Actinopus caxiuana sp. nov. Figs 98–100, Map 5 Type material. Holotype male from 07º 08.149’ S 55º 24.818’W, Aeroporto, 250m, CastelodosSonhos, Altamira, Pará, Brasil, 24.xi.2005, C. O. Araújo leg. (MPEG 2538). Paratypes: BRAZIL. Pará: Portel, FLONA de Caxiuan „, ECFPn, Parcela do projeto ESECAFLOR, 01º 42’ 30” S 51º 31’ 45” W, 1♂, 15–30.i.2012, D.A. Cunha leg. (MPEG 22278); Plote PPBio Caxiuan „, [01º 57’ 36.7920” S 51º 36’ 55.0800” W], 1♂, 30.i–13.ii.2007, M. A. Ribeiro-Junior & D. L. Arco Verde leg. (UFMG, UFMT, MNRJ); 3♂, 30.i–13.ii.2007, M. A. Ribeiro-Junior & D. L. Arco Verde leg. (CHNUFPI, MPEG 22266, MZSP); 4♂, 30.i– 13.ii.2007, M. A. Ribeiro-Junior & D. L. Arco Verde leg. (MPEG 22260); 5♂, 30.i–13.ii.2007, M. A. Ribeiro-Junior & D. L. Arco Verde leg. (MPEG 22261, 22262, 22267); 6♂, 30.i–13.ii.2007, M. A. Ribeiro-Junior & D. L. Arco Verde leg. (MPEG 22256, 22257, 22263, 22265); 7♂, 30.i–13.ii.2007, M. A. Ribeiro-Junior & D. L. Arco Verde leg. (MPEG 22258, 22259, 22264); Jacareacanga, Km 350 da Transamazônica, 05° 54’ 01.296” S 57° 41’ 45.5994” W, 1♂, 2010, N. F. Lo-Man-Hung leg. (MPEG 22270); Altamira, Castelo dos Sonhos, 07º 08.149’ S 55º 24.818’ W, 4♂, 16.xi.2005, C. O. Araújo leg. (MPEG 2537, 1 ♂ removed for SEM); 08° 13.054’ S 55° 00.956’ W, 3♂, 13.xi.2005, C. O. Araújo leg. (MPEG 22268, 1 ♂ removed for SEM); 08° 18’ S 55° 05’ W, 1♂, 11.xi.2005, C. O. Araújo leg. (MCTP); 08° 20.061’ S 55° 12.875’ W, 1♂, 12.xi.2005, C. O. Araújo leg. (MPEG 22269); 3♂, 16.xi.2005, C. O. Araújo leg. (MPEG 2536); 3♂ 1J, 13.xi.2005, C. O. Araújo leg. (MPEG 5526). Tocantins: Divisa Lajeado / Palmas, Serra do Lajeado, [10º 15’ 23” S 48º 05’ 05” W], 1♂, 25.xi.2002, J. Nunes leg. (IBSP 110416); Palmas, Taquarussu, [10º 19’ 19” S 48º 10’ 10” W], 1♂, 20.xii.2002, J. Nunes leg. (IBSP 110413, 110414). Etymology. The specific name refers to Floresta Nacional de Caxiuan„, Portel, Pará, Brazil (Map 5). Diagnosis. Males of A. caxiuana resemble those of A. vilhena (Fig. 73 A), A. itapitocai (Fig. 79 A), A. itaqui (Fig. 89 A) and A. nattereri (Figs 63 A, 67 E) by the bluishgray coloration on dorsal surface of abdomen (Fig. 98 A); they resemble A. nattereri, A. ipioca and A. itaqui by the palpal tibia being paler than other articles; they resemble those of A. ipioca (Fig. 88 A–C), A. rufipes (Fig. 72 A–C), A. itaqui (Fig. 37 A–C) and A. mesa (Fig. 97 A–C) by BTA placed medially on prolateral tegular surface (Fig. 100 A) and differ from those of other species in the group nattereri, except A. itaqui, by PS in a horizontal line along the prolateral tegular surface, with a larger keel surface. They differ from those of A. itaqui by a larger spacing between PS–PI and PI being less developed and longer than PS in dorsal view (Fig. 100 A–C). MALE (MPEG 2538): Total length 15; Carapace, long 7.62; wide 6.87. Carapace rounded. Anterior eye row slightly procurved, posterior row recurved (Fig. 98 B). With few and weak short bristles