Arctosa jibarosa, Paredes-Munguía & Brescovit & Teixeira, 2024

Paredes-Munguía, Williams, Brescovit, Antonio D. & Teixeira, Renato A., 2024, Revision of Neotropical wolf spider genus Arctosa C. L. Koch, 1847 (Araneae: Lycosidae), with description of seven new species, Zootaxa 5414 (1), pp. 1-83 : 7

jibarosa group, females

1 Median septum (MS) with a longitudinal raised ridge ( Fig. 17a )…........................... Arctosa jibarosa sp. nov.

- Median septum (MS) completely flat ( Fig 22a ).............................................................. 2

2 Transversal septum posteriorly projected ( Figs 38a , 39b ).... Arctosa tenella (F.O. Pickard-Cambridge, 1902) comb. nov.

- Transversal septum aligned with epigastric furrow ( Figs 17a , 18e )............................................... 3

3 Head of spermatheca rounded ( Figs 8d , 9b )............................................ .. Arctosa conflicta sp. nov.

- Head of spermatheca differently shaped.................................................................. .. 4

4 Vulval chamber almost the same size of head of spermathecae ( Figs 22b , 23d ).................. Arctosa mineira sp. nov.

- Vulval chamber shorter than the head of spermatheca ( Fig. 37b )......................... Arctosa tenebrosa comb. nov.

Figures

FIGURE 8. Arctosa conflicta sp. nov. Epigynum (MUSM-ENT 505361) a, c, d (a, ventral; c, dorsal; d, basal), prosoma, b, e (b, lateral; e, frontal) Scale bars: a, c, d, 0.25 mm, b, e, 2 mm. CO copulatory opening, FD fertilization duct, HS head of spermatheca, VC vulval chamber.

FIGURE 9. Arctosa conflicta sp. nov. Epigynum (MUSM-ENT 505361) (a, ventral; b, dorsal) Scale bars: a–b, 0.1 mm. HS head of spermatheca, SS stalk of spermatheca.

FIGURE 17. Arctosa jibarosa sp. nov. Male pedipalp holotype (MUSM-ENT 500410) a–c (a, ventral; b, retrolateral; c, anterior). Scale bars: a–c, 0.25 mm. CMS, cymbium macrosetae, E embolus, Pa posterior arm, Pp palea protuberance, Ra Retrolateral arm, TA terminal apophysis.

FIGURE 18. Arctosa jibarosa sp. nov. Male pedipalp (MUSM-ENT 504111) a–c (a, prolateral; b, ventral; c, retrolateral). Pedipalp bulb d–i (d, prolateral; e, ventral; f, retrolateral; g, anterior; h, basal expanded; i, posterior). Scale bars: a–c, 0.2 mm, d–i, 200 µm. C conductor, DMA depression of median apophysis, E embolus, Pp palea protuberance, Pa posterior arm, Ra retrolateral arm, RS row of setae, ST subtegulum, TA terminal apophysis.

FIGURE 22. Arctosa mineira sp. nov. Epigynum (UFMG 3619) a–d (a, ventral; b, dorsal; c, posterior; d, anterior) Scale bars: a–d 0.25 mm. FD fertilization duct, HS head of spermatheca, MS median septum, SS stalk of spermatheca, VC vulval chamber.

FIGURE 23. Arctosa mineira sp. nov. Female habitus (UFMG 3619) a, c, e (a, dorsal; c, ventral; e, lateral) Epigynum b, d (b, ventral; d, dorsal) f, eggsac. Scale bars: a, c, e 1mm, b, d 0.1 mm, f 1 mm. HS head of spermatheca.

FIGURE 37. Arctosa tenebrosa (Keyserling, 1877) comb. nov. Male, habitus (ICN-Ar 1378) a, d, g, h (a, dorsal; d, ventral; g, lateral; h, frontal). Female, epyginum b, e (b, ventral; e, dorsal) Female habitus c, f, i (c, dorsal; f, ventral; i, lateral). Scale bars: a, d, g, 1 mm, h, 500 µm, b, e, 0.1 mm, c, f, i 2 mm. SS stalk of spermatheca. (* pointed lateral side of atrium).

FIGURE 38. Arctosa tenella (Keyserling, 1877) comb. nov. Male palp (ICN-Ar 2577) (a, ventral; b, retrolateral; c, apical). Scale bars: a–c, 0.25 mm. Pa posterior arm, Ra Retrolateral arm, TA terminal apophysis.

FIGURE 39. Arctosa tenella (Keyserling, 1877) comb. nov. Male palp (ICN-Ar 2577) a–c, i (a, retrolateral; b, ventral; c, prolateral; i, cymbium dorsal view). Pedipalp bulb (MUSM-ENT 508928) d–h (d, retrolateral; e, ventral; f, prolateral, g, basal, h, apical,) Scale bars: a–c, 0.2 mm, d–h, 100 µm, i, 200 µm. C conductor, CMS cymbium setae, DMA depression of median apophysis, E embolus, Pa posterior arm, Ra retrolateral arm, ST subtegulum, T tegulum, TA terminal apophysis.