite of all ( Fig. 1 ). Finally, with the exception of B. capensis , each of the described southern species has a marked bifurcation of the solenomere tip: two of the new species carry a small process at the solenomere tip; in the third, a process is entirely lacking.