Revision of the spider genus Jacaena Thorell, 1897, with descriptions of four new species from Thailand (Araneae: Corinnidae) Author Dankittipakul, Pakawin Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai, Thailand; & Manukau Institute of Technology, Manukau, New Zealand; Author Tavano, Maria Museo Civico di Storia Naturale ‘ Giacomo Doria’, Genova, Italy Author Singtripop, Tippawan Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai, Thailand; text Journal of Natural History 2013 2013-04-29 47 23 - 24 1539 1567 http://dx.doi.org/10.1080/00222933.2012.763059 journal article 55811 10.1080/00222933.2012.763059 dfc793f4-7033-4586-9849-718e7e526360 1464-5262 556127 97EFA23C-7537-4156-8EF0-2D38CF889F5B Jacaena schwendingeri ( Deeleman-Reinhold, 2001 ) comb. nov. ( Figures 1A , 2A , 4A–C , 7A , 8F , 9A–C ) Sesieutes schwendingeri Deeleman-Reinhold, 2001: 461 , figs 771–774, description of ♂ ♀ . Figure 9. Jacaena spp. Distal part of male palp, ventral, showing conductor, tip of embolus and tegular apophysis (A, D). Ditto, retrolateral (B). Ditto, prolateral (C, E). Jacaena schwendingeri comb. nov. , holotype (A–C); J. lunulata sp. nov. , holotype (D, E). C, conductor. E, embolus. TA, tegular apophysis. Type material Holotype : ♂ , Thailand , Chiang Mai Province , Chiang Dao District , Doi Chiang Dao Wildlife Sanctuary , 510 m , pitfall trap , 22 September–25 October 1990 , P.J. Schwendinger leg. ( MHNG , examined, Figures 1A , 4A–C , 9A–C ). Paratype : From type locality, 450 m , 7 March 1987 , P.J. Schwendinger leg., 1♀ ( MHNG , examined, Figures 2A , 7A , 8F ). Diagnosis Males of J. schwendingeri comb. nov. can be recognised by the large and curved conductor that is divided into a heavily sclerotised outer margin and a semi-transparent inner membrane ( Figures 4A , 9A–C ); the apex of conductor is gradually tapered and abruptly bent anteriorly ( Figures 4C , 9B ). Females can be distinguished by the large copulatory orifices that are situated at the centre of the epigynal region ( Figure 7A ), and by the middle portion of the internal ducts, which are greatly enlarged, whereas the anterior part of the spermathecae is spherical ( Figure 8F ). Figure 10. Jacaena mihun , holotype (A–C); J. thakek comb. nov. , holotype (D–F). Male palp, ventral (A, D). Ditto, prolateral (B, E). Ditto, retrolateral (C, F). Distribution Known only from the type locality in northern Thailand . Other specimens from different localities previously known ( Deeleman-Reinhold 2001: 461 ) were misplaced (see J. lunulata sp. nov. for more details).