Figs. 1 – 18
Types. Holotype male. MEXICO: Veracruz, San Andrés Tuxtla. Estacion de Biologia Tropical “Los Tuxtlas” IB-UNAM (18°34’56.1” N, 95°4’32.1” W, elev. 172-217 m), tropical wet forest, leaf litter, collected with pitfall traps, 20-27 September 2017 (CNAN-T01484). Paratypes: 1 ♀, same data as holotype except: 9-16 February 2018, E. Gonzalez-Santillán (CNAN-T01489); 1 ♀, same data as holotype except: 20-27 September 2017, pitfall traps (CNAN-T01490), 1 ♂, same data (CNAN-T01491).
Etymology. The specific epithet is a noun in apposition referring to the Spanish word for the Olmec culture that inhabited from 3000 to 400 b. c. in the Southern part of Veracruz to Tabasco states.
Diagnosis. Males of Aamunops olmeca sp. n. resemble those of A. chimpa sp. n. and A. misi sp. n. by having a long embolus (Figs. 7, 25, 44), differ from these species by having an embolus two times longer than palpal tibia, slender, curved, with a straight and pointed tip (Figs. 7, 16, 17). Female genitalia of A. olmeca sp. n. is similar to those of A. chimpa sp. n. and A. misi sp. n. by the presence of a sclerotized bifid duct associated to a rigid transverse plate (Figs. 11, 35), differing from these species by having a short V-shaped duct and by the anterior margin of the plate strongly projected posteriorly (Figs. 11, 15).
Description. Male (Holotype). Total length 2.85. Cephalothorax 1.15 long, 0.90 wide. Sternum 0.80 long, 0.65 wide. Legs: I 3.30 (1.00) (0.56) (0.80) (0.56) (0.38); II 3.02 (0.90) (0.52) (0.72) (0.52) (0.36); III 2.44 (0.70) (0.36) (0.50) (0.56) (0.32); IV 3.54 (0.98) (0.44) (0.84) (0.90) (0.38). Carapace, sternum, chelicerae, labium, palps, and legs orange; coxae and trochanters lighter (Figs. 1, 4, 5). Endites pale orange, anterior margin lighter (Fig. 5). Abdomen dorsal pattern dark gray, ventral surface lighter (Figs. 1, 3). Anal tubercle and spinnerets light orange. Crista short, covering less than a half of metatarsus in leg I, covering less than 1/4 of metatarsus in leg II (Figs. 12, 13). Paired claws with six teeth (Fig. 18). PLS longer than PMS. Prolateral brush of palpal tibia with seven setae (Fig. 17); bulb globose, spherical; spermatic duct with a small, hyaline process (Fig. 16); embolus about two times the length of the palpal tibia (Fig. 7), slender, curved, with a straight and pointed tip (Figs. 16).
Female (Paratype). Total length 4.35. Cephalothorax 1.75 long, 1.3 wide. Sternum 1.15 long, 0.90 wide. Legs: I 4.08 (1.28) (0.70) (1.00) (0.70) (0.40); II 3.82 (1.20) (0.70) (0.90) (0.70) (0.32); III 3.32 (0.96) (0.50) (0.74) (0.74) (0.38); IV 4.90 (1.34) (0.66) (1.14) (1.28) (0.48). Coloration as in male. Abdomen as in male. Crista long, almost covering the metatarsus length (Fig. 14), wider on leg I. Paired claws with six teeth (Fig. 18). PLS same size as PMS. Internal genitalia with the anterior margin of plate strongly projected posteriorly (Fig. 15), postero-median invagination narrow (Figs. 11, 15); membranous anteromedian receptaculum formed by a short, V-shaped sclerotized duct that protrudes from the anterior surface of plate leading to a membranous oval sac (Figs. 11, 15).
Variation. N = 2. ♂ Total length 2.14. Cephalothorax 1.12 long, 0.86 wide. Sternum 0.76 long, 0.60 wide. Yellowish coloration. ♀ Total length 3.75. Cephalothorax 1.60 long, 1.25 wide. Sternum 1.10 long, 0.80 wide. Dark orange coloration.
Natural history. All specimens were caught in a tropical wet forest. Three specimens were caught in leaf litter with pitfall traps; only one specimen was found by cryptic searching.
Distribution. Known only from the type locality (Fig. 83).