Corythalia trochophora Bayer, 2020

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 : 92-93

Corythalia trochophora Bayer , sp. nov.

Figs 44 A–B, 59H, 66I, 70B

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Type material. Holotype: ♂, ECUADOR: Tungurahua Province: Baños de Agua Santa , about 1800 m a.s.l., ca. 01°23’S, 78°25’W, W. Weyrauch leg. 05 Apr. 1958, with remark “with the same locality and dates as RII/12732”, ex Coll. Carl-Friedrich Roewer RII/12737, SMF (collection number not yet given).

Etymology. The specific name refers to the embolus (except for the distal third) building an almost exact wheel or hoop together with the rim of the embolus base (Ancient Greek “trochos” means “wheel” or “hoop”, “phorein” means “to carry, to wear”); concatenated term in apposition.

Diagnosis. Males distinguished from those of all other Corythalia species by the following characters in combination: embolus (E) (actual tubular section) long, quite narrow (longer than width of tegulum (T), narrower than RTA in ventral view), main section retrolaterally with semicircle course and distal third very narrow and with irregularly bifurcated tip having long, light, minimally curved and conspicuously slender retrolatero-distal extension and tiny, conical prolateral process ( Figs 44A , 66I ); base of E (EB) in ventral view compressed round and distinctly long (longer 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 3/4 of palpal tibia ( Figs 44A , 66I ).

Description. Male: total length 6.1, carapace length 2.6, maximal carapace width 1.9, width of eye rectangle 1.6, opisthosoma length 2.7, opisthosoma width 1.8, fovea length 0.24. EYES: AME 0.52, ALE 0.34, PME 0.08, PLE 0.27, AME–AME 0.04, AME–ALE 0.07, PME–PME 1.35, PME–PLE 0.25, ALE–PLE 0.65, PLE–PLE 1.20, clypeus height at AME 0.34, clypeus height at ALE 0.62. 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 1400, II 1500 {1600}, III–IV 1600; patella I–II 1000, III–IV 1010; tibia I 2004, II 3004, III 3133{4133}, IV 3133; metatarsus I 2004, II 2014, III 3134{3234}, IV 4144. MEASUREMENT OF PALP AND LEGS: palp 2.3 [0.8, 0.4, 0.3, 0.8], I 4.5 [1.4, 0.8, 0.9, 0.9, 0.5], II 4.4 [1.5, 0.7, 0.8, 0.9, 0.5], III 5.6 [1.8, 0.8, 1.2, 1.2, 0.6], IV 5.7 [1.8, 0.7, 1.2, 1.4, 0.6]. LEG FORMULA: 4312. COPULA- TORY ORGAN: embolus (E) (actual tubular section) long, quite narrow, main section retrolaterally with semicircle course and distal third very narrow and with irregularly bifurcated tip having a long, light and conspicuously slender retrolatero-distal extension and a tiny, conical prolateral process ( Figs 44A , 66I ); embolus base (EB) in ventral view completely visible, width of EB circle broader than 3/4 the width of T; EB located almost centrally at distal part of T; T minimally narrower than cymbium ( Figs 44A , 66I ); 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 ending; cymbium in ventral view distally conically converging, at distalmost section rounded; palpal tibia very short, distinctly broader than long ( Figs 44 A–B, 66I, 70B) and ventral tibial bump in ventral view very flat but broad and located in central section of prolateral half of palpal tibia; RTA in ventral view moderately narrow, long and with retrolatero-distal to distal direction and with inconspicuous (prolatero-) dorsal serration ( Figs 44A , 66I ), in retrolateral view serration only recognisable at tip of RTA ( Figs 44B , 70B ). COLOURATION: see genus description for conservative aspects. Carapace dark (red-) brown ( Fig. 59H ). Legs quite light brown to red-brown, except for some articles being even lighter (see genus description) ( Fig. 59H ). Opisthosoma like noted in genus description under general dorsal colouration, however central and anterior transversal bands quite narrow and not very conspicuous, chevron-like patch in central band missing ( Fig. 59H ).

