Ibana gan Liu & Li, 2022

Liu, Keke, Li, Wenhui, Yao, Yanbin, Li, Congzheng & Li, Shuqiang, 2022, The first record of the thomisid genus Ibana Benjamin, 2014 (Araneae, Thomisidae) from China, with the description of a new species, Biodiversity Data Journal 10, pp. 93637-93637 : 93637

Ibana gan Liu & Li sp. n.

Materials

Type status: Holotype. Occurrence: recordedBy: Liu Ke-Ke; individualCount: 1; sex: female; lifeStage: adult; Taxon : scientificName: Ibana gan; Location : country: China; stateProvince: Jiangxi; county: Jinggangshan County Level City ; locality: Jinggang Mountain National Nature Reserve , Maoping Town , Shenshan Village ; verbatimElevation: 924 m; verbatimCoordinates: 26°39'22.63"N, 114°12'20.16"E; georeferenceProtocol: GPS; Identification : identifiedBy: Liu Ke-Ke; dateIdentified: 2022; Event : samplingProtocol: sweeping; eventDate: 07/04/ 2020 Type status: Paratype. Occurrence: recordedBy: Liu Ke-Ke; individualCount: 2; sex: female; lifeStage: adult; Taxon : scientificName: Ibana gan; Location : country: China; stateProvince: Jiangxi; county: Jinggangshan County Level City ; locality: Jinggang Mountain National Nature Reserve , Maoping Town , Shenshan Village ; verbatimElevation: 924 m; verbatimCoordinates: 26°39'22.63"N, 114°12'20.16"E; georeferenceProtocol: GPS; Identification : identifiedBy: Liu Ke-Ke; dateIdentified: 2022; Event : samplingProtocol: sweeping; eventDate: 07/04/ 2020 Type status: Paratype. Occurrence: recordedBy: Liu Ke-Ke; individualCount: 1; sex: female; lifeStage: adult; Taxon : scientificName: Ibana gan; Location : country: China; stateProvince: Jiangxi; county: Jinggangshan County Level City ; locality: Ciping Town , Dajing Village , General Forest ; verbatimElevation: 988 m; verbatimCoordinates: 26°33'3.6"N, 114°6'50.4"E; georeferenceProtocol: GPS; Identification : identifiedBy: Liu Ke-Ke; dateIdentified: 2022; Event : samplingProtocol: sweeping; eventDate: 07/03/2020

Description

Female (holotype). Habitus as in Fig. 1 A and B and Fig. 4 B-D. Total length 9.5, carapace 4.1 long, 3.94 wide, with abundant white setae on surface. AER strongly recurved and PER slightly recurved; eye sizes and interdistances (Fig. 1 A and C): AME 0.1, ALE 0.19, PME 0.14, PLE 0.16; AME-AME 0.17, AME-ALE 0.13, PME-PME 0.29, PME-PLE 0.25, AME-PME 0.36, AME-PLE 0.56, ALE-ALE 0.59, PLE-PLE 1.07, ALE-PLE 0.27. MOA 0.42 long, frontal width 0.34, posterior width 0.56. Chelicerae (Fig. 1 B and D) with abundant setae on frontal part, three promarginal (median largest, proximal smallest) and two retromarginal teeth (distal stout, apex split into two branches of different sizes). Endites (Fig. 1 B and D) slightly oblique, longer than wide, brush-shaped, anterolateral area of endite with rows of thick setae. Labium slightly wider than long, anteriorly with 12-14 setae. Sternum (Fig. 1 B), longer than wide, anteromedially with a wide notch, lateral margin with weak precoxal triangles, except intercoxae I and II, posteriorly triangular, pointed end. Legs (Fig. 1 F-I): measurements: I 17.41 (5.19, 2.26, 4.99, 3.26, 1.71); II 17.07 (5.24, 2.22, 4.92, 3.05, 1.64); III 9.18 (2.93, 1.47, 2.36, 1.58, 0.84); IV 10.84 (3.58, 1.53, 2.69, 2.00, 1.04); spination: I Fe: d10, p3, r5; Pa: d1, r1; Ti: p3, r3, v8; Mt: d2, p2, r2, v4; II Fe: d9; Pa: d1, r1; Ti: p3, r1, v8; Mt: d2, p2, r2, v4; III Fe: d2; Pa: d1; Ti: d3, p3, r2, v4; Mt: d3, p2, r3, v5; IV: Fe: d2, p1, r1; Pa: p1, r1; Ti: d2, p2, r2, v4; Mt: d3, p3, r1, v3. Abdomen (Fig. 1 E) 5.07 long, 4.91 wide, with two pairs of sigilla in anteromedial part.

