Idiops guri Fonseca-Ferreira, Guadanucci & Brescovit, 2021

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 : 36-40

Idiops guri Fonseca-Ferreira, Guadanucci & Brescovit sp. nov.

urn:lsid:zoobank.org:act:A7664A49-43C0-4157-BC48-B98BFB58252B

Figs 3C , 20–21

Diagnosis

The male of Idiops guri sp. nov. differs from those of other Neotropical species by having the palpal tibia with the retrolateral depression shallow and delimited by spines of decreasing lengths towards the apical portion ( Figs 20C , 21D ) and by the presence of a hook-shaped projection near the sperm duct opening in retroventral view ( Fig. 21E–F ). The female differs from the other species by the horseshoe-shaped spermathecae, with ducts curved inward and with sclerotization at the transition between the duct and the receptacle, and oval and weakly sclerotized receptacles ( Fig. 20L ).

Etymology

The specific epithet is a tribute to southern Brazil, the region where the species is distributed. The word ʻguriʼ, which is of Tupi-Guarani origin, is commonly used in the region to refer to a child or a lad. It also alludes to the tiny size of the specimens.

Type material

Holotype BRAZIL – Rio Grande do Sul • ♂; São Francisco de Paula, Cento de Pesquisas e Conservação da Natureza Pró Mata ; 29°27′– 29°35′ S, 50°08′– 50°15′ W; 1 May 2001; R. Ott leg.; MCN 39594 .

Paratypes BRAZIL – Paraná • 1 ♂; Londrina, Parque dos Godoy ; 23°26′ S, 51°15′ W; 5 Jan. 1999; J. Lopes and I.M. Madri leg.; MCTP 11840 . – Santa Catarina • 1 ♂; Chapecó, Floresta Nacional de Chapecó ; 27°06′10.5″ S, 52°46′48.8″ W; 10 Mar. 2004; M. Scartezini leg.; IBSP 126721 . – Rio Grande do Sul • 1 ♂; Viamão, Parque Estadual de Itapuã ; 30°22′6″ S, 50°59′52″ W; 28 May 2004; A.C.K. Ferreira et al. leg.; MCTP 16937 .

