Ummeliata insecticeps
Creators: name: Tu, Lihong
name: Li, Shuqiang
Publisher: name: Zenodo
Year: 2004
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Linyphiidae
Ummeliata
Ummeliata insecticeps

description: Ummeliata insecticeps (Bösenberg & Strand, 1906)   
(Fig. 8)  
 Oedothorax insecticeps Bösenberg & Strand, 1906: 163, pl. 12 fig. 257.   
 Trematocephalus acanthochirus Simon, 1909: 99, Figs. 3, 4. (New synonym)   
 Material examined. – 1 male (MNHNP AR 11929), type of Trematocephalus acanthochirus Simon, 1909; 1 female, Gao Bao Village, Ha Jiang Province, Vietnam, 9 Dec.2000; 3 males, 7 females, Viet Lann Village, Ha Jiang Province, Vietnam, 10 Dec.2000; 4 females, Viet Lann Village, Ha Jiang Province, Vietnam, 10 Dec.2000; 1 female, Viet Lann Village, Ha Jiang Province, Vietnam, 10 Dec.2000; 5 males, 8 females, Sac Ha Village, Cao Bang Province, Vietnam, 17 Dec.2000; 2 males, 1 female, Sac Ha Village, Cao Bang Province, Vietnam, 16 Dec.2000; 4 females, Sac Ha Village, Cao Bang Province, Vietnam, 16 Dec.2000; 1 female, Sac Ha Village, Cao Bang Province, Vietnam, 17 Dec.2000; 1 female, Quang Hoa Village, Cao Bang Province, Vietnam, 18 Dec.2000; 1 female, Van Hoa Village, Son Tay Province, Vietnam, 23 Dec.2000; 2 females, Viet Lann Village, Ha Jiang Province, Vietnam (042), 10 Dec.2000; 1 female, Viet Lann Village, Ha Jiang Province, Vietnam (027), 10 Dec.2000; 1 female, Tan Linh Village, Son Tay Province, Vietnam (138), 23 Dec.2000; 2 females, Viet Lann Village, Ha Jiang Province, Vietnam (022), 10 Dec.2000. Diagnosis. – The male of this species can be easily distinguished by its spiral embolus and the large sclerotized lamella characteristica; the female by the half round epigynum and the shape of the dorsal median plate exposed outside the ventral plate.   
 Description of male. – Total length: 2.43. Carapace: 1.23 long, 0.90 wide. Abdomen: 1.40 long, 0.97 wide. Carapace (Fig. 8A) brown, cephalic portion elevated into two lobes behind ocular area, the former bears many hairs, the latter smaller, bears two long bristles pointing forwards, deep groove lying between them, also with many short hairs in it. Clypeus slightly backwards. Eyes with black surroundings; AMEs smaller, others subequal. AER recurved, eyes separated by AMEd; PER straight, intervals between eyes slightly longer than PMEd; ALE and PLE juxtaposed. Chelicerae brown as carapace, fang groove with five promarginal and four retromarginal teeth, an additional tooth-like process on front face (Fig. 8B). Sternum darker than carapace. Abdomen whitish gray, without pattern. Lengths of legs: I 3.23 (0.90+ 1.10+ 0.70+ 0.53), II 3.00 (0.90+ 1.00+ 0.63+ 0.47), III 2.14 (0.67+ 0.60+ 0.50+ 0.37), IV 3.57 (0.97+ 1.33+ 0.80+ 0.47); tibia spines: 2-2-1-1; Tm I: 0.64; Tm IV present.   
 Male palp (Figs. 8 E-G): Tibia short with two small dorsal apophyses. Tibia trichobothria: one prolateral and two retrolateral. Paracymbium U-shaped, distal part with thumb-like process apically. Protegulum (PT) sac-shaped with some small papillae at tip. In ventral and prolateral view, palp dominated by large lamella characteristica, posterior part horn-shaped, anterior part divided into two large sclerotic partly covering spiral embolus. Embolus spiraling more than one circle and then turning back abruptly.   
 Description of female. – Total length: 2.97. Carapace: 1.33 long, 0.93 wide. Abdomen: 2.0 long, 1.43 wide. Carapace unmodified. Chelicerae without tooth-like process on front face. Lengths of legs: I 3.24 (0.90+ 1.07+ 0.77+ 0.50), II 3.00 (0.87+ 1.00+ 0.70+ 0.43), III 2.47 (0.77+ 0.73+ 0.60+ 0.37), IV 3.33 (0.93+ 1.10+ 0.80+ 0.50); tibia spines: 2-2-1- 1; Tm I: 0.69; Tm IV present. Other somatic characters as in male.   
 Epigynum (Figs. 8 J-K): Simple and half round. Ventral plate convex, covering the shallow atrium. Dorsal median plate partly exposed with posterior margin slightly upwards. Inner course as seen in dorsal view (Fig. 8K), complex and difficult to trace.   
 Distribution. – Russia, China, Korea, Japan and Vietnam (Ha Jiang, Cao Bang and Son Tay).
description: Published as part of Tu, Lihong & Li, Shuqiang, 2004, A Preliminary Study Of Erigonine Spiders (Linyphiidae: Erigoninae) From Vietnam, pp. 419-433 in Raffles Bulletin of Zoology 52 (2) on pages 428-432, DOI: 10.5281/zenodo.13244432