Strotarchus gandu, Bonaldo, Alexandre B., Saturnino, Regiane, Ramírez, Martín J. & Brescovit, Antonio D., 2012

Bonaldo, Alexandre B., Saturnino, Regiane, Ramírez, Martín J. & Brescovit, Antonio D., 2012, A revision of the American spider genus Strotarchus Simon, 1888 (Araneae: Dionycha, Systariinae), Zootaxa 3363, pp. 1-37 : 25-26

Strotarchus gandu new species

Figs. 97−100

Type material. Male holotype from Fazenda Pedra Branca, Gandu [39º30'W, 13º45'S], Bahia, Brazil, Feb. 5, 1970, Ceplac coll.; female paratype from Reserva Mata do Pau Ferro (35º44'W, 06º57'S), Areia, Paraíba, Brazil, Sept. 23–29, 1990, A.D. Brescovit et al. coll., both deposited in IBSP ( IBSP 161754 and IBSP 42282, respectively); female paratype from Fazenda Martinica, Mucuri [39º34.2'W, 18º4.8'S], Bahia, Brazil, Oct. 12, 1970, Ceplac coll. ( MNRJ 6287).

Note. Right legs I, III and IV of the holotype are missing.

Etymology. The specific name is a noun in apposition taken from the type locality.

Diagnosis. Males of Strotarchus gandu n. sp. differ from those of other species with a basal embolar fold traversing the apical portion of tegulum by the large, cup-shaped embolar process ( Figs. 97, 98 ). Females share with those of S. piscatorius a median notch on the posterior atrial margin, differing by the parallel copulatory ducts and by the longer glandular knob ( Figs. 99, 100 ).

Description. Male (Holotype). Carapace orange, margins paler. Chelicera red brown. Endites and labium red brown with white apexes. Sternum yellow, with brown margins. Legs orange, with base of the articles darker. Abdomen green gray, spinnerets yellow. Total length 5.80. Carapace 2.40 long, 1.60. wide. Eye diameters: AME 0.30, ALE 0.25, PME 0.27, PLE 0.25. Chelicerae with 3 promarginal teeth, the median largest, and 2 separated retromarginal teeth. Leg measurements: femur I 2.20/ II 1.80/ III 1.50/ IV 1.80. Leg spination: I—femur d1-1-0, p0-1- 1, r0-0-1; tibia d0, p1-1-0, r1-1-0, v2-2 -0; metatarsus d0-1-0, p1-1-1, r1-1-2, v2-2 - 1m. II—femur d1-1-0, p0-1-1, r0-0-1; tibia d0, p1-1-0, r1-1-0, v2-2 -0; metatarsus d0-1-0, p1-1-0, r1-1-2, v2-2 - 1m. III—femur d1-1-1, p0-1-1, r0- 0-1; tibia d0-1-0, p1-1-0, r1-1-0, v1 p-1p-0; metatarsus d0-1-0, p1-1-2, r1-1-2, v1 r-2- 1m. IV—femur d1-1-1, p0, r0- 0-1; tibia d0, p0, r0, v1-1 -0; metatarsus d0, p0-0-1, r1-1-2, v2 - 0- 1m. Palpal tibiae long, approximately one third of the cymbial length; RTA sub-squared, slightly serrated apically, with retrolateral pointed tip; ppRTA small, laRTA absent. Tegulum sub-circular, basal and distal margins flattened; proximal fold of reservoir ample, ventrally oriented. TA oval, inserted ventrally on retrolateral side of tegulum; EB not visible ventrally in unexpanded bulb; BEF narrow; EP large, cup-shaped; EA sinuous, arising prolaterally ( Figs. 97, 98 ).

Female (Paratype IBSP). Coloration as in male. Total length 7.60. Carapace 2.50 long, 2.00. Eye diameters: AME 0.30, ALE 0.25, PME 0.30, PLE 0.25. Chelicerae with 3 promarginal teeth, the median largest, and 2 retromarginal teeth, separated by three times their width. Leg measurements: femur I 2.20/ II 1.90/ III 1.70/ IV 2.00. Leg spination: I—femur d1-1-0, p0-1-1, r0; tibia d0, p1-1-0, r1-1-0, v2-2 -0; metatarsus d0, p1-1-0, r1-1-0, v2-2 -1. II—femur d1-1-1, p0-0-1, r0; tibia d0-1-0, p1-1-0, r0, v1 r-2-0; metatarsus d0, p1-1-1, r1-1-0, v2-2 -2. III—femur d1-1-1, p0-0-1, r0-0-1; tibia d0-1-0, p1-1-0, r1-1-0, v1-1 p-0 or 1p-1p-0; metatarsus d0-1-0, p1-1-2, r1-1-2, v2-2 - 1m. IV—femur d1-1-1, p0-0-1, r0-0-1; tibia d0, p0, r1-1-0, v1 p-1p-0; metatarsus d0, p1-1-2, r1-1-2, v2-2 - 1m. Epigynum: atrium sub-oval, with posterior margin projected posteriorly; AP large, rounded posteriorly, median slit deep, ample, with lateral notches, narrowed anteriorly; CD curved, long, with several helicoid folds; GK with base slightly constricted, laterally oriented; SS not enlarged medially; spermathecae rounded ( Figs. 99, 100 ).

Variation. Two females: total length 6.40−7.60; carapace 2.50−2.60; femur I 2.40−2.50.

Distribution. Northeast Brazil.

Other material examined. None.

Figures

FIGURES 97 – 102. Strotarchus gandu new species, male: 97) palp, ventral; 98) palp, retrolateral; female: 99) epigynum, ventral; 100) epigynum, dorsal. Strotarchus silvae new species, male: 101) palp, ventral; 102) palp, retrolateral. Abbreviations: BEF ― Basal embolar fold; EA ― Embolar apex; EP ― Embolar process; TA ― tegular apophysis. Scale bar = 0.5 mm.