Idiops fuscus Perty, 1833

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: 11-15

publication ID

http://doi.org/ 10.5852/ejt.2021.780.1581

publication LSID

lsid:zoobank.org:pub:932663A6-D83D-49E0-B1F7-87F7DA8DC086

DOI

http://doi.org/10.5281/zenodo.5762225

persistent identifier

http://treatment.plazi.org/id/03B4126E-E867-FFA1-EECE-FEE2FB7DFB03

treatment provided by

Felipe

scientific name

Idiops fuscus Perty, 1833
status

 

Idiops fuscus Perty, 1833  

Figs 2A–B View Fig , 4C View Fig , 6A View Fig , 7–8 View Fig View Fig

Idiops fusca Perty, 1833: 197   , pl. 39 fig. 5 (♂).

Sphasus idiops   – Walckenaer 1837: 379 (new name for Idiops aculeatus   – lapsus). — Petrunkevitch 1911: 780.

Idiops aculeatus   – Walckenaer 1837: 379 (lapsus). — Petrunkevitch 1911: 775.

Idiops fuscus   – O. Pickard-Cambridge 1870: 103. — Simon 1892: 92, fig. 91.

Diagnosis

Males of I. fuscus   ( Figs 7A–I View Fig ) differ from other Neotropical species of the genus, except I. clarus   and I. pirassununguensis   , by having palpal tibia with a prominent projection at the base of the retrolateral depression ( Fig. 7C View Fig ). Differs from I. clarus   and I. pirassununguensis   by the strong curvature of the median portion of the embolus in dorsal view (also present in I. nilopolensis   ). Differs from I. nilopolensis   by the distal portion of the embolus having a pronounced embolar lamella with differentiated dorsal and ventral edges (also present in I. rastratus   ) ( Figs 7D–F View Fig , 8E–F View Fig ). The females differ from other Neotropical species by the aspect of the spermathecae, composed of two ducts slightly curved outward, with a soft and nonsclerotized basal portion and a median and apical portion strongly sclerotized and by the receptacula with a much larger diameter than the duct width ( Fig. 7L View Fig ).

Type material

Holotype BRAZIL – Piauí • MNHN. Should be in the MNHN, lost.  

Neotype (here designated) BRAZIL – Piauí • ♂; Bom Jesus, Reserva Natural Serra do Teimoso ; 8°52′52.6″ S, 44°58′12″ W; 12 Jul.– 2 Aug. 2000; F. Curcioi and M. Pixo leg.; IBSP 11887 View Materials . GoogleMaps  

Remark: Despite an intensive search, the type specimen of Idiops fuscus   was not found in the MNHN, being considered lost. In accordance with the criteria of the ICZN Code ( ICZN 1999), a neotype is designated here, because the type is lost and the original description is inadequate to stabilize the species. This neotype was based on a specimen collected near the type locality, in the state of Piauí, Brazil.

