Idiops duocordibus 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 : 30-33

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.5762235

persistent identifier

https://treatment.plazi.org/id/03B4126E-E870-FF8F-ED38-FC3DFD4EFE83

treatment provided by

Felipe

scientific name

Idiops duocordibus Fonseca-Ferreira, Guadanucci & Brescovit
status

sp. nov.

Idiops duocordibus Fonseca-Ferreira, Guadanucci & Brescovit View in CoL sp. nov.

urn:lsid:zoobank.org:act:D3387D49-8B8B-42C0-ADB9-88D5A8A78B62

Figs 3B View Fig , 17A–L View Fig

Diagnosis

Males and females of Idiops duocordibus sp. nov. differ from the other Neotropical species by the light brown coxae and trochanters, contrasting with the brown body ( Fig. 17A–L View Fig ). The male resembles that of I. rohdei by the short metatarsus I with prolateral curvature and with a slight prolateral projection on the apical half ( Fig. 17I View Fig ), but differs by the tibial apophysis with a triangular apical branch twice the size of the basal branch ( Fig. 17G–H View Fig ) and by the weakly curved embolus ( Fig. 17D View Fig ). The female ( Fig. 17J–L View Fig ) differs from those of the other species by having the spermathecae with bilobed receptacles in the shape of a heart ( Fig. 17L View Fig ).

Etymology

The specific epithet refers to the heart-shaped receptacles of the female genitalia.

Type material

Holotype BRAZIL – Pará • ♂; Vitória do Xingu, Ilha Taboca ; 3°23′12.7″ S, 51°57′26.2″ W; 3 Nov. 2000; F. Oliveira leg.; MPEG 0124 View Materials . GoogleMaps

Paratypes BRAZIL – Pará • 1 ♂; Almeirim, Reserva de Itapeguara ; 0°32′04.9″ S, 52°48′14.8″ W; Dec. 2001; MPEG 0122 View Materials GoogleMaps 1 ♀; Arapari, Rio Tocantins , left bank; 4°52′23.6″ S, 49°31′39.5″ W; 14 Mar. 1984; W.L. Overal leg.; MPEG 0123 View Materials GoogleMaps .

Other material examined

BRAZIL – Amazonas • 1 ♂; Manaus, Reserva Florestal Adolpho Ducke ; 3°0′27″ S, 59°56′22.92″ W; 9 Sep. 1991; H. Höfer and T. Gasnier leg.; INPA 4592 View Materials GoogleMaps 1 ♂; Manaus, Reserva Florestal Adolpho Ducke ; 14–24 Jul. 1991; A.D. Brescovit leg.; MCN 21485. – Pará • 2 ♂♂; Vitória do Xingu, Ilha Taboca ; 3°23′12.7″ S, 51°57′26.2″ W; 23 Nov. 2000; F. Oliveira leg.; MPEG 0112 View Materials , MPEG 0114 View Materials GoogleMaps .

Description

Male (holotype MPEG 0124)

HABITUS. See Fig. 17A View Fig .

MEASUREMENTS. TBL 10, CL 4.6, CW 4, LL 0.5, LW 0.7, SL 2.4, SW 2.2.

COLOR. Carapace brown, light brown coxae and trochanter ( Fig. 17A–B View Fig ). Abdomen dark gray.

PROSOMA. Carapace and ocular arrangement as shown in Fig. 17A View Fig . Eye tubercle: 0.68 long; 1.08 wide. AME-ALE distance 0.63. Eye diameters: AME 0.32, ALE 0.34, PME 0.13, PLE 0.22. Thoracic fovea procurved ( Fig. 17A View Fig ). Labium and sternum without cuspules ( Fig. 17B View Fig ). Basal segment of chelicerae with a prolateral row of 5 small teeth equally distributed, rastellum with 5 spines ( Fig. 17B View Fig ).

LEGS. Tibia, metatarsus and tarsus I as shown in Fig. 17G View Fig . Leg I with double tibial apophysis. Leg I tibial apophysis with apical branch twice the size of basal branch and with a conspicuous spine ( Fig. 17G–I View Fig ). Pseudoscopula: tarsus I weakly covered ( Fig. 17G View Fig ), tarsus II–IV totally covered.

