Pseudogagrella nigridorsa, Chen, Ssu-Li & Shih, Hsi-Te, 2017

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, Zootaxa 4268 (1) : -

publication ID	https://doi.org/ 10.11646/zootaxa.4268.1.2
publication LSID	lsid:zoobank.org:pub:B64418EF-AF70-47FD-BFBA-49B6FFC81282
DOI	https://doi.org/10.5281/zenodo.6040306
persistent identifier	https://treatment.plazi.org/id/03F01D31-9A0C-FF8C-FF6D-86E2FC586EFC
treatment provided by	Plazi
scientific name	Pseudogagrella nigridorsa
status	sp. nov.

Treatment

Pseudogagrella nigridorsa View in CoL sp. nov.

( Figs. 3–4 View FIGURE 3 View FIGURE 4 )

Type material. Holotype: 1 ♂ (NCHUZOOL 14843), Lalashan National Forest Sanctuary , Fusing, Taoyuan City, Taiwan, 24°42’35.58”N, 121°26’13.24”E, elevation of 1614 m, coll. S.- L. Chen, 9 Jul. 2014 GoogleMaps . Paratypes: 1 ♂ (NCHUZOOL 14844), 1 ♀ (NCHUZOOL 14845) and 2 ♀♀ (NCHUZOOL 14846), same data as holotype GoogleMaps ; 1 ♂ (NCHUZOOL 14847), Lalashan National Forest Sanctuary , Fusing, Taoyuan City, Taiwan, 24°42’35.43”N, 121°26’13.65”E, elevation of 1609 m, coll. S.- L. Chen, 1 Jun. 2014 GoogleMaps ; 1 ♀ (NCHUZOOL 14848), Lalashan National Forest Sanctuary , Fusing, Taoyuan City, Taiwan, 24°42’32.41”N, 121°26’12.82”E, elevation of 1588 m, coll. S.- L. Chen, 10 Jul. 2014 GoogleMaps ; 1 ♀, Juvenile (NCHUZOOL 14849), Lalashan National Forest Sanctuary , Fusing, Taoyuan City, Taiwan, 24°42’38.69”N, 121°26’18.36”E, elevation of 1619 m, coll. S.- L. Chen, 10 Jul. 2014 GoogleMaps ; 1♀ (NCHUZOOL 14850), Lalashan National Forest Sanctuary , Fusing, Taoyuan City, Taiwan, 24°42’35.43”N, 121°26’13.65”E, elevation of 1609 m, coll. S.- L. Chen, 1 Jun. 2014 GoogleMaps ; 1 ♂ (NCHUZOOL 14851), Lalashan National Forest Sanctuary , Fusing, Taoyuan City, Taiwan, 24°42’35.43”N, 121°26’13.65”E, elevation of 1609 m, coll. S.- L. Chen, 31 May 2014 GoogleMaps ; 1 ♂ (NMNS-7707-003), 1 ♂ ( ZMB / Arach 48782), and 1 ♀ ( ZMB / Arach 48783), same data as holotype. GoogleMaps

Etymology. The name is derived from the Latin niger and dorsum, for the color of male adult body, especially the deep black of the abdominal tergites.

Diagnosis. Pseudogagrella nigridorsa differs from all other Taiwanese species in having black body. It is most similar to P. arishana ( Suzuki 1977: fig. 10A–L); however, all legs of P. nigridorsa are black, but legs of P. arishana are dark brown, with brown rings; and the stylus of glans of P. nigridorsa is acicular, which is not found in P. arishana .

Description. Male holotype. Dorsal surface of body glossy. Supra-cheliceral lamellae tipped with few tubercles ( Fig. 3 View FIGURE 3 I). Abdomen with one short median spine on the second tergite. Ocularium nearly elliptic ( Fig. 3 View FIGURE 3 D–E), with two rows of two setae. Eye ring black, dark between eyes. All free sternites and genital operculum granulate, with sparse hairs. Surface of all coxae with coarse granules. All coxae with a row of humps anteriorly and posteriorly.

Chelicera ( Fig. 3 View FIGURE 3 J–K). Basal segment with a few setae, ventral spur below; medial aspect with black-tipped tubercles. Distal segment with some setae above, ectal aspect smooth, medial aspect with some black-tipped tubercle.

Pedipalp ( Fig. 3 View FIGURE 3 A–B). All segments setose, excepting trochanter. Femur with a few denticles on ectal aspect, some ventral spine-tipped tubercle on ectal aspect. Patella swollen into a slight lobe at inner tip. Tibia slightly thickened, with dense covering of hairs below. Tarsus elongated, with a row of denticles on medial aspect. Claw pectinate.

Legs. All legs slim and elongate. Trochanters mound-shaped ( Fig. 4 View FIGURE 4 A), all femora without false articulations, tarsus longer than tibia.

Penis ( Fig. 3 View FIGURE 3 F–G). Shaft 2.29 long, 0.27 wide at base, 0.23 wide at middle; glans 0.33 long, 0.1 wide at base. Shaft wide, with sides nearly parallel; alate part oval, both sides with sharp protrusions. Glans widest at base. Stylus acicular.

Female paratypes. Dorsal surface of body similar to male, excepting abdomen of female longer than male ( Fig. 4 View FIGURE 4 C–D). Tibia of pedipalps normal without dense covering of hairs below ( Fig. 3 View FIGURE 3 C). Seminal receptacle ( Fig. 3 View FIGURE 3 H), located between segments five to six of ovipositor, terminal with one ampulla.

Measurements. Holotype male (female paratype, NCHUZOOL 14845): Cephalothorax 1.5 (2.0) long, 3.2 (3.4) wide; abdomen 2.8 (5.0) long, 2.8 (3.9) wide. Total length of body 4.2 (6.9). The appendage measurements of P. nigridorsa are in Table 3.

Coloration. Dorsum black with metallic luster. Carapace black with metallic luster ( Fig. 4 View FIGURE 4 A–B, E). Ocularium blackish brown, with black eye rings. Coxa of all legs black. Genital operculum with distal margin pale yellow, darkening gradually to base. Sternites blackish brown. Chelicerae pale yellow, with dark brown figure above. Pedipalps dark brown, femur and patella darker. All legs black.

Distribution. Northern Taiwan ( Fig. 8 View FIGURE 8 ).

Habitat. The specimens were collected in bushes and tree trunks.