Actinopus cordobensis, Ríos-Tamayo & Goloboff, 2018

Ríos-Tamayo, D. & Goloboff, P. A., 2018, Taxonomic Revision And Morphology Of The Trapdoor Spider Genus Actinopus (Mygalomorphae: Actinopodidae) In Argentina, Bulletin of the American Museum of Natural History 2018 (419), pp. 1-84 : 35-36

Actinopus cordobensis , sp. nov.

Figures 15A–G, 45

TYPE MATERIAL: HOLOTYPE ♂ (MACN-Ar 36613): Córdoba: Campo Experimental INTA de Marcos Juárez [32°42′ S 62°6′ W], Feb.-Mar. 2011, no collector data, 1♂. PARATYPE: 1♂ (MACN-Ar 36614), Calamuchita [32°16′ S 64°37′ W], Jan. 1955, Viana.

ETYMOLOGY: The specific epithet refers to the province where the species is widely distributed.

DIAGNOSIS: A. cordobensis can be distinguished by an embolus without MRk and Ak not extending to the apex (fig. 15D–F), similar to A. coylei , A. casuhati , A. szumikae , and A. ariasi ; and different from the rest. It differs from the most similar species, A. ariasi , by the narrow ATA, and from A. coylei and A. szumikae by legs with metararsi-tarsi lighter. Cheliceral prolongation without cusps, different from A. insignis , A. gerschiapelliarum , A. taragui , A. puelche , and A. palmar .

Female: Unknown.

DESCRIPTION: Holotype male (MACN-Ar 36613, fig. 15A–G): Total length: 8.28. Carapace (fig. 15A): length 3.30, width 3.12. Cephalic region: length 1.92, width 2.46; small clypeus, 15 small bristles, 10 between PME and 3–4 bristles behind each PME-PLE, 5 bristles on both sides of the OQ and a central larger one. Fovea: length 0.48, width 1.02. Eyes, diameters and interdistances: AME 0.16 (small), ALE 0.28, PME 0.12, PLE 0.20; OQ length 0.72, anterior width 1.80, 1.60 posterior width; AME-ALE 0.44, PME-PLE 0.00, AME-PME 0.32, ALE-PLE 0.40, AME- AME 0.20. Chelicerae: Length 1.62, width 0.84; cheliceral apex with 10 recumbent and elongated bristles that cover the base of the fang. Chelicerae prolongation without cusps; furrow with 5 large promarginal teeth and 5 retromarginal (a small one between 3d-4th and 4th-5th) and 7 denticles, near the promarginal teeth. Labium: length 0.80, width 0.72. Maxillae: anterior length 0.78, posterior length 1.32, width 1.00. Sternum (fig. 15G): Center flat; length 2.52, maximum width 2.20, minimum width 0.72. Postlabial sigillum shallow, sigilla I–II well defined. Abdomen: Length 1.74, covered with black bristles on the dorsum. PMS: length 0.40; PLS: length of basal:medial:apical segments 0.52:0.20:0.08. Spigots: 1 large, 18 small on PMS; PLS, numbers of large(small) spigots on basal:medial:apical article 1(19:2(25):2(38). Lengths of legs and palp: I: 3.18, 1.38, 2.04, 2.70, 1.68, 10.98. II: 3.30, 1.38, 2.10, 2.58, 1.68, 11.04. III: 2.70, 1.44, 1.62, 2.70, 1.80, 10.26. IV: 3.60, 2.16, 2.88, 3.30, 1.98, 13.92. Palp: 3.30, 1.62, 3.00, –, 0.90, 8.82.

Chaetotaxy: Femora: 0. Patellae: I-II, 0; III; 21 P SUP-D ANT, 1 P A +8 on the margin, 1-1-1-1 D, 5 R A +9 on the margin; IV, 41 P SUP-D ANT. Tibiae: I; 1-0-3 V; II, 1-0-1-1-1-3 R INF, 1-1-2 V; III, 1-2 P (1:3 A), 1 D B, 1-1 R (1:3 A), 1-2-2 V, with an apical crown of 17 thorns; IV, 2-1 P (1:2 A), 1-2-2-1-4 V. Metatarsi: I, 1-1-2-2- 1-1 R INF, 2-1-2-2-V; II, 1-1-1-1-2-2-1-2-4 R INF-V POST, 1-1-1-2 V ANT; III, 1-1-1-1 P INF, 1 D ANT B, 1-1-2-2-3 D POST-R, 1-3-2-2- 2-4 V; IV, 1-2 P (1:2 A), 1-1-2-1-1-2-3-1-5 V. Tarsi: I, 1-1-1-1-1 P INF, 1-1-1-2-1-2-1-2-2 R INF, 1-1-1 V (1:2 A); II, 1-1-1-1-2 P INF, 1-1-2- 1-3-7 R INF, 1-1-1 V (1:2 A); III, 2-2-1-1-1-3-3 P INF, 2-4-7-2-2 R INF, 1-2 V A; IV, 1-1-1-1-4- 4-8 P INF, 1-1-2-1-2-2-3-2 R INF. Total number of retrolateral spines on tibiae I and II (fig. 15B): 0 and 7 respectively. Palp: Tibia short and thickened (width/length: 0.37±0.003) (fig. 15C). Bulb (fig. 15D–F), ATA and BTA developed; embolus slender with a series of denticles at the base, Ak not extending to the apex; MRk small. Pseudo- scopula: Tarsus: sparse, I (1:3 A); II (1:2 A); III- IV, dense (uniformly distributed throughout the segment). Metatarsus: without pseudoscopula. Trichobothria: Tibiae: I 4-6; II 3-6; III 4-6; IV 4-7. Metatarsi: I 12; II-III 11; IV 6. Tarsi: I-II 9; III 10; IV 6. Color: Carapace dark reddish brown, cephalic region and chelicerae darker. Abdomen dark brown, booklungs with dark markings. Spinnerets yellowish. Sternum, labium, and maxillae lighter. Legs like carapace with tarsi-metatarsi lighter.

DISTRIBUTION: Provinces of San Luis, and central and southern Córdoba.

OTHER MATERIAL EXAMINED: Córdoba: Leones [32°39′ S 62°17′ W], 2 Jan. 1966, H.P. William, 1♂ (MACN-Ar 36615). 10 Feb. 1946, no collector, 1♂ (MACN-Ar 36616). Calamuchita (B, C, D, E) [32°16′ S 64°37′ W], Jan. 1955, Viana, 4♀ (each in different vial) (MACN- Ar 36617–36620 respectively). San Pellegrino, Sierra de Córdoba [30°47′ S 64°17′ W], Jan. 1942, Bridarolli, 1♂ (MACN-Ar 36621). San Luis: La Florida [33°7′ S 66°0′ W], 1 Feb. 1992, S. Tripole, 1♂ (CA 0162). 6 Feb. 1993, Ricaldone, 1♂ (CA 0228). Trapiche [33°6′ S 66°3′ W], 2 Feb. 1992, Pérez Chaca, 1♂ (CA 0163). San Francisco del Monte de Oro [32°36′ S 66°7′ W], 20 Mar. 2006, Albornoz, 1♂ (CA 0982).