Arctosa costenola, 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 : 18-22

Arctosa costenola sp. nov.

Figs 12‒16 , 64

Type Material. Male holotype from Isla Barú, ca. 10°15'00.44"N 75°34'59.24"W, x.1999, Cartagena de Indias , Colombia, E. Florez et al leg. (ICN-Ar 1378); female paratype with same locality and same data (ICN-Ar 12745) .

Etymology. “Costeñol” is a regional dialect formed by a mixture of Spanish and Colombian Caribbean slang ( Lambraño 2011).

Diagnosis. Males of Arctosa costenola sp. nov. can be recognized among all the Neotropical species by the straight and untwisted embolus ( Fig. 13e ), the bulging posterior arm of the median apophysis ( Fig. 12a ), and the curved, beak-like, and keeled retrolateral arm of the median apophysis ( Fig. 13b ). Females of Arctosa costenola are distinguishable among all Neotropical species by the hood notched ( Fig. 14a ) and by the head of spermatheca (HS) rectangular in dorsal view, with two rounded bulges at the tip ( Figs 14b , 15e ).

Description. Male. Holotype (ICN-Ar 1378). Carapace brown, with a yellow longitudinal, median band, wider anteriorly to fovea. MLB tapering from fovea towards posterior margin of opisthosoma; submarginal bands discontinuous. Two parallel brown stripes behind the ocular area. Carapace covered with little black setae, MLB with sparse white setae; ocular area black, covered with long black setae and some short white ones. Sternum paler brown, with an incomplete yellow median band, and sparsely covered with brown bristles, which more abundant on the margins ( Fig. 15d ). Four long black bristles on the clypeal condyle anteriorly of AER. First row of eyes straight and shorter than the second row ( Fig. 15h ); AME slightly bigger than ALE; ALE resting on tubercles distally oriented; PME separated by more than half their radius. Labium light brown covered with brown bristles the same color as the chelicerae, boss short and poorly visible. Legs yellow, darker distally. All femora yellowish with black irregular patches; leg I and II light brown from patellae to tarsi ( Fig. 15g ). All tarsi with no scopula, tarsi III and IV with spinules; trichobothria in tibiae, tarsi and metatarsi distally increasing in size. Opisthosoma dark olive-gray, dorsally darker near the pedicel, with long white bristles in the middle and black bristles on both sides, cardiac mark pale yellow, lanceolate, flanked with irregular but symmetric yellow spots at both sides; venter dark yellow with some brown patches; spinnerets yellow.

Pedipalp ( Fig 12‒13 , 16 ) with cylindrical tibia, about two times longer than wide, with a ventral patch of bristles on the femur. Cymbium piriform with a strong apical spine; embolus straight, transversally oriented and not twisted ( Figs 12a , 13e , 16a ); subtegulum squared, in a notch in the tegulum, TA fine-pointed; Pa of median apophysis bulging and Ra with a dorsal keel, beak-like and curved in ventral view. Left palp with sperm ducts running diagonally from the prolateral to retrolateral, drawing a “V” pattern through the tegulum in a clockwise way ( Fig. 13b ).

Leg formula IV>I>II>III. Spination pattern: femur I p 0-0-1 d 1-1-1, II p 0-0-1 d 1-1-1, III d 1-2-1-3, IV d 1-1-3; patella I d 1bristle-1bristle ap, II p 1 d 1bristle-1bristle ap III p 1 d 1bristle-1 bristle ap r 1, IV p 1 d 1bristle -1bristle ap r 1; tibia I p 1v-1 d 1bristle v 2-1-2ap, II p d1-1 d 1bristle v 1-1-2ap III, p 1-1 d 1r-1 r 1-1 v 2-2-2ap, IV p 1-1 d 1r-1 r 1-1 v 2-2-2ap; metatarsus I p 1ap r 1ap v 2-2-2, II p 0-2-2ap r 0-0-2ap v 2-1r-1axp, III p 1-1ap d 2-0-2 r 1-1ap v 2-2-1ap, IV p 1-1-2ap r 1-1-0-2ap v 3-2-1ap.

Measurements: TL 5.42, CL 2.92, CCW 1.1, CTW 2.34, CCH 0.90, CTH 0.88. Eyes: AME 0.10, ALE 0.08, PME 0.26, PLE 0.18, interdistances: AME-AME 0.08, AME-ALE 0.04; PME-PME 0.16, POQ length 0.32, POQ posterior width 0.54, POQ anterior width 0.36. Chelicerae: length 1.16. Legs: length of segments femur + patella

+ tibia + metatarsus + tarsus = total length: pedipalp 1.00 + 0.48 +0.64 + - + 0.80 = 2.92, I 1.74 + 0.86 + 1.50 + 1.32 + 0.92 = 6.34, II 1.68 + 0.88 + 1.30 + 1.32 + 0.88 = 6.06, III 1.64 + 0.84 + 1.14 + 1.50 + 0.86 = 5.98, IV 2.36 + 1.02 + 1.78 + 2.36 + 1.16 = 8.68.

