Dysdera dushengi Lin, Chang et Li, 2020

Fomichev, Alexander A. & Marusik, Yuri M., 2021, Notes on the spider genus Dysdera Latreille, 1804 (Araneae: Dysderidae) in Central Asia, Zootaxa 5006 (1), pp. 73-89 : 82-84

Dysdera dushengi Lin, Chang et Li, 2020

Figs 3–4 , 13–18 , 26 , 34–36 , 41–43 , 52–53 , 58–60.

D. dushengi Lin, Chang et Li, 2020: 100 , f. 1A–D, 2A–B, 3, 4A–C, 5C (♂ ♀).

Material. KAZAKHSTAN: Almaty Region: ♂ ♀ ( ISEA, 001.8644), c. 15 km NNW from Karabastau Village, Tyr- nakty Natural Boundary , 43°53’N 75°30’E, 850–950 m, 20– 22.04.2016, R. Yu. Dudko .

Diagnosis. The male of D. dushengi is most similar to that of D. pamirica from Tajikistan in having the semi-

elliptical median crest (Cm), the abducted retrolateral crest (Cr) and the psembolus being two times longer than the tegulum (Te), but can be distinguished from it by having the tegulum and the psembolus being stretched in almost a straight line (compared to a 130° angle between them in D. pamirica ), the median crest being two times shorter than the tegulum (equal in length in D. pamirica ) and the hooked apex (Ax) of psembolus (straight in D. pamirica ) (cf. Figs 34–36 , 41–43 and figs 7–9 in Dunin (1992)). The female of D. dushengi is also similar to that of D. pamirica in the shape of trapezoidal dorsal arch of the diverticulum (Dd), but differs in having a distinct stalk (Sk) of the spermatheca which is absent from D. pamirica (cf. Figs 52–53 and fig. 10 in Dunin (1992)).

Description. Male. Total length 7.4. Carapace: 3.15 long, 2.45 wide. Abdomen: 4.25 long, 1.95 wide. AME 0.17, PME 0.14, PLE 0.14. General appearance as in Figs 3 , 13–15 . Prosoma and chelicerae orange. Palps and legs yellow. Abdomen and spinnerets beige. Leg measurements: I: 2.85, 1.75, 2.55, 2.7, 0.7 (10.55). II: 2.65, 1.55, 2.3, 2.55, 0.65 (9.7). III: 2.05, 1.15, 1.35, 2.1, 0.55 (7.2). IV: 2.65, 1.35, 2.1, 2.6, 0.65 (9.35). Leg spination: I: Fe p3. II: Fe p3. III: Fe p3 r1; Ti p5 r3 v6; Mt p6 r3 v2. IV: Fe d8 r1; Ti p4 r5 v6; Mt p4 r3 v5. Bulb as in Figs 26 , 34–36 , 41–43 . Length/width ratio 3.2. Posterior apophysis (Ap) lanceolate in lateral view. Psembolus with three crests that differ in shapes: obovate median crest, semi-oval prolateral crest (Cp) and triangular retrolateral crest. Psembolus apex bent towards median crest.

Female. Total length unknown (specimen with damaged abdomen). Carapace: 3.2 long 2.45 wide. AME 0.17, PME 0.14, PLE 0.16. Coloration as in male ( Figs 4 , 16–18 ). Leg measurements: I: 2.7, 1.65, 2.3, 2.35, 0.6 (9.6). II: 2.4, 1.5, 2.0, 2.2, 0.6 (8.7). III: 1.95, 1.1, 1.3, 1.9, 0.55 (6.8). IV: 2.5, 1.4, 2.0, 2.45, 0.65 (9.0). Leg spination: I: Fe p3. II: Fe p2. III: Fe d1 p3 r1; Ti p4 r3 v6; Mt p6 r4 v3. IV: Fe d6 r1; Ti p4 r3 v6; Mt p6 r4 v5. Endogyne as in Figs 52–53 . Spermatheca (St) fusiform, with pointed lateral arms (La) and clearly visible stalk. Dorsal arch of diverticu- lum trapezoidal, twice as long as wide. Transverse bar of the posterior diverticulum (Tb) straight, two times wider than spermatheca. Posterior diverticulum (Pd) square.

