Anelosimus agnar Agnarsson

Agnarsson, Ingi & Zhang, Jun-Xia, 2006, New species of Anelosimus (Araneae: Theridiidae) from Africa and Southeast Asia, with notes on sociality and color polymorphism, Zootaxa 1147, pp. 1-34 : 28-31

Anelosimus agnar Agnarsson n. sp.

( Figs 4 A–B, 18 A–B)

Types

Female holotype and paratype (1 Ψ) from Malaysia, Johor, Teluk Mahkota, 1 ° 54 ’0”N, 104 ° 6 ’ 14.4 ”E, altitude 0–5 m, 25.– 26.v. 2005, W. Maddison, D. Li, I. Agnarsson, J. X. Zhang, deposited in NMNH.

Description

Female (holotype): Total length 2.40. Prosoma 0.95 long, 0.80 wide, light brown, cephalic region darker. Sternum 0.60 long, 0.50 wide, light brown. Opisthosoma 1.30 long, 1.20 wide. Pattern as in other Anelosimus , dark (bright red in live specimens) dorsal notched folium, edged by a narrow white rim. Eyes subequal in size about 0.08 in diameter. Clypeus height about 1.8 times AME diameter. Leg I femur 1.20 patella 0.35, tibia 1.05, metatarsus 0.85, tarsus 0.40. Femur I about 6 times longer than wide. Leg formula 1243. Leg pale yellowish, femora I and II distinctly darkened (bright red in live specimens), except at base, dorsally with yellowish longitudinal streaks. 3–5 small trichobothria dorsally on all tibia, 3–4 on tibia I–III, 4–5 on IV. 3 dorsal trichobothria on palpal tibia.

Epigynum as in Figures 18 A–B.

Male: unknown.

Va r i a t i o n

Total length from 2.05–2.40, femur I from 1.00– 1.20. The paratype is much paler than the type specimen, with light dorsal folium on the opisthosoma, and only a small portion of femur I darkened, lacking red coloration ( Figs 4 A–B).

Natural history

Type material was collected from small webs at tips of branches in a forest at the beach. The paratype female was carrying an egg sac ( Figs 4 A–B) that contained 22 eggs.

Phylogenetics

Anelosimus agnar n. sp. has not been included in a phylogenetic analysis, but preliminary molecular data suggests it forms a clade with A. linda n. sp., together in a placement as indicated for the ‘ agnar grou’p in Fig. 1.