Hylyphantes nigritus
Creators: name: Seo, Bo Keun
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Linyphiidae
Hylyphantes
Hylyphantes nigritus

description: Hylyphantes nigritus (Simon, 1881)   
 äạẇjḍljHḑ (ṉÿ) ( Figs. 5 E-F, 8A-F)   
 Erigone nigrita Simon, 1881: 233.   
 Hylyphantes nigritus Tanasevitch, 1990: 102; Tu and Li, 2005: 62.   
 Material examined. 2♂♂, 1$, grassland (36°21 ʹ 37 ʺ N, 127°14 ʹ 50 ʺ E, alt. 161 m), Banpo-myeon, Gongju-si, Chungcheongnam-do, 16 June 2006, C. W. Lee.   
 Diagnosis. This species is very similar to H. graminicola (Sundevall, 1830) in general appearance, but easily distinguished from the latter by the embolus with seven spirals and the absence of ventral apophysis of patella (Fig. 8 A-B).   
 Description. Male. Total length 2.10. Habitus as in Figure 5E. Carapace dark brown, 0.90 long, 0.65 wide. Clypeus height 3.3 times of diameter of AME. AER 0.26, PER 0.29; AER recurved and PER procurved, slightly in dorsal view. AME 0.05, ALE 0.07, PME 0.05, PLE 0.07, AME-AME 0.03, AME-ALE 0.02, PME-PME 0.05, PME-PLE 0.04, AME-PME 0.06, and ALE-PLE contiguous. Median ocular quadrangle, posterior side = height>anterior side (12:10). Chelicera with six promarginal and five retromarginal teeth. Sternum 0.52 long, 0.52 wide. Labium 0.17 wide. Leg measurements: I 3.59 (1.00, 0.23, 0.87, 0.90, 0.59), II 3.24 (0.88, 0.23, 0.77, 0.81, 0.55), III 2.48 (0.68, 0.22, 0.52, 0.62, 0.44), IV 3.29 (0.91, 0.23, 0.78, 0.85, 0.52). Leg I/c 3.99. Fem. I/c 1.11. Tib. I/c 0.97. Met. I/c 1.00. Pat. I + tib. I/c 1.22. Met. I/tar. I 1.53. Met. IV/tar. IV 1.63. Chaetotaxy 2-2- 1-1. Tm 1 0.64, Tm IV present. Abdomen oval and dirty brown, with five pale transverse lines posteriorly, and 1.15 long, 0.68 wide. Palp (Fig. 8 A-C): tibia with dorso-prolateral apophysis; embolus spiral; distal suprategular apophysis elongate; protegulum cotton-like.   
Female. Total length 2.40. Habitus as in Figure 5F. Carapace 0.90 long, 0.65 wide. Clypeus height 3 times of diameter of AME. AER 0.27, PER 0.29. AME 0.05, ALE 0.05, PME 0.05, PLE 0.05, AME-AME 0.03, AME-ALE 0.03, PME-PME 0.05, PME-PLE 0.05, AME-PME 0.05, and ALE-PLE contiguous. Median ocular quadrangle, posterior side>height = anterior side (12:10). Both margins of chelicera armed with three marginal teeth. Sternum 0.52 long, 0.51 wide. Labium 0.16 wide. Leg measurements: I 3.35 (0.91, 0.25, 0.82, 0.82, 0.55), II 3.08 (0.85, 0.25, 0.73, 0.73, 0.52), III 2.52 (0.72, 0.23, 0.55, 0.59, 0.43), IV 2.77 (0.78, 0.21, 0.66, 0.68, 0.44). Leg I /c 3.72. Fem. I /c 0.1.01 Tib. I /c 0.90. Met. I /c 0.90. Pat. I + tib. I/c 1.19. Met. I /tar. I 1.49. Met. IV /tar. IV 1.55. Chaetotaxy 2-2-1-1. Tm 1 0.61, Tm IV present. Abdomen oval and brown without pale lines, and 1.50 long, 1.08 wide. Epigynum: atrium with a medial septum with a pair of copulatory openings; internal genitalia with a pair of convoluted copulatory ducts and a pair of spermathecae anteriorly (Fig. 8 D-F).  
 Habitat. Grassland.   
 World Distribution. Caucasus, China, Europe, Korea (Chungcheongnam-do).   
 Deposition. NIBR.   
 Identifier. Bo Keun Seo.
description: Published as part of Seo, Bo Keun, 2018, New species and records of the spider families Pholcidae, Uloboridae, Linyphiidae, Theridiidae, Phrurolithidae, and Thomisidae (Araneae) from Korea, pp. 251-290 in Journal of Species Research 7 (4) on page 261, DOI: 10.12651/JSR.2018.7.4.251, http://zenodo.org/record/13162526