Actinopus pusillus Mello-Leitão, 1920, Mello-Leitao, 1920

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: 130-133

publication ID 10.11646/megataxa.2.1.1

publication LSID


persistent identifier

treatment provided by


scientific name

Actinopus pusillus Mello-Leitão, 1920


Actinopus pusillus Mello-Leitão, 1920  

Figs 116–118 View FIGURE 116 View FIGURE 117 View FIGURE 118 , Map 6 View MAP 6

Actinopus pusillus Mello-Leitão, 1920: 59   (holotype ♁, Franca, São Paulo, Brasil, MZSP, not located); World Spider Catalog, 2020.

Note. The material examined was attributed to A. pusillus   by the following characters coincident with the original description: unique pattern formed by the crowns of spines in dorsal surface of the patellae III and IV; coloration of cephalothorax and chelicerae, total length average, rastellum with few short spines, and the size of ventral scopulae in tarsi and metatarsi. The records are also coincident with the type locality   .

Diagnosis. Males of A. pusillus   resemble A. emas   ( Fig. 121 View FIGURE 121 A–C), A. bocaina   ( Fig. 124 View FIGURE 124 A–C) and A. paranensis   ( Fig. 115 View FIGURE 115 A–C) by PA continuous to PAc. They resemble those of all species of the group crassipes   , except A. laventana   ( Fig. 129 View FIGURE 129 A–C) and A. paranensis   , by BTA placed medially on prolateral tegular surface. They resemble those of all species of the group crassipes   , except A. crassipes   ( Fig. 107 View FIGURE 107 A–C), by the serrated area distal to PAc and continuous to proximal area of PAc ( Fig. 118 View FIGURE 118 A–C). They resemble those of A. dubiomaculatus   and A. paranensis   by tibia, tarsi and metatarsi paler than other articles. They resemble those of A. bocaina   , A. laventana   and A. paranensis   by palpal tibia paler than other articles. They differ from those of all other species of the group by the ventral scopulas occupying 25% of the distal portion of tarsi II and metatarsi IV, with diffuse setae; Chelicerae with only three or four prolateral denticles along subunguial sulci, ( Fig. 116 D View FIGURE 116 ); PS and PI length on dorsal view reaching nearly 25% of the embolus length ( Fig. 118 View FIGURE 118 A–C).

MALE (IBSP 113194): Total length 7.19; Carapace, long 2.88; wide 2.95. Carapace anterior part rounded. Anterior eye row slightly procurved, posterior row recurved ( Fig. 116 B View FIGURE 116 ). With few bristles between AME-clypeus, between lateral eyes-edge of carapace and forming recurved rows in interdistances PME–PME and PLE–PLE. Sternum with eight sigilla fused medially, two distal sigilla more fused to each other than others ( Fig. 116 C View FIGURE 116 ). Rastellum protuberant and digitiform, with row with six or seven spines apically ( Fig. 116 View FIGURE 116 E–F). Chelicerae with subequal teeth in prolateral and retrolateral rows, and denticles widespread along prolateral row of teeth, with a low number of denticles ( Fig. 116 D View FIGURE 116 ). Patella and tibia III with distal crown of well developed thorns, not interrupted in middle ( Fig. 117 View FIGURE 117 A–B). Patella III with spines along dorsal surface and patella IV with spines on prolaterodorsal surface ( Fig. 117 A, C View FIGURE 117 ). Tibia III with one or two dorsal spines ( Fig. 117 B View FIGURE 117 ). Ventral scopulae occupying 75% of tarsi I and 100% of II, III and IV. Scopula of tarsi I and II occupying 30% and 3% of tarsi, with setae spaced, forming diffuse group of bristles; on tarsi III and IV, compact. Carapace and chelicerae pale brown; sternum yellowish brown; coxae, trochantera, femora and patellae pale brown; tibiae, metatarsi and tarsi pale orange; tibia of palp pale than other articles; abdomen dark-gray, with bluish dorsal spot ( Fig. 116 B View FIGURE 116 ). Eyes: Diameters: PME 0.11, PLE 0.15, ALE 0.2, AME 0.12; MOQ: Length 0.59, front width 0.47, back width 1.02; Interdistances: PME–PME 0.77, PLE–PME 0.07, AME–AME 0.23, ALE–AME 0.36, ALE–PLE 0.32, AME–PME 0.28. Ocular area: OAL 2.36, OAW 1.78, and IF 1.14. Body: Clypeus: 0.07; Fovea: 1.06; Labium: long 0.85; wide 0.59; Chelicerae: long 1.96; wide 0.88; Sternum: long 2.3; wide 1.79. Abdomen: long 3.89; wide 3.02. Leg measurements: I: Fe 3.34/ Pa 1.33/ Ti 2/ Me 2.32/ Ta 1.71/ total 10.7. II: 3.16/ 1.33 / 1.94/ 2.51/ 1.69/ 10.63. III: 2.57/ 1.39/ 1.49/ 2.55/ 1.72/ 9.72. IV: 3.54/ 1.52/ 2.81/ 2.89/ 1.88/ 12.64. Formula 4123. Spination: I—Fe v0, d0, p0, r0; Pa v0, d0, p0, r0; ti v1-4-4, d0, p0, r0; Me v4-5-4, d0, p0-1-0, r1-3-4; ta v0-3-5, d0, p1-2-2, r2-3-3. II—Fe v0, d0, p0, r0; Pa v0, d0, p0, r0; ti v2-3-4, d0, p0, r1-6-14; Me v3-3-4, d0, p1-1-2, r1-3-5; ta v0-1-1, d0, p2-1-2, r1-3-7. III—Fe v0, d0, p0, r0; Pa v0-0-1, dx, p1-0-4, r0-0-1; ti v0-0-2, dx, p0-0-3, r0-0-4; Me v0-2-4, dx, p1-0-2, r0-1-5; ta v0, dx, p0-1-4, r0-0-3; IV—Fe v0, dx, p0, r0; Pa v0, d5-6-27, p3-2-1, r0; ti v3-2-4, d1-0-12, p0-1-0, r0; Me v3-3-2, d0-1-0, p0-2-4, r0-0-1; ta v0, d0, p1-2-5, r0-2-3. Palp: BTA developed, placed medially on prolateral tegular surface, embolus with three keels (PAc, PS and PI) notable on prolateral and dorsal views. PS more developed than PI; PAc evident on prolateral and dorsal views. Serrated area in a row, continuous to PAc, toward base of embolus. Tegulum developed, PA pronounced, continuous to PAc ( Fig. 118 View FIGURE 118 A–C).


