Cybaeus yeongwolensis,

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 1View FIGURE 1, 5View 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. TGoogleMaps  . Kim ( NIBR-QKVWIV0000000037–42)  ; 2 males, same data as holotype, leg. S. TGoogleMaps  . 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. 1HView FIGURE 1), a slightly anteriorly protruding RTA in ventral view ( Fig. 1EView FIGURE 1), and 4 small and 4 large retromarginal teeth ( Fig. 1BView FIGURE 1), versus 13 peg setae ( Fig. 2HView FIGURE 2), a strongly anteriorly protruding RTA ( Fig. 2EView FIGURE 2), and 3 small and 4 large retromarginal teeth ( Fig. 2BView 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. 1AView 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. 1BView 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. 1CView 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. 1AView 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. 1HView 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–GView 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