Guadana alpahuayo Rheims 2021, sp. n.

Guadana alpahuayo sp. n.

Figs 1−14, 57, 67, 81

Type material. Holotype: ♂ from PERU: Loreto: Iquitos, San Juan Bautista, Zungarococha, Arboretum del UNAP (-3.8298, -73.3753), 8−9 April 2013, C.A. Rheims & R. P. Indicatti leg. (MUSM). Paratypes: 2♂, 2♀, with the same data as holotype (IBSP 166391, 165059, MUSM).

Etymology. The specific name refers to the Alpahuayo Mishana National Park, that is adjacent to the type locality; noun in apposition.

Diagnosis. Males of G. alpahuayo sp. n. resemble those of G. arawak sp. n. by the palps with embolus bearing a sub-distal keel at tip (Figs 67−68) and dRTA barely reaching the proximal margin of the alveolus (Figs 2, 18). They are distinguished from the latter species by the basal projection with smooth margins (Figs 2, 11, 67) (jagged in the latter species). Females resemble those of G. manauara by the epigyne with MS bearing pair of epigynal pockets, opening anteriorly and medially connected (Figs 4, 77). They are distinguished from the latter species by the MS roughly rectangular, slightly wider anteriorly (much wider posteriorly in G. manauara); epigynal pockets roughly two times wider than long (four times wider than long in G. manauara) and by the presence of scape-like projection at the posterior margin of the epigynal pockets (Figs 4, 13).

Description. Male (holotype): Prosoma pale brownish orange with pale brown margins and irregular pale brown marks between thoracic striae and at base of cephalic region; fovea and thoracic striae pale brown; eye borders black. Chelicerae, legs and palps pale yellowish orange with brownish gray marks at base of setae and spines. Labium brownish orange, distally cream colored. Endites pale yellowish orange. Sternum yellowish with brown margins. Opisthosoma pale yellowish cream colored; dorsally with two pairs of round muscular impressions, the posterior largest; ventrally with two curved lines of muscle impressions. Spinnerets pale yellowish cream colored (Figs 6−7). Total length 6.4. Prosoma 3.0 long, 3.4 wide. Opisthosoma: 3.0 long, 2.5 wide. Eyes: diameters: 0.10, 0.20, 0.16, 0.22; interdistances: 0.08, 0.02, 0.24, 0.22, 0.22, 0.20. Legs: I: 24.4 (6.2, 1.7, 7.1, 6.9, 2.5); II: 27.2 (6.8, 1.8, 8.0, 7.8, 2.8); III: 17.2 (4.8, 1.3, 4.8, 4.7, 1.6); IV: 19.5 (5.0, 1.4, 5.0, 6.0, 2.1). Palp: vRTA triangular; dRTA distally bifid, with one branch conical and the other slightly laminar and distally blunt; DTA subdistally curved retrolaterally; conductor hyaline, with the same width throughout its entire length; embolus strongly curved prolaterally, with basal projection with pointed tip (Figs 1−3, 10−12, 57, 67).

Female (IBSP 165059): Coloration pattern as in male; prosoma, chelicerae, legs and palps lighter; opisthosoma darker, pale brownish-gray. Total length 7.6. Prosoma: 3.5 long, 3.4 wide. Opisthosoma: 3.9 long, 3.5 wide. Eyes: 0.18, 0.22, 0.18, 0.24; interdistances: 0.14, 0.06, 0.30, 0.28, 0.26, 0.24. Legs: I: 18.3 (5.0, 1.7, 5.5, 4.4, 1.7); II: 20.2 (5.9, 1.8, 6.0, 4.8, 1.7); III: 14.4 (4.4, 1.3, 3.8, 3.7, 1.2); IV: 15.8 (4.6, 1.2, 4.0, 4.3, 1.7). Epigyne: epigynal field wider than long; MS longer than wide (Figs. 4, 13). Vulva: internal ducts running postero-mediad from CO, then posteriad towards SP; SP roughly ovoid; FD short, anteriad (Figs 5, 14).

Variation. Males (n = 3): total length 5.9−6.4; prosoma 2.9−3.0; femur I 6.2−6.8. Females (n = 2): total length 6.6−7.6; prosoma 3.0−3.5; femur I 4.9−5.0.

Distribution. Only known from the type locality in northeastern Peru (Fig. 81).