Drymusa canhemabae, Brescovit, Antonio D., Bonaldo, Alexandre B. & Rheims, Crsitina A., 2004

Brescovit, Antonio D., Bonaldo, Alexandre B. & Rheims, Crsitina A., 2004, A new species of Drymusa Simon, 1891 (Araneae, Drymusidae) from Brazil, Zootaxa 697, pp. 1-5 : 2-4

Drymusa canhemabae n. sp.

( Figs. 1–5 )

Types. Male holotype from Igarapé (Creek) Mutum (02° 36’ 10.6” S; 56° 12’ 25.8” W), Jurutí River plateau, Jurutí, Pará, Brazil, Sept. 14.2002, A. B. Bonaldo col. deposited in MPEG 0 408. Female paratype from Capiranga­Mutum Road (02° 33’ 07.2” S; 56° 13’ 06.2” W), Jurutí River plateau, Jurutí, Pará, Brazil, Sept. 11 –16.2002., deposited in MPEG 0 410.

Etymology. The specific name is a term taken from the Brazilian “Tupi­guarani” Indian language, which means “one who can disappear”.

Diagnosis. The males of Drymusa canhemabae n. sp. resemble those of D. serrana Goloboff & Ramírez by the small and rounded tegulum and laminar embolus of the male palp ( Goloboff & Ramírez 1991: 694, figs. 6–7). They differ by the shorter and distally twisted embolus ( Figs. 2–3 ). The females are distinguished by the presence of a sclerotized plate below the epigastric furrow and by the triangular epigynal pouch ( Fig. 4 ).

Description. Male (holotype). Carapace orange with brown lateral margins and median V­shaped brown pattern on posterior half. Chelicerae orange. Labium brownish yellow. Endites slightly lighter than labium. Sternum brownish. Legs and pedipalps pale yellow with very faint brown pigmentation, irregularly distributed along entire leg. Abdomen gray, with six transversal irregular bands. The anterior two slightly W­shaped and thicker ( Fig. 1 ). Total length 2.16. Carapace flattened, 1.00 long, 0.82 wide. Eye diameters: PME 0.08, ALE 0.09, PLE 0.09. Lateral eyes on a tubercle. Chelicerae with two small retromarginal teeth, promarginal carina and subapical hyaline keel. Labium 0.20 long, 0.16 wide. Sternum 0.56 long, 0.56 wide. Leg measurements: I: femur 2.00/ patella 0.30/ tibia 2.14/ metatarsus 2.14/ tarsus 0.62/ total 7.20; II: 1.90/ 0.30/ 1.96/ 2.00/ 0.62/ 6.78; III: 1.54/ 0.28/ 1.40/ 1.54/ 0.54/ 5.30; IV: 1.90/ 0.32/ 1.94/ 2.06/ 0.66/ 6.88. Claws pectinate. Male palp with small, truncated cymbium ( Figs. 2–3 ). Bulb 0.34 long. Abdomen 1.16 long, 0.60 wide, covered with slender hairs.

Female (paratype). Coloration pattern as in male, but slightly darker. Total length 2.66. Carapace flattened, 1.14 long, 0.94 wide. Eye diameters: PME 0.07, ALE 0.08, PLE 0.09. Lateral eyes on a tubercle. Chelicerae as in male. Labium 0.18 long, 0.28 wide. Sternum 0.60 long, 0.60 wide. Leg measurements: I: femur 2.08/ patella 0.32/ tibia 2.28/ metatarsus 2.24/ tarsus 0.72/ total 7.64; II: 1.96/ 0.32/ 2.02/ 2.08/ 0.68/ 7.06; III: 1.58/ 0.30/ 1.46/ 1.60/ 0.60/ 5.54; IV: 1.94/ 0.32/ 1.98/ 2.00/ 0.66/ 6.90. Sclerotized plate below the epigastric furrow folded laterally inwards forming large pear­shaped rim ( Figs. 4–5 ). Vulva with small, oval spermathecae and long, coiled ducts ( Fig. 5 ). Abdomen 1.52 long, 0.90 wide, as in male.

Natural History. Both specimens were collected in dryland forest (“Terra Firme”). The dryland Forest at Jurutí plateau is classified as “submontane ombrophilous plateau forest”. The holotype was collected with a beating tray, in low vegetation, in a one hectare plot of primary forest with low disturbance degree. The paratype was collected in another plot, 20 kilometres from the first, using pitfall traps. This plot was composed of disturbed secondary forest, in which dry leaves of embaúba trees ( Cecropia sp., Moraceae ) were the main litter component. This might indicate that the species is capable of occupying at least two microhabitats, the litter layer and the low foliage.

Distribution. Only known from the type locality.

Material examined. Only the types.

Figures

FIGURES 1 – 5. Drymusa canhemabae n. sp. 1 – 3. Male (1. body, dorsal view; 2. left palp, prolateral view; 3. left palp, retrolateral view); 4 – 5. Female genitalia (4. epigynum, ventral view; 5. vulva, dorsal view). Scale bars: 0.5 mm.