Idiops pirassununguensis Fukami & Lucas, 2005

Fonseca-Ferreira, Rafael, Guadanucci, José Paulo Leite, Yamamoto, Flávio Uemori & Brescovit, Antonio Domingos, 2021, Taxonomic revision of the Neotropical spiders of the genus Idiops Perty, 1833 (Araneae, Idiopidae), with description of four new species, European Journal of Taxonomy 780 (1), pp. 1-71 : 50-54

Idiops pirassununguensis Fukami & Lucas, 2005

Figs 2E–F , 4C , 6G , 27–28

Idiops pirassununguensis Fukami & Lucas, 2005: 2 , figs 1–5.

Diagnosis

Males of Idiops pirassununguensis differ from those of other Neotropical species by having the tibial apophysis with a robust apical branch and a prominent spine in prolateral view ( Figs 27H–I , 28C ), metatarsus I long with a prolateral projection on the apical half ( Fig. 27I ) and the embolus with a prominent lamella that expands along the apical half, with a constriction near the sperm duct opening ( Figs 27D–F , 28E–F ). Females differ by having the spermathecae with long vertical ducts, and strong sclerotization on the transition between duct and receptacula, with the same diameter as ducts ( Fig. 27L ).

Type material

Holotype BRAZIL – São Paulo • ♂; Pirassununga ; Nov. 1997; P. Valdujo leg.; IBSP 9565 .

