Arctosa sapiranga Silva & Lise 2009

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 : 35

Arctosa sapiranga Silva & Lise 2009

Figs 28‒33 , 66

Arctosa sapiranga Silva & Lise, 2009: 27 , figs 124–133. Male holotype from Arroio Feitoria, 29°35'43"S 51°2'56"W, 234 m, Sapiranga , Rio Grande do Sul, Brazil, 19.ii.2008, E.L.C. Silva leg., deposited in MCTP 19998, examined. Female paratype, same data, MCTP 19999, examined.

Other material examined. BRAZIL. Tocantins: 1♂, Sandovalandia / Araguaçu , Fazenda Praia Alta II, ca. 10°47'27.99"S 49°37'13.25"W, 186 m, 5–13.vii.2001, L.S.Rocha leg. ( IBSP 12008 ) ; Distrito Federal: 1♂, Fercal, Mata (MT-2.6), ca. 15°36'07.14"S 47°52'26.02"W, 909 m, Â.S. Zerbini leg. (UnB 5456) ; Goiás: 7♂, Cavalcante, Fazenda Miraflores , ca. 13°48'49.78"S 47°25'51.47"W, 804 m, 19.xii.2012, P.C. Motta et al. leg. (UnB 6843) . Minas Gerais: 1♀, Lavras, Cachoeira de Farias , ca. 17°26'20.81"S 41°50'9.50"W, (soil, riverbank, gallery forest), 931 m, 18.ii.1993, R.L.C. Baptista leg. ( MNRJ 6512 ) . São Paulo: 1♂ 1♀, Salesópolis, Estação Biológica de Boracéia , 23°37'51"S 45°52'11"W, (in grasses on the riverside), ~ 983 m, 28.ii–3.iii.1992, R.L.C. Baptista leg. ( MNRJ 6501 ) . Paraná: 1♀, Pinhais, ca. 25°23'55.33"S 48°55'36.50"W, Serra da Farinha Seca , 1019 m, 15–20.ix.1995 ( MCTP 7666 ) . Rio Grande do Sul: 1♀, Santa Maria, Santo Antão , ca. 29°39'23"S 53°50'49.89"W, ~ 222 m, 2.ii.1989, J.S. Fernandes leg. ( MCTP 39791 ) . ARGENTINA. Misiones: 1♀, San Javier, Arroio Guerrero , ca. 27°47'16.28"S 55°9'8.83"W, 106 m, 11–21.iv.1989, Equipe Garabi leg. ( MCTP 3055 ) . Entre Ríos: 1♀, Parque Nacional El Palmar, ca. 31°51'51.42"S 58°15'32.41"W, ii.1981, P. Gollobof leg. (MACN-Ar 24197) .

Emended diagnosis. Males of Arctosa sapiranga resemble Arctosa serii Roth & Brown, 1976 by the similar palea region, but differ by the large, bulging, membranous palea protuberance (Pp) of A. sapiranga ( Figs 29e , 32a ; Silva & Lise 2009: fig. 6, missindicated as term). Additionally, the combination of a triangular posterior arm and bulging retrolateral arm of the median apophysis distinguishes A. sapiranga from A. serii . Females of A. sapiranga are recognized from other neotropical species by a keel on median septum ( Fig. 30a, f, g, i ; Silva & Lise 2009: fig. 9) like Arctosa perita ( Dondale & Redner 1983a: fig. 46) but differs from the latter by the pear-shaped head of spermatheca and very small vulval chamber ( Figs 30e , 33b ).

Description. Male and female were described by Silva & Lise, 2009. However, some remarks are presented here since somatic and genitalic details were passed over or misinterpreted. The median apophysis is not corkscrew shape ( Silva & Lise, 2009; fig. 6) but an excavated triangle ( Figs 28a, f , 31b, e ). Likewise, the structure misnamed as “term” ( Silva & Lise 2009: figs 6, 12) is certainly a pronounced palea protuberance, diagnostic for males of A. sapiranga ( Figs 29e, h , 32a ) and not a terminal apophysis. The conical papilla on the female epigynal plate is visible and richly illustrated here ( Figs 33a, d ).

Variation. As we observed, São Paulo female specimens shown variation in the atrium which was wider than the southern Brazilian specimens ( Figs 30g ‒j ). Male pedipalps present slight variation on posterior arm and retrolateral arm proportions ( Figs 28a–c ) when compared with São Paulo specimens ( Figs 28f–h ). Slight variations on the posterior arm and retrolateral arm of specimens from São Paulo show a smaller projection and a slightly wider base ( Figs 28f‒h ).

Distribution. Brazil (Rio Grande do Sul, and new records from the states of Tocantins, Distrito Federal, Goiás, Minas Gerais, São Paulo, and Paraná) and Argentina (Misiones and Entre Ríos) ( Fig. 66 ).

Figures

FIGURE 28. Arctosa sapiranga Silva & Lise, 2009. Male pedipalp. a–c. Pedipalp, holotype, Rio Grande do Sul (MCTP 19999) (a, ventral; b, retrolateral; c, prolateral). d–e. Palpal bulb (d, anterior; e posterior). f–h. Paratype, São Paulo (MNRJ 6501), (f, retrolateral, g, ventral, h, anterior). Scale bars: a–h, 0.25mm. DMA depression of MA, E embolus, MA median apophysis, Pa Posterior arm, Ra Retrolateral arm, SD seminal duct, ST subtegulum, T tegulum, TA Terminal Apophysis.

FIGURE 29. Arctosa sapiranga Silva & Lise, 2009. Male. Pedipalp a–c. Pedipalp, holotype, Rio Grande do Sul (MCTP 19999) (a, prolateral; b, ventral; c, retrolateral). d–h. Palpal bulb (MCTP 19997) (d, prolateral; e, ventral; f, retrolateral; g, posterior; h, anterior). i. Chelicerae. Scale bars: a–c, 200 µm; d–h, 100 µm; i, 500 µm. E, embolus, DMA, depression of MA, Pa posterior arm, Ra retrolateral arm, SF striae file, TA terminal apophysis, TF tegular furrow.

FIGURE 30. Arctosa sapiranga Silva & Lise 2009. Epigynum a–c. Paratype, Sapiranga, Rio Grande do Sul (MCTP 19999) (a, ventral; b, dorsal; c, anterolateral). d–f. Variation, Sapiranga, Rio Grande do Sul (MCTP 39791) (d, ventral; e, anterior; f, lateral). g–j. Variation Salesópolis, São Paulo (MNRJ 6501) (g, ventral; h, dorsal; i, lateral; j, anterodorsal). Scale bars: a–j, 0.25 mm. CO copulatory opening, FD fertilization duct, H hood, HS head of spermatheca, MS median septum, TS, transversal septum, VC vulval chamber.

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 32. Arctosa sapiranga Silva & Lise, 2009. Male. Pedipalp (MCTP 28548) (a, ventral; b, detail TA; c, close up of MA; d, detail Pa; e, protuberance on tegulum). Scale bars: a, 250 µm; b, e 50 µm; c, 100 µm; d, 25 µm. CMS cymbium seate, E embolus, MA median apophysis, Pa posterior arm, Pp palea protuberance, Ra retrolateral arm, ST subtegulum, T tegulum, TA terminal apophysis.

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 66. Geographic distribution records of Arctosa mineira sp. nov. (rose dot), Arctosa sapiranga (black dot), Trochosa humicola comb. nov. (cyan diamond).