Guadana amendoim sp. n. Figs 15−16, 20−21, 24−25 Type material: Holotype: ♀ from BRAZIL: Acre: Senador Guiomard, Reserva Extrativista de Catuaba [-10.0667, -67.6167], 2002, E. Morato et al. leg. (IBSP 98083). Paratype: 1♀, same data as holotype (IBSP 135243). Etymology. The specific name means peanut in Portuguese and refers to a traditional festival (Festival do Amendoim) from Senador Guiomard, type locality of the species; noun in apposition. Diagnosis. Females of G. amendoim sp. n. resemble those of G. alpahuayo sp. n. and G. manauara by the epigyne with MS bearing pair of epigynal pockets (Figs 4, 15, 77). They are distinguished in having the pockets separated and opening posteriorly (Figs 15, 24) (medially connected and opening anteriorly in the latter species). Males are unknown. Description. Female (holotype): Prosoma pale brownish orange with sub-marginal pale brown stripes and two small irregular pale brown marks at the base of cephalic region; fovea and thoracic striae pale brown; eye borders black. Chelicerae, legs and palps pale orange with small brown spots. Labium brown. Endites pale yellowish-cream, darker at base; sternum pale yellowish-orange with brown margins. Opisthosoma pale gray; dorsally with lighter lateral margins with few whitish guanine spots and two pairs of rounded brown muscle impressions; ventrally with scattered whitish guanine spots and pair of curved lines of muscle impressions; spinnerets pale yellowish orange (Figs 20−21). Total length 7.5. Prosoma: 3.1 long, 3.2 wide. Opisthosoma: 4.2 long, 3.5 wide. Eyes: diameters: 0.17, 0.20, 0.15, 0.22; interdistances: 0.13, 0.06, 0.31, 0.26, 0.27, 0.24. Legs (2143): I: 13.9 (4.0, 1.4, 4.0, 3.3, 1.2); II: 15.6 (4.6, 1.5, 4.5, 3.7, 1.3); III: 11.9 (3.7, 1.2, 3.1, 2.9, 1.0); IV: 12.6 (3.7, 1.0, 3.3, 3.4, 1.2). Epigyne: epigynal field slightly wider than long with lateral muscle attachment bands; MS squared, slightly longer than wide; paired epigynal pockets two times wider than long (Figs 15, 24). Vulva: internal ducts running anteriad from CO then posteriad to SP; SP oval; FD antero-laterad (mating plugs blocking CO)(Figs 16, 25). Male. Unknown. Variation. Females (n = 2): total length 7.5−8.2; prosoma length 3.0−3.1. Distribution. Only known from the type locality in northwestern Brazil (Fig. 81).

Published as part of Rheims, Cristina A., 2021, The Neotropical genera Guadana Rheims, 2010 and Sparianthina Banks, 1929 (Araneae: Sparassidae: Heteropodinae), pp. 401-431 in Zootaxa 5061 (3) on page 407, DOI: 10.11646/zootaxa.5061.3.1, http://zenodo.org/record/5649711