Cybaeus yeongwolensis, Lee & Yoo & Kim, 2021

Lee, Sue Yeon, Yoo, Jung Sun & Kim, Seung Tae, 2021, Four new epigean spiders of the genus Cybaeus (Araneae: Cybaeidae) from South Korea, Zootaxa 4966 (4), pp. 458-468: 460-461

publication ID

https://doi.org/10.11646/zootaxa.4966.4.4

publication LSID

lsid:zoobank.org:pub:62FE9E52-E3F2-4484-800D-61D916872A5A

DOI

http://doi.org/10.5281/zenodo.4738788

persistent identifier

http://treatment.plazi.org/id/1DBAF0DF-2034-45BC-9EF7-753D64DA7C05

taxon LSID

lsid:zoobank.org:act:1DBAF0DF-2034-45BC-9EF7-753D64DA7C05

treatment provided by

Plazi

scientific name

Cybaeus yeongwolensis
status

sp. nov.

Cybaeus yeongwolensis   sp. nov.

Figs 1 View FIGURE 1 , 5 View FIGURE 5

Type material. Holotype: Male , 24 August 2020, Naedeok-ri , Sangdong-eup , Yeongwol-gun, Gangwon-do, Korea (37°06'58" N, 128°45'00.5" E, alt. 344 m), leg. S. T. Kim ( NIBR-QKVWIV0000000034) GoogleMaps   , Paratypes: 6 males, same data as holotype, leg. S. T GoogleMaps   . Kim ( NIBR-QKVWIV0000000037–42)   ; 2 males, same data as holotype, leg. S. T GoogleMaps   . Kim (KKU-LEI-Ara20200824- CY001–2)   .

Etymology. The species name is derived from the type locality, Yeongwol-gun.

Diagnosis. The new species is most similar to Cybaeus culter   sp. nov. in the shape of the palpal organ and body appearance, but can be easily distinguished from the latter by the number of peg setae on the PA, the shape of the RTA, and the number and size of the retromarginal teeth: males of C. yeongwolensis   have 21 peg setae on the PA ( Fig. 1H View FIGURE 1 ), a slightly anteriorly protruding RTA in ventral view ( Fig. 1E View FIGURE 1 ), and 4 small and 4 large retromarginal teeth ( Fig. 1B View FIGURE 1 ), versus 13 peg setae ( Fig. 2H View FIGURE 2 ), a strongly anteriorly protruding RTA ( Fig. 2E View FIGURE 2 ), and 3 small and 4 large retromarginal teeth ( Fig. 2B View FIGURE 2 ) in C. culter   . In addition, leg spination on the femur, tibia and metatarsus differs between the two species ( Table 1).

Description. Male holotype. Total length 4.13. Carapace: 2.24 long / 1.67 wide, dusky blackish brown, head region darker than thoracic region, oval, cervical and radial furrows distinct, longitudinal fovea needle-shaped, head region slightly elevated ( Fig. 1A View FIGURE 1 ). Eyes: AER 0.40, PER 0.58, AME 0.04, ALE 0.11, PME 0.06, PLE 0.10, AME-AME 0.05, AME-ALE 0.04, PME-PME 0.13, PME-PLE 0.08, AME-PME 0.10, ALE-PLE 0.05, all eyes on slightly raised eye tubercles, eye region infuscate, AER slightly recurved and PER almost straight from above. Chelicera: 0.61 long / 0.31 wide, pale blackish brown with 3 promarginal teeth and 8 retromarginal teeth (4 small and 4 large) ( Fig. 1B View FIGURE 1 ), lateral condyle present. Endite: 0.58 long / 0.33 wide, pale blackish brown. Labium: 0.27 long / 0.30 wide, pale blackish brown. Sternum: 1.00 long / 0.99 wide, pale blackish brown, subcordate, convex, posterior end pointed protruding slightly between the coxae of leg IV ( Fig. 1C View FIGURE 1 ). Legs: I 7.85 (1.97, 0.78, 2.10, 1.82, 1.18) / II 5.94 (1.22, 0.72, 1.53, 1.47, 1.00) / III 5.33 (1.50, 0.65, 1.00, 1.33, 0.85) / IV 7.66 (1.80, 0.63, 2.25, 1.87, 1.11), leg formula I-IV-II-III, thick yellowish brown, robust and strongly developed, no annuli, leg supination in Table 1. Abdomen: 1.85 long / 1.51 wide, dark blackish brown, ovoid, two pairs of pale spots and five chevrons on dorsum, densely clothed with short blackish brown hair ( Fig. 1A View FIGURE 1 ). Palp: 2.60 (0.89, 0.38, 0.30, -, 1.03), tibia shorter than patella, PA blunt and protrudent 21 peg setae ( Fig. 1H View FIGURE 1 ), RTA modified long and moderately shallow, slightly protrudent anteriorly in ventral view, embolus long and slender, shorter than conductor, conductor banana-shaped with pointed PCo, embolus parallel and slightly separated from the margin of conductor, almost close to the PCo ( Figs. 1D–G View FIGURE 1 ).

Distribution. Korea (Naedeok-ri, Yeongwol-gun, Gangwon-do). Only known from the type locality.

Remarks. The specimens of Cybaeus yeongwolensis   were collected in a pitfall trap in leaf litter along the roadside of a hilly mixed forest (alt. 344 m).

T

Tavera, Department of Geology and Geophysics

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Cybaeidae

Genus

Cybaeus