Actinopus caxiuana, Miglio, Laura Tavares, Pérez-Miles, Fernando & Bonaldo, Alexandre B., 2020

Miglio, Laura Tavares, Pérez-Miles, Fernando & Bonaldo, Alexandre B., 2020, Taxonomic Revision of the Spider Genus Actinopus Perty, 1833 (Araneae, Mygalomorphae, Actinopodidae), Megataxa 2 (1), pp. 1-2 : 108-111

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).