Pseudogagrella dorsomaculata Chen & Shih, 2017, sp. nov.
Creators: name: Chen, Ssu-Li
name: Shih, Hsi-Te
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Opiliones
Sclerosomatidae
Pseudogagrella
Pseudogagrella dorsomaculata

description: Pseudogagrella dorsomaculata sp. nov.
(Figs. 1–2)
Type material. Holotype: 1 ♂ (NCHUZOOL 14879), Dasyueshan Forest Recreation Area, Heping, Taichung, Taiwan, 24°15’22.32”N, 121°00’24.82”E, elevation of 2240 m, coll. S.- L. Chen, 30 Nov. 2014. Paratypes: 1 ♀ (NCHUZOOL 14880), same data as holotype; 1 ♂ (NCHUZOOL 14862), and 1 ♂ (NCHUZOOL 14863), Dasyueshan Forest Recreation Area, Heping, Taichung City, Taiwan, 24°15’ 51”N, 121°00’18”E, elevation of 2247 m, coll. S.- L. Chen, 26 Nov. 2013; 1 ♂ (NCHUZOOL 14864), Dasyueshan Forest Recreation Area, Heping, Taichung City, Taiwan, 24°15’51”N, 121°00’18”E, elevation of 2247 m, coll. S.- L. Chen, 26 Nov. 2013; 1 ♀ (NCHUZOOL 14865) and 1 ♀ (NCHUZOOL 14866), Siaofongkou, Ren-ai, Nantou County, Taiwan, 24°09’41.90”N, 121°17’12.51”E, elevation of 3017 m, coll. S.- L. Chen, 3 Aug. 2014; 1 ♂ (NCHUZOOL 14867) and 1 ♂ (NCHUZOOL 14868), Bilushenmu, Sincheng, Hualien County, Taiwan, 24°10’49.79”N, 121°24’11.80”E, elevation of 2200 m, coll. S.- L. Chen, 6 Jul. 2014; 1 ♂ (NMNS-7707-001), 1 ♀ (NMNS-7707-002), 1 ♂ (ZMB / Arach 48780), and 1 ♀ (ZMB / Arach 48781), Dasyueshan Forest Recreation Area, Heping, Taichung, Taiwan, 24°15’22.32”N, 121°00’24.82”E, elevation of 2240 m, coll. S.- L. Chen, 29 Nov. 2014.
Etymology. The name dorsomaculata is derived from the Latin dorsum and macula, describing the pattern on abdominal tergites of this species.
Diagnosis. Pseudogagrella dorsomaculata differs from all other Taiwanese species in having light yellow strips and patches on scutum. It is most similar to P. andoi (Suzuki 1977: fig. 10M–S); however, it can be recognized by the following characters: P. dorsomaculata has one light patch on each side of the first abdominal tergite (none in P. andoi); P. dorsomaculata has a few tubercles on basal segment of chelicerae (none in P. andoi); and the penile grans of P. dorsomaculata are wider at the base (narrower in P. andoi).
Description. Male holotype. Dorsal surface of body glossy. Supra-cheliceral lamellae tipped with some small tubercles (Fig. 1 I). Abdomen with one short median spine on the second tergite, first tergite with light yellow patches on each side. Ocularium oval (Fig. 1 D–E), with two rows of four setae, eye ring black, dark between eyes. All free sternites and genital operculum granular, with sparse hairs. Surface of all coxae with scattered coarse granules. All coxae with a row of humps anteriorly and posteriorly.
Chelicera (Fig. 1 J–K). Basal segment with a few tubercles and setae above, a ventral spur below. Distal segment with some setae above, ectal aspect smooth, medial aspect with some black-tipped tubercles.
Pedipalp (Fig. 1 A–B). All segments with lots of setae, excepting trochanter. Femur with a longitudinal row of denticles, some ventral tubercle on ectal aspect, with some denticles on medial aspect. Patella thickened distally, medial aspect with 16 denticles. Tibia slightly thickened, ventrally with covering of many hairs. Tarsus elongated, slightly concave along the ventral edge, with three denticles at medial aspect. Claw pectinate.
Legs. All legs slim and elongate. Trochanters mound-shaped (Fig. 2 A), all femora without false articulations, tarsus longer than tibia.
Penis (Fig. 1 F–G). Shaft 2.47 long, 0.28 wide at base, 0.23 wide at middle; glans 0.45 long, 0.12 wide at base. Shaft long, with sides nearly parallel, widened basally; alate part with lobe ventrally (Fig. 1 F). Glans widest at base. Stylus acicular.
Female paratypes. Dorsal surface of body similar to male, excepting abdomen of female longer than male (Fig. 2 A, C, F). Seminal receptacle (Fig. 1 H) located between segments four to five of ovipositor, terminal with two ampullae. Pedipalpal femur without a longitudinal row of denticles, tibia normal without covering of many hairs ventrally (Fig. 1 C).
Measurements. Holotype male (female paratype, NCHUZOOL 14880): Cephalothorax 1.6 (2.04) long, 2.74 (3.27) wide; abdomen 2.19 (4.8) long, 2.82 (4.01) wide. Total length of body 3.79 (6.84). Measurements of left pedipalp and right legs are shown in Table 2.
Coloration. Dorsum dark brown with rusty brown metallic luster (Fig. 2 A, C, F). Carapace blackish brown with metallic luster. Ocularium blackish brown, with black eye rings. Coxa of all legs blackish brown. Genital operculum, distal margin pale yellow, darkening gradually to base. Sternites blackish brown with pale yellow edge. Chelicerae amber, pedipalps rusty brown. All legs black.
Distribution. Central Taiwan (Fig. 8).
Habitat. The specimens were collected in bushes and tree trunks, sometimes on building walls.
description: Published as part of Chen, Ssu-Li & Shih, Hsi-Te, 2017, Descriptions of three new species of the harvestmen genus Pseudogagrella (Opiliones: Sclerosomatidae: Gagrellinae) from Taiwan, supported by morphological and molecular evidence in Zootaxa 4268 (1), DOI: 10.11646/zootaxa.4268.1.2, http://zenodo.org/record/579879