Gelotia onoi, Hoang & & Vo & Van M., 2024

Hoang, Quang D., , Quoc T. Phan, Vo, & Van M., 2024, First record of Gelotia Thorell, 1890 (Araneae: Salticidae) from Vietnam with description of a new species, Raffles Bulletin of Zoology 72, pp. 294-302 : 296-297

Gelotia onoi , new species

( Figs. 1–2)

Material examined. Holotype: female (VNMN-ARA- SAL-480), VIETNAM, Dak Lak Prov., Buon Don Dist., Yok Don National Park , 12.9462°N, 107.7294°E, 140m a.s.l., 4 February 2024, coll. Q.D. Hoang.

Etymology. This specific epithet is given to honour Dr. Hirotsugu Ono ( Japan), who has made great contributions to improving knowledge of the spider fauna in Vietnam.

Diagnosis. The female of Gelotia onoi , new species ( Figs. 1–2) resembles those of the type species, G. frenata Thorell, 1890 and G. liuae Wang & Li, 2020 in having the epigyne with a fold and rounded window, but differs from two latter species by the following characteristics: the epigynal window located in the near middle in the new species ( Fig. 2C) while anterior in both G. frenata (fig. 5 in Prószyński, 1969) and G. liuae (cf. Fig. 4C and fig. 8A in Wang & Li, 2020), copulatory duct significantly longer than the length of spermathecae ( Fig. 2D) (shorter in other species), spermathecae almost rounded, relatively very small ( Fig. 2D) in comparision with G. frenata and G. liuae as well as all other members of the genus Gelotia (see comparative illustrations in Metzner, 2024).

Description. Female holotype. Measurements: Total length 4.63; carapace length 2.31, width 1.72; abdomen length 2.32, width 1.34; clypeus height 0.08. Carapace brown, clothed with dense iridescent setae, lateral sides dark with yellowish belt ( Figs. 1A–D, Fig. 2A); fovea longitudinal. Anterior eyes surrounded by yellow-orange orbital setae ( Fig. 2B). Clypeus dark brown, narrowest medially with some long setae ( Fig. 2B). Sternum yellowish brown, with darker margin and sparse long setae. Endites and labium brownish yellow. Chelicerae brownish yellow ( Fig. 2B); promargin with three teeth, and five retromarginal teeth. Abdomen brown, covered with dense iridescent setae and with a large transverse stripes in posterior half of dorsum ( Figs. 1A–D, Fig. 2A); venter brownish yellow. Lateral sides of abdomen dark brown covered with yellow setae. Spinnerets very short, dark brown. Legs brown, covered with densely pale setae ( Fig. 2A). Width of eye rows: anterior eye row 1.67; posterior medial eye row 1.53; posterior lateral eye row 1.64. Distance between ALE-PME 0.51; ALE-PLE 1.09. Diameter of eyes: AME 0.56; ALE 0.32; PME 0.18; PLE 0.29. Length of leg segments: I 1.46 + 0.82 + 1.12 + 0.95 + 0.52 (4.87); II 1.36 + 0.75 + 0.92 + 0.89 + 0.49 (4.41); III 1.29 + 0.63 + 0.91 + 0.99 + 0.43 (4.25); IV 1.73 + 0.74 + 1.40 + 1.62 + 0.48 (5.97). Leg formula IV–I–II–III. Leg spination: I: Fm d 1–1–4; Pt pr 1; Tb v 2–2–2ap, pt 1–1; Mt v 2–2. II: Fm d 1–1–4; Pt pr 1, rt 1; Tb v 1–2–2ap, pt 1–1; Mt v 2–2. III: Fm d 1–1–4; Pt pr 1, rt 1; Tb d 1–1, pt 0–1–1ap, v 1–0–2ap, rt 0–1–1ap; Mt d 1–2–2ap, v 0–2–2ap., and IV: Fm d 1–1–4; Pt pr 1, rt 1; Tb d 1–1, pt 1–1, rt 1–1; Mt d 2–2–2ap, rt 1ap, v 1–0–2ap, pr 1ap.

Epigyne ( Fig. 2C–D): longer than wide, the fold of epigyne wider than the window, and the rim of epigynal window almost rounded ( Fig. 2C). Copulatory ducts fused, long, widest medially ( Fig. 2D). Spermathecae fused, rounded and significantly shorter than copulatory ducts ( Fig. 2D).

Male: Unknown.

Distribution. Known only from the type locality.