Other material examined

BRAZIL – Amapá • 7 ♂♂; Mazagão ; 0°6′54″ S, 51°17′20″ W; 3 Dec. 2003; R.A. da Silva leg.; MCTP 16519 . – Amazonas • 2 ♂♂; Manaus, PAE Lago Grande ; 3°3′45″ S, 59°59′19″ W; 2–7 Jul. 2007; Projeto Geoma 2 leg.; INPA 6914 , INPA 6916 • 1 ♀; Manaus, PAE Lago Grande ; 5 May 2007; A.L. Tourinho and R. Saturnino leg.; INPA 6915 . – Pará • 1 ♂; Parauapebas ; 6°4′4″ S, 49°54′7″ W; Sep. 2008; C.A.R. Souza leg.; IBSP 225254 . – Rondônia • 1 ♂; Pimenta Bueno ; 11°40′21″ S, 61°11′37″ W; Jul. 2000; L. Carvalho leg.; IBSP 13335 • 2 ♂♂; same collection data as for preceding; IBSP 13337 • 4 ♂♂; Vilhena ; 12°44′26″ S, 60°8′45″ W; Sep. 1999; L. Carvalho leg.; IBSP 14400 • 2 ♂♂; same collection data as for preceding; IBSP 14401 , IBSP 14403 • 2 ♂♂; same collection data as for preceding; IBSP 14402 . – Maranhão • 1 ♂; Caxias, Área de Proteção Ambiental Municipal do Inhamum ; 04°53′30′′ S, 43°24′53″ W; 2–5 Oct. 2007; Lima-Lobato leg.; IBSP 130947 • 1 ♂; same collection data as for preceding; IBSP 129120 . – Goiás • 2 ♂♂ (SEM); Caldas Novas, UHE Corumbá ; 17°42′50″ S, 48°32′22″ W; 12– 23 Aug. 1996; M.T.I. Rodrigues et al. leg.; MZSP 15651 . – Piauí • 5 ♂♂; Alvorada do Gurguéia, Fazenda Escola UFPI ; 8°22′11.5″ S, 43°51′30.2″ W; 4–12 Sep. 2018; D.B.S. Barbosa et al. leg.; CHNUFPI 2715 • 5 ♂♂; same collection data as for preceding; CHNUFPI 2713 • 12 ♂♂; same collection data as for preceding; CHNUFPI 2714 • 15 ♂♂; same collection data as for preceding; CHNUFPI 2576 to 2590 • 2 ♂♂; Castelo do Piauí, Fazenda Bonito , ECB Rochas Ornamentais do Brasil LTDA ; 5°13′59″ S, 41°41′14.5″ W; 11 Dec, 2005; F.M. Oliveira-Neto et al. leg.; MPEG 2336 • 2 ♂♂; same collection data as for preceding; MPEG 2339 , MPEG 2401 • 1 ♂; Castelo do Piauí, Fazenda Bonito , ECB Rochas Ornamentais do Brasil LTDA ; 5º13′47.7″ S, 41°41′36.6″ W; MPEG 2337 • 1 ♂; Castelo do Piauí, Fazenda Bonito, ECB Rochas Ornamentais do Brasil LTDA ; 5º14′12.8″ S, 41°41′0.8″ W; MPEG 2338 • 2 ♂♂; Castelo do Piauí, Fazenda Bonito , ECB Rochas Ornamentais do Brasil LTDA ; 5°19′19″ S, 41°33′10″; CHNUFPI CASTa0226 • 1 ♂; same collection data as for preceding; CHNUFPI CASTa0225 • 1 ♂; Castelo do Piauí, Fazenda Bonito , ECB Rochas Ornamentais do Brasil LTDA ; 5°13′46.7″ S, 41°41′29.9″ W; 25 Oct. 2005; F.M. Oliveira-Neto et al. leg.; CHNUFPI 4024 • 2 ♂♂; Castelo do Piauí, Fazenda Bonito , ECB Rochas Ornamentais do Brasil LTDA ; 5°13′59″ S, 41°41′14.5″ W; 8 May 2005; F.M. Oliveira-Neto et al. leg.; CHNUFPI 4028 • 2 ♂♂; same collection data as for preceding; CHNUFPI 2712 • 3 ♂♂; same collection data as for preceding; CHNUFPI 4025 to 4027 • 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 4029 • 1 ♂; same collection data as for preceding; CHNUFPI 4030 • 2 ♂♂; Gilbués, Olhos Dágua da Santa , PN Serra das Confusões ; MZSP 19974 • 1 ♂; São Raimundo Nonato, Parque Nacional Serra da Capivara ; 8°25′0″ S, 42°20′0″ W; 27 Oct.–9 Nov. 2012; R. Recoder and M. Teixeira Jr. leg.; IBSP 167608 • 1 ♂; Uruçuí, Vale do Rio Pratinha , 40 km from Uruçuí; 7°50′08″ S, 44°27′05″ W; M.P.D. Santos et al. leg.; CHNUFPI 2711 • 1 ♂; Uruçuí; Fazenda União , Topo da Chapada , 40 km from Uruçuí; 7°41′41″ S, 44°26′30″ W; 26 Oct. 2007; F.M. Oliveira-Neto leg.; CHNUFPI 2710 . – Paraíba • 5 ♂♂; São José dos Cordeiros, RPPN Almas ; 7°28′45″ S, 36°54′18″ W; 2008–2009; A. Vasconcelos leg.; IBSP 228197 , IBSP 228200 to 228201 , IBSP 228205 , IBSP 228207 • 2 ♂♂; same collection data as for preceding; IBSP 228202 • 2 ♂♂; same collection data as for preceding; IBSP 228199 • 3 ♂♂; same collection data as for preceding; IBSP 228193 . – Sergipe • 1 ♂; Canindé do São Francisco, Fazenda São José-Olhos Dʼágua , UHE de Xingó ; 9°37′25″ S, 37°47′54″ W; 31 Oct. 2000; L. Ianuzzi leg.; IBSP 10183 . – Mato Grosso • 2 ♂♂; Pontes e Lacerda ; 15°19′10.38″ S, 59°17′33.70″ W; 5–10 Oct. 2013; R.A.K. Ribeiro leg.; UFMT • 2 ♂♂; Vila Bela da Santíssima Trindade, Córrego Areias ; 14°50′29.9″ S, 69°39′01.2″ W; 2–4 Nov. 2013; R.A.K. Ribeiro leg.; UFMT • 1 ♂; Lucas do Rio Verde, PCH Canoa Quebrada ; 12°47′ S, 56°00′ W; V.Azaias leg.; UFMT. – Minas Gerais • 1 ♂; Santana do Riacho, Parque Nacional Serra do Cipó ; 19°22′1″ S, 43°32′17″ W; Oct. 2004; UFMG 1740 • 2 ♂♂; Santa Luzia ; 19°46′12″ S, 43°51′3″ W; 9 Oct. 2004; UFMG 1730 , UFMG 1732 • 1 ♂; Santa Luzia , 19º46′43.52″ S, 43º50′26.56″ W; 17 Sep. 2011; B.R.N. Leg keys; UFMG 8471 • 1 ♀; Morro do Pilar ; 19º12′56″ S, 43º22′34″ W; 6 Aug. 2011; P.H. Martins leg.; UFMG 11296 • 1 ♀; Morro do Pilar ; 19º12′56″ S, 43º22′34″ W; 29 Jul. 2011; P.H. Martins leg.; UFMG 11297 • 1 ♀; Santana do Riacho ; 19º10′8″ S, 43º42′57″ W; 9 Jul. 2011; P.H. Martins leg.; UFMG 11264 • 2 ♂♂, 1 ♀; Santana do Riacho, Parque Nacional Serra do Cipó ; 19°21′06.8″ S, 43°36′38.8″ W; 17–21 Oct. 2018; R.F. Ferreira, A. Galleti, P.H. Martins and V. Ghirotto leg.; CAD 833 • 1 ♀; Diamantina, Campus JK ; 18°14′56″ S, 43°36′0″ W; 7 Mar. 2010; W.F. Silva leg.; CAD 27 • 1 ♂; São Gonçalo do Rio Preto, Parque Estadual do Rio Preto ; 18°10′29.97″ S, 43°20′41.25″ W; 20–25 Oct. 2010; G. Monteiro, F. Sá, W.F. Silva and J.P.L. Guadanucci leg.; CAD 275 • 1 ♀; São Gonçalo do Rio Preto, Parque Estadual do Rio Preto ; 14 Jan. 2010; J.P.L. Guadanucci, W.F. Silva, D. Moura, R. F. Ferreira and D. Weinmann leg.; CAD 14 • 1 ♂; Belo Horizonte, Campus UFMG ; 19°52′19″ S, 43°57′58″ W; 27 Nov. 1999; E.S.S. Álvares leg.; UFMG 606 • 2 ♂♂; Belo Horizonte, Campus UFMG ; 10–25 Sep. 2000; E.S.S. Álvares leg.; UFMG 607 • 1 ♂; Belo Horizonte, Campus UFMG ; 30 Aug. 2000; E.S.S. Álvares leg.; UFMG 608 • 2 ♂♂; Belo Horizonte, Campus UFMG ; 26 Sep. 2009; I.L.F. Magalhães leg.; UFMG 3211 • 1 ♂; Belo Horizonte, Reserva Biológica UFMG ; IBSP 14488 • 1 ♂; Belo Horizonte, Campus UFMG , Centro Pedagógico UFMG ; Jul. 2002; C. Torres leg.; IBSP 13659 . – São Paulo • 1 ♂; Araraquara ; 21°47′38″ S, 48°10′33″ W; 30 Sep. 1988; IBSP 9562 • 1 ♂; Ribeirão Preto ; 21°10′40″ S, 47°48′36″ W; 24 Nov. 2004; IBSP 12337 • 1 ♂; Santo Antônio do Aracanguá ; 20°56′13″ S, 50°29′45″ W; IBSP 14314 • 1 ♂; São Paulo, Parque dos Príncipes ; 23°25′ S, 46°37′ W; IBSP 13324 • 1 ♂; Rio Pequeno ; 23°33′ S, 46°43′ W; IBSP 3346 • 1 ♂; São Roque ; 23°31′44″ S, 47°08′06″ W; 2 Aug. 2011; A.B. Canute leg.; IBSP 9133 .

