Irura pengi Guo, Zhang & Zhu, 2011

Wang, Cheng & Li, Shuqiang, 2022, A new genus and nine species of jumping spiders from Hainan Island, China (Araneae, Salticidae), ZooKeys 1118, pp. 39-72 : 39

Irura pengi Guo, Zhang & Zhu, 2011

Figs 4 , 5

Irura pengi Guo, Zhang & Zhu, 2011: 91, figs 11-16 (♂, holotype, not examined).

Material examined.

2♂ 3♀ (TRU-JS 0625-0629), China: Hainan: Ledong County, Jianfengling National Nature Reserve, Tianchi (18°44.45'N, 108°57.49'E, ca. 860 m), 11.iv.2019, C. Wang & Y.F. Yang leg.

Diagnosis.

The male of Irura pengi Guo, Zhang & Zhu, 2011 resembles I. trigonapophysis (Peng & Yin, 1991) known from Fujian, and Guangdong of China in having a flagelliform embolus originating at ~ 10 o’clock position on the bulb, but it can be distinguished by the straight RTA and terminally curved retrolateral cymbial apophysis in retrolateral view (Fig. 4B ), whereas the RTA is slightly curved dorsally and the retrolateral cymbial apophysis is straight in I. trigonapophysis ( Peng 2020: fig. 127b-d). The species also resembles that of I. uniprocessa Mi & Wang, 2016 known from Yunnan of China by the similar copulatory organs, but it can be distinguished by the following characters: (1) the presence of RTA (Fig. 4A-C ), which is absent in I. uniprocessa ( Mi and Wang 2016: figs 1C-E, 2a, b); (2) the absence of epigynal hoods and the distance between the anterior chambers of spermathecae is more than their width (Fig. 5B ), whereas present and the distance between the anterior chambers of spermathecae is <1/2 their width in I. uniprocessa ( Mi and Wang 2016: figs 1F, G, 2d, e).

Description.

Male (Figs 4 , 5C, D, F, G ). Total length 4.52. Carapace 2.06 long, 2.35 wide. Abdomen 2.50 long, 2.26 wide. Eye sizes and inter-distances: AME 0.50, ALE 0.29, PLE 0.24, AERW 1.91, PERW 2.21, EFL 1.12. Leg measurements: I 7.02 (2.13, 1.63, 1.58, 1.03, 0.65), II 3.98 (1.28, 0.75, 0.85, 0.70, 0.40), III 3.32 (1.08, 0.58, 0.63, 0.63, 0.40), IV 3.87 (1.33, 0.63, 0.81, 0.70, 0.40). Carapace sub-square, red-brown, covered with dense, iridescent scales, with an irregular dark patch medially in eye field. Chelicerae red-brown, with two promarginal teeth and one large retromarginal tooth. Endites longer than wide, with dense, dark brown setae at inner-distal margins. Labium colored as endites, bearing dense, dark setae at anterior edges. Sternum sub-oval, covered with thin setae. Legs I robust, with a single and two pairs of macrosetae ventrally on tibiae and metatarsi, respectively; other legs yellow to dark. Abdomen oval, dorsum orange-red to dark brown, with longitudinal orange band anteromedially, three pairs of muscle depressions and several pairs of irregular orange patches medially and laterally, and several herringbone-shaped streaks posteriorly, covered entirely by a big scutum; venter brown to dark brown. Palp (Fig. 4A-C ): tibia longer than wide, with straight RTA ~ 1/2 the tibia length, and blunt apically in retrolateral view; cymbium elongated, setose, with tapered, baso-retrolateral apophysis curved distally to a pointed tip, reaches anterior 1/3 of tibia in retrolateral view; bulb flat, almost round; embolus flagelliform, tapered, originates at ~ 10 o’clock position on bulb, slightly shorter than bulb length.

Female (Fig. 5A, B, E ). Total length 4.26. Carapace 1.58 long, 2.06 wide. Abdomen 2.74 long, 2.29 wide. Eye sizes and inter-distances: AME 0.48, ALE 0.26, PLE 0.21, AERW 1.74, PERW 2.03, EFL 0.97. Leg measurements: I 4.33 (1.40, 1.00, 0.85, 0.60, 0.48), II 3.11 (1.00, 0.53, 0.70, 0.50, 0.38), III 2.70 (0.88, 0.48, 0.48, 0.48, 0.38), IV 3.27 (1.13, 0.55, 0.63, 0.58, 0.38). Habitus (Fig. 5E ) similar to that of male except pale and with less-developed retromarginal cheliceral tooth. Epigyne (Fig. 5A, B ): wider than long, with broad, posteriorly-located atrium; copulatory openings beneath the antero-bilateral edge of atrium; copulatory ducts short, tapered, connected to the junction ducts of anterior and middle chambers of spermathecae; spermathecae divided into three oval chambers; fertilization ducts elongated, originate from anterior edges of the smallest posterior chamber of spermathecae.

Distribution.

Only known from Hainan Island, China.

Figures

Figure 4. Male palp of Irura pengi Guo, Zhang & Zhu, 2011 A ventral B retrolateral C dorsal. Scale bars: 0.1 mm. Abbreviations: CA - cymbial apophysis; E - embolus; RTA - retrolateral tibial apophysis.

Figure 5. Irura pengi Guo, Zhang & Zhu, 2011 A epigyne, ventral B vulva, dorsal C male habitus, dorsal D ditto, ventral E female habitus, dorsal F male carapace, frontal G male chelicera, posterior. Scale bars: 0.1 mm (A, B, G); 0.5 mm (C-F). Abbreviations: AS - anterior chamber of spermatheca; At - atrium; CO - copulatory opening; FD - fertilization duct; MiS - median chamber of spermatheca; JS - junction duct of spermathecae; PS - posterior chamber of spermatheca.