Strotarchus michoacan, 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 : 34-35

Strotarchus michoacan new species

Figs. 116−117

Type material. Female holotype from Jiquilpan (102º41'W, 19º59'N), Michoacan , Mexico, May 9, 1963, W.J. Gertsch & W. Ivie coll., deposited in AMNH.

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

Diagnosis. Females of Strotarchus michoacan n. sp. resemble those of S. tropicus by the hexagonal atrium, but are easily distinguished by the highly coiled, extremely long, posteriorly enlarged copulatory ducts ( Figs. 116, 117 ).

Description. Male. Unknown.

Female (Holotype). Carapace orange, cephalic area red brown. Chelicerae red brown, fangs black. Endites and labium red brown, with white distal area. Sternum yellow with brown margins. Legs orange, with ventral surface of coxae, metatarsi and tarsi red brown. Abdomen dark gray, spinnerets orange. Total length 12.40. Carapace 4.50 long, 3.40 wide. Eye diameters: AME 0.30, ALE 0.22, PME 0.22, PLE 0.22. Chelicerae with 3 promarginal teeth, the median largest, and 2 retromarginal teeth, separated by three times their width. Leg measurements: femur I 4.30/ II 3.50/ III 3.00/ IV 4.10. Leg spination: I—femur d1-1-1, p0-1-1, r0; tibia d0, p1-1-0, r0, v2-2 -0; metatarsus d0, p0-1-0, r0, v2-2 - 1m. II—femur d1-1-1 or 1-1-0, p0-1-1, r0; tibia d0, p1-1-0, r0, v2-2 -0; metatarsus d0, p0-1-0, r0-0-1, v2-2 - 1m. III—femur d1-1-0, p1-1-1, r0-1-1; tibia d1-1-0, 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, p0-0-1, r0-0-1; tibia d0, p1-1-0, r1-1-0, v2-2 -1r; metatarsus d0, p1-1-2, r1-1-2, v2-2 - 1m. Epigynum: atrium hexagonal, large, anterior margin slightly projected medially; AP large, rounded posteriorly, projected laterally, median slit deep, without lateral notches, rectangular, bordering SS; CD parallel, curved, long; GK short, rounded, laterally oriented; SS enlarged medially; spermathecae not globose, wider than long ( Figs. 116, 117 ).

Distribution. Known only from the type locality.

Other material examined. None.

Figures

FIGURES 114 – 117. Strotarchus tlaloc new species, female: 114) epigynum, ventral; 115) epigynum, dorsal. Strotarchus michoacan new species, female: 116) epigynum, ventral; 117) epigynum. Scale bar = 0.5 mm.