Weintrauboa contortipes, (KARSCH), 2003

Hormiga, Gustavo, 2003, Weintrauboa, a new genus of pimoid spiders from Japan and adjacent islands, with comments on the monophyly and diagnosis of the family Pimoidae and the genus Pimoa (Araneoidea, Araneae), Zoological Journal of the Linnean Society 139 (2), pp. 261-281 : 275-276

WEINTRAUBOA CONTORTIPES (KARSCH) NEW

COMBINATION

Linyphia contortipes Karsch, 1881: 39 .

Labulla contortipes Bösenberg & Strand, 1906: 170 , pl. 5, figure 49, pl. 11, figures 234, 237. Yaginuma, 1971: 43, figure 41.4. Shinkai & Takano, 1984: 27. Yaginuma, 1986: 72, figure 38.2. Chikuni, 1989: 48, figure 11.

Types

Male and female syntypes from Saga, Japan (Dönitz leg.), at Institut für Systematische Zoologie, Universität zu Berlin ( ZMB3545 ); examined. Although the syntype label states ‘ Saga, Japan, leg. Dönitz’ this locality seems incorrect, as the Japanese spiders that Karsch described between 1879 and 1881 were collected by Dönitz around Tokyo, where he was living at the time before moving to Saga (H. Ono, unpubl. data) .

Diagnosis

Males of W. contortipes differ from those of W. chikunii in the shape of the ectal cymbial process and paracymbium, the number of cymbial cuspules (more numerous in the latter species), the morphology of the PEP (larger and more complex in the former species) and in the degree of sinuosity of the metatarsus I base (less sinuous in W. chikunii ). The female genital morphology of the two Weintrauboa species differs significantly in ventral view; in W. contortipes the epigynum appears as a protrusion of the abdomen, a subtle bulge, whereas in W. chikunii it has a strongly marked cordiform appearance, darker in the medial region.

Description

Male (from Doi, Sakuto-Cho, Okayama Pref.; Fig. 4A ). Total length 5.43. Cephalothorax 2.54 long, 2.17 wide, 1.61 high. Sternum 1.55 long, 1.27 wide. Abdomen 2.64 long, 1.83 wide. AME diameter 0.19. Clypeus height 1.43 times one AME diameter. Chelicerae with three prolateral and three retrolateral teeth ( Fig. 3F ). Femur I 2.82 long, 1.11 times the length of cephalothorax. Metatarsus proximal third enlarged and sinuous, with a row of enlarged macrosetae ( Fig. 3G,H ). Metatarsus I trichobothrium 0.19. Pedipalp as in Figures 1A–J , 5A–E . Pedipalpal tibia with one prolateral and one retrolateral trichobothria.

Female (same locality as male; Fig. 4B ). Total length 6.88. Cephalothorax 2.95 long, 2.17 wide, 1.46 high. Sternum 1.55 long, 1.40 wide. Abdomen 4.22 long, 3.22 wide. AME diameter 0.21. Clypeus height 1.38 times one AME diameter. Chelicerae with three prolateral and four retrolateral teeth. Femur I 2.81 long, 0.95 times the length of cephalothorax. Metatarsus I trichobothrium 0.22. Epigynum as in Figures 2E,F , 3A– C , 10A.

Variation

Male cephalothorax ranges in length from 2.26 to 2.81 (n = 4). Female cephalothorax ranges in length from 2.14 to 3.12 (n = 8). Male total length ranges from 4.88 to 5.77 (n = 3). Female total length ranges from 4.65 to 8.00 (n = 8).

Natural history

Sheet web illustrated in Shinkai & Takano (1984: 27); the photograph shows an inclined (c. 45∞) sheet web built against a substrate, with little if any scaffolding above or below the web. Epigynal plugs are common.

Distribution

Ky ush - u - and Honsh u - islands ( Japan).

Material examined

Japan: Okayama Pref., Doi, Sakuto-cho, Aida-gun , 26.i.1990, Ko - ichi Nojima, 1 male, 1 female ( YIPC) ; Okayama Pref., Mt Takiyama, Nagi-cho, Katsuta-gun , 14.iii.1992, Kôichi Nojima, 1 male ( YIPC) ; Hiroshima Pref., Mt Gokurakuji, Hatsukaichi-shi , 3.v.1991, 1 female, Yoh Ihara ( YIPC) ; Hiroshima Pref., Taishakukyo Gorge, Tojo-cho, Hiba-gun , 19.vi.1996, 1 female, Yoh Ihara ( YIPC) ; Okayama Pref., Mt Takiyama, Nagi-cho, Katsuta-gun , 4.vi.1989, K oichi - Nojima, 2 female ( YIPC) ; Hiroshima Pref., Mt Gokurakuji, Hatsukaichi-shi , 26.i.1992, Yoh Ihara, 1 female ( YIPC) ; Japan: Rakusan , Shimane, 24.iv.1965, S. Kageyama, 1 female ( ZMUT) ; Mie Pref., R. Hashimoto , no. 6, 1 male ( ZMUT) ; ‘ Japan’, 3837 c. St. , 1 male, 1 female ( MNHN) .

Figures

Figure 1. Weintrauboa contortipes (Karsch) n. comb., male palp. A–F, from Doi, Sakuto-Cho, Okayama Pref., Japan; E–J, from Japan (MNHN 3837), partially expanded. A, ventral; B, caudoectal; C, ectal; D, mesal; E, dorsal; F, cymbium, apical; G, apical; H–J, details of tegular division. Scale bars, 0.5 mm.

Figure 2. Weintrauboa chikunii (Oi) n. comb. (A–D), W. contortipes (Karsch) n. comb. (E–F). A–F, male palp, from Juzhno-Sakhalinsk, Sakhalin Island, Russia; E,F, epigynum, Mt Takiyama, Nagi-cho, Katsuta-gun, Okayama Pref., Japan. A, mesal; B, ectal; C, dorsal; D, cymbium, apical; E, ventral; F, lateral. Scale bars, 0.5 mm (A–D), 0.25 (E,F).

Figure 3. Weintrauboa contortipes (Karsch) n. comb. (A–H), W. chikunii (Oi) n. comb. (I,J). A, epigynum (cleared), dorsal; B, epigynum (cleared), ventral; C, epigynum (cleared), dorsal (schematic); D, prosoma, dorsal; E, prosoma, ventral; F, prosoma, anterior; G, male first leg, lateral; H, male first metatarsus, dorsal; I, male first leg, lateral; J, male first metatarsus, dorsal. Scale bars, 0.1 mm (A–C), 0.5 (D–F, H,J), 1.0 (G,I).

Figure 4. Weintrauboa contortipes (Karsch). Male (A) and female (B) from Doi, Sakuto-Cho, Okayama Pref. (Japan). Carapace width 2.15 (male), 2.25 (female).

Figure 5. Weintrauboa contortipes (Karsch). A, paracymbium, ectal; B, tegular division, ectal; C, tegular division, detail; D, cymbial process; E, cymbial cuspules; F, male PLS.