Strotarchus tamaulipas, 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 : 19-20

Strotarchus tamaulipas new species

Figs. 8 , 27 , 50−52 , 81−84

Type material. Male holotype and four male paratypes from Gomez Farias (ravine litter, 300m.) [93º9'W, 23º3'N], Tamaulipas , Mexico, Jun. 0 6, 1983, S. & J. Peck coll. deposited in AMNH (two males), MPEG 19115 (1 male), IBSP 43402 (1 male); female paratype from Cueva del Abra [El Abra, 98º58.8'W, 23º6.6'N], Tamaulipas , Mexico, Jun. 1964, T. Raines coll. ( AMNH).

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

Diagnosis. Males of Strotarchus tamaulipas n. sp. resemble those of S. tropicus by the basal embolar fold disposed parallel in relation to the tegulum, and by the tegular apophysis inserted retrobasally. They differ by the long palpal tibia, smooth base of the embolus and by the entire, lamellar embolar process ( Figs. 81, 82 ). Females can be distinguished from those of S. monasticus n. sp. and the other species with convergent copulatory ducts by the large, sub-oval atrium with procurved posterior margin, without lateral projections ( Figs. 83, 84 ).

Description. Male (Holotype). Carapace orange, with darker cephalic area, thoracic groove brown. Chelicerae, endites and labium red brown. Sternum yellow with brown margins. Legs orange. Abdomen light gray, spinnerets orange. Total length 7.40. Carapace 3.20 long, 2.50 wide. Eye diameters: AME 0.20, ALE 0.20, PME 0.20, PLE 0.18. Chelicerae with 3 promarginal teeth, the median largest, and 2 retromarginal teeth, separated by twice their width. Leg measurements: femur I 3.70/ II 3.40/ III 2.90/ IV 3.60. Leg spination: I—femur d1-1-1, p0-1-1-1, r0-1-1-1; tibia d0, p1-1-0, r1-1-0, v2-2 -0; metatarsus d0, p0-1-1, r0-1-1, v2-2 - 1m. II—femur d1-1-1, p0-1-1-1, r0- 1-1-1; tibia d0, p1-1-0, r1-1-0, v2-2 -0; metatarsus d0, p0-1-1, r0-1-1, v2-2 - 1m. III—femur d1-1-1, p1-1-1, r1-1-1; tibia d0-1-0, p1-1-0, r1-1-0, v2-2 -0; metatarsus d0-1-0, p1-1-2, r1-1-2, v2-2 - 1m. IV—femur d1-1-1, p1-1-1, r0-0-1; tibia d0, p1-1-0, r1-1-0, v2-2 -0; metatarsus d0, p1-1-2, r1-1-2, v2-2 - 1m. Palpal tibiae thin, almost as long as cymbium (0.8 times); RTA sub-triangular with a rounded tip; ppRTA small, rounded; laRTA absent. Tegulum sub-oval, proximal fold of reservoir ventrally oriented; TA egg-shaped; BEF restricted to retrolateral side of bulbus, EP small, unsclerotised, rectangular; EA arising retrolaterally ( Figs. 81, 82 ).

Female (Paratype). Coloration as in male. Total length 7.20. Carapace 2.80 long, 2.10. Eye diameters: AME 0.16, ALE 0.18, PME 0.16, PLE 0.20. Chelicerae as in male. Leg measurements: femur I 3.60/ II absent/ III 2.70/ IV 3.40. Leg spination: I—femur d1-1-1, p0-1-1-1, r0-1-0; tibia d0, p1-1-0, r1-1-0, v2-2 -0; metatarsus d0, p1-1-1, r0-1-1, v2-2 - 1m. II—femur - absent. III—femur d1-1-1, p0-1-1-1, r0-1-1; tibia d0-1-0, p1-1-0, r1-1-2, v2-2 -1r; metatarsus d0-1-0, p1-1-2, r1-1-2, v2-2 - 1m. IV—femur d1-1-1, p0-1-1, r0-0-1; tibia d0, p1-1-0, r1-1-0, v2-2 -2; metatarsus d0-1-1, p1-1-2, r1-1-2, v2-2 - 1m. Epigynum: AP small, truncated posteriorly, median slit without lateral notches, rounded anteriorly. CD with few helicoid folds; GK small, rounded, base slightly constricted, anteriorly oriented; SS enlarged posteriorly, gently curved; spermathecae continuous with SS ( Figs. 83, 84 ).

Variation. Six males: total length 7.40−8.80; carapace 3.00−4.40; femur I 3.50−4.30.

Distribution. Mexico.

Other material examined. MEXICO. Tamaulipas , Gomez Farias (ravine litter, 300m.) [93º9'W, 23º3'N], 1 male, Jun. 6, 1983, S. & J. Peck coll. ( SEM preparation, AMNH).

Figures

FIGURES 8 – 15. Strotarchus tamaulipas new species, male, chelicerae: 8) basal condylus. Strotarchus beepbeep new species, male: 9) chelicerae, ventral. Strotarchus piscatorius (Hentz, 1847), female: 10) chelicerae, posterior; 11) chelicerae, mesal; 12) serrula; 13) maxillary glands; 14) endites and labium; 15) sternum.

FIGURES 24 – 32. Strotarchus tropicus (Mello-Leitão, 1917), tarsal organ, female: 24) leg I. Strotarchus piscatorius (Hentz, 1847), tarsal organ, female: 25) leg I, left. Strotarchus beepbeep new species, tarsal organ, male: 26) leg II. Strotarchus tamaulipas new species, tarsal organ, male: 27) leg III. Strotarchus tropicus (Mello-Leitão, 1917), thricobothria, female: 28) tibia I; 29) tarsus I. Strotarchus piscatorius (Hentz, 1847), female: 30) tarsus I. Strotarchus beepbeep new species, male: 31 - 32) metatarsus, leg II.

FIGURES 48 – 53. Strotarchus tropicus (Mello-Leitão, 1917), male: 48) palp, embolar process; 49) palp, ventral. Strotarchus tamaulipas new species, male: 50) apophysis tibial retrolateral; 51) palp, retrolateral; 52) palp, ventroapical. Strotarchus beepbeep new species, male: 53) palp, lateroventral.

FIGURES 81 – 88. Strotarchus tamaulipas new species, male: 81) palp, ventral; 82) palp, retrolateral; female: 83) epigynum, ventral; 84) epigynum, dorsal. Strotarchus tropicus (Mello-Leitão, 1917), male: 85) palp, ventral; 86) palp, retrolateral; female: 87) epigynum, ventral; 88) epigynum, dorsal. Scale bar = 0.5 mm.