Robusticoelotes, WANG, 2002

WANG, XIN-PING, 2002, A Generic-Level Revision Of The Spider Subfamily Coelotinae (Araneae, Amaurobiidae), Bulletin of the American Museum of Natural History 2002 (269), pp. 1-150 : 126-129

ROBUSTICOELOTES , NEW GENUS

TYPE SPECIES: Tegenaria pichoni Schenkel, 1963 .

ETYMOLOGY: The generic name is derived

from Coelotes and the strongly developed patellar apophyses, conductor, and embolus, and is masculine in gender.

DIAGNOSIS: Females resemble Ambanus in having a large epigynal atrium, broad copulatory ducts, and in lacking epigynal teeth, but have long, anteriorly extended spermathecae (figs. 349, 350). Males can be easily recognized by the presence of three patellar apophyses and the strongly modified retrolateral surface of the palpal tibia (figs. 351– 354). Both sexes have six or seven promarginal and five or six retromarginal teeth (fig. 356), whereas most coelotines have three promarginal and less then four retromarginal teeth.

DESCRIPTION: See description of type species (below).

DISTRIBUTION: China (map 15).

COMPOSITION: Only R. pichoni .

Robusticoelotes pichoni (Schenkel), new

combination

Figures 349–359

Tegenaria pichoni Schenkel, 1963: 277 , fig. 157a–

d (1 male and 1 female type from Hangtscheou,

Tschekiang, China, in MNHN, examined). –

Chen and Zhang, 1991: 191, fig. 191; – Song et

al., 1999: 360, figs. 209I, 209J, 209P, 209Q.

DIAGNOSIS: This species can be easily recognized by lacking epigynal teeth, the broad atrium, the broad copulatory ducts, the large, anteriorly situated spermathecal heads, and the long, slender spermathecae of females (figs. 349, 350), and males by having three patellar apophyses, the tibial modification, the strong, spiral, bifid conductor, the broad, membranous median apophysis, and the strong embolus (figs. 351–354).

DESCRIPTION: Total length 6.01–8.44. From front, anterior eye row slightly procurved, posterior row procurved; AME, ALE, PLE subequal or ALE slightly larger, PME slightly smaller; AME­AME about AME radius, AME­ALE and ALE­PLE close together, PME­PLE wider than their diameter, PME­

PME shorter than their diameter. Clypeal height roughly twice AME diameter or slightly shorter; chilum divided, elongated (fig. 355). Chelicerae with six or seven promarginal and five or six retromarginal teeth (fig. 356). Labium slightly longer than wide. Length of female first leg patella + tibia shorter than carapace length.

Tarsal organ situated close to distal end of tarsus, anterior of distalmost trichobothrium (figs. 357–359). Spinnerets not examined.

Epigynum without teeth; atrium large, with apparent anterior and lateral atrial margins; lateral atrial margins convex toward each oth­ er; hoods posteriorly situated; copulatory duct broad; spermathecal heads large, situated anteriorly; spermathecae stalks long, slender, widely separated, not convoluted, covered by copulatory ducts in dorsal view; spermathecal bases more or less elongated, not convoluted (figs. 349, 350). Male palp with three patellar apophyses, two strong, one small; RTA short, with distal end not extended; lateral tibial apophysis present; lateral tibial surface strongly modified with lobes and concavity; cymbial furrow short; conductor strong, broad, spiral, with bifid apex; conductor lamella less developed; conductor dorsal apophysis short; median apophysis membranous, broad, not spoonlike; embolus basal in origin, strong, long (figs. 351–354).

MATERIAL EXAMINED: CHINA: Zhejiang: Hangtscheou ( Hangzhou ), 1925, 1 male and 1 female type ( MNHN, B­1979) ; Lin­an , October 19, 1974, 1 male (C. D. Zhu, NBUMS). Jiangsu: Nanking, April 1925, 1 female (C. Ping, AMNH) .

DISTRIBUTION: China (Zhejiang, Jiangsu).

Figures

Figs. 349, 350. Robusticoelotes pichoni (Schenkel), female. 349. Epigynum. 350. Vulva.

Figs. 351, 352. Robusticoelotes pichoni (Schenkel), male palp. 351. Prolateral view. 352. Ventral view.

Figs. 353–356. Robusticoelotes pichoni (Schenkel), male palp. 353. dorsal view. 354. Retrolateral view. 355. Female, carapace, front view. 356. Female, chelicera, ventral view.

Figs. 357–359. Robusticoelotes pichoni (Schenkel), female. 357. Tarsus, showing position of tarsal organ (double arrows) and the distalmost trichobothrium (single arrow). 358. Tarsal organ. 359. Trichobothrium.