PALP. Tibia with thickened median portion and with larger spines concentrated in basal portion of retrolateral depression ( Fig. 17C View Fig ), embolus elongated, tapered, and slightly curved, with torsion on apical portion ( Fig. 17D–F View Fig ), keel along embolus length extending to apical portion ( Fig. 17D View Fig ).

PALP AND LEG MEASUREMENTS. Palp = 6.9 (2.3, 1.3, 2.4, 0.9), I = 13.4 (4.3, 1.9, 3, 2.9, 1.3), II = 11.3 (3.5, 1.8, 2.5, 2.5, 1), III = 10 (2.7, 1.5, 1.9, 2.6, 1.3), IV = 13.6 (3.9, 1.9, 3.5, 3.1, 1.2).

SPINATION. Palp: Ti r39, Ta d0-0-3. Leg I: Pa v0-1-2, r1-2-3, Ti v1-2-3, r1-2-6, Mt v1-4-7, p0-0-2, p0-1-1, r4-4-5, Ta v0-1-0, p0-2-3, p1-2-3, r4-4-3. Leg II: Pa v0-0-3, d0-0-1, Ti v2-3-7, d3-4-8, Mt v4-6-8, d5-6-7, p1-2-4, r0-2-3, Ta p1-3-3, r2-2-3. Leg III: Pa v0-0-2, Ti v1-2-3 r0-1-0, Mt v3-6-7, d0-0-2, p2-2-3, r1-2-4, Ta p3-4-4, r1-3-3. Leg IV: Pa v0-0-3, Ti v1-2-2, Mt v1-4-8, p0-0-1, r0-2-3, Ta v2-4-5, p0-1-2, r2-3-2.

Female (paratype MPEG 0123)

HABITUS. See Fig. 17J View Fig .

MEASUREMENTS. TBL 9.9, CL 5.5, CW 4,8, LL 0.9, LW 1.2, SL 3.4, SW 2.9.

COLOR. Brown carapace and trochanter, remainder of leg light brown ( Fig. 17J–L View Fig ). Abdomen dark gray.

PROSOMA. Carapace and ocular arrangement as shown in Fig. 17J View Fig . Eye tubercle: 0.7 long; 1.1 wide. AME-ALE distance 0.9. Eye diameters: AME 0.3, ALE 0.3, PME 0.2, PLE 0.4. Thoracic fovea procurved ( Fig. 17J View Fig ). Labium with with 13 cuspules ( Fig. 17K View Fig ). Maxilla with 117 cuspules, distributed throughout the maxillae, with larger spines on anterior half ( Fig. 17K View Fig ). Basal segment of chelicerae with a prolateral row of 6 large teeth and 2 retrolateral small teeth, grouped in basal half, rastellum with 16–18 short and thick spines ( Fig. 17K View Fig ).

PALP AND LEG MEASUREMENTS. Palp = 6.4 (2.3, 1.2, 1.6, 1.3), I = 7.4 (2.5, 1.5, 1.6, 1, 0.8), II = 6.5 (2.3, 1.6, 1.2, 0.9, 0.5), III = 7 (1.9, 1.6, 1.3, 1.4, 0.8), IV = 9.5 (2.6, 1.7, 2.1, 2.2, 0.9).

SPINATION. Palp: Pa p0-0-1, Ti p4-7-7, r4-6-8, Ta p10-8-7, r10-7-9. Leg I: Ti p4-4-5, r3-5-8, Mt p8-7-8, r5-5-6, Ta p3-4-2, r5-4-0. Leg II: Ti v1-1-2, p3-3-4, r0-1-3, Mt v1-1-2, p6-7-9, r2-2-1, Ta p2-3-3, r2-1-0. Leg III: Pa p4-5-10, Ti v0-0-2, p2-4-6, r4-4-6, Mt v1-1-2, d0-0-2, p3-3-3, r0-2-1. Leg IV: Ti v1-1-2, Mt v1-1-3, vp0-0-2, Ta v0-1-2, p1-1-2.

SPERMATHECAE. Single sclerotized base that is divided into two divergent ducts, receptacula strongly sclerotized ( Fig. 17L View Fig ).

Distribution

Brazil. Distributed in phytophysiognomies in the Amazon, with records for the North region (western Amazonas and northwestern Pará) ( Fig. 3B View Fig )

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Idiopidae

Genus

Idiops

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