Other material examined

BRAZIL – Maranhão • 1 ♂; Carolina, Campus Hotel Rilton   ; 7°19′58″ S, 47°28′8″ W; 10 Dec. 2005; UFMT GoogleMaps   . – Piauí • 1 ♀; São Raimundo Nonato ; 9°0′54″ S, 42°41′56″ W; 6 Dec. 1994; R. Bertani and D. Pinz leg.; IBSP 9574 View Materials GoogleMaps   3 ♂♂ ( SEM); União, Campus OMVAPI Ltda ; 4°35′9″ S, 42°51′50″ W; 2006; J. Queiroz et al. leg.; CHNUFPI 0036 GoogleMaps   2 ♂♂; same collection data as for preceding; CHNUFPI 0030, CHNUFPI 0038 GoogleMaps   1 ♂; Guaribas, Parque Nacional da Serra das Confusões ; 9°12′55.5″ S, 43°29′.1″ W; 14 Dec. 2010; F.S. Silva leg.; CHNUFPI 4033 GoogleMaps   1 ♂; Guaribas, Parque Nacional da Serra das Confusões ; 9°13′12.3″ S, 43°29′26.7″ W; 9–15 Dec. 2010; L.S. Carvalho leg.; CHNUFPI 4034 GoogleMaps   1 ♂; Guaribas, Parque Nacional da Serra das Confusões ; 9°13′32.4″ S, 43°27′46.9″ W; 10 Dec. 2010; F.S. Silva leg.; CHNUFPI 4032. – GoogleMaps   Ceará • 1 ♂; Crato, Parque Estadual Sítio do Fundão ; 7°13′3″ S, 39°20′21″ W; May 2016; IBSP 218297 View Materials . – GoogleMaps   Pernambuco • 2 ♂♂; Caruaru, Brejo ; 8°16′58″ S, 35°58′33″ W; Nov. 2010; H. Amorin leg.; IBSP 243978 View Materials , IBSP 243980 View Materials GoogleMaps   • 1 ♂; Serra Talhada ; 7°59′9″ S, 38°17′45″ W; Nov. 2010; H. Amorin leg.; IBSP 243979 View Materials . – GoogleMaps   Bahia • 1 ♀; Santa Inês, BR420 ; 13°15′48.7″ S, 39°47′2.8″ W; 18 Jun. 2018; P.H. Martins and E.A. Araújo leg.; UFMG 24028 View Materials GoogleMaps   • 1 ♀; Brumado, Magnesita ; 14°10′51.5″ S, 41°42′0.7″ W; 24 Feb. 2017; P. Martins leg.; UFMG 24029 View Materials . – GoogleMaps   Mato Grosso • 1 ♂; Chapada dos Guimarães ; 15°27′39″ S, 55°45′0″ W; 23 Mar. 2001; C. Strussmann leg.; MCTP 12212 View Materials . – GoogleMaps   Minas Gerais • 1 ♂; Itaobim ; 16º31′58.6″ S, 41º30′37.5″ W; 25 Nov. 2011; I.L.F. Magalhães et al. leg.; UFMG 10098 View Materials . – GoogleMaps   Mato Grosso do Sul • 4 ♂♂; Corumbá, Serra do Amolar ; 17°94′32″ S, 57°55′47″ W; 8–12 May 2001; C. Strussmann leg.; MCTP 12193 View Materials   1 ♀; Bonito ; 21°7′15″ S, 56°28′55″ W; Oct. 2002; C.A. Rheims leg.; IBSP 225943 View Materials GoogleMaps   1 ♂; Bonito, Abismo Anhumas ; 21°08′60″ S, 56°36′00″ W; Oct. 2002; C.A. Rheims leg.; IBSP 243976 View Materials GoogleMaps   2 ♂♂; same collection data as for preceding; IBSP 243974 View Materials GoogleMaps   3 ♂♂; same collection data as for preceding; IBSP 243975 View Materials GoogleMaps   .

Description

Male (neotype IBSP 11887)

HABITUS. See Fig. 7A View Fig .

MEASUREMENTS. TBL 11.2, CL 5.3, CW 5, LL 0.7, LW 1, SL 3, SW 2.7.

COLOR. Brown carapace and legs, light brown sternum and coxae ( Fig. 7A–B View Fig ), grayish brown abdomen.

PROSOMA. Carapace and ocular arrangement as shown in Fig. 7A View Fig . Eye distance AME-ALE 0.6. Eye diameters: AME 0.3, ALE 0.3, PME 0.2, PLE 0.3. Thoracic fovea procurved ( Fig. 7A View Fig ). Labium and sternum without cuspules ( Fig. 7B View Fig ). Basal segment of chelicerae with a prolateral row of 10 large teeth and a retrolateral row of 10 small teeth, grouped in basal half, rastellum with 10–12 spines, distal ones longer ( Fig. 8A–B View Fig ).

LEGS. Tibia, metatarsus and tarsus I as shown in Fig. 7G View Fig . Leg I with double tibial apophysis composed of a short, thickened basal branch with a small tapered spine and an apical branch composed of a base twice the size of the basal branch, a thickened apical spine followed by two smaller spines ( Figs 7H–I View Fig , 8C View Fig ). Pseudoscopula: tarsus I with apical half with weak coverage ( Fig. 7G View Fig ); tarsus II, III and IV fully covered.

PALP. Tibia with conspicuous retrolateral depression and spines distributed along margin ( Fig. 7C View Fig ); embolus with torsion in apical portion, followed by a pronounced lamella, with upper and lower edges with different sizes ( Figs 7D–F View Fig , 8E–F View Fig ).

PALP AND LEG MEASUREMENTS. Palp = 8.8 (3, 1.4, 3, 1.4), I = 22.1 (6.6, 3, 4.7, 5, 2.8), II = 18.9 (5.7, 2.5, 3.9, 4.4, 2.4), III = 16.6 (4.5, 2.3, 2.8, 4.6, 2.4), IV = 22.7 (5.9, 2.7, 5.2, 6, 2.9).

