Eucteniza zapatista Bond & Godwin, 2013

Valdez-Mondragon, Alejandro & Cortez-Roldan, Mayra R., 2016, On the trapdoor spiders of Mexico: description of the first new species of the spider genus Aptostichus from Mexico and the description of the female of Euctenizazapatista (Araneae, Mygalomorphae, Euctenizidae), ZooKeys 641, pp. 81-102 : 88-95

Eucteniza zapatista Bond & Godwin, 2013 Figs 21-24, 25-27, 28-31, 32-39, 40-44, 45-49, 50-51

Eucteniza zapatista Bond & Godwin, 2013: 54, f. 48-52 (Dm)

Type data.

MEXICO: Puebla: 1♂ holotype (EU012) (not examined), from Paso de Cortés (lat 19.1167°, lon -98.76676°, 3000 m), 18-July-1943, C. Bolivar Col. Holotype deposited in AMNH.

Material examined.

MEXICO: Tlaxcala: 4♂♂ (LATLAX-Ara0031) (pitfall traps) from 1.5 km al Oeste de la Estación Científica del Parque Nacional La Malinche (PNLM) (lat 19.24544°, lon -98.00336°, 3250 m), Municipio Ixtenco, 25-April-2016, A. Valdez, M. Cortez, A. Juárez Cols. 1♂ (LATLAX-Ara0033) from Carretera Perimetral con entronque Albergue IMSS Parque Nacional La Malinche (PNLM), Municipio Ixtenco, 4-May-2016, A. Ramírez Col. 1♀ (LATLAX-Ara0032) (hand collected) from Parque Nacional La Malinche (PNLM) (hand collected), El Pasaje (lat 19.25304°, lon - 97.97942°, 3030 m), Municipio Ixtenco, 03-July-2016, V. Jiménez, A. Díaz Cols.

Diagnosis.

Bond and Godwin 2013: "Male Eucteniza zapatista Bond and Godwin, 2013 leg I morphology is similar to Eucteniza diablo Bond and Godwin, 2013; however it lacks tarsal spines and has a more inflated or swollen tibia (Figs 32, 33, 36, 40-44). Males can be further distinguished from all other species by having an extensive patch of spines on the retrolateral distal aspect of the palpal tibia (Figs 28 –30)”. Also, ventrally tibia I with very stout and paired megaspines, close each other (Figs 36, 38). Females with similar spermathecae to Eucteniza diablo , however in Eucteniza zapatista the spermathecae has a dark stalk and the bulbs with porous sculpture (Fig. 49), whereas in Eucteniza diablo only the basal part of the bulbs is dark and the bulbs lack porous sculpture ( Bond and Godwin 2013: fig. 36).

Redescription.

Male: Specimen collected using pitfall traps, preserved and observed in 80% ethanol. Measurements: Total length (prosoma + opisthosoma) 17.68. Carapace 8.30 long, 7.40 wide. Clypeus length 0.80. Diameter of AME 0.46, ALE 0.40, PME 0.25, PLE 0.30. Labium: LBl 0.88, LBw 1.31. Sternum: STRl 4.70, STRw 4.25. Leg lengths: I femur 7.70/ patella 4.30/ tibia 5.90/ metatarsus 5.10/ tarsus 3.10/ total 26.10; II- 7.00/ 3.40/ 5.20/ 5.50/ 3.20/ 24.30; III- 5.90/ 3.30/ 3.75/ 5.90/ 3.70/ 22.55; IV- 7.20/ 3.80/ 6.00/ 6.50/ 3.70/ 27.20. Leg formula: 4-1-2-3. Prosoma: Cara pace longer than wide, protruding anteriorly, with surface smooth, setose in posterior part, hexagonal shaped, dark brown in anteriorly and lighter posteriorly (Figs 21, 23). Ocular region slightly elevated (Fig. 26). Foveal groove deep and procurved, U-shaped (Fig. 23). AER slightly procurved, PER recurved. Largest AME, smallest PME (Fig. 26). Sternum longer than wide, pyriform shaped, dark orange, setose, with sigilla (Fig. 24). Posterior sternal sigilla large and elongate, medial pair of anterior sigilla moderate in size, anterior pair small and marginal (Fig. 24). Labium wider than long, brown, with long setae anteriorly, without cuspules (Fig. 25). Endites long and setose, with an apical-prolateral inconspicuous conical apophysis, without cuspules (Fig. 25). Chelicerae: Promargin furrow with 7 teeth, retromargin furrow with approximately 18 -20 small denticles. Rastellum consisting of 6-8 spines on a mound. Opisthosoma: Longer than wide, setose, gray, without pattern dorsally; lighter gray ventrally (Figs 21, 22). Spinnerets beige (Fig. 27). PMS small and rounded, single segment, with spigots. PLS long and conical, all 3 segments with spigots: basal segment length> median segment> distal segment. Legs: Very light tarsal scopulae on legs I, II, III (Fig. 39), absent in IV. Tibiae, metatarsi and tarsi with trichobothria, lacking pattern, only tarsi with slightly staggered dorsal row, variable in number. Legs spination pattern: Tibia I: with paired ventral megaspines (Figs 32, 33, 36) on prominent base (Fig. 38); tibiae II: with 1 thin and long megaspine (Figs 34, 35) on a slender base (Fig. 37); tibiae III and IV: scattered long spiniform setae; metatarsi and tarsi with scattered spination pattern. Pedipalps: Articles setose. Femora brown, long and cylindrical. Patellae brown, lighter ventrally (Figs 28, 29). Tibiae brown, lighter ventrally, long and cylindrical, widened in middle part (Figs 28, 29). Cymbium brownish and setose, without spines (Figs 28-30). Bulb oval, located toward internal part of the pedipalp (Figs 30, 31). Embolus short, thin and curved, pointing toward retrolateral part of the tibia (Figs 28-31).

