Phintella arcuata, Huang, Yi, Wang, Cheng & Peng, Xian-Jin, 2015

Huang, Yi, Wang, Cheng & Peng, Xian-Jin, 2015, Five new species of Phintella Strand, 1906 (Araneae, Salticidae) from the Wuling Mountains, China, ZooKeys 514, pp. 25-42 : 26-27

Taxon classification Animalia Araneae Salticidae

Phintella arcuata sp. n. Figs 1, 2, 3

Type material.

Holotype: ♂, China, Hunan: Shimen County, Huping mountain Township, Jinban Mountain Village, (29°26.288'N, 110°46.681'E, 554 m), 12 June 2014, C. Wang, B. Zhou, JH. Gan and YH. Gong leg. Paratypes: 1♀, Daling Village, (30°02' 20.22N, 110°37' 30.25E, 436 m), 18 October 2014, the collectors same as holotype; 1♀, Daling Village, (30°01' 37.69N, 110°37' 32.56E, 341 m), 19 October 2014, the collector same as holotype; 1♀, Daling Village, (30°01.681'N, 110°37.681'E, 677 m), 18 June 2014, the collectors same as holotype.

Etymology.

The specific name comes from the Latin arcuata (curved), referring to the form of yellow area at the middle part of male carapace.

Diagnosis.

The male of this new species is very similar to Phintella aequipeiformis Zabka, 1985, especially in retrolateral view of male palp, but can be distinguished from the latter by: 1) the terminal sperm duct angle (TSDA) almost 60° (Fig. 3A) versus about 15° in Phintella aequipeiformis ; 2) the distal end of retrolateral tibial apophysis curved in ventral view (Figs 1C, 3A) versus straight in Phintella aequipeiformis ; 3) Lamellar process almost semicircular (Figs 1C, 3A) versus almost triangular in Phintella aequipeiformis ; 4) dorsum of opisthosoma with 3 lines of markings, the first and second lines composed of 4 and 3 white stripes respectively (Fig. 1A) versus only with 2 lines in Phintella aequipeiformis . The female of this new species is similar to Phintella linea (Karsch, 1879), but can be distinguished from the latter by: 1) atrium margin distinct, located at the terminal portion of epigyne (Figs 2B, 3D) versus indistinct in Phintella linea ; 2) spermathecae pyriform (Figs 2C, 3E) versus scutiform in Phintella linea ; 3) spermathecae separated by less than one-seventh of their width in dorsal view (Figs 2C, 3E) versus about one-third of their width in Phintella linea ; 4) base of fertilization ducts extend beyond the base of copulatory ducts in dorsal view (Figs 2C, 3E) versus almost at same level in Phintella linea .

Description.

Male: Total length 4.20. Prosoma 2.15 long, 1.75 wide. Opisthosoma 2.05 long, 1.30 wide. Clypeus 0.14 high. Carapace (Fig. 1A) blackish-brown, inflated, covered with white and brown long hair. Bilateral of eye field and posterior sides of carapace with white curved stripes covered by white hair, anterior of thorax with a curved yellowish area behind eye field. Eye bases and margins of carapace black. Fovea reddish-brown, longitudinal, cervical and radial grooves indistinct. Eye sizes and inter-distances: AME 0.50, ALE 0.31, PLE 0.28, AERW 1.35, PERW 1.40, EL 1.03. Chelicerae (Figs 1B, 3C) dark brown, with 2 promarginal teeth and 1 retromarginal. Endites broader at base, anterior margin with bristles. Labium dark brown, with brown thin hair. Sternum colored as labium, anteriorly straight and posteriorly subacute, with thin hair. Leg trochanters, coxae and tarsi yellowish-brown, others dark brown. Leg spinnation: tibiae I and II with three pairs, metatarsi I and II with two pairs of long spines. Measurements of legs: I 7.16 (2.05, 3.01, 1.55, 0.55), II 5.55 (1.70, 2.10, 1.20, 0.55), III 5.70 (1.75, 1.95, 1.45, 0.55), IV 5.80 (1.80, 2.00, 1.45, 0.55). Leg formula: 1432. Dorsum of opisthosoma (Fig. 1A) long oval, anterior area with two pairs of white stripes, median area with two pairs of muscle impressions and three transverse white stripes, posterior end with one cambered white stripes, covered with light dots. Venter pale brown, with four longitudinal lines formed by light dots at middle part.

Palp (Figs 1 C–D, 3 A–B): tibia slightly longer than wide, retrolateral apophysis thin, with a swollen base and slightly curved tip. Posterior lobe large, curved at terminal end and slightly sharp at the tip. Tegulum bump situated posteriorly, almost triangular in retrolateral view. Embolus thin, originated at the top on tegulum, the tip almost extended to the position of 1:00 o’clock. Lamellar process big, almost semicircular. Sperm duct visible and the terminal sperm duct angle almost 60°.

Female: Total length 4.10. Prosoma1.97 long, 1.41 wide. Opisthosoma 2.06 long, 1.43 wide. Clypeus 0.14 high. Carapace (Fig. 2A) dark brown, anterior margin covered with dark brown hair. Bilateral of eye field with white stripes formed by white hair, anterior median of thorax with a triangular yellowish area behind eye field. Margins of carapace and eye bases black. Eye sizes and inter-distances: AME 0.48, ALE 0.27, PLE 0.26, AERW 1.41, PERW 1.33, EL 1.02. Fovea reddish-brown, longitudinal, cervical and radial grooves indistinct. Chelicerae, endites, labium, sternum similar to male except for the lighter color. Legs yellow. Leg spinnation: as same as male. Measurements of legs: I 3.05 (0.95, 1.20, 0.50, 0.40), II 2.90 (0.90, 1.10, 0.50, 0.40), III 3.45 (1.00, 1.30, 0.75, 0.40), V 4.00 (1.25, 1.45, 0.90, 0.40). Leg formula: 4312. Dorsum of opisthosoma (Fig. 2A) pale brown, the markings similar to male, covered with light dots. Venter grey brown, bilateral of posterior portion with two longitudinal white stripes, and two longitudinal lines formed by light dots behind epigastric furrow.

Epigyne (Figs 2 B–C, 3 D–E) with arc band-shaped atrium margins anteriorly. Copulatory openings small, situated at the median area, the distance between them about equal to spermathecal width. Basal plate arched, with wave-like protruding parts. Copulatory ducts slightly thick, curved at middle part. Spermathecae pyriform, close to each other, separated by less than one-tenth of their width.

Distribution.

China (Hunan).