Female: unknown.

Remarks. The semicircle course of the embolus (E) retrolateral to the embolus base (EB), the (almost) round and very long EB located (almost) centrally at distal part of tegulum, the very narrow distal third of E, the irregularly bifurcated tip of E,, meaning with a light, retrolatero-distal extension on E; the very flat ventral tibial bump and the quite long RTA with (indistinct) serration only at distal 1/4 probably indicate a close relationship between C. trochophora Bayer , sp. nov. and C. lineata Bayer , sp. nov.

Distribution. Currently known only from the type locality in Tungurahua, Ecuador.

Figures

FIGURE 44. Corythalia trochophora Bayer, sp. nov., male holotype from Tungurahua, Ecuador.A–B left palp (A ventral view; B retrolateral view).

FIGURE 59. Corythalia spp., photographic images of male specimens, dorsal view. Corythalia electa: A Lectotype from Colombia. Corythalia chalcea: B. Male AMNH-IZC 00327853 from Aragua, Venezuela. Corythalia metallica: C Holotype from St. Vincent Island. Corythalia blanda: D Paralectotype M-3 from Trinidad. Corythalia xanthopa: E Male AMNH-IZC 00326886-II from Aragua, Venezuela. Corythalia latior sp. nov.: F. Holotype from El Beni, Bolivia. Corythalia hadzji: G Lectotype from Upper Demerara-Berbice, Guyana. Corythalia trochophora Bayer, sp. nov.: H Holotype from Tungurahua, Ecuador. Corythalia lineata Bayer, sp. nov.: I Holotype from East Berbice-Corentyne, Guyana.

FIGURE 66. Corythalia spp., photographic images of left palps of male specimens, ventral view. Corythalia electa: A Lectotype from Colombia. Corythalia chalcea: Male AMNH-IZC 00327893 (B) and male AMNH-IZC 00327910-3 (C) from Aragua, Venezuela. Corythalia metallica: D Holotype from St. Vincent Island. Corythalia blanda: E Paralectotype M-3 from Trinidad. Corythalia xanthopa: F Male M-4, AMNH-IZC 00326903 from Aragua, Venezuela. Corythalia latior sp. nov.: G Holotype from El Beni, Bolivia. Corythalia hadzji: H Lectotype from Upper Demerara-Berbice, Guyana. Corythalia trochophora Bayer, sp. nov.: I Holotype from Tungurahua, Ecuador. Corythalia lineata Bayer, sp. nov.: J Holotype from East Berbice-Corentyne, Guyana. Corythalia hamulifera Bayer, sp. nov.: K Holotype from south-eastern part of Ecuador.

FIGURE 70. Corythalia spp., photographic images of left palps of male specimens, retrolateral view. Corythalia hadzji: A Lectotype from Upper Demerara-Berbice, Guyana. Corythalia trochophora Bayer, sp. nov.: B Holotype from Tungurahua, Ecuador. Corythalia lineata Bayer, sp. nov.: C Holotype from East Berbice-Corentyne, Guyana. Corythalia hamulifera Bayer, sp. nov.: D Holotype from south-eastern part of Ecuador. Corythalia tribulosa sp. nov.: E Holotype from Putumayo, Colombia. Corythalia valida: F Lectotype from Amazonas, Brazil. Corythalia flagrans sp. nov.: G Holotype from Acre, Brazil. Corythalia fragilis sp. nov.: H Paratype SMNK-ARA 02236 from Amazonas, Brazil. Corythalia grata: I Lectotype from São Paulo, Brazil. Corythalia vervloeti: J Male M-2 from Amazonas, Brazil. Corythalia opima: K Lectotype from eastern part of Guatemala. Corythalia spiralis: L Lectotype from Chiriquí, Panama.