Lamponega arcoona, PLATNICK, 2000

PLATNICK, NORMAN I., 2000, A Relimitation And Revision Of The Australasian Ground Spider Family Lamponidae (Araneae: Gnaphosoidea), Bulletin of the American Museum of Natural History 2000 (245), pp. 1-328 : 149-150

Lamponega arcoona , new species Figures 334–337 , 341 ; map 40

TYPE: Male holotype from Arcoona Creek, 2 km NE Owieandana HS, Gammon Ranges National Park , 308269S, 1388589E, South Australia (May 6, 1989; J. Forrest), deposited in SAM ( N1996 /279) .

ETYMOLOGY: The specific name is a noun in apposition taken from the type locality.

DIAGNOSIS: Males and females have not been collected together, but are matched here because of their similar sternal modifications. Males have a less dramatically elevated sternum than do those of L. forceps or L. ser­ pentine (fig. 341); females have a presumably distinctive epigynal midpiece (fig. 336).

MALE: Total length 3.6. Abdominal dorsum gray, with white markings restricted to tiny spot above spinnerets, four circular muscle impressions, and lateral lines; legs brown, unmarked. Palpal femur short, thick, unmodified; tibia without retrolateral apophysis, with slight retrodistal excavation (fig. 335); cymbium not basally excavated; tegulum not extending beyond tip of tibia, but with pronounced bulge on prolateral side; embolus with long, arched tip (fig. 334).

FEMALE: Total length 4.2. Coloration as in male. Epigynum with narrow, scapelike median plate extending from anterior margin for about two­thirds of epigynal length (fig. 336); spermathecae bipartite, posterior portions curled (fig. 337).

OTHER MATERIAL EXAMINED: South Australia: 31 km NW Renmark , 338599S, 1408309E, May 2–June 8, 1995, intercept trap (K. Pullen, QMB), 1 ?; Yardea Station, 29 km S Moonarie, 328149S, 1358499E, Oct. 3, 1988, pitfall (D. Hirst, SAM N1997 /121), 1/. Western Australia: Monkey Mia, Peron Peninsula , 258479S, 1138419E, Nov. 8, 1998 (V. Ovtsharenko, AMNH), 1 /; Peak Charles , 328539S, 1218109E, Aug. 2, 1992, salmon gum litter (M. Cowan, WAM 96 /240), 1 /; York , 318539S, 1168439S, Nov. 2, 1991, pow­ der bark/mallet leaf litter (J. Bannister, WAM 96 /241), 1 /; 10 km SW York , 318589S, 1168429S, Dec. 5, 1996, elev. 430 m (N. Platnick, R. Raven, V. Ovtsharenko, K. Catley, AMNH), 1 /.

DISTRIBUTION: Southern Australia (map 40).

Figures

Figs. 334–337. Lamponega arcoona, new species. 334. Left male palp, ventral view. 335. Same, retrolateral view. 336. Epigynum, ventral view. 337. Same, dorsal view.

Figs. 341–343. 341. Lamponega arcoona, new species, cephalothorax, lateral view. 342. L. serpentine, new species, left male palp, ventral view. 343. Same, retrolateral view.