Idiops nilopolensis Mello-Leitão, 1923

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 : 43-46

publication ID	https://doi.org/ 10.5852/ejt.2021.780.1581
publication LSID	lsid:zoobank.org:pub:932663A6-D83D-49E0-B1F7-87F7DA8DC086
DOI	https://doi.org/10.5281/zenodo.5762241
persistent identifier	https://treatment.plazi.org/id/03B4126E-E847-FF82-EE7F-FC72FB7EFEA5
treatment provided by	Felipe
scientific name	Idiops nilopolensis Mello-Leitão, 1923
status

Treatment

Idiops nilopolensis Mello-Leitão, 1923 View in CoL

Figs 3D View Fig , 24A–L View Fig

Idiops nilopolensis Mello-Leitão, 1923: 47 View in CoL .

Idiops nilopolensis View in CoL – Bücherl et al. 1971: 121, figs 6–7. — Fukami & Lucas 2005: 7.

Diagnosis

Males of Idiops nilopolensis differ from those of other Neotropical species by the strong curvature of the median portion of the embolus in dorsal view ( Fig. 24D–F View Fig ; also present in I. fuscus ). Differs from I. fuscus by having the embolus with a thickened basal half and by the small embolar lamella (smaller than in I. fuscus ) close to spermatic duct opening ( Fig. 24D–F View Fig ). The female differs from those of other species by having the spermathecae with a translucent duct and without constriction between the duct and the sclerotized receptacles ( Fig. 24L View Fig ).

Type material

Holotype BRAZIL – Rio de Janeiro • ♀; Rio de Janeiro ; Nov. 1923; H. Blanc de Freitas leg.; MNRJ 10 View Materials . Lost before the 2018 fire ( Moreira et al. 2010: 34).

Neotype (here designated) BRAZIL – Rio de Janeiro • ♂; Nova Iguaçu, Parque Municipal de Nova Iguaçu ; 22°45′35′′ S, 43°27′6′′ W; 21 Jul. 2004; R. Baptista leg.; MNRJ. GoogleMaps

Remark: The type specimen of Idiops nilopolensis was lost in the MNRJ long before the 2018 fire. 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 stabilise the species. This neotype is based on a specimen collected near the type locality, in the state of Rio de Janeiro, Brazil.

Other material examined

BRAZIL – Rio de Janeiro • 1 ♀; same locality as for neotype; 1 Nov. 2004; MNRJ GoogleMaps .

Description

Male (neotype MNRJ)

HABITUS. See Fig. 24A View Fig .

MEASUREMENTS. TBL 16.9, CL 7.3, CW 6.4, LL 0.6, LW 1.2, SL 3.9, SW 3.5.

COLOR. Body uniformely light brown ( Fig. 24A–B View Fig ).

PROSOMA. Carapace and ocular arrangement as shown in Fig. 24A View Fig . Eye tubercle: 0.8 long; 1 wide. AME-ALE distance 0.9. Eye diameters: AME 0.4, ALE 0.4, PME 0.2, PLE 0.4. Thoracic fovea procurved ( Fig. 24A View Fig ). Labium and sternum without cuspules ( Fig. 24B View Fig ). Basal segment of chelicerae with a prolateral row of 7 large teeth and 3 small retrolateral teeth, grouped on basal half, rastellum with 16–18 spines, the distal ones longer.

LEGS. Tibia, metatarsus and tarsus I as shown in Fig. 20G View Fig . Leg I with double tibial apophysis. Apical branch twice the size of basal branch and with a conspicuous spine ( Fig. 24H–I View Fig ). Pseudoscopula: tarsus I–IV totally covered.

PALP. Tibia with retrolateral conspicuous depression and spines concentrated at basal and apical portions ( Fig. 24C View Fig ); embolus with basal torsion and opening of sperm duct in shape of a quill tip ( Fig. 24D–E View Fig ).

PALP AND LEG MEASUREMENTS. Palp = 11.8 (4.3, 2.2, 3.8, 1.5), I = 28.4 (8.5, 3.8, 6.6, 6.7, 2.8), II = 26.9 (7.8, 3.4, 6, 6.3, 3.1), III = 23.7 (6.1, 3.3, 4.3, 6.4, 3.6), IV = 32.6 (8.4, 3.7, 7.9, 8.6, 4).

SPINATION. Palp: Ti r20, Ta d0-0-1. Leg I: Mt p0-0-2, r2-2-4, Ta p2-2-2, r3-3-4. Leg II: Mt p0-0-2, r0-3-3, Ta p2-3-3, r3-4-5. Leg III: Fe d2-1-1, Pa p2-4-5, Ti d2-2-1, v1-2-2, p4-4-6, Mt d2-2-5, v3-4-5, p3-4-6, r2-2-4, Ta p3-4-2, r3-3-6. Leg IV: Ti v1-2-3, p0-0-1, Mt v2-4-6, p1-2-4, Ta p1-4-6.

Female (MNRJ)

HABITUS. See Fig. 24J View Fig .

MEASUREMENTS. TBL 15.7, CL 6.2, CW 5.7, LL 0.9, LW 1.3, SL 3.9, SW 3.4.

COLOR. Brown carapace and legs, brownish sternum and coxae ( Fig. 24J–K View Fig ), gray abdomen.

PROSOMA. Carapace and ocular arrangement as shown in Fig. 24J View Fig . Eye tubercle: 1.2 long; 0.8 wide. AME-ALE distance 1. Eye diameters: AME 0.2, ALE 0.3, PME 0.2, PLE 0.4. Thoracic fovea procurved ( Fig. 24J View Fig ). Labium with 2 cuspules ( Fig. 24K View Fig ). Maxilla with 48 cuspules, distributed over anterior ventral half, with 6 large cuspules at anterior ventral retrolateral end and 6 large cuspules at anterior ventral prolateral end ( Fig. 24K View Fig ). Basal segment of chelicerae with a prolateral row of 7 large teeth and 5 small retrolateral teeth, grouped on basal half, rastellum with 22 short and thick spines ( Fig. 24K View Fig ).

PALP AND LEG MEASUREMENTS. Palp = 11.4 (4, 2.4, 2.4, 2.6), I = 12.2 (3.7, 2.8, 2.6, 1.7, 1.4), II = 11.4 (3.6, 2.5, 2.3, 1.6, 1.4), III = 13.6 (4.1, 2.5, 2.2, 2.1, 2.7), IV = 15.7 (4.4, 3.1, 3.1, 3.2, 1.9).

SPINATION. Palp: Ti p4-10-12, r4-6-8, Ta p6-8-7, r10-13-9. Leg I: Ti v0-2-2, p4-5-6, r1-3-9, Mt v2-2-3, p6-6-9, r4-3-5, Ta v0-0-3, p2-3-3, r4-3-5. Leg II: Fe v0-0-2, Pa v0-0-1, Ti v1-1-2, p4-5-6, r0-0-1, Mt v1- 2-1, p4-6-9, r1-2-1, Ta v0-1-3, p4-4-4, r4-4-2. Leg III: Pa d0-0-2, Ti p2-3-2, r0-0-3, Mt v0-0-1, r3-1-1, 4-4-3, Ta v0-4-3, p0-2-3. Leg IV: Fe d0-0-2, v0-0-3, Ti v1-1-3, Mt v3-4-6, p1-2-3, Ta v3-3-4, p1-2-3.

SPERMATHECAE. Short and narrow sclerotized base, ducts with same width as receptacles ( Fig. 24L View Fig ).

Distribution

Brazil. Found in Atlantic Forest phytophysiognomie in the state of Rio de Janeiro ( Fig. 3D View Fig ).