Female. Paratype (ICN-Ar 12745). Coloration and pattern as in male. Anterior eye row slightly procurved, ALE on small tubercles. All legs with the same color patterns as in males. Coloration and setae arrangement as in male ( Figs 15c, f, i ).

Genitalia with the median septum and transversal septum (TS) forming a trapezoidal pattern ( Fig. 15b ); TS with rounded lateral borders; atrium narrow, parallel to median septum; lateral lobes slightly sclerotized; anterior part of the MS depressed. FD fusiform and membranous. Copulatory ducts broad located at each rounded border of the TS. Spermatheca rectangular, with two small, rounded bulges ( Figs 14d , 15e ), SS thin, curved distally, VC wide ( Fig. 15e ). fertilization ducts thin, membranous, and postero-dorsal origin

Leg formula IV>I>II>III. Spination pattern: femur I p 0-0-1d d 1-1-0, II p 0-0-1 d 1-1-1, III p 0-1d-d1 d 1-1-1 r 0-1d-1d, IV p 0-1d-0-1d d 1-1-1 r 0-0-1d; patella I d 1bristle-1bristle ap, II d 1bristle-1bristle ap III p 1 d 1bristle-ap1 r 1, IV p 1 d 1bristle-ap1 r 1; tibia I p 1v-1 d 1bristle v 2-1-2ap, II p 1d-1 d 1bristle v 1-1-2ap III, p 1-1 d 1r-1 r 1-1 v 2-2- 2ap, IV p 1-1 d 1r-1 r 1-1 v 1-2-2ap; metatarsus I p 0-1v-1 d 1bristle-0 v 2-1-2, II p 0-1v-1ap d 1 bristle-0 v 2-0-1ap, III p 1-1-2ap d 1bristle-0 r 1-1-0-2ap v 2-2-1ap, IV p 1-1-2ap r 1-1-2ap v 1-3-2-1ap.

Measurements: TL 6.83, CL 3.50, CCW 1.58, CTW 2.58, CCH 1.14, CTH 1.10. Eyes: AME 0.16, ALE 0.10, PME 0.26, PLE 0.12, interdistances: AME-AME 0.12, AME-ALE 0.04; PME-PME 0.24, POQ length 0.50, POQ posterior width 0.66, POQ anterior width 0.46. Chelicerae: length 1.38. Legs: length of segments femur + patella + tibia + metatarsus + tarsus = total length: pedipalp 1.16 + 0.66 + 0.58 + - + 0.84 = 3.24, I 2.06 + 1.14 + 1.60 + 1.42 + 0.96 = 7.18, II 1.98 + 1.00 + 1.36 + 1.42 + 0.92 = 6.68, III 1.90 + 0.96 + 1.20 + 1.64 + 0.88 = 6.58, IV 2.46 + 1.20 + 2.12 + 2.70 + 1.34 = 9.82.

Variation. Females N = 3 (males N = 7) (range, mean±s.d.): TL 3.17 – 5.24, 4.27±0.70; CL 1.73 – 2.50, 2.20±0.28; CW 1.27 – 1.80, 1.60±0.17; (TL 2.82 – 5.20, 4.03±0.65; CL 1.62 – 2.73, 2.29±0.31; CW 1.17 – 1.97, 1.60±0.23)

Distribution. Colombia (Bolívar, Fig. 64 )

Figures

FIGURE 12. Arctosa costenola sp. nov. Male pedipalp holotype (ICN-Ar 1378) a–c (a, anterior; b, ventral; c, retrolateral). Scale bars: a–c, 0.25 mm. CMS cymbial macrosetae, DMA depression of median apophysis, E embolus, Pa posterior arm, Pp palea protuberance, Ra retrolateral arm, ST subtegulum, T tegulum, TA terminal apophysis

FIGURE 13. Arctosa costenola sp. nov. Male pedipalp (ICN-Ar 1378) a–c (a, prolateral; b, ventral; c, retrolateral). Pedipalp bulb d–h (d, prolateral; e, ventral; f, retrolateral; g posterior; h, anterior). i dorsal cymbium macrosetae. Scale bars: a–c, 0.20 mm, d–h, 100 µm, i, 200 µm. C conductor, DMA depression of median apophysis, E embolus, Ra retrolateral arm, Pa posterior arm, T tegulum, TA terminal apophysis, TK tegular keel, ST subtegulum,

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.

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 64. Geographic distribution records of Arctosa costenola sp. nov. (orange dot), Arctosa jibarosa sp. nov. (white dot), Arctosa tenebrosa comb. nov. (yellow diamond), Arctosa villa sp. nov. (blue diamond).