Idiops opifex ( Simon, 1889 )

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 : 46-47

Idiops opifex ( Simon, 1889)

Figs 4B , 25

Pseudidiops opifex Simon, 1889: 215 , pl. 1 fig. 3.

Idiops opifex – Raven 1985: 139. — Dupérré & Tapia 2021: 274 , figs 16a–b, 17a–b.

Diagnosis

The female of Idiops opifex differs from that of all other Neotropical species of the genus, except I. rastratus and I. duocordibus sp. nov., by presenting cuspules on the entire maxillae ventral face. Differs from I. rastratus by the non-sclerotized spermathecae base ( Fig. 25A ) and from I. duocordibus sp. nov. by the spherical receptacula ( Fig. 25 ).

Type material

Holotype FRENCH GUIANA • ♀; Cayenne ; MNHN 5340 . The holotype is damaged, apparently smashed.

Description

Male

Unknown.

Female (holotype MNHN 5340)

Measurements. TBL 11, CL 5.4, CW 5.2, LL 0.9, LW 1.3, SL 2.9, SW 3.3.

COLOR. Carapace and legs brown. Abdomen dark gray.

PROSOMA. Eye tubercle: 1.7 long; 1.8 wide. AME-ALE distance 1. Eye diameters: AME 0.3, ALE 0.3, PME 0.2, PLE 0.4. Thoracic fovea procurved. Labium with 23 cuspules. Sternum destroyed. Maxilla with 160 cuspules, distributed through ventral area. Basal segment of chelicerae with a prolateral row of 5 large teeth and 4 small retrolateral basal teeth.

PALP AND LEG MEASUREMENTS. Palp = 10.6 (3.6, 2.3, 2.5, 2.2), I = 11.6 (3.8, 2.7, 2.6, 1.8, 0.7), II = 10 (3.4, 2.4, 2, 1.6, 0.6), III = 10.7 (3.3, 2.4, 1.8, 2, 1.2), IV = 14.1 (4.4, 2.8, 3, 3.7, 1.2).

SPINATION. Palp: Fe p0-0-3, Pa p0-1-0, Ti p7-9-9, Ta v0-0-2, p11-10-8, r12-9-7. Leg I: Ti p5-7-11, r4-4- 5, Mt p9-7-6, r9-5-6, Ta v0-0-3, p5-2-1, r5-2-0. Leg II: Pa r0-0-1, Ti p3-5-5, r2-3-3, Mt p10-9-5, r5-4-3, Ta p3-3-1, r3-1-0. Leg III: Pa p2-3-9, r0-0-1, Ti v0-0-2, p4-4-10, r3-4-8, Mt v0-0-2, p4-4-6, r2-0-0, Ta v0-0-6. Leg IV: Pa p8-2-0, Mt v1-1-1-3, Ta v0-0-6.

SPERMATHECAE. Duct length similar to diameter of spherical receptacles, close to each other, with basal half thicker than apical half and with sclerotization at transition between duct and receptacle ( Fig. 25 ).

Distribution

French Guyana. Know only from type locality ( Fig. 4B ).

Figures

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

Fig. 25. Idiops opifex (Simon, 1889), ♀, genitalia, holotype (MNHN 5340). A. Dorsal view. B. Frontal view. Scale bar = 1 mm.