Distribution. Until now, the species has been known only from the type locality, the westernmost part of Xinji- ang Province of China, neighbouring Kazakhstan ( Figs 58–59 ). The present record in Almaty Region of Kazakhstan represents the westernmost limit of the species range. Both localities lie in the Ili River valley.

Figures

FIGURES 1–6. Dorsal habitus of Dysdera subcylindrica (1–2), D. dushengi (3–4) and D. mikhailovi sp. nov. (5–6). 1, 3, 5—male; 2, 4, 6—female. Scale bars=2 mm.

FIGURES 13–18. Prosoma of Dysdera dushengi male (13–15) and female (16–18). 13, 16—dorsal; 14, 17—lateral; 15, 18— ventral. Scale bars=1 mm.

FIGURES 25–30. Male palp (25–27) and bulb (28–30) of Dysdera subcylindrica (25, 28–30), D. dushengi (26) and D. mikhailovi sp. nov. (27). 25–28—prolateral; 29—anterior; 30—retrolateral. Scale bars: 25–27=0.5 mm, 28–30=0.2 mm. Ab- breviations: Ap–posterior apophysis, Ax–apex, C–crest, Se–stem of the psembolus, Sp–spine, Te–tegulum.

FIGURES 31–36. Psembolus of Dysdera subcylindrica (31–33) and bulb of D. dushengi (34–36). 31, 34—prolateral; 32, 35— anterior; 33, 36—retrolateral. Scale bars: 31–33=0.15 mm, 34–36=0.2 mm. Abbreviations: Ap–posterior apophysis, Ax–apex, C–crest, Cm–median crest, Cp–prolateral crest, Cr–retrolateral crest, Se–stem of the psembolus, Sp–spine, Te–tegulum.

FIGURES 41–46. Psembolus of Dysdera dushengi (41–43) and bulb of D. mikhailovi sp. nov. (44–46). 41, 44—prolateral; 42, 45—anterior; 43, 46—retrolateral. Scale bars: 41–43=0.15 mm, 44–46=0.2 mm. Abbreviations: Ap–posterior apophysis, Ax–apex, Cm–median crest, Cp–prolateral crest, Cr–retrolateral crest, Se–stem of the psembolus, Te–tegulum.

FIGURES 50–57. Endogyne of D. subcylindrica (50–51), D. dushengi (52–53), D. mikhailovi sp. nov. (54–55) and D. arnoldii (56–57). 50, 52, 54, 56—dorsal; 51, 53, 55, 57—ventral. Scale bars=0.2 mm.Abbreviations: Dd–dorsal arch of the diverticulum, La–lateral arm of the spermatheca, Pd–posterior diverticulum, Sk–stalk of the spermatheca, St–spermateca, Tb–transverse bar of the posterior diverticulum.

FIGURES 58–60. Collecting localities of the studied Dysdera species (58–59) and published records of other Central Asian Dysdera species, except for D. crocata (60). Triangle—Dysdera arnoldii, diamond—D. mikhailovi sp. nov., circle—D. dushengi, square—D. subcylindrica. Black symbols refer to the studied material, white symbols refer to literature-derived data. Some symbols could refer to more than one closely situated localities. The frame of Fig. 59 refers to the content of Fig. 58. The numbers in Fig. 60 refer to the following species: 1—D. aculeata; 2—D. arnoldii; 3—D. brignolii; 4—D. dushengi; 5—D. fedtschenkoi Dunin, 1992; 6—D. ferghanica Dunin, 1985; 7—D. kronebergi Dunin, 1992; 8—D. kugitangica; 9—D. kusnetsovi; 10—D. limitanea; 11—D. nenilini; 12—D. pamirica, 13—D. pococki; 14—D. subcylindrica; 15—D. tartarica; 16—D. tystshenkoi Dunin, 1989; 17—D. zarudnyi; 18—D. zonsteini Dimitrov, 2021; 19—D. mikhailovi sp. nov.