SPINATION. Palp: Ti r20, Ta d0-0-8. Leg I: Pa v0-0-4, Mt v0-12, Ta p0-1-1, r1-1-1. Leg II: Ti v0-1-1-2, Mt v1-2-1-3, Ta p1-1-2, r1-1-3. Leg III: Fe d1-2-2, Pa p3-2-4, r0 -0-4, Ti d0-1-0, v1-2-2, p1-1-4, r1-1-2, Mt v2-2-1-3, p1-1-1, r3-1-0, Ta p1-2-3, r0-1-1. Leg IV: Fe d1-1-2, Ti v1-1-3, Mt v1-1-1-3, Ta p1-1-4, r0-0-2.

Female (IBSP 9574)

HABITUS. See Fig. 7J View Fig .

MEASUREMENTS. TBL 18.9, CL 8.2, CW 6.9, LL 1.2, LW 1.5, SL 4.7, SW 4.

COLOR. Brown carapace and legs, light brown sternum and coxae ( Fig. 7J–K View Fig ), grayish brown abdomen.

PROSOMA. Carapace and ocular arrangement as shown in Fig. 7J View Fig . Eye tubercle: 1.75 long, 1.83 wide. Distance AME-ALE 1. Eye diameters: AME 0.4, ALE 0.4, PME 0.3, PLE 0.5. Thoracic fovea procurved ( Fig. 7J View Fig ). Labium with 7 cuspules ( Fig. 7K View Fig ). Maxilla with 56 cuspules, distributed over anterior ventral half ( Fig. 7K View Fig ). Basal segment of chelicerae with a prolateral row of 10 large teeth and a retrolateral row of 10 small teeth, grouped in basal half. Robust rastellum, presenting 18–20 short and thick spines on a tubercle.

PALP AND LEG MEASUREMENTS. Palp = 12.3 (4.2, 2.7, 2.8, 2.6), I = 13.6 (4.6, 2.9, 2.9, 2.3, 0.9), II = 12.95 (4.3, 2.9, 2.5, 2.2, 1), III = 13.8 (3.7, 3.1, 2.3, 2.9, 1.85), IV = 19.4 (5.4, 3.8, 4.1, 4, 2.1).

SPINATION. Palp: Fe p0-0-2, Pa p0-0-1, Ti p3-6-7, r3-5-12, Ta v0-0-7, p7-7-7, r11-9-7. Leg I: Ti p3-4-8, r3-6-12, Mt p9-6-5, r8-7-5, Ta v0-0-5, p4-3-2, r4-2-2. Leg II: Ti p3-3-5, r1-1-1, Mt p9-7-7, r3-3-2, Ta v0-0-3, p4-5-2, r3-1-0. Leg III: Pa p3-5-10, r0-0-2, Ti v0-0-2, p1-3-3, r0-2-6, Mt v1r-1r-2, p7-1-1, r7-2-1, Ta v0-3-8. Leg IV: Pa p17-0-0, Ti v1-1-1, Mt v1-1-1-3, Ta v0-3-8.

SPERMATHECAE. Duct with apical half thicker than its basal half, oval receptacula ( Fig. 7L View Fig ).

Distribution

Brazil. Widely distributed, occurring in areas with phytophysiognomies in the Caatinga and Cerrado. Records for Central-West region (Mato Grosso, Mato Grosso do Sul), Northeast region (Bahia, Ceará, Maranhão, Paraíba, Pernambuco and Piauí) and the northern part of Minas Gerais ( Fig. 4C View Fig ).

MNHN

France, Paris, Museum National d'Histoire Naturelle

MNHN

Museum National d'Histoire Naturelle

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Idiopidae

Genus

Idiops

Loc

Idiops fuscus Perty, 1833

Fonseca-Ferreira, Rafael, Guadanucci, José Paulo Leite, Yamamoto, Flávio Uemori & Brescovit, Antonio Domingos 2021
2021
Loc

Idiops fuscus

Simon E. 1892: 92
Pickard-Cambridge O. 1870: 103
1870
Loc

Sphasus idiops

Petrunkevitch A. 1911: 780
Walckenaer C. A. 1837: 379
1837
Loc

Idiops aculeatus

Petrunkevitch A. 1911: 775
Walckenaer C. A. 1837: 379
1837
Loc

Idiops fusca

Perty M. 1833: 197
1833