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 sertania Fonseca-Ferreira, Guadanucci & Brescovit sp.nov. urn:lsid:zoobank.org:act: 8C6CC368-27DF-45A0-9164-2CA32C4D0F39 Figs 4C , 32–33 Diagnosis Males of Idiops sertania sp. nov. differ from those of other Neotropical species by having the robust embolus with a wide basal half, strongly curved dorsally, with torsion at the apical end and a conspicuous embolar lamella close to the opening of the sperm duct ( Figs 32D–F , 33E–F ) and by having the palpal tibia elongated (similar to I. germaini ) ( Fig. 32C ). Differs from I. germaini by having large spines distributed along the margin of the retrolateral depression ( Figs 32C , 33D ) and by the robust tibial apophysis ( Fig. 32H ). Etymology The term ʻsertaniaʼ, referenced in the specific epithet, is a tribute to the ʻsertãoʼ of Brazil , a large region of the country where these spiders occur. The term sertão refers to culturally diverse regions, far from the coast and large cities, and generally associated with rural regions with little human occupation. Type material Holotype BRAZIL – Minas Gerais • ♂ ; Januária , Parque Nacional Cavernas do Peruaçu ; 15°10′0″ S , 44°22′0″ W ; 3–25 Jan. 2008 ; M.T. Junior and R.S. Recoder leg.; IBSP 15348 . Paratypes BRAZIL – Amazonas • 1 ♂ ; Nova Aripuanã , Santa Maria , Margem esquerda , Rio Arapuanã ; 5°47′52′′ S , 60°15′55′′ W ; May 2002 ; M. Trefaut leg.; MZUSP 21511 . – Piauí • 1 ♂ ; Guaribas , Parque Nacional da Serra das Confusões ; 9°13′16″ S , 43°29′21″ W ; Oct. 2006 ; P.R.R.Silva et al. leg.; CHNUFPI 4031 . – Ceará • 1 ♂ ; Crato , Floresta Nacional do Araripe ; 07°27′07.3″ S , 39°19′52.4″ W ; 2018 ; R. Azevedo leg.; IBSP 227617 . – Minas Gerais • 1 ♂ ; same collection data as for holotype; IBSP 15346 . Fig. 32. Idiops sertania Fonseca-Ferreira, Guadanucci & Brescovit sp. nov. , ♂, holotype (IBSP 15348). 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 . Tibia, metatarsus and tarsus I (prolateral view). H . Tibial apophysis (prolateral view). I . Tibial apophysis and metatarsus I (dorsal view). Abbreviations: EL = embolar lamella; K = keel. Scale bars = 1 mm. Other material examined BRAZIL – Piauí • 5 ♂♂ (SEM); Bom Jesus , Estação Ecológica de Uruçuí-Una ; 08°52′5″ S , 44°57′ W ; 19–29 Jan. 2001 ; G.G. Martinelle leg.; MZSP 21546 • 2 ♂♂ ; União , Campus COMVAPI Ltda ; 4°35′9″ S , 42°51′50″ W ; 2006 ; J. Queiroz et al. leg.; CHNUFPI 0032 , CHNUFPI 0035 • 2 ♂♂ ; same collection data as for preceding; CHNUFPI 0037 • 3 ♂♂ ; same collection data as for preceding; CHNUFPI 0034 • 2 ♂♂ (SEM); same collection data as for preceding; CHNUFPI 0039 • 2 ♂♂ ; same collection data as for preceding; CHNUFPI 0033 • 1 ♂ ; same collection data as for preceding; 4°38′6″ S , 42°50′19″ W ; CHNUFPI 4035 • 2 ♂♂ ; same collection data as for preceding; CHNUFPI 0031 . – Ceará • 1 ♂ ; Crato , Parque Estadual Sítio do Fundão ; 07°13′3″ S , 39°20′21″ W ; 2018 ; R. Azevedo leg.; IBSP 218294 • 2 ♂♂ ; Crato , Floresta Nacional do Araripe ; 07°27′07.3″ S , 39°19′52.4″ W ; 2018 ; R. Azevedo leg.; IBSP 218307 , IBSP 227583 . – Paraíba • 1 ♂ ; Areia , Mata do Pau Ferro ; 06°67′45.8″ S , 35°55′27″ W ; 5 Aug. 2011 ; S.B.R. Alencar et al. leg.; CHNUFPI 0041 . – Bahia • 1 ♂ ; Contendas do Sincorá , Floresta Nacional Contendas do Sincorá ; 13°55′08,7″ S , 41°07′13,8″ W ; 12–14 Jan. 2012 ; I.L.F. Magalhães et al. leg.; IBSP 271351 – Tocantins • 1 ♂ ; Palmas , Taquarussu ; 10°19′ S , 48°9′ W ; Equipe IBSP leg.; IBSP 10415 • 1 ♂ ; Porto Nacional , Área urbana, UHE Luiz Eduardo Magalhães ; 10°42′28″ S , 48°25′1″ W ; Equipe IBSP leg.; IBSP 10437 . – Goiás • 6 ♂♂ ; Caldas Novas , UHE Corumbá ; 17°42′50″ S , 48°32′12″ W ; 12–23Aug. 1996 ; M.T.I. Rodrigues et al. leg.; MZSP 15656 • 2 ♂♂ ; Colinas do Sul , Serra da Mesa ; 14°01′ S , 48°12′ W ; 2–15 Dec. 1995 ; Silvestri , Dietz and Campaner leg.; MZSP 28851 • 1 ♂ ; Catalão , Barragem , Serra do Facão ; 17°31′51.07″ S , 47°33′29.57″ W ; Jul. 2013 ; R.B. Martines and R.M.C. Silveira leg.; UFMG 4442 • 4 ♂♂ ; Catalão , Barragem , Serra do Facão ; 17°35′34″ S , 47°37′16″ W ; Jul. 2011 ; R.B. Martines and R.M.C. Silveira leg.; UFMG 4441 • 1 ♂ ; Catalão , Barragem , Serra do Facão ; 17°51′40″ S , 47°37′38″ W ; Jul. 2012 ; R.B. Martines and R.M.C. Silveira leg. UFMG 4440 . – Mato Grosso • 1 ♂ ; Chapada dos Guimarães ; 15°27′39″ S , 55°45′0″ W ; 20–30 Sep. 2000 ; C. Strussmann leg.; MCTP 11557 • 2 ♂♂ ; Chapada dos Guimarães ; 20–29 Sep. 2000 ; C. Strussmann leg.; MCTP 13614 • 2 ♂♂ ; Chapada dos Guimarães ; 20–28 Sep. 2000 ; C. Strussmann ; MCTP 13661 ; 2 ♂♂ ; Poconé ; 16°15′25″S , 56°37′22″ W ; 2010–2012 ; D. Batistella leg., Winkler extractor ; IBSP 249196 . – Mato Grosso do Sul • 1 ♂ ; Três Lagoas , Fazenda Canaã ; 20°45′04″ S , 51°40′42″ W ; Dec. 1967 ; F. Lane leg.; MZSP 7575 . – Minas Gerais • 2 ♂♂ ; Januária , Parque Nacional Cavernas do Peruaçu ; 15°10′0″ S , 44°22′0″ W ; 3–25 Jan. 2008 ; M. Teixeira-Junior and R.S. Recoder leg.; IBSP 15345 , IBSP 15347 • 2 ♂♂ ; same collection data as for preceding; IBSP 210881 . Fig. 33. Scanning electron micrographs of Idiops sertania Fonseca-Ferreira, Guadanucci & Brescovit sp. nov. , ♂ (CHNUFPI 0039). 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: EL = embolar lamella. Scale bars: A–D = 0.5 mm; E–F = 0.3 mm. Description Male ( holotype IBSP 15348) HABITUS. See Fig. 32A . MEASUREMENTS. TBL 15.6, CL 7.7, CW 6.9, LL 1, LW 1.3, SL 4, SW 3.7. COLOR. Dark brown carapace, reddish brown legs, light brown sternum, abdomen gray ( Fig. 32A–B ). PROSOMA. Carapace and ocular arrangement as shown in Fig. 32A . Eye tubercle: 0.9 long; 1.2 wide. AME-ALE distance 1. Eye diameters: AME 0.2, ALE 0.4, PME 0.2, PLE 0.5. Thoracic fovea procurved ( Fig. 32A ). Labium and sternum without cuspules ( Fig. 32B ). Basal segment of chelicerae with a prolateral row of 6 large teeth and 6 small retrolateral teeth, grouped in the basal half, proeminent rastellum with 11–12 spines, distals largest ( Fig. 33A–B ). LEGS. Tibia, metatarsus and tarsus I as shown in Fig. 32G . Leg I with tibial apophysis with apical branch twice the size of basal branch ( Figs 32H–I , 33C ). Pseudoscopula: tarsus I weakly covered, II–IV totally covered. PALP. Tibia with conspicuous retrolateral depression and large spines distributed along its entire length ( Figs 32C , 33D ); embolus with keel in retrolateral view ( Fig. 32E ). PALP AND LEG MEASUREMENTS. Palp = 10.2 (2.4, 2.2, 3.9, 1.7), I = 23.6 (7.2, 3.3. 4.9, 5.4, 2.8), II = 20.8 (6.4, 2.9, 4.4, 4.8, 2.3), III = 19.3 (5.3, 2.5, 3.6, 5, 2.9), IV = 27 (7.1, 3.4, 6, 7, 3.5). SPINATION. Palp: Ti r20, Ta d0-0-2. Leg I: Pa v4, Ti v4-5-4, Mt r1-1-4, p0-0-4, Ta r3-4-3, p1-3-2. Leg II: Pa p0-0-4, r0-0-3, Ti v6-5-7, Mt p0-2-3, r2-3-4, Ta p2-2-3, r4-3-4. Leg III: Pa p1, Ti v1-2-2, p0-0-1, Mt v2-4-5, p2-2-2, Ta r4-4-5. Leg IV: Pa v0-0-2, Ti v1-1-3, Mt v9-9-11, d1-1-2, r0-0-3, p0-1-2, Ta p3-3-7, r0-0-2. Distribution Brazil . Widely distributed, with areas covering the phytophysiognomies of the Amazon, Caatinga and Cerrado. Records for Central-west region ( Goiás , Mato Grosso and Mato Grosso do Sul ), North region (Amazonas), Northeast region ( Bahia , Ceará and Piauí ) and Southeast region (northern part of Minas Gerais ) ( Fig. 4C ).