Other material examined

BRAZIL – Paraná • 2 ♂♂ (SEM); Cornélio Procópio, Parque Estadual Mata São Francisco ; 28°08′47.3″ S, 50°34′19.5″ W; 2009; J.L. Chavari leg.; IBSP 220523 • 1 ♂; Cornélio Procópio, Parque Estadual Mata São Francisco ; 8 May 2009; N.G. Cipola leg.; IBSP 150273 • 1 ♂; Londrina, Parque dos Godoy ; 23°26′ S, 51°15′ W; 13 Apr. 1999; J. Lopes and I.M. Madri leg.; MCTP 11815 • 1 ♂; Londrina, Parque dos Godoy ; 16 Mar. 1999; J. Lopes and I.M. Madri leg.; MCTP 11816 • 2 ♂♂; same collection data as for preceding; MCTP 11820 • 1 ♂; Londrina, Parque dos Godoy ; 30 Mar. 1999; J. Lopes and I.M. Madri leg.; MCTP 11817 • 1 ♂; Ponta Grossa, Parque Estadual de Vila Velha ; 25°14′17″ S, 50°0′39″ W; 22 Nov. 1986; Equipe Profaupar leg.; MCN 20668 • 2 ♂♂, 1 juv.; Três Barras do Paraná, Foz do Córrego Três Barras ; 25°25′8″ S, 53°10′51″ W; 24 Feb.–24 Mar. 1993; A.B. Bonaldo leg.; MCN 23420 . – Santa Catarina • 1 ♂; Chapecó, Floresta Nacional de Chapecó ; 27°06′10.5″ S, 52°46′48.8″ W; 10 Mar. 2004; M. Scartezini leg.; IBSP 126735 • 2 ♂♂; same collection data as for preceding; IBSP 126732 • 2 ♂♂; same collection data as for preceding; IBSP 126729 • 8 ♂♂; same collection data as for preceding; IBSP 126723 to 126724 , IBSP 126726 to 126728 , IBSP 126730 to 126731 , IBSP 126733 . – Rio Grande do Sul • 2 ♀♀; São Francisco de Paula; Potreiro Velho ; 29°26′52″ S, 50°35′2″ W; Feb. 2002; L. Bertocello; MCTP 17532 , MCTP 23469 • 1 ♀; São Francisco de Paula, Centro de Pesquisas e Conservação da Natureza Pró-Mata ; 29°27′– 29°35′ S, 50°08′– 50°15′ W; 18 May 2002; R. Ott leg.; MCTP 18549 • 2 ♂♂; Itaara ; 29°36′36″ S, 53°45′54″ W; Apr. 2017; A.A. Lise leg; MCTP 20798 to MCTP 20799 • 1 ♂, 1 juv.; São Francisco de Paula, Centro de Pesquisas e Conservação da Natureza Pró-Mata ; 1 May 2001, R. Ott leg.; MCN 39594a • 2 ♂♂, São Francisco de Paula, Centro de Pesquisas e Conservação da Natureza Pró-Mata ; 3 Feb. 2001; R. Ott leg.; MCN 39593 • 1 ♂; Derrubadas, Parque Estadual do Turvo ; 27°8′44″ S, 53°53′10″ W; 7 May 2004; R. Ott leg.; MCN 40380 • 3 ♂♂; Morrinhos do Sul, Tres Passos ; 29°21′54″ S, 49°56′6″ W; 1 Nov. 2006; A. Gonçalves et al. leg.; MCN 52357 to 52358 • 1 ♂; Dom Pedro de Alcântara ; 29°22′8″ S, 49°51′0″ W; 25 Apr. 2006; A. Gonçalves et al. leg.; MCN 52356 • 2 ♂♂; Viamão, Parque Estadual de Itapuã ; 30°22′6″ S, 50°59′52″ W; 15 Apr. 2004; A.C.K. Ferreira et al. leg.; MCTP 16939 , MCTP 16946 • 2 ♂♂; same collection data as for preceding; MCTP 16948 • 14 ♂♂; Viamão, Parque Estadual de Itapuã ; 30 Apr. 2004; A.C.K. Ferreira et al. leg.; MCTP 16638 • 12 ♂♂; same collection data as for preceding; MCTP 16936 • 1 ♂; Viamão, Parque Estadual de Itapuã ; 18 Apr.–8 May 2007; R. Moraes leg.; MCTP 29969 • 2 ♂♂; Porto Alegre, Reserva Biológica de Lami ; 30°15′ S, 51°05′ W; 23 Mar.–2 Apr. 2006; MCN 46338 • 1 ♂; Porto Alegre, Reserva Biológica de Lami ; 23 Mar.–12 Apr. 2006; R. Moraes leg.; MCN 56824 • 4 ♂♂; Porto Alegre, Jardim Botânico ; 5 Mar.–5 Apr. 2013; G.O. Silva leg.; MCN 49909 to 49911 ; MCN 49913 • 1 ♂; Herval ; 32°1′26″ S, 53°23′45″ W; 27–28 Apr. 2013; Equipe Sisbiota leg.; MCN 48527 .

Description

Male (holotype MCN 39594)

HABITUS. See Fig. 20A .

MEASUREMENTS. TBL 5.3, CL 2.5, CW 2.4, LL 0.4, LW 0.6, SL 1.4, SW 1.3.

COLOR. Yellowish brown carapace and legs, gray abdomen ( Fig. 20A–B ).

PROSOMA. Carapace and ocular arrangement as shown in Fig. 20A . Eye tubercle: 0.4 long; 0.5 wide. AME-ALE distance 0.3. Eye diameters: AME 0.1, ALE 0.2, PME 0.1, PLE 0.12. Thoracic fovea procurved ( Fig. 20A ). Labium and sternum without cuspules ( Fig. 20B ). Basal segment of chelicerae with a prolateral row of 5 small teeth equally distributed, rastellum with 11–12 spines, distals largest ( Fig. 21A–B ).

LEGS. Tibia, metatarsus and tarsus I as shown in Fig. 20G . Tibial apophysis of leg I with short basal branch with small triangular spine and apical branch twice as large as basal branch ( Fig. 20G–I ), with elongated spine in digitiform shape ( Fig. 21C ). Pseudoscopula: tarsus I–IV totally covered.

PALP. Tibia with larger spines arranged on basal half of retrolateral depression ( Fig. 20C ), embolus with keel in retrolateral view, embolus with subapical torsion, followed by lateral lamella close to opening of sperm duct ( Figs 20D–F , 21E–F ).

