Actinopus obidos, sp. nov.
Creators: name: Miglio, Laura Tavares
name: Pérez-Miles, Fernando
name: Bonaldo, Alexandre B.
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Actinopodidae
Actinopus
Actinopus obidos

description: Actinopus obidos sp. nov.
Figs 22–24, Map 3
Type material. Holotype male from 00° 37.331’ S 55° 43.529’ W, Estaç „o Ecológica do Gr„o Pará (Centro), 900m da trilha 3 (ponto 12), Óbidos, Pará, Brazil, 10– 31.i.2009, M. S. Hoogmoed, T. C. S. Ávila-Pires & P.L. V. Peloso leg. (MPEG 22274). Paratypes: BRAZIL: Pará: Óbidos, 900m da trilha 3 (ponto 12), Estaç „o Ecológica do Grão Pará (Centro), 00° 37.331’ S 55° 43.529’ W, 4♂, 10–31.i.2009, M. S. Hoogmoed, T. C. S. Ávila-Pires & P.L. V. Peloso leg. (MPEG 22272, one removed for MEV); 1♂ (IBSP); 1♂ (CAD); Almeirim, Reserva Biológica do Maicuru, Área do Acampamento, 00° 49.718’ S 53° 55.882’ W, 1♀, 19.x–5.xi.2009, M. S. Hoogmoed, T. C. S. Ávila-Pires & W. Rocha leg. (MPEG 22273).
Etymology. The specific name is a noun in apposition derived from the type locality name.
Diagnosis. Males of Actinopus obidos differ from those of almost all other species of the genus by the absence of PAc and from those of A. fractus (Fig. 21 A–C) by the undeveloped PA and by the position of BTA, placed medially on the tegular prolateral surface, and from A. buritiensis (Fig. 29 A–C) by the wider tegulum, with less conspicuous BTA (Fig. 26 A–C). Females differ from all others species by the single spermathecae, strongly fused to base, with pore distribution widespread through basal membrane (Fig. 26 D).
MALE (MPEG 22274): Total length 10.62; Carapace, long 4.3; wide 4.5. Carapace anterior part tapering. Anterior eye row slightly procurved, posterior row recurved (Fig. 22 B). Without bristles between AMEclypeus. One short and weak bristle between ALE–PLE and 16 short and weak bristles between posterior eyesfovea. Sternum with eight sigilla fused medially and strongly demarcated, two distal sigilla more fused than others (Fig. 22 C). Rastellum protuberant, inverted V-shaped, hirsute, without spines apically (Fig. 22 E–F). Chelicerae with four denticles along prolateral row of teeth. Prolateral row with six megateeth and one denticle between two basal megateeth. Retrolateral row with five megateeth and one denticle between two basal megateeth (Fig. 22 C). Patella and tibia III with distal crown of well-developed thorns, not interrupted in middle (Fig. 23 A–B). Patellae III and IV with spines on prolaterodorsal face (Fig. 23 A, C). Tibia IV without spines on prolateral surface and with trichobothria in two irregular visible rows (Fig. 23 D). Ventral pseudoscopulae occupying 30% of tarsi I, 50% 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 and chelicerae reddish brown; sternum, coxae, trochantera, femora, patellae,tibiae, metatarsi