Boagrius qiong Lin & Li, 2022

Suzuki, Yuya & Hisasue, Yu, 2024, Discovery of presumably introduced spiders, Oedignatha scrobiculata Thorell, 1881 (Araneae, Liocranidae) and Boagrius qiong Lin & Li, 2022 (Araneae, Palpimanidae) on Chichi-jima Island, the Ogasawara Islands, Japan, Biodiversity Data Journal 12, pp. 121421-121421 : 121421

Boagrius qiong Lin & Li, 2022

Boagrius qiong Boagrius qiong Lin et al., 2022 - Lin et al. (2022): 28, f. 1A-D, 2A-F (Male holotype (IZCAS-Ar 42724) from Xiuying District, Haikou, Hainan, China; photographs examined).

Materials

Type status: Other material. Occurrence: recordedBy: Yu Hisasue; individualCount: 1; sex: male; lifeStage: adult; occurrenceID: 8339A370-8A92-573D-9431-EB02F53405AF; Taxon: scientificName: Boagrius qiong Lin & Li, 2022; order: Araneae; family: Palpimanidae; genus: Boagrius; specificEpithet: qiong; taxonRank: species; scientificNameAuthorship: YJ. Lin & SQ. Li; Location: islandGroup: Ogasawara Islands; island: Chichi-jima Island; country: Japan; stateProvince: Tokyo; county: Ogasawara-mura; municipality: Higashi-machi; locality: Mt. Ogami-yama ; decimalLatitude: 27.0967; decimalLongitude: 142.1976; geodeticDatum: WGS84; Identification: identifiedBy: Yuya Suzuki; dateIdentified: 2024; Event: samplingProtocol: sifting; eventDate: 24-12-2023; Record Level: basisOfRecord: PreservedSpecimen

Description

Male. Measurements. Body 3.01 long; carapace 1.56 long, 1.17 wide, 0.90 high. Eye diameter: AME 0.10, ALE 0.05, PME 0.06, PLE 0.04. Eye interdistances: AME-AME 0.09, AME-ALE 0.07, PME-PME 0.17, PME-PLE 0.13. Length of legs: I, 0.96 + 0.67 + 0.62 + 0.30 + 0.34 = 2.89; II, 0.71 + 0.49 + 0.54 + 0.45 + 0.29 = 2.48; III, 0.73 + 0.37 + 0.53 + 0.51 + 0.33 = 2.47; IV, 1.04 + 0.45 + 0.78 + 0.71 + 0.35 = 3.33. Abdomen 1.61 long, 1.15 wide, 1.33 high.

Carapace oval, slightly longer than wide (length/width 1.33), covered with small granules. Fovea short. ALE and PLE juxtaposed. Palp (Fig. 5 ): tibia barrel-shaped, embolus spiralled, tegular apophysis branched into two parts: TA1 with membranous triangular base and thin projection; TA2 robust, screlotised, triangular. Femur I robust; metatarsi I and tarsi I with well-developed prolateral scopula; metatarsi II-IV with distal preening brush. Abdomen oval, longer than wide (length/width 1.40). Anterior region of abdomen covered with dorsal and epigastric scuta.

Colouration and markings (Fig. 6 and Fig. 4 B): carapace, chelicerae, maxillae, sternum and epigastric scutum reddish-orange, palps and legs yellowish-orange, abdomen reddish-orange in live spider, whereas turning to pale yellow in ethanol.

Diagnosis

Boagrius qiong resembles B. tenuisus Sankaran, 2022 in the general appearance and the palpal morphology, but can be distinguished by the shape of the tegular apophysis: TA2 (retrolateral branch) triangle-shaped, wide; TA1 (prolateral one) strongly curved, narrowed, with pointed apophysis on the middle region; TA2 slightly exceeding TA2 (Fig. 5 ) (cf. both TA1 and 2 narrowed, TA1 slightly curved, lacking pointed apophysis in the middle, TA2 clearly exceeding the tip of TA1 in B. tenuisus : Sankaran 2022, fig. 6)

Distribution

China (Hainan), Japan (Chichi-jima Island)

Figures

Figure 4. Live spiders and the habitats of Oedignatha scrobiculata Thorell, 1881 and Boagrius qiong Lin & Li, 2022 on Chichi-jima Island, Japan. A female of O. scrobiculata (TKPM-AR 3193); B male of Boagrius qiong Lin & Li, 2022 (TKPM-AR 3219). C, D habitats at Mt. Ogami-yama, Chichi-jima Island.

Figure 5. Male left palp of Boagrius qiong Lin & Li, 2022 from Chichi-jima Island, Japan (TKPM-AR 3219). A, E ventral view; B, F retrolateral view; C, G ventral-prolateral view; D, H prolateral view.

Figure 6. Male of Boagrius qiong Lin & Li, 2022 from Chichi-jima Island, Japan (TKPM-AR 3219). A habitus, dorsal view; B carapace, dorsal view; C habitus, ventral view; D habitus, lateral view, left legs removed; E left leg I, prolateral view. Arrows indicate prolateral scopula of tibia and distal preening brush of metatarsus.