Two new species of Yaginumaella, Prószyński 1976 from Yunnan, China (Araneae, Salticidae)

Abstract The present paper deals with two new species of Yaginumaella, Yaginumaella lushuiensis sp. n. (female and male) and Yaginumaella pseudoflexa sp. n. (female and male). The male of Yaginumaella lushuiensis sp. n. differs from the related species Yaginumaella flexa Song & Chai, 1992 in ventral view of palpal organ. The female of Yaginumaella lushuiensis sp. n. differs from the related species Yaginumaella urbanii Żabka, 1981 by: 1) hoods locate at the anterior area of epigynum and far away from the copulatory openings; 2) epigynum about circular; 3) copulatory openings transverse. The male of Yaginumaella pseudoflexa sp. n. differs from the related species Yaginumaella bulbosa Peng, Tang & Li, 2008 in ventral view of palpal organ: 1) basal portion of embolus touches the margin of genital bulb. 2) distal portion of tibial apophysis covers the posterior margin of cymbium and far away from the margin of genital bulb. The female of Yaginumaella pseudoflexa sp. n. differs from the related species Yaginumaella urbanii Żabka, 1981 by: epigynum about as long as wide; hoods locate at the anterior area of the epigynum, above the outside area of the copulatory openings and far away from the copulatory openings. Photos of body and copulatory organs, line drawings of copulatory organs, as well as the locality map are provided. Descriptions of morphology are given.


Introduction
Yaginumaella was established by Prószyński in 1979 with the type species Y. ususudi. A total of 42 species have been described mainly from subtropical Himalayan and Eastern Palaearctic areas (World Spider Catalog 2016). Żabka (1980, 1981) revised the diagnosis of the genus and described 27 new species. Up to now, 14 species have been recorded from China (Prószyn'ski 1979;Żabka 1980;Żabka 1981;Song and Chai 1992;Xie and Peng 1995;Yang et al. 1997;Peng et al. 2002;Zhu et al. 2005;Zhang and Zhu 2007).

Material and methods
All specimens were kept in 75% ethanol, examined, measured, and drawn with an Olympus SZX16 stereomicroscope and an Olympus BX53 compound microscope. Photos were taken with a digital camera Canon PowerShot G12 mounted on an Olympus SZX16. Compound focus images were generated using Helicon Focus software (3.10).
All measurements are given in millimeters. Leg measurements are given as: total length (femur, patella + tibia, metatarsus, tarsus). The abbreviations used in text include: AER anterior eye row; ALE anterior lateral eyes; AME anterior median eyes; CD copulatory ducts; CO copulatory openings; E embolus; EFL length of eye; H hood; MOA median ocular area; PER posterior eye row; PLE posterior lateral eyes; PME posterior median eyes; S spermatheca; TA tibial apophysis.

Taxonomy
Yaginumaella Prószyński, 1976 Females in Yaginumaella have sclerotized blind hoods on epigyne, which are far away from the posterior edge, and differ in size and location. Copulatory ducts are of different length, with an internal ridge in the majority of species. The shape and size of spermathecae differ in various species. Palpal organ in males rather simple, with end of embolus lying in a special groove on the ventral surface of cymbium usually more or less expanded laterally. Seminal receptacle thick. Cymbium densely covered with setae. Tibial apophysis robust and heavily sclerotized. Species differ in length and shape of embolus, bulb, and cymbium. Etymology. The specific name refers to the type locality, Lushui County. Diagnosis. The male of the new species can be distinguished from all known congeneric species in ventral view of palpal organ by: embolus short, spatuliform; genital bulb without distinct posterior lobe; tibial apophysis extends to the top of genital bulb; embolus about 1/2 length of genital bulb. The female of the new species can be distinguished from all known congeneric species by: epigynum about circular; copulatory openings transverse.
Description. Male (holotype): Total length 4.60. Cephalothorax 2.15 long, 1.75 wide. Abdomen 2.35 long, 1.50 wide. Clypeus height 0.10. Carapace black-brown, with black margin, basal area of each eye, anterior and lateral margins of ocular area black. Thoracic region with two longitudinal dark bands. Marginal areas of carapace, anterior and lateral margins of ocular area densely covered with white hair; ocular area with thick dark brown hair; fovea short, longitudinal and black; cervical groove indistinct, radial groove dark brown. Sternum oval, covered with short brown hair, central area bulged, light yellow with gray edge. Clypeus narrow, height less than the radius of AME, light brown, promargin with white hair. Chelicerae dark brown, with brown hair, two promarginal and one retromarginal teeth (Fig. 6). Labium brown with brown hair, terminal area lightly colored. Palp and legs brown, legs with clear dark brown annuli. Eye sizes and interdistances: AER 1.50, PER 1.40, ALE 0.25, PLE 0.15, AME 0.50, EFL1.00. Measurements of legs: I 5.00 (1.50, 2.00, 1.00, 0.50), II 3.75 (1.00, 1.50, 0.75, 0.50),   Abdominal ventral: anterior area light brown, median area with one black longitudinal stripe, lateral areas with scattered grayish-black patches. Spinnerets brown.
Male palp (Figs 2-3, 4-5): tibia longer than wide in ventral view, with several long prolateral macrosetae in retrolateral view. Genital bulb with membrane structure. Embolus slender and about 1/2 length of genital bulb, originates from the position of 10:00 o'clock, its tip reaches to the position of 13:00 o'clock in ventral view. Bulb squat, median portion widest. Sperm ducts obvious, its diameter about 1/6 width of bulb.
Distribution. China (Yunnan). Etymology. The specific name is the combination of the Latin prefix "pseudo" and "flexa", referring to the similarity of the new species to Y. flexa Song and Chai, 1992. Diagnosis. The male of this new species can be separated from all known congeneric species in ventral view of palpal organ by: basal portion of embolus touches the margin of genital bulb; distal portion of tibial apophysis covers the posterior margin of cymbium and far away from the margin of genital bulb. The female of this new species can be separated from all known congeneric species by: epigynum about as long as wide; copulatory openings almost parentheses-shaped; hoods locate above the outside area of the copulatory openings.
Description. Male (Holotype): Total length 5.40. Cephalothorax 2.60 long, 1.90 wide; Abdomen 2.80 long, 1.70 wide. Clypeus 0.15 high. Carapace brown, with black margin, basal area of each eye, anterior and lateral margins of ocular area black; Marginal areas of carapace and thoracic region with one longitudinal yellow brown band. Marginal areas of carapace, anterior margin of ocular area densely covered with white hair, sparsely covered with brown hairs; fovea short, longitudinal and reddish- brown; cervical groove indistinct, radial groove dark brown. Sternum scutiform, covered with short brown hair, dark brown with gray edge. Clypeus dark brown, with long brown setae. Promargin with dense hair. Chelicerae brown to dark brown, with brown hair; 2 promarginal and 1 retromarginal teeth (Figs 18 Epigyne (22)(23) as long as wide, with two distinct anterior hoods. Copulatory openings almost parentheses-shaped, far away from the hoods. Copulatory ducts thick and sinuous. Spermathecae big, squat, close to each other.