Corythalia lineata Bayer

Bayer, Steffen, Höfer, Hubert & Metzner, Heiko, 2020, Revision of the genus Corythalia C. L. Koch, 1850, part 1: Diagnosis and new species from South America (Araneae: Salticidae: Salticinae: Euophryini), Zootaxa 4806 (1), pp. 1-144: 94-95

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Corythalia lineata Bayer

sp. nov.

Corythalia lineata Bayer   , sp. nov.

Figs 45 View FIGURE 45 A–B, 59I, 66J, 70C

Type material. Holotype: ♂, GUYANA: East Berbice-Corentyne: Canje-Ikuruwa River, Forest Savanna , ca. 57°30’W, 05°42’N, about 25 m a.s.l., George Bentley leg. Aug.–Dec. 1961, AMNH-IZC 00327077 - II (ex. AMNH- IZC 00327077). GoogleMaps  

Etymology. The specific name refers to the central light transverse band on the opisthosoma of the male holotype, which is narrow and exactly straight (Latin subject “linea” means “line”; “lineatus” means “drawn after a straight line [or perpendicular]”); adjective.

Diagnosis. Males distinguished from those of all other Corythalia   species by the following characters in combination: embolus (E) (actual tubular section) quite long [longer than width of tegulum (T)], centrally relatively broad (broader than RTA in ventral view), main section retrolaterally with semicircle course and distal third very narrow and with irregularly bifurcated tip having a quite long, light, minimally curved and slender retrolatero-distal extension and a tiny, conical prolateral process ( Figs 45A View FIGURE 45 , 66J View FIGURE 66 ); base of E (EB) in ventral view compressed round and moderately long [shorter than 2/5 the length of entire T (including EB)]; EB circle very broad,> 3/4 the width of T; proximal tegulum lobe covering more than 1/2 but less than 2/3 of palpal tibia ( Figs 45A View FIGURE 45 , 66J View FIGURE 66 ).

Description. Male: total length 6.7, carapace length 3.1, maximal carapace width 2.1, width of eye rectangle

2.0, opisthosoma length 2.9, opisthosoma width 2.0, fovea length 0.24. EYES: AME 0.67, ALE 0.43, PME 0.11, PLE 0.37, AME–AME 0.04, AME–ALE 0.07, PME–PME 1.75, PME–PLE 0.26, ALE–PLE 0.79, PLE–PLE 1.41, clypeus height at AME 0.39, clypeus height at ALE 0.81. Cheliceral furrow with 2 promarginal (including one additional, even smaller tooth then regular promarginal tooth, both directly in contact with each other) and 1 retromarginal teeth. SPINATION: palp without spines. Legs: femur I 1500, II 1600, III 1600 {1500}, IV 1600; patella I 1000, II–IV 1010; tibia I 2003, II 3013, III 3123, IV 3133; metatarsus I 2014, II 2024, III 3134, IV 5144. MEA- SUREMENT OF PALP AND LEGS: palp 2.5 [0.9, 0.3, 0.4, 0.9], I 5.5 [1.8, 0.8, 1.2, 1.1, 0.6], II 5.7 [1.9, 0.9, 1.2, 1.1, 0.6], III 7.2 [2.3, 1.0, 1.6, 1.7, 0.6], IV 6.6 [2.1, 0.8, 1.4, 1.7, 0.6]. LEG FORMULA: 3421. COPULATORY ORGAN: embolus (E) (actual tubular section) quite long, main section relatively broad and retrolaterally with semicircle course, distal third of E very narrow and with irregularly bifurcated tip having a quite long, light and slen- der retrolatero-distal extension and a tiny, conical prolateral process ( Figs 45A View FIGURE 45 , 66J View FIGURE 66 ); embolus base (EB) completely visible in ventral view, width of EB circle broader than 3/4 the width of T; EB located (almost) centrally at distal part of T; T about as broad as cymbium ( Figs 45A View FIGURE 45 , 66J View FIGURE 66 ); sperm duct double-stacked S-shaped, occupying about 2/3 of T from retrolateral; proximal tegulum lobe not distinguished from remaining section of T but T retrolatero-proximally conically converging with blunt-rounded (but irregularly rounded) ending; cymbium in ventral view distally conically converging, at distalmost section rounded; palpal tibia not distinctly short, just slightly broader than long ( Figs 45A View FIGURE 45 , 66J View FIGURE 66 ) and ventral tibial bump in ventral view very flat and located in central section of prolateral half of palpal tibia; RTA in ventral view moderately narrow, long, with retrolatero-distal to distal direction and with inconspicuous (prolatero-) dorsal serration ( Figs 45A View FIGURE 45 , 66J View FIGURE 66 ), in retrolateral view inconspicuous serration only recognisable at distal section of RTA ( Figs 45B View FIGURE 45 , 70C View FIGURE 70 ). COLOURATION: see genus description for conservative aspects. Carapace dark (red-) brown, proximal sections of lateral margins without broad bands of dense, light scale hairs ( Fig. 59I View FIGURE 59 ). Legs dark brown to red-brown, except for proximalmost articles and tarsi being lighter ( Fig. 59I View FIGURE 59 ). Opisthosoma like noted in genus description under general dorsal colouration, however central transversal band very narrow (even narrower than posterior band) and distinctly even and straight, chevron-like patch in central band missing ( Fig. 59I View FIGURE 59 ).

Female: unknown.

Remarks. Several characters correspond well to C. trochophora Bayer   , sp. nov.: semicircle course of embolus (E) retrolateral to embolus base (EB); (almost) round and long EB located (almost) centrally at distal part of tegulum; very narrow distal third of E; irregularly bifurcated tip of E, meaning with a retrolatero-distal extension on E; very flat ventral tibial bump; quite long RTA with (indistinct) serration only at distal 1/4. Despite the fact that the type localities of C. trochophora Bayer   , sp. nov. and C. lineata Bayer   , sp. nov. are far distant from each other, these similarities probably indicate a close relationship between these two species.

Distribution. Known only from the type locality in East Berbice-Corentyne, Guyana.