Emended description

Male and female recently described by Fukami & Lucas (2005). New data on the male and female are included here:

Male ( UFMG 607)

HABITUS. See Fig. 27A .

COLOR. Carapace with dark brown spots on anterior half, mainly on cephalic area near eyes ( Fig. 27A ).

PROSOMA. Carapace and ocular arrangement as shown in Fig. 27A . Eye tubercle: 0.6 long; 1 wide. AME-ALE distance 0.8. Basal segment of chelicerae with a prolateral row of 6 large teeth and 4 small retrolateral teeth, grouped in basal half ( Fig. 28A ); rastellum presenting 12 spines of same size ( Fig. 28B ).

LEGS. Tibia, metatarsus and tarsus I as shown in Fig. 27G . Pseudoscopula: on tarsus I divided into rows of strong setae; tarsus II–IV totally covered.

PALP. Tibia with expansion of basal half of retrolateral depression ( Figs 27C , 28D ). Palpal bulb with short embolus with a strongly inclined basal portion and incomplete subapical torsion ( Fig. 27D–F ).

SPINATION. Palp: Ti r24, Ta d0-0-4. Leg I: Fe d1-1-2, Ti v1r-1r-2r, Mt 1r-2r-1, 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 ( UFMG 11264)

HABITUS. See Fig. 27J .

MEASUREMENTS. TBL 19.1, CL 9.8, CW 8.8, LL 1.5, LW 1.8, SL 5.4, SW 4.8.

COLOR. Similar to that of male, except sternum and coxae brownish and dark gray abdomen ( Fig. 27J–K ).