Description.

Female. Similar to the male, differences: Specimen collected manually, preserved and observed in 80% ethanol. Measurements: Total length (prosoma + opisthosoma) 29.50. Carapace 12.20 long, 11.10 wide. Clypeus length 0.80. Diameter of AME 0.47, ALE 0.46, PME 0.23, PLE 0.43. Labium: LBl 1.31, LBw 1.87. Sternum: STRl 7.50, STRw 6.50. Leg lengths: I femur 9.10/ patella 5.10/ tibia 5.70/ metatarsus 4.30/ tarsus 2.50/ total 26.70; II- 7.60/ 5.10/ 4.80/ 4.00/ 2.20/ 23.70; III- 6.50/ 4.80/ 3.00/ 4.20/ 3.10/ 21.60; IV- 8.90/ 5.50/ 6.70/ 6.00/ 3.40/ 30.50. Leg formula: 4-1-2-3. Prosoma: Carapace markedly more anteriorly protruding than the male, small setae posteriorly, lighter brown anteriorly and posterior part markedly lighter color than the male (Figs 45, 46). Anterior part of ocular region more setose than the male. Sternum darker orange than the male (Fig. 48). Anterior pair of small and marginal sigilla more visible than the male (Fig. 48). Labium wider than long, brown, with long setae anteriorly, with nine cuspules (Fig. 47). Endites brown in retrolateral part, light orange toward prolateral part, with numerous cuspules (Fig. 47). Chelicerae: Promarginal furrow with nine teeth, retromarginal furrow with approximately 19 small denticles (Fig. 47). Rastellum consists of 5-7 spines on a mound. Opisthosoma: Setose, lighter gray toward anterior part, darker gray coloration than the male; ventrally, genital area dark brown (Fig. 48). Spinnerets dark brown. Legs: Short and stout legs compared with the male (Figs 45, 50, 51). Long and dense scopulae on metatarsi and tarsi I, II, absent in III and IV. Legs spination: Legs without megaspines; Tibiae I: v(1+1+1+1); tibiae II: v (1+1+1); tibiae III and IV: scattered long spiniform setae; metatarsi I and II: v(1+2); metatarsi III: v(2+2+1); metatarsi IV: scattered long spiniform setae; tarsi I and II: without spines; tarsi III and IV: with scattered spination pattern. Pedipalps: Articles stouter and darker coloration than the male, setose, with long and dense scopulae on tarsi. Tarsi with a single claw; spination pattern: v(1+1). Tibiae with scattered long spiniform setae. Genital area: Bulky, trapezoidal shape, setose, brown color (Fig. 48). Spermathecae with single oval bulbs, paired, with dark basal stalk, the bulbs seems to be porous (Fig. 49).

Variation.

Males (N = 5): Cl 6.8-8.3, 7.62 ± 0.62; Cw 6.5-7.3, 6.84 ± 0.38; STRl 4.30-4.90, 4.60 ± 0.25; STRw 3.80-4.30, 4.00 ± 0.19; PTl 3.50-4.20, 3.90 ± 0.27; PTw 1.5-1.8, 1.62 ± 0.13; Tibiae I (length): 4.60-5.90, 5.18 ± 0.55. There is variation in the width of the tibia I and in the position of the ventral megaspines; in three specimens megaspines are close together and in two the megaspines are separated (Figs 40-44).

Natural history.

All specimens examined were collected in the PNLM, a temperate pine-oyamel forest at 3000-3250 m of elevation (Fig. 52). The four specimens (LATLAX-Ara0031) were collected using pitfall traps in a pine forest (Fig. 52). The specimen (LATLAX- Ara0033) was hand collected walking on the ground. The female (LATLAX- Ara0032) was hand collected from a vertical burrow of ~50-60 cm deep located at 2 m on a wall along road-cut in a pine forest, the female was also found in the bottom of the burrow (Figs 50, 51).

Distribution.

MEXICO: Puebla, Tlaxcala (Fig. 53).