Colouration (Fig. 1 ). Carapace reddish-brown, with radial, irregular, narrowed dark-brown stripes around longitudinal fovea. Chelicerae dark brown. Endites and labium yellowish-brown. Sternum yellowish-brown. Legs: coxae I yellow brown, II-IV yellow; femora, patellae, tibiae, metatarsi and tarsi I and II yellow brown; leg III yellow, with dark brown annulations on distal tibia and metatarsus; leg IV yellow, with dark brown annulations on distal femur, tibia and metatarsus and on patella. Abdomen yellowish-white, medially with a broad yellow brown band; venter with three yellowish-brown stripes medially.

Epigyne (Fig. 2 and Fig. 3 ). Peento-like, anteromedially with a transverse ridge (TrC). Copulatory openings (CO) located at the lateral of the ridge, slit-like. Copulatory ducts (CD) flat, extending along spermathecae from anterolateral of the ridge to posterior of spermathecae. Spermathecae (Spe) round, contiguous. Fertilisation ducts (FD) relatively broad, located posteriorly on spermathecae, directed anterolaterally.

Male. Unknown.

Comments

In life (Fig. 4 ), this species exhibits green colours in most parts of the legs and abdomen, while yellowish after preservation in ethanol.

Diagnosis

The new species can be distinguished from Ibana senagang Benjamin, 2014 ( Benjamin 2014: 181, figs. 1G, 3A-C) by the transverse ridge of copulatory openings present (vs. absent), the copulatory ducts extending from anterolateral to posteromedial part of epigyne (vs. from medial to anteromedial) and the oval, contiguous spermathecae (vs. close touching) (Figs 2 , 3 ).

Etymology

The specific name refers to the Chinese abbreviation for Jiangxi Province; noun in apposition.

Distribution

Known only from the type locality in Jiangxi Province, China (Fig. 5 ).

Figures

Figure 1. Ibana gan sp. n., female holotype. A habitus, dorsal view; B same, ventral view; C frontal part of prosoma, dorsal view; D chelicerae, white arrow shows the distal stout retromarginal tooth, posterior view; E abdomen, dorsal view; F legs I and II, femora, white arrow shows femur I, prolateral view; G same, black arrow shows leg I, ventral view; H leg III, retrolateral view; I leg IV, retrolateral view. Scale bars: A, B, F-I 0.5 mm; C, D 0.1 mm, E 0.2 mm.

Figure 2. Ibana gan sp. n., female holotype. A epigyne, ventral view; B vulva, dorsal view. Abbreviations: CD - copulatory duct, CO - copulatory opening, FD - fertilisation duct, Spe - spermatheca, TrC - transverse ridge of copulatory openings. Scale bars: 0.1 mm.

Figure 3. Ibana gan sp. n., female holotype. A epigyne, ventral view; B vulva, dorsal view. Abbreviations: CD - copulatory duct, CO - copulatory opening, FD - fertilisation duct, Spe - spermatheca, TrC - transverse ridge of copulatory openings. Scale bars: 0.1 mm.

Figure 4. Ibana gan sp. n., female. A type locality in Huangyangjie Scenic Spot, Jinggang Mountain National Nature Reserve; B-D photos of living specimen.

Figure 5. Records of Ibana gan sp. n., from Jiangxi Province, China.