PROSOMA. Carapace and ocular arrangement as shown in Fig. 27J . Eye tubercle: 2.2 long; 1.9 wide. AME-ALE distance 1.4. Eye diameters: AME 0.4, ALE 0.5, PME 0.3, PLE 0.6. Thoracic fovea procurved ( Fig. 27J ). Labium with 6 cuspules ( Fig. 27K ). Maxilla with 92 cuspules, distributed over anterior ventral half, with 15 large cuspules at anterior prolateral end and 18 large cuspules at anterior retrolateral end ( Fig. 27K ). Basal segment of chelicerae with a prolateral row of 6 large teeth and a retrolateral row with 3 small teeth, grouped in basal third, rastellum presenting 22–24 spines of same size ( Fig. 27K ).

PALP AND LEG MEASUREMENTS. Palp = 14.4 (4.8, 3.1, 3.2, 3.3), I = 16.4 (5.3, 3.6, 3.6, 2.6, 1.3), II = 14.7 (4.8, 3.4, 2.9, 2.4, 1.2), III = 15.1 (4.1, 3.5, 2.4, 3.1, 2), IV = 20.3 (5.4, 4.1, 4.4, 4.2, 2.2).

SPINATION. Palp: Ti p5-12-13, r7-12-14, Ta v0-0-3, p12-10-8, r12-14-8. Leg I: Ti p5-7-8, r7-8-12, Mt p12-9-11, r11-10-9, Ta v0-0-6, p5-4-2, r5-4-2. Leg II: Ti p3-6-6, r1-3-3, Mt p12-9-12, r5-5-6, Ta v0-0-5, p7-4-3, r6-3-1. Leg III: Pa p3-4-8, r0-0-3, Ti v1-1-1, p2-3-6, r0-2-4, Mt v2-2-2, p6-2-2, r8-1-2, Ta v0-6- 15. Leg IV: Pa p37-4-0, Ti v1-1-2, Mt v2-2-2, Ta v2-4-13.

SPERMATHECAE. Ducts with non-sclerotized basal region, thicker than apical portion; sclerotized apical portion; spherical and non-sclerotized receptacula, with evident granules ( Fig. 27L ).

Distribution

Brazil. Widely distributed, with areas in the phytophysiognomies of the Amazon, Caatinga and Cerrado. Records for Central-West region (Distrito Federal and Goiás), North region (Amazonas, Amapá, Pará and Rondônia), Northeast region (Bahia, Maranhão, Paraíba, Piauí and Sergipe) and Southeast region (Minas Gerais and São Paulo) ( Fig. 4C ).

Figures

Fig. 2. Live habitus of Idiops Perty, 1833. A. I. fuscus Perty, 1833, ♀. B. I. fuscus, ♂. C. I. camelus (Mello-Leitão, 1937), ♀. D. I. camelus, ♂. E. I. pirassununguensis Fukami & Lucas, 2005, ♀. F. I. pirassununguensis, ♂. Images by: Leonardo S. Carvalho (A–B); Rafael P. Indicatti (C–D); Pedro H. Martins (E–F).

Fig. 4. Distribution of species of Idiops Perty, 1833 in the Neotropical region (part).

Fig. 6. Diagnostic characters of Idiops Perty, 1833 spp. A. Ocular disposition, with emphasis on the anterior lateral eyes apart from the others (I. fuscus Perty, 1833, CHNUFPI 0036). B. Rows of chelicera teeth (I. clarus(Mello-Leitão, 1946), FCE 0340). C. Rastellum (I. carajas Fonseca-Ferreira, Zampaulo & Guadanucci, 2017, MPEG 00109). D. Tarsus showing the pseudoscopula and tarsal claws (I. camelus (Mello-Leitão, 1937), MZSP 28832).E. Palpal bulb (I. carajas). F. Retrolateral depression of palpal bulb (I. rastratus (O. Pickard-Cambridge, 1889), MZSP 24215). G. Tibial apophysis (I. pirassununguensis Fukami & Lucas, 2005, MZSP 15651). H–I. Putative slit organ between the branches of the tibial apophysis (I. camelus). Abbreviations: PT = promarginal teeth; RT = retromarginal teeth. Scale bars: A–D, F– G = 0.5 mm; E = 1 mm; H–I = 0.05 mm.

Fig. 27. Idiops pirassununguensis Fukami & Lucas, 2005. A–I. ♂ (UFMG 607). 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). J–L. ♀ (UFMG 11264). J. Prosoma, dorsal view. K. Prosoma, ventral view. L. Genitalia (dorsal view). Abbreviation: EL = embolar lamella. The arrow indicates a constriction. Scale bars = 1 mm.

Fig. 28. Scanning electron micrographs of Idiops pirassununguensis Fukami & Lucas, 2005, ♂ (MZSP 15651). 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. Dorsal view. F. Prolateral view. Abbreviation: EL = embolar lamella. Scale bars: A–D = 0.5 mm; E–F = 0.2 mm.