Actinopus mesa, 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. 1-256 : 105-108

publication ID	https://doi.org/ 10.11646/megataxa.2.1.1
DOI	https://doi.org/10.5281/zenodo.5655603
persistent identifier	https://treatment.plazi.org/id/0975136A-FFE5-CE36-FCD5-F8E4DA843AE8
treatment provided by	Plazi
scientific name	Actinopus mesa
status	sp. nov.

Treatment

Actinopus mesa View in CoL sp. nov.

Figs 95–97 View FIGURE 95 View FIGURE 96 View FIGURE 97 , Map 5 View MAP 5

Type material. Holotype male from [48° 17’ 23” S 14° 05’ 42” W], Usina Hidroelétrica Serra da Mesa, Minaçu, Goiás, Brazil , 18–30.xi.1996, A. B. Bonaldo & L. Moura leg. ( MCN 28054) GoogleMaps . Paratype: BRAZIL. Mato Grosso: Santa Isabel , [56° 08’ S 15° 36’ W], 1♂, 8.i.1961, B. Malkin leg. ( AMNH) GoogleMaps .

Etymology. The specific name is a noun in apposition from the type locality name, Serra da Mesa.

Diagnosis. Males of A. mesa resemble those of A. ipioca ( Fig. 88 View FIGURE 88 A–C), A. itaqui ( Fig. 91 View FIGURE 91 A–C), A. rufipes ( Fig. 72 View FIGURE 72 A–C) and A. caxiuana ( Fig. 100 View FIGURE 100 A–C) by the BTA placed medially on prolateral tegular surface ( Fig. 97 A View FIGURE 97 ); they resemble those of A. nattereri ( Fig. 67 View FIGURE 67 A–C), A. vilhena ( Fig. 75 View FIGURE 75 A–C), A. harveyi ( Fig. 78 View FIGURE 78 A–C) and A. caxiuana by the absence of an embolar serrated area. They resemble those of A. nattereri , A. rufipes , A. itaqui , A. utinga ( Fig. 103 View FIGURE 103 A–C) and A. caxiuana by the welldeveloped and bordered PA and differ from those of all other species of the group nattereri by PA placed in a triangular area and by the hirsute legs and body.

MALE (MCN 28054): Total length 10.87; Carapace, long 5.00; wide 5.00. Carapace anterior part tapering. Anterioreyerowslightlyprocurved,posteriorrowrecurved ( Fig. 95 B View FIGURE 95 ). Without bristles between AME-clypeus. With one long bristle between ALE–ALP and many short and weak bristles between posterior eyes-fovea and lateral eyes-edge of carapace. Sternum with eight sigilla fused medially, two distal sigilla more fused than others ( Fig. 95 C View FIGURE 95 ). Rastellum protuberant, inverted V-shaped, hirsute, without spines apically ( Fig. 95 E, F View FIGURE 95 ). Chelicerae with six denticles along prolateral row of teeth. Prolateral row with six megateeth. Retrolateral row with seven megateeth ( Fig. 95 D View FIGURE 95 ). Patella and tibia III with distal crown of welldeveloped thorns, on patella III interrupted in middle and on tibia III not interrupted in middle ( Fig. 96 A, B View FIGURE 96 ). Patellae III and IV with spines on prolaterodorsal face ( Fig. 96 A, C View FIGURE 96 ). Tibia IV without spines on dorsal surface ( Fig. 96 D View FIGURE 96 ). Ventral pseudoscopulae occupying 40% of tarsus I, 60% 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 pale brown with small bluish spot on anterior dorsal surface ( Fig. 95 A View FIGURE 95 ). Eyes: Diameters: PME 0.2, PLE 0.24, ALE 0.24, AME 0.28; MOQ: Length 0.84, front width 2.24, back width 2; Interdistances: PME–PME 1.36, PLE–PME 0.08, AME–AME 0.24, ALE–AME 0.6, ALE–PLE 0.44, AME–PME 0.36. Ocular area: OAL 3.62, OAW 2.75, and IF 1.75. Body: Clypeus: 0.25; Fovea: 2.12; Labium: long 1; wide 0.75; Chelicerae: long 2.87; wide 1.5; Sternum: long 3.25; wide 2.75. Abdomen: long 5.5; wide 4.25; 6.25. Leg measurements: I: Fe 5/ Pa 2/ Ti 3.12/ Me 3.87/ Ta 2.37/ total 16.37. II: 5/ 2/ 3.12/ 4/ 2.5/ 16.62. III: 4/ 2.12/ 2.12/ 4.25/ 2.75/ 15.25. IV: 3.87/ 2.25/ 3.75/ 4.75/ 2.62/ 17.25. Formula 4123. Spination: I—Fe v0, d0, p0, r0; Pa v0, d0, p0, r0; ti v0-1-7, d0, p0, r0; Me v3-3-2, d0, p0-0-1, r1-2-2; ta v1-1-2, d0, p0, r0-1-2. II—Fe v0, d0, p0, r0; Pa v0, d0, p0, r0; ti v0-0-3, d0, p0, r0; Me v4-5-7, d0, p0-0-1, r0-3-4; ta v1-6-1, d0, p0-3-2, r0-2-2. III—Fe v0, d0, p0, r0; Pa v0, d1-4-13, p0-0-2, r0- 0-2; ti v0-0-2, d1-0-8, p0-0-2, r0-0-3; Me v0-0-2, d1-2-1, p1-1-2, r0-0-3; ta v0, d0, p1-1-1, r0-0-1; IV—Fe v0, d0, p0, r0; Pa v0, d14-5-4, p1-2-1, r0; ti v0-0-1, d0, p0, r0; Me v1-1-3, d0, p0-0-6, r0-0-1; ta v0, d0, p0-4-1, r0. Palp: PA well-developed, continuous to PAc. Embolus with three keels (PAc, PI and PS). BTA developed, placed medially on prolateral tegular surface; serrated area absent; embolar bases thin, elongated. PA placed in triangular area ( Fig. 97 View FIGURE 97 A–C).