and tarsi yellowish brown; tibia of palp and cymbium pale yellow than others articles and abdomen pale gray (Fig. 22 A). Eyes: Diameters: PME 0.3, PLE 0.325, ALE 0.35, AME 0.35; MOQ: Length 1, front width 2.25, back width 2.075; Interdistances: PME–PME 1.125, PLE–PME 0.075, AME–AME 0.2, ALE–AME 0.375, ALE–PLE 0.375, AME–PME 0.325. Ocular area: OAL 3.32, OAW 2.4, and IF 2.8. Body: Clypeus: 0.2; Fovea: 1.9; Labium: long 1.06; wide 0.93; Chelicerae: long 2.7; wide 1.3; Sternum: long 3.125; wide 2.625. Abdomen: long 5.2; wide 4. Leg measurements: I: Fe 4.75/ Pa 2/ Ti 2.75/ Me 3.875/ Ta 2.12/ total 15.5. II: 4.62/ 2.12/ 2.87/ 3.87/ 2.25/ 15.75. III: 3.5/ 2.12/ 1.75/ 3.75/ 2.12/ 13.25. IV: 5/ 2.25/ 3.75/ 4.25/ 2.5/ 17.75. Formula 4123. Spination: I—Fe v0, d0, p0, r0; Pa v0, d0, p0, r0; ti v1-5-8, d0, p0-0-2, r0; Me v4-6-11, d0, p1-3-3, r0-3-4; ta v3-2-4, d0, p2-3-4, r4-4-6. II—Fe v0, d0, p0, r0; Pa v0, d0, p0, r0; ti v1-3-6, d0, p0, r0-2-3; Me v4-7-11, d0, p1-2-3, r2-3-3; ta v3-2-3, d0, p3- 4-6, r4-8-7. III—Fe v0, d0, p0, r0; Pa v0, d7-9-28, p0-0-4, r0-0-4; ti v0-0-6, d0-1-13, p0-0-3, r0-0-3; Me v1-4-8, d4- 5-5, p1-2-3, r1-3-4; ta v0, d0-0-2, p2-6-7, r0-6-7; IV—Fe v0, d0, p0, r0; Pa v0, d12-10-5, p0-1-1, r0; ti v1-2-6, d0, p0, r0; Me v4-5-7, d0-0-2, p0-1-0, r0; ta v0, d0-0-2, p2- 6-10, r3-3-5. Palp: PA poorly developed, embolus with two keels (PI and PS). Basal surface of tegulum smooth. BTA small in prolateral view and in middle of tegulum width; prolateral tegulum with two denticles next to base of embolus; embolar bases thinner (Fig. 26 A–C).
FEMALE (MPEG 22273): Total length 23.62; Carapace, long 10.75; wide 9.75. Carapace anterior part square and posterior part triangular. Anterior eye row procurved, posterior row slightly recurved. Many short bristles and one long bristle between AME-clypeus, one long bristle between PLE–ALE, short and long bristles between posterior eyes-fovea and short bristles between lateral eyes-edge of carapace (Fig. 24 B). Sternum with eight sigilla fused medially, two distal sigilla more fused than others (Fig. 24 C). Rastellum protuberant, subquadrate, hirsute, with row of short spines in edge of rastellum and many short spines cover dorsal rastellum (Fig. 24 E–F). Chelicerae with denticles along prolateral row of teeth. Prolateral row with four megateeth and four teeth, the first one between two distal teeth and others on basal area. Retrolateral row with six megateeth and three teeth between four basal megateeth (Fig. 24 D). Patella III with distal developed crowns of thorns and tibia III with distal interrupted crown of thorns (Fig. 25 A–B). Patella IV with prolaterodorsal short spines along extension of article (Fig. 25 C). Tibia IV without spines on prolateral surface and with many long bristles on prolateral surface (Fig. 25 D). Carapace, chelicerae, sternum, coxae, trochantera, femora, patellae, tibiae, metatarsi, tarsi and palp reddish brown, and abdomen pale brown with a big portion of unpigmented areas in dorsal view (Fig. 24 A). 