between AMEclypeus, between ALE–ALP, between posterior eyesfovea and lateral eyes-edge of carapace. Sternum with 10 sigilla fused medially, two anterior and two posterior sigilla more fused than others (Fig. 98 C). Rastellum protuberant, inverted V-shaped, hirsute, without spines apically (Fig. 98 E, F). Chelicerae with seven denticles along prolateral row of teeth. Prolateral row with seven megateeth. Retrolateral row with six megateeth and one denticle between two basal megateeth (Fig. 98 D). Patella and tibia III with distal crown of well-developed thorns, on patella III interrupted in middle and on tibia III not interrupted in middle (Fig. 99 A, B). Patellae III and IV with spines on prolaterodorsal face (Fig. 99 A, C). Tibia IV without spines on dorsal surface (Fig. 99 D). Ventral pseudoscopulae occupying 50% of tarsus I, 70% of II and 100% of III and IV. Pseudoscopula of tarsi I and II with setae spaced, forming diffuse group of bristles; on tarsi III and IV, compact. Carapace, chelicerae, sternum, coxae, trochantera, femora, patellae, tibiae, metatarsi and tarsi reddish brown; abdomen bluish-dark-gray (Fig. 98 A). Eyes: Diameters: PME 0.28, PLE 0.4, ALE 0.52, AME 0.48; MOQ: Length 1.32, front width 3.16, back width 2.8; Interdistances: PME–PME 1.64, PLE–PME 0.2, AME–AME 0.2, ALE–AME 0.68, ALE–PLE 0.6, AME–PME 0.48. Ocular area: OAL 4.62, OAW 3.75, and IF 2.12. Body: Clypeus: 0.25; Fovea: 1.62; Labium: long 1.12; wide 1.75; Chelicerae: long 2.75; wide 2; Sternum: long 4.75; wide 3.75. Abdomen: long 6.62; wide 5.37. Leg measurements: I: Fe 7.5/ Pa 3.12/ Ti 4.62/ Me 4.87/ Ta 3.37/ total 23.5. II: 7/ 3.25/ 4.62/ 5.12/ 3.5/ 23.5. III: 6/ 3.62/ 3.87/ 6.25/ 3.87/ 23.62. IV: 8.37/ 3.75/ 6.25/ 7.12/ 4.25/ 29.75. Formula 4123. Spination: I—Fe v0, d0, p0, r0; Pa v0, d0, p0, r0; ti v0, d0, p0, r0; Me v4-4-2, d0, p0-0- 1, r0-0-6; ta v0, d0, p0-1-2, r1-7-5. II—Fe v0, d0, p0, r0; Pa v0, d0, p0, r0; ti v0, d0, p0, r0; Me v4-2-3, d0, p0-0-2, r1-2-5; ta v0, d0, p1-2-5, r2-6-5. III—Fe v0, d0, p0, r0; Pa v0, d5-5-21, p0, r0-0-2; ti v0, d1-0-12, p0-0-2, r0; Me v4- 2-5, d0, p0-1-2, r0-1-2; ta v0, d0, p0-3-4, r0-5-4; IV—Fe v0, d0, p0, r0; Pa v0, d16-10-5, p0-0-1, r0; ti v0, d0, p0, r0; Me v2-2-3, d0, p0-2-4, r0-0-1; ta v0, d0, p0-6-7, r0- 3-6. Palp: PA well-developed and bordered, continuous to PAc. Embolus with three keels (PAc, PI and PS). BTA developed, placed medially on prolateral tegular surface; serrated area small, represented by two cusps; embolar bases thin and elongated (Fig. 100 A–C). Distribution: BRAZIL. Pará: Altamira, Portel, and Jacareacanga. Tocantins: Divisa Lajeado/Palmas, and Palmas (Map 5).

Published as part of Miglio, Laura Tavares, Pérez-Miles, Fernando & Bonaldo, Alexandre B., 2020, Taxonomic Revision of the Spider Genus Actinopus Perty, 1833 (Araneae, Mygalomorphae, Actinopodidae), pp. 1-256 in Megataxa 2 (1) on pages 108-111, DOI: 10.11646/megataxa.2.1.1, http://zenodo.org/record/5597237