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 mihun Deeleman-Reinhold, 2001 ( Figures 1D , 2G , 3D , 4G–I , 6F , 7D , 8A–D , 10A–C ) Jacaena mihun Deeleman-Reinhold, 2001: 467 , figs 786–795, description of ♂ ♀ . Type material Holotype : ♂ , Thailand : Nakhon Ratchasima Province : Khao Yai NP , 1000 m , secondary forest, sifting leaf litter , 25 October 1985 , P. Deeleman leg. ( RMNH , examined, Figures 4G–I , 10A–C ). Paratype : One ♀ , same data as holotype ( RMNH , examined) . Other material examined The following specimens were studied by Deeleman-Reinhold (2001) and included in the original description, but they were not designated as types : Thailand : Chiang Mai Province , Chiang Mai City , Mae Hia , deciduous forest and teak plantation, pitfall trap , 17–24 January 1988 , 1♂ ( MHNG , examined). From locality as previous, 7–13 February 1988 , 1♀ ( MHNG , examined). P.J. Schwendinger leg. New material Thailand : Sakon Nakhon Province : Phu Phan NP , 400 m , litter sample, 18 November 2007 , P. Dankittipakul leg., 1♀ ( TNHM ) . Loei Province : Phu Ruea NP , park headquarters, 850–8710 m , pan traps , 15–16 July 2007 , P. Dankittipakul leg., 1♂ ( TNHM ) . Khon Kaen Province : Phu Pha Man NP , in front of Tham (cave) Phiang Din , near the road Chumphae – Phu Kradung ( at km 122 ) c . 300 m , 24 July 2000 , sieving in a mixed deciduous forest, det. C. Deeleman , P.J. Schwendinger leg., 1♂ ( MHNG , TH –00/03) . Sugarcane plantation near Phu Pha Man NP , 300 m , 15 June 2007 , P. Dankittipakul leg., 1♂ ( TNHM ) . Chiang Mai Province , Chiang Mai City , Mae Hia , 7–24 January 1988 , det. C. Deeleman , P.J. Schwendinger leg., 1♂ ( MHNG , examined) . Diagnosis Males of J. mihun are very similar to those of J. thakek comb. nov. in having the strongly excavated apico-prolateral side of the tegulum ( Figures 4G cf. 5G), and the short conductor ( Figures 4H cf. 5H), but can be distinguished by the presence of a small triangular denticle on the dorsal surface of the conductor ( Figure 10A ). Females can be recognised by the tremendously lengthened insemination ducts strongly convoluted; spermathecae are indistinct ( Figure 8A–D ). Distribution Northern and north-eastern Thailand .