Phylogenetic placement of eight poorly known spiders of Microdipoena (Araneae, Mysmenidae), with descriptions of five new species Zhang, Qiuqiu Lin, Yucheng ZooKeys 2023 2023-08-21 1175 333 373 https://zoobank.org/2FDF9219-4F93-4C86-9D58-672A52EEDC1D Zhang & Lin, 2023 Zhang & Lin 2023 Arachnida Mysmenidae Microdipoena CoL Animalia Microdipoena thatitou Araneae 0 333 Arthropoda species thatitou sp. nov.   Fig. 18  Type material.  Holotype♀ (NHMSU-No.83) Laos: Champasak Province, Muang Bachieng, Ban Lak 35, That Itou ( 15°11.628'N, 106°06.105'E; 810 m elev.), 26.VI.2009, PW. Jaegerand S. Bayer leg.  Etymology. The specific name is derived from the type locality; noun in apposition.  Diagnosis. This new species can be distinguished from other congeners by the thickened, long S-shaped fertilization ducts and the entire membranous scape including distal end (Fig. 18D-F).   Figure 18.  Microdipoena thatitousp. nov., female from Laos Ahabitus, dorsal Bhabitus, ventral Chabitus, lateral Depigyne, ventral Evulva, ventral Fvulva, dorsal. Abbreviations: CD= copulatory duct, FD = fertilization duct, S = spermathecal, Sp = Scape. Scale bars: 0.50 mm ( A-C), 0.10 mm ( D-F).  Description.  Female (holotype): Total length 0.82. Carapace 0.24 long, 0.32 wide, 0.24 high. Clypeus 0.06 high. Sternum 0.23 long, 0.18 wide. Abdomen 0.58 long, 0.58 wide, 0.51 high. Length of legs: I 1.13 (0.32, 0.12, 0.23, 0.22, 0.24); II 1.22 (0.24, 0.12, 0.20, 0.18, 0.20); III 0.62 (0.20, 0.08, 0.14, 0.10, 0.10); IV 0.84 (0.24, 0.12, 0.18, 0.14, 0.16).  Somatic characters  (Fig. 18A-C). Coloration: carapace yellow centrally, yellow-brown marginally. Ocular base black. Chelicera, endites yellow, labium yellow, sternum pale yellow with two symmetrical black stripes. Legs yellow-brown. Abdomen silvery yellow dorsally, black with symmetrical white and yellow spots, silvery brown with two symmetrical silvery yellow stripes ventrally. Prosoma: carapace nearly pear-shaped in dorsal view. Cephalic part unelevated. Sternum scutiform, covered with sparse setae. Legs: covered with setae and bristles. Femurs I and II with sclerotized femoral spot. Abdomen: nearly spherical, covered with sparse pale setae.  Epigyne(Fig. 18D-F): the structure can be seen through the cuticle. Scape membranous, soft, without weakly sclerotized distal end. Copulatory duct membranous, coiled under the spermathecae. Paired spermathecae oval. Fertilization ducts long, thick, and sclerotized, originated from the lower edge of the spermathecae, the composite structure of fertilization ducts and spermathecae S-shaped.  Male.Unknown.  Distribution. Laos (Champasak)