MALES (n=3): Eyes: Diameters: PME 0.1–0.18, PLE 0.13–0.21, ALE 0.2–0.24, AME 0.12–0.15; MOQ: Length 0.59–0.68, front width 0.47–0.56, back width 1.02– 1.37; Interdistances: PME–PME 0.77–1.26, PLE–PLE 0.06–0.12, AME–AME 0.2–0.26, ALE–ALE 0.36–0.52, ALE–PLE 0.32–0.38, AME–PME 0.28–0.4. Ocular area: OAL 2.36–3.02, OAW 1.78–302 and IF 1.14–1.32. Body: Total length: 7.19–8.23; Carapace: Length 2.88–4.13; wide 2.95–4.23; Clypeus: 0.07–0.13; Fovea: 0.98–1.43; Labium: Length 0.85–0.98; wide 0.59–0.74; Chelicerae: Length 1.85–2.31; wide 0.88–1.08; Sternum: Length 2.3–2.98; wide 1.79–2.45. Abdomen: Length 3.72–3.98; wide 2.74– 3.06. Legs: I: Fe 3.34–4.45/ Pa 1.25–1.73/ Ti 2–3.06/ Me 2.32–3.37/ Ta 1.71–2.21/ total 10.7–14.34. II: 3.16–4.39/ 1.33–1.76/ 1.94–2.75/ 2.51–3.41/ 1.69–2.23/ 10.63–13.93. III: 2.57–3.49/ 1.39–1.87/ 1.49–2.22/ 2.55–3.9/ 1.72– 2.27/ 9.72–13.52. IV: 3.54–4.51/ 1.52–2.07/ 2.81–3.76/ 2.89–3.83/ 1.88–2.42/ 12.64–16.5. Tibiae, metatarsi and tarsi may or may not be pale than the rest of leg articles. Rastellum without spines in some specimens.

Distribution. BRAZIL. Minas Gerais: Jaboticatubas; S„o Paulo: Itirapina ( Map 6 View MAP 6 ).

Examined material. BRAZIL: Minas Gerais: Jaboticatubas, Santana do Riacho, Morro do Pilar e Itambé do Mato Dentro, Parque Nacional da Serra do Cipó , 19º15’S 43º31’O, 1♁, 07–14.i.2002, Equipe Biota leg. ( IBSP 113194 View Materials ) GoogleMaps   ; S„o Paulo: Itirapina, Estaç„o Ecológica de Itirapina , 22º15’S 47º49’O, 1♁, C. Bertim leg. ( IBSP 114452 View Materials ) GoogleMaps   ; 14–21.v.2001, C. Bertim et al. leg. ( IBSP 114460 View Materials )   .














Actinopus pusillus Mello-Leitão, 1920

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

Actinopus pusillus Mello-Leitão, 1920: 59

Mello-Leitao 1920: 59