Gongylidioides onoi Tazoe, 1994

Tu, Lihong & Li, Shuqiang, 2004, A Preliminary Study Of Erigonine Spiders (Linyphiidae: Erigoninae) From Vietnam, Raffles Bulletin of Zoology 52 (2), pp. 419-433 : 426

Gongylidioides onoi Tazoe, 1994

( Fig. 5 )

Gongylidioides onoi Tazoe, 1994: 131 , Figs. 1-7 (Dmf). Aprifrontalia quadrialata Gao, Xing & Zhu, 1996: 293 , Figs. 2 A-

E. (New synonymy)

Material examined. – 1 male, 2 females, Tan Linh Village , Son Tay Province, Bavi District, Vietnam (138), 24 Dec.2000 ; 2 males, 1 female ( NSMT, -Ar.3176), paratypes of Gongylidioides onoi Tazoe, 1994 , Komi, Iriomotejima Is., Okinawa, Pref., Japan, 30 Mar.1989 ; 2 males, 2 females ( JLU), paratypes of Aprifrontalia quadrialata Gao, Xing & Zhu, 1996 , Putuo Moutain, Zhejiang Province, China, 20-21 Aug.1992 .

Diagnosis. – Males of this species can be recognized by the palpal tibia with four apophyses ( Fig. 1G ) and the combination characters of embolic division. Females are diagnosed by the ventral plates of epigynum, shaped like two closed doors ( Fig. 5H ).

Description of male. – Total length: 1.93. Carapace: 0.93 long, 0.67 wide. Abdomen: 1.00 long, 0.73 wide. Carapace ( Fig. 5A ) yellowish brown, cephalic portion slightly elevated behind ocular area and bearing some long hairs. Eyes with black surroundings; AME smaller, others subequal. AER recurved, anterior eyes separated by AMEr; PER straight, intervals of posterior eyes longer than PMEd; ALE and PLE juxtaposed. Chelicerae brown. Fang groove with six promarginal and five small retromarginal teeth ( Fig. 5B ). Leg pale white, lengths of legs: I 2.59 (0.80+ 0.83+ 0.53+ 0.43), II 2.40 (0.70+ 0.8+ 0.50+ 0.40), III 2.0 (0.57+ 0.63+ 0.47+ 0.33), IV 2.73 (0.73+ 0.90+ 0.70+ 0.40); tibia spines: 2-2-1- 1; Tm I: 0.59; Tm IV absent. Sternum dark brown. Abdomen with some grayish spots dorsally.

Male palp ( Figs. 5 C-G): Tibia short with one prolateral and one retrolateral tibia trichobothria, four tibia apophyses present. Paracymbium U-shaped and covered with long hairs, apical part with distally situated thumb-like process. Protegulum (PT) presents, as less sclerotized extension of tegulum. Suprategulum with triangular marginal apophysis (MSA) in prolateral view and plate-shaped distal apophysis (DSA) in retrolateral view. Embolic membrane (EM) thin and translucent, with apically situated thread-like projections in retrolateral view. Embolic division ( Fig. 5F ): Radix (R) strongly sclerotized and U-shaped, prolateral arm longer and equipped with many scale-like teeth on outside surface, retrolateral one shorter with three free ends, the outer one pointed and stout, the other two thin and sclerotized. Embolus (E) tubiliform, curved and pointed apically.

Description of female. – Total length: 2.00. Carapace: 0.90 long, 0.60 wide. Abdomen: 1.17 long, 0.73 wide. Lengths of legs: I 2.46 (0.73+ 0.8+ 0.53+ 0.40), II 2.04 (0.67+ 0.73+ 0.47+ 0.37), III 1.97 (0.60+ 0.63+ 0.43+ 0.33), IV 2.67 (0.77+ 0.87+ 0.60+ 0.43); tibia spines: 2-2-1-1; Tm I: 0.61; Tm IV absent. Other somatic characters as in male.

Epigynum ( Figs. 5 H-I): Ventral plate composed of two parts, (shaped like two closed doors) covering the anterior half of shallow atrium. Copulatory ducts short, turning and opening at the anterior atrium.

Remarks. – Gongylidioides onoi Tazoe, 1994 is new for Vietnam fauna.

Distribution. – Japan, China, Vietnam (Son Tay).

Figures

Fig. 5, Gongylidioides onoi Tazoe, 1994. A, carapace, lateral view; B, left male chelicera, frontal view; C, left male palp, retrolateral view; D, left male palp, ventral view; E, left male palp, prolateral view; F, embolic division, ventral view; G, palpal tibia, dorsal view; H, epigynum, ventral view; I, vulva, dorsal view. [Scale bars: 0.1mm].

Fig. 1, Erigone brevipes, new species. A, carapace, lateral view; B, carapace, dorsal view; C, male left chelicera, frontal view; D, left male palp, retrolateral view; E, left male palp, prolateral view; F, left male palp, ventral view; G, embolic division, ventral view; H, palpal tibia, dorsal view; I, epigynum, ventral view; J, vulva, dorsal view. [Scale bars: 0.1mm].

Fig. 2, Erigone grandidens, new species. A, carapace, lateral view; B, male left chelicera, frontal view; C, palpal tibia, retrolateral view; D, palpal tibia, dorsal view; E, left male palp, retrolateral view; F, left male palp, ventral view; G, left male palp, prolateral view; H, embolic division, ventral view; I, epigynum, ventral view; J, vulva, dorsal view. [Scale bars: 0.1mm].

Fig. 3, Erigone prominens Bösenberg & Strand, 1906. A, carapace, lateral view; B, male left chelicera, frontal view; C, left male palp, retrolateral view; D, left male palp, retrolateral view; E, left male palp, prolateral view; F, left male palp, ventral view; G, embolic division, ventral view; H, palpal tibia, dorsal view; I, epigynum, ventral view; J, vulva, dorsal view. [Scale bars: 0.1mm].

Fig. 4, Gongylidiellum linguiformis, new species. A, carapace, dorsal view; B, left chelicera, frontal view; C, epigynum, ventral view; D, vulva, dorsal view (before cleared in boiling KOH solution); E, vulva, dorsal view (after cleared in boiling KOH solution). [Scale bars: 0.05mm].

Fig. 6, Nasoona eustylis (Simon, 1909). A, carapace, lateral view; B, left chelicera, frontal view; C, palpal tibia, dorsal view; D, paracymbium; E, left male palp, retrolateral view; F, left male palp, prolateral view; G, left male palp, ventral view; H, embolic division, ventral view; I, embolic division, dorsal view. [Scale bars: 0.1mm].

Fig. 7, Nasoona eustyliis (Simon, 1909). A, epigynum, frontal view; B, epigynum, ventral view; C, epigynum, caudal view; D, epigynum, lateral view; E, vulva, dorsal view; F, vulva, caudal view. [Scale bars: 0.1mm].