22 labial cuspules, 126 on right maxilla and 145 on left. Eyes: Diameters: PME 0.4, PLE 0.45, ALE 0.65, AME 0.3; MOQ: Length 1.8, front width 4.3, back width 4.35; Interdistances: PME–PME 2.65, PLE–PME 0.25, AME–AME 0.5, ALE–AME 1.35, ALE–PLE 1, AME–PME 1.05. Ocular area: OAL 8, OAW 6.7, and IF 3.62; Body: Clypeus: 0.37; Fovea: 4.375; Labium: long 1.62; wide 1.37; Chelicerae: long 4.75; wide 3.62; Sternum: long 7.5; wide 6.12. Abdomen: long 12.5; wide 10.12. Leg measurements: I: Fe 5.37/ Pa 3.75/ Ti 2.37/ Me 3.12/ Ta 1.62/ total 16.25. II: 5.62/ 3.87/ 2.62/ 3.5/ 1.5/ 17.12. III: 5.62/ 4.5/ 2/ 4/ 1.37/ 17.5. IV: 7.625/ 4/ 4/ 4.87/ 1.25/ 21.75. Formula 4123. Spination: I—Fe v0, d0, p0, r0; Pa v0, d0, p0, r0; ti v2-0-1, d0, p0-3-6, r1-14-11; Me v0-0-2, d0, p10-9-9, r9-10-13; ta v0-0-3, d0, p2-3-3, r5-4- 4. II—Fe v0, d0, p0, r0; Pa v0, d0, p0, r0; ti v0, d0, p0-0-1, r12-49-38; Me v0-2-0, d0, p7-12-10, r16-19-15; ta v3-0-3, d0, p6-7-4, r4-5-4. III—Fe v0, d0, p0, r0; Pa v0, d0-0-23, p0-0-3, r0-0-12; ti v0, d1-0-13, p0-0-2, r7-12-19; Me v0- 2-9, d0-2-3, p2-1-0, r9-17-18; ta v15-16-18, d0, p1-3-3, r7-15-9; IV—Fe v0, d0, p0, r0; Pa v0, d15-11-6, p0, r0; ti v0, d0, p0, r0; Me v0-0-3, d0, p0-1-2, r0; ta v8-17-12, d0, p4-11-8, r0-0-3. Spermathecae: Represented by single seminal receptacles strongly fused to base, long as wide, with short duct. Single receptacle with two lobes, right lobe on dorsal view bigger than left lobe. Pore distribution reaching base and along of membrane area (Fig. 26 D).
VARIATION
MALES (n=10): Eyes: Diameters: PME 0.2–0.3, PLE 0.25–0.32, ALE 0.3–0.4, AME 0.25–0.4; MOQ: Length 0.77–1, front width 2.02–2.25, back width 1.8–2.07; Interdistances: PME–PME 1.02 – 1.12, PLE–PME 0,075–0.12, AME–AME 0.1–0.2, ALE–AME 0.32–0.62, ALE–PLE 0.2–0.37, AME–PME 0.27–0.35. Ocular area: OAL 2.96–3.32, OAW 2.2–2.5, and IF 1.12–2.8. Body: Total length: 8–10.62; Carapace: long 3.68–4.5; wide 4–4.5; Clypeus: 0.16–0.2; Fovea: 1.68–1.9; Labium: long 1–1.12; wide 0.84–1; Chelicerae: long 0.96–2.7; wide 0.48–1.37; Sternum: long 2.75–3.62; wide 2.24–2.62. Abdomen: long 1.6–5.5; wide 1.2–4. Leg measurements: I: Fe 3.87–4.75/ Pa 1.75–2/ Ti 2.62–2.75/ Me 2.87–3.87/ Ta 2–2.25/ total 13.75–15.5. II: 3.75–4.62/ 1.75–2.12/ 2.62–2.87/ 3.37–3.87/ 1.5–2.25. III: 3–3.5/ 1.87–2.12/ 1.75–1.87/ 2.87–3.85/ 1.75–2.12/ 11.87–13.25. IV: 4.37– 5/ 2–2.25/ 3.5–3.75/ 3.75–4.25/ 2.12–2.5/ 15.75–17.75.
Distribution. BRAZIL. Pará: Óbidos and Almeirim (Map 3).
description: 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 29-34, DOI: 10.11646/megataxa.2.1.1, http://zenodo.org/record/5597237