Taxonomic revision of the Neotropical spiders of the genus Idiops Perty, 1833 (Araneae, Idiopidae), with description of four new species Author Fonseca-Ferreira, Rafael 8E23FE6D-3D20-4667-9F69-15B132D9537B Pós-graduação em Ecologia, Evolução e Biodiversidade, Instituto de Biociências, Universidade Estadual Paulista, Avenida 24 A 1515, 13506 - 900 Rio Claro-SP, Brazil. rafaelbioferreira@gmail.com Author Guadanucci, José Paulo Leite D4955FF5-FE7F-4E68-AB2F-4A89593F9850 Departamento de Ecologia, Evolução e Biodiversidade, Instituto de Biociências, Universidade Estadual Paulista, Avenida 24 A 1515, 13506 - 900 Rio Claro-SP, Brazil. jose.guadanucci@unesp.br Author Yamamoto, Flávio Uemori 86719D83-2F02-4122-8CCE-D0932A3206D0 Laboratório de Coleções Zoológicas, Instituto Butantan, Av. Vital Brasil, 1500, Butantã, São Paulo, São Paulo, CEP 05503 - 900, Brazil. flayamamoto@gmail.com Author Brescovit, Antonio Domingos D5B81D79-AFAE-47B1-8A6E-DAB448A24BCC Laboratório de Coleções Zoológicas, Instituto Butantan, Av. Vital Brasil, 1500, Butantã, São Paulo, São Paulo, CEP 05503 - 900, Brazil. antonio.brescovit@butantan.gov.br text European Journal of Taxonomy 2021 2021-11-25 780 1 1 71 http://dx.doi.org/10.5852/ejt.2021.780.1581 journal article 3103 10.5852/ejt.2021.780.1581 41b8f51f-1d31-44c0-851e-2697e4e9497f 2118-9773 5761280 932663A6-D83D-49E0-B1F7-87F7DA8DC086 Idiops clarus ( Mello-Leitão, 1946 ) Figs 3C , 6B , 15–16 Juambeltzia clara Mello-Leitão, 1946: 6 , figs 6–9. Juambeltzia clara – Bücherl 1957: 383 , figs 3–3a. Idiops clarus – Schiapelli & Gerschman de Pikelin 1971: 58 , figs 1–7. — Ferretti et al. 2017: 977 , figs 1a–f, 2a–c, 3d. Emended diagnosis Males ( Fig. 15A–H ) and females ( Fig. 15I–K ) of Idiops clarus differ from the other Neotropical species by having the posterior lateral eyes separated from the median eye group ( Fig. 15A, I ) and by the rounded sternum ( Fig. 15B ). Males also differ from others by having the palpal tibia short and thick, with a projection at the base of the retrolateral depression (also present in I. fuscus and I. pirassunsunguensis ) ( Fig. 15C ) and by the presence of a distal embolar tooth close to the opening of the sperm duct (also present in I. germaini ) ( Fig. 16E ). Females differ by the aspect of the spermathecae with the extensive basal area divided by a non-sclerotized portion and by ducts distant from each other and a sclerotized area in the transition between duct and receptacle ( Fig. 15K ). Type material Holotype URUGUAY – Florida • ♂ ; San Gabriel ; A. Juambeltz leg.; MHNM . The type specimen was not found in the MHNM, probably lost. Other material examined URUGUAY – Rivera • 1 ♂ (SEM); Rivera , Near Vichadero ; 31°48′ S , 54°43′ W ; 23 Nov. 1959 ; C.C. , P.S.M. and A.M. leg.; FCE 0340 . – Cerro Largo • 1 ♂ ; Arroyo Chui del Tacuarí ; 32°32′42″ S , 54°2′45″ W ; 15 Nov. 1972 ; A.S.P. , C.C. , L.Z.C. and N.E.L. leg.; MNHN 295 . – Río Negro • 1 ♂ ; Tres Arboles ; 32°26′ S , 56°42′ W ; 1 Apr. 2009 ; Stora Enso/Trampa PC ; FCE 1075 • 1 ♂ ; Tres Arboles ; 1 Apr. 2009 ; Stora Enso/Trampa PB 2; FCE 1085 • 2 ♂♂ ; Tres Arboles ; 1 Mar. 2009 ; Stora Enso/Trampa PC ; FCE 1115 • 1 ♂ ; Tres Arboles ; 1 Feb. 2009 ; Stora Enso/Trampa PB 4; FCE 1118 • 2 ♂♂ ; Tres Arboles ; 1 Mar. 2009 ; Stora Enso/Trampa ECD ; FCE 1152 • 1 ♂ ; Tres Arboles ; 1 Mar. 2009 ; Stora Enso/Trampa PB ; FCE 1161 • 4 ♂♂ ; 1 Jan. 2009 ; Stora Enso/Trampa MB and EC ; FCE 1171 . – Treinta y Tres • 1 ♂ ; Santa Clara de Olimar ; 32°55′ S , 54°58′ W ; 12 Jan. 1960 ; L.C. Zolessi and A. Spiritoso leg.; FCE 0337 . – Lavalleja • 1 ♀ , 1 juv. ; Aguas Blancas ; 34°32′ S , 55°24′ W ; 9 Nov. 1958 ; FCE 0339 . – Canelones • 1 ♂ ; Ruta 11 Km 144 ; 34°35′09″ S , 55°50′23″ W ; 26 Jun. 2010 ; F. Costa and F. Pérez-Miles leg.; FCE 1015 • 1 ♂ ; Piedras de Afilar ; 34°45′33″ S , 55°31′32″ W ; 19–26 Apr. 2010 ; M. González leg.; trampa pitfall ; FCE 1021 . – Maldonado • 1 ♀ ; Sierra de las Animas ; 34°42′ S , 55°19′ W ; 23 Feb. 1969 ; L.C. Zolessi leg.; FCE 0335 • 1 juv. ; Sierra de las Animas ; 21 Mar. 1971 ; FCE 0336 • 1 ♀ ; Sierra de las Animas ; 34º42′ S , 55º19′ W ; 21 Mar 1971 ; FCE 0338 • 2 ♀♀ , 2 juvs ; Sierra de las Animas ; 2 Nov. 1969 ; L.C. Zolessi leg.; FCE 0342 • 1 ♀ ; Sierra de las Animas ; 11 Feb. 1970 ; L.C. de Zolessi leg.; MNHN 373 • 1 ♂ ; Sierra de las Animas ; 21 Mar. 1971 ; S. Etcheverrigaray leg.; MNHN 718 . – Montevideo • 1 ♂ ; Prado , Liceo Bauzá ; 34°51′ S , 56°12′ W ; 19 Apr. 2002 ; A. Mignone leg.; FCE 0341 . The specimens registered for Argentina and reviewed by Ferretti et al. 2017 were not examined here. Despite this, they were included in the species distribution map. Description Male (FCE 0341) HABITUS. See Fig. 15A . MEASUREMENTS. TBL 11, CL 5.7, CW 4.8, LL 0.6, LW 1.2, SL 3, SW 2.9. COLOR. Carapace, legs and sternum light brown ( Fig. 15A–B ), abdomen gray. PROSOMA. Carapace and ocular arrangement as shown in Fig. 15A . Eye tubercle: 1.4 long; 1.6 wide. Distance AME-ALE 0.8. Eye diameters:AME 0.3, ALE 0.4, PME 0.3, PLE 0.3. Thoracic fovea procurved. Labium and sternum without cuspules ( Fig. 15B ). Basal segment of chelicerae with a prolateral row of 5 large teeth and retrolateral row with 9 small teeth ( Fig 15A ), rastellum with 8 spines, distal spines are longer ( Fig. 16B ). Fig. 15. Idiops clarus ( Mello-Leitão, 1946 ) . A–H . ♂ (FCE 0341). A . Prosoma (dorsal view). B . Prosoma (ventral view). C . Part of palp (retrolateral view). D–F . Palpal bulb. D . Dorsal view. E . Retrolateral view. F . Prolateral view. G . Tibial apophysis (prolateral view). H . Tibial apophysis and metatarsus I (dorsal view). I–K . ♀, (FCE 0338). I . Prosoma (dorsal view). J . Prosoma (ventral view). K . Genitalia (dorsal view). Abbreviation: DET = distal embolar tooth. Scale bars = 1 mm. LEGS. Tibia and metatarsus I as shown in Fig. 15H . Leg I