Unexpected occurrence of the genus Eratigena in Laos with description of a new species (Araneae: Agelenidae) Author Bolzern, Angelo Author Jäger, Peter text Zootaxa 2015 3920 3 431 442 journal article 10.11646/zootaxa.3920.3.2 f491c6f8-0266-4c7e-8819-1e5c32c34f2e 1175-5326 238674 99ABD0BA-173B-418F-A87F-647867BD68A1 Eratigena Bolzern, Burckhardt & Hänggi, 2013 Eratigena Bolzern et al. 2013 : 738 . Type species: Eratigena atrica (C. L. Koch, 1843) , original designation. Remarks. In this recently designated genus, 18 species have been placed so far (Word Spider Catalog 2014), 16 of which are mainly limited to Italy , France , and the Iberian Peninsula. Only two species, Eratigena agrestis (Walckenaer, 1802) and E. atrica , also occur in Central Europe and may have been introduced to the UK and North America ( Bolzern et al. 2013 ). FIGURES 1–4. Eratigena laksao sp. n. , male paratype habitus of living specimen (1 lateral view; 2 anterior view; 3 dorsal view; 4 same specimen as subadult, dorsal view). Diagnosis. Medium to large sized (carapace length between 2 and 7 mm ) Agelenidae with plumose hairs present (absent in Lycosoides Lucas, 1846 , Maimuna Lehtinen, 1967 , and Textrix Sundevall, 1833 ), AER and PER straight or only slightly curved in dorsal view ( Figs 3–5 ; both rows recurved in Lycosoides , Maimuna , and Textrix ; both rows procurved in Agelena Walckenaer, 1805 , Agelescape Levy, 1996 , Allagelena Zhang, Zhu & Song, 2006, and Benoitia Lehtinen, 1967 ) and moderately procurved in frontal view ( Figs 2 , 7 ; AER strongly procurved in Agelena , Agelescape , Allagelena , Benoitia , and Malthonica Simon, 1898 ; AER recurved in Lycosoides , Maimuna , and Textrix ), cheliceral retromargin with six or more teeth ( Fig. 10 ; up to six teeth in Tegenaria Latreille, 1804 ), straight or slightly curved trochanters ( Fig. 12 ; notched in Aterigena Bolzern et al., 2010 , Histopona Thorell, 1869 , and Malthonica ), lateral spines at patellae absent (as in Histopona , Malthonica , and T egenaria ; present in all other European genera), and colulus forming a rectangular or trapezoidal plate with distal margin straight or W-shaped ( Fig. 9 ; similar in Tegenaria , strongly reduced in Hadites Keyserling, 1862 and Malthonica ; two separated plates in all other European agelenids). Male genitalia are similar to those of Tegenaria specimens, but differ in having an RTA with one or two branches only ( Figs 14–15 , 17–18, 21 ; rather than more complex in most Tegenaria species), a typically massive conductor with a membranous transverse ridge ( Figs 14–15 (R), 17–20), and an only moderately elongated median apophysis with distal plate-like sclerite or without sclerite ( Figs 14–15 (MA), 17–20; sclerite also absent in Agelena , Agelescape , and Benoitia ; MA absent in Histopona and Textrix ). See also Bolzern et al. 2013 .