Arctosa pacaya, 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

Identification key for Neotropical Arctosa species cinerea group, males

1 Depression of median apophysis (DMA) wide ( Figs 14b , 47b )................................................. 2

- Depression of median apophysis (DMA) narrow ( Fig. 7d )..................................................... 4

2 Terminal apophysis (TA) broad ( Fig. 25b )............................................... Arctosa pacaya sp. nov.

- Terminal apophysis (TA) narrow ( Fig. 15e )................................................................ 3

3 Palea protuberance ending in an acute tip, prolateral arm of the median apophysis bulging ( Figs 14a, b ), embolus straight ( Fig. 16a )............................................................................ Arctosa costenola sp. nov.

- Palea protuberance bulging ( Fig. 47e ), embolus rotated on its own axis ( Figs 46a , 47b )............. Arctosa villa sp. nov.

4 Posterior arm of median apophysis (Pa) bulging ( Roth & Brown 1976: fig. 3)..................................... 5

- Posterior arm of median apophysis (Pa) triangular ( Jiménez & Dondale 1984: fig. 3)............................... .. 6

5 Palea protuberance absent ( Dondale & Redner 1983a: fig. 73)......................... Arctosa littoralis ( Hentz, 1844)

- Palea protuberance bulging ( Dondale & Redner 1983a: fig. 57)...................... Arctosa serii Roth & Brown, 1976

6 Tip pointed palea protuberance acuminated and sclerotized ( Jiménez & Dondale, 1984, fig. 5)....................................................................................... Arctosa denticulata Jiménez & Dondale, 1984

- Tip pointed palea protuberance bulging and membranous ( Figs 31e , 33a )........... Arctosa sapiranga Silva & Lise, 2009

Figures

FIGURE 7. Arctosa conflicta sp. nov. Male habitus (ICN-Ar 12814) a–c (a, dorsal; b, ventral; c, lateral), pedipalpal bulb d–g (d, ventral; e, prolateral; f, anterior; g, posterior). Scale bars: a–g, 200 µm. DMA depression of MA, E embolus, Pa posterior arm, Pp Palea protuberance, Ra retrolateral arm, SD seminal duct, ST subtegulum, TA terminal apophysis.

FIGURE 15. Arctosa costenola sp. nov. Male habitus (ICN-Ar 1378) a, d, g–h (a, dorsal; d, ventral; g, lateral; h, frontal). Epigynum (ICN-Ar 12745) b, e (b, ventral; e, dorsal). Female habitus (ICN-Ar 12745) c, f, i (c, dorsal; f, ventral; i, lateral) Scale bars: a, d, g, 1 mm, b, e, 0.1 mm, h, 500 µm, c, f, i, 2 mm. H, hood, HS head of spermatheca, MS median septum, SS stalk of spermatheca, TS transversal septum, VC vulval chamber.

FIGURE 16. Arctosa costenola sp. nov. Male. Pedipalpal bulb SEM (ICN-Ar 1378) a–c (a, ventral; b, retrolateral details, c, detail of Pa). Scale bars: a, 150 µm, b–c, 50 µm. E embolus, MA median apophysis, Pa posterior arm, Ra retrolateral arm, ST subtegulum, T tegulum, TA Terminal apophysis.

FIGURE 25. Arctosa pacaya sp. nov. Male pedipalp (MUSM-ENT 505356) a–c (a, retrolateral; b, ventral; c, prolateral). Pedipalp bulb d–f, h (d, retrolateral; e, ventral; f, prolateral; h, anterior). g, apical cymbium setae, i, protuberance on male chelicerae. Scale bars: a–c, 0.2 mm, d–h, 100 µm, i, 125 µm. C conductor, DMA depresion of median apophysis, E embolus, P palea, Pa posterior arm, SD seminal duct, ST subtegulum, T tegulum, TA terminal apophysis.

FIGURE 31. Arctosa sapiranga Silva & Lise, 2009. Male, habitus (MCTP 19998) a, b, g–h. Holotype, Rio Grande do Sul (a, dorsal; d, ventral; g, lateral; h, frontal). Female, epigynum (MCTP 19999) b, e (b, ventral; e, dorsal), c, f, i. Female paratype (MCTP 19999) (c, dorsal; f, ventral; i, lateral). Scale bars: a, d, g 1 mm; h, 500 µm; b, e, 200 µm; c, f, i, 2 mm.

FIGURE 33. Arctosa sapiranga Silva & Lise, 2009. Female, epigynum (MCTP 28548) (a, ventral; b, dorsal; c, plumose setae; d, conic papillae). Scale bars: a, 150 µm; b, 200 µm; c, 25 µm; d, 20 µm. CO copulatory opening, HS head of spermatheca, MS median septum.

FIGURE 46. Arctosa villa sp. nov. Epigynum, paratype (MUSM-ENT 500107) (a,ventral; b, dorsal; c, anterior; d, posterolateral) Scale bars: a–d, 0.25mm. BS base of spermatheca, FD fertilization duct, H hood, HS head of spermatheca, MS median septum, VC vulval chamber.

FIGURE 47. Arctosa villa sp. nov. Male habitus (MUSM-ENT 500104) a, d, g (a, dorsal, d, ventral; g, lateral). Epigynum (MUSM-ENT 500107) b, e (b, dorsal; e, ventral) Female habitus c, f, h–i (c, dorsal; f, ventral; h, frontal; i, lateral). Scale bars: a, d, g, 1 mm, b, e, 0.2 mm, h, 500 µm, c, f, i, 2 mm.

FIGURE14. Arctosacostenola sp. nov. Femaleepigynum (ICN-Ar12745) a–d(a,ventral;b, dorsal;c, anterior;d, posterolateral). Scale bars: a–d, 0.25 mm. FD fertilization duct, H hood, HS head of spermatheca, MS median septum, SS stalk of spermatheca, VC vulval chamber.