with an apical branch of tibial apophysis with a short and triangular basal spine, and an apical branch with a conical spine twice the size of basal spine. Pseudoscopula: tarsus I divided into rows of thick hair; tarsus II–IV totally covered. PALP. Tibia with conspicuous retrolateral depression, with projection on basal portion and larger spines concentrated on basal and apical portions ( Figs 15G , 16C ); embolus with subapical torsion and presence of a small embolar tooth close to spermatic duct opening ( Figs 15D–F , 16E–F ). PALP AND LEG MEASUREMENTS. Palp = 9.3 (3, 1.6, 3.1, 1.6), I = 21.3 (5.9, 3.2, 4.3, 5, 2.9), II = 19.7 (5, 2.5, 3.4, 4.2, 2.6), III = 14. 9 (3.5, 2.3, 2.3, 4, 2.8), IV = 21.2 (5.4, 2.9, 4.5, 5.4, 3). SPINATION. Palp: Ti r24, Ta d0-0-4. Leg I: Fe d1-1-2, Ti v1r-1r-2r, Mt 1r-2r-1ap, Ta r2-1-0. Leg II: Fe d1-1-2, Ti v0-2r-1r-1, Mt v1r-1r-1r-2, Ta p0-0-1, r2-2-0. Leg III: Fe d1-1-1, Pa d1-1-0, p3-5-8, r0-0-2, Ti v0-1r-0-2, p1-1-4, r1-1-2, Mt v3-4-0-4, p3- 2-2, r0-1-2, Ta p0-4-8, r0-4-8. Leg IV: Fe d1-1-2, Pa p16-3-0, Ti v1-2-2, Mt v1-2 -1-3, Ta p2-3-6, r0-0-2. Female (FCE 0338) HABITUS. See Fig. 15I . MEASUREMENTS. TBL 17.3, CL 7.5, CW 6.3, LL 1.2, LW 1.6, SL 4.4, SW 4.3. COLOR. Carapace, legs and sternum light brown ( Fig. 15I–J ), abdomen gray. Fig. 16. Scanning electron micrographs of Idiops clarus ( Mello-Leitão, 1946 ) , ♂ (FCE 0340). A . Chelicera (retrolateral view). B . Rastellum (retrolateral view). C . Tibial apophysis (dorsal view). D . Part of the palp, showing retrolateral depression. E–F . Detail of the final portion of the embolus. E . Retrolateral view. F . Prolateral view. Abbreviation: DET = distal embolar tooth. Scale bars = 0.5 mm. PROSOMA. Carapace and ocular arrangement as shown in Fig. 15I . Eye tubercle: 2.2 long; 2.7 wide. Distance AME-ALE 1. Eye diameters:AME 0.4,ALE 0.6, PME 0.5, PLE 0.7. Thoracic fovea procurved. Labium with 4–6 cuspules ( Fig. 15J ). Maxilla with 83 cuspules, distributed over the anterior ventral half ( Fig. 15J ). Basal segment of chelicerae with a prolateral row of 5 large teeth and a retrolateral row with 7 small teeth, grouped at basal half. PALP AND LEG MEASUREMENTS. Palp = 12.2 (4.1, 2.6, 2.7, 2.8), I = 13.3 (4.2, 3, 2.9, 2.2, 1), II = 11.1 (3.4, 2.7, 2.3, 2, 1), III = 12 (3.3, 2.6, 1.7, 2.4, 2), IV = 15.8 (4.1, 3.4, 3.3, 3.2, 1.8). SPINATION. Palp: Fe p0-0-2, Pa p0-0-1, Ti p7-8-11, r3-10-13, Ta v0-0-6, p12-10-8, r12-10-12. Leg I: Ti p5-5-8, r6-8-12, Mt p11-8-10, r9-8-7, Ta v0-6-7, p4-5-2, r5-4-3. Leg II: Ti p2-7-6, r2-4-1, Mt p10-9-7, r4-5-3, Ta v0-1-7, p4-5-3, r4-2-1. Leg III: Pa p5-5-16, r0-0-2, Ti p5-7-10, r3-7-10, Mt v0-0-2, p12-7-6, r7-5-4, Ta v0-6-22. Leg IV: Pa p30-5-0, Ti v0-1-1-2, Mt v0-2-5-3, Ta v1-9-14. SPERMATHECAE. Duct with basal portion shorter than apical portion and non-sclerotized spherical receptacles with evident granules ( Fig. 15K ). Distribution Uruguay and Argentina ( Fig. 3C ).