PALP AND LEG MEASUREMENTS. Palp = 3.8 (1.2, 0.6, 1.4, 0.6), I = 7.5 (2.2, 1.2, 1.7, 1.4, 1), II = 6.8 (2.2, 1, 1.4, 1.2, 1), III = 6.2 (1.7, 1, 1, 1.5, 1), IV = 8 (1.9, 1, 2, 1.9, 1.2).

SPINATION. Palp: Ti r13. Leg I: Pa v0-0-1, Ti r0-1-2 Mt v0-0-1, p0-0-1, r1-1-2, Ta p0-0-1 r0-1-0. Leg II: Pa v0-0-3, Ti v1-1-3, p0-0-2, Mt v1-1-3, p0-0-1, Ta p0-0-1. Leg III: Pa p1-2-2, Ti v0-0-2, p0-1-1, r0- 0-1, Mt v0-1-2, p0-1-2, r0-1-2, d0-1-2. Leg IV: Pa 0-0-1, Ti v1-1-2, p0-0-1, r0-0-1, Mt v0-1-2, p0-0-1, r0-0-2, Ta p0-0-1, r0-0-1.

Female (MCTP 23469)

HABITUS. See Fig. 20J .

MEASUREMENTS. TBL 8.4, CL 4.2, CW 3.7, LL 0.7, LW 0.9, SL 2.5, SW 2.5.

COLOR. Brown carapace and legs, gray abdomen ( Fig. 20J–K ).

PROSOMA. Carapace and ocular arrangement as shown in Fig. 20J . Eye tubercle: 0.5 long; 0.9 wide. AME-ALE distance 0.7. Eye diameters: AME 0.2, ALE 0.3, PME 0.2, PLE 0.3. Thoracic fovea procurved ( Fig. 20J ). Labium with 4 cuspules ( Fig. 20K ). Maxilla with 29 cuspules, distributed over anterior ventral half, with 8 large cuspules at anterior ventral retrolateral end and 5 large cuspules at anterior ventral prolateral end ( Fig. 20K ). Basal segment of chelicerae with a prolateral row of 5 large teeth. Rastellum with 11–12 thick spines, distals largest.

PALP AND LEG MEASUREMENTS. Palp = 6.9 (2.5, 1.3, 1.5, 1.6), I = 7.7 (2.5, 1.6, 1.8, 1, 0.8), II = 6.6 (2.2, 1.4, 1.2, 1.1, 0.7), III = 7.3 (2, 1.6, 1.2, 1.5, 1), IV = 9.7 (2.6, 2, 1.8, 2, 1.3).

SPINATION. Palp: Ti r5-4-5, p2-4-6, Ta r4-6-6, p7-6-5. Leg I: Mt r3-4-5, p2-3-3, Ta v0-0-3, r5-4-6, p2-4-2. Leg II: Ti r2-3-3, p2-4-2, Mt r6-4-5, p5-5-5, Ta v0-0-3, r3-2-1, p2-4-2. Leg III: Pa p3-5-8, Ti p0-2-3, Mt d2-4-4, v1-2-2, p4-2-1, Ta v0-1-3, p0-2-0. Leg IV: Pa p12-0-0, Ti v1-1-1, Mt v1-2-2, p0-0-1, Ta v0-3-4.

SPERMATHECAE. Duct with translucent median portion and receptacle with evident granules and medial half slightly expanded ( Fig. 20L ).

Distribution

Brazil. Found mainly in Atlantic Forest phytophysiognomies, with records for the South region (Paraná, Santa Catarina and Rio Grande do Sul) ( Fig. 3C ).

Figures

Fig. 3. Distribution of species of Idiops Perty, 1833 in the Neotropical region (part).

Fig. 20. Idiops guri Fonseca-Ferreira, Guadanucci & Brescovit sp. nov. A–I. ♂, holotype (MCN 39594). 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. ♀ (MCTP 23469). J. Prosoma (dorsal view). K. Prosoma (ventral view). L. Genitalia (dorsal view). Abbreviations: EL = embolar lamella; K = keel. Scale bars: A–G, I–L = 1 mm; H = 0.5 mm.

Fig. 21. Scanning electron micrographs of Idiops guri Fonseca-Ferreira, Guadanucci & Brescovit sp. nov., ♂ (IBSP 220523). 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 in prolateral view. Abbreviation: EL = embolar lamella. The arrow indicates the hook-shaped projection near the sperm duct. Scale bars: A = 0.4 mm; B, E–F = 0.2 mm; C = 0.3 mm; D = 1 mm.