Cambonilla symphonia Jocqué & Jocque & Stock & Rin & Henrard 2019, gen. et sp. nov.

Cambonilla symphonia Jocqué & Henrard gen. et sp. nov. urn:lsid:zoobank.org:act: 51939E05-B3E2-41DD-BB97-E12D1D395FE7

Figs 3A, 4 G–I, 8, 9, 10, 11

Diagnosis

The male of Cambonilla symphonia gen. et sp. nov. is recognized by the presence of stridulating organs on Fe I and II, and by the strong tapered RTA on the palp, the female by the epigyne with very deeply incised central plate.

Etymology

The species name ‘ symphonia ’ is a noun in apposition meaning ‘orchestra’ and refers to the four stridulating organs on the femora of the male.

Material examined

Holotype CAMBODIA • ♂; Kratie province, Base Camp 4; 12.5460° N, 105.9881° E; 5 May 2018; M. Jocque and W. Stock leg.; pitfall set 1; RBINS IG 33.889 /007 (=CA15).

Paratypes

CAMBODIA • 1 ♀; Kratie province, Base Camp 3; 13.0199° N, 106.0395° E; 10 May 2018; M. Jocque and W. Stock leg.; rainforest, pitfall set 3; RBINS IG 33.889 /008 • 2 ♂♂; Kratie province, Base Camp 4; 13.0198° N, 105.9268° E; 5 May 2018; M. Jocque and W. Stock leg.; rainforest, pitfall set 1; RBINS IG 33.889 /009.

Description

Male holotype

TOTAL LENGTH. 4.83. Carapace: length 2.13, width 1.63, height 0.85.

COLOUR (Fig. 8 A–D). Carapace uniform chestnut brown; chelicerae, chilum and sternum brownish orange; endites and labium pale brown with whitish distal margin; legs: Cx and Tr pale brown; Fe dark brown; remainder yellow except T IV medium greyish brown; abdomen: dorsum with two reniform pale patches in front overlaid by translucent pale reddish brown, oval scutum followed by numerous small white spots on dark background, venter sclerotized orange in front of epigastric furrow with short tubular extension around pedicel; remainder with sepia marbling on pale background; spinnerets whitish; sides with dark grey marbling.

CARAPACE. Rugose, with sparse, thin, pale, branched setae; one large seta between AME.

STERNUM (Fig. 8B). Shield shaped; 0.92 wide, 0.85 long. Posterior tip shallowly indented; with rounded depressions in front of coxae; no precoxal sclerites.

CHILUM. A single sclerite 0.12 high, 0.25 wide, with central protrusion.

EYES. ALE 0.12; AME 0.13; PLE 0.10; PME 0.13; ALE-AME 0.10; AME-AME 0.07; PLE-PME 0.13; PME-PME 0.08. Clypeus 0.41 high.

LEGS. Trochanters III and IV with anterior ventral indentation; Fe I and II with basal dorsal stridulation file (Fig. 4 G–H); without hinged setae.

ABDOMEN. Venter with dispersed thick setae in posterior half (Fig. 8D); with short tubular extension around pedicel, ventral margin slightly indented (Fig. 8 A–B).

MALE PALP (Figs 8 E–F, 10A–B). T with a strong, straight, tapered RTA and retrobasal triangular swelling; cymbial fold slightly shorter than half the cymbium’s length; embolus with large base, originating at an angle of 270° to longitudinal axis; bifid from base onwards; MA with basal tooth and beak shaped distal extremity pointing prolaterad; C short, tapered, grooved.

Female (RBINS IG 33.889/008)

TOTAL LENGTH. 6.60. Carapace: length 2.56, width 1.56, height 1.14.

COLOUR (Fig. 9 A–C). Carapace uniform dark brown; chelicerae medium brown without pale tip; chilum medium brown. Endites and labium medium brown with pale frontal margin. Sternum uniform medium brown. Legs: Cx yellowish brown, with white sital margin; Tr yellowish brown, F dark brown, remainder medium brown; palp medium brown, F slightly darker. Abdomen: dorsum anteriorly with two well separated reniform spots, without scutum overlay, followed by pale transverse band, small, pale patches and large patch in front of spinnerets; venter with sclerotized band in front of epigastric furrow, remainder with sepia marbling on pale background, spinnerets yellow.

CARAPACE. Rugose, with sparse, thin, pale, branched setae; a few large setae between eye region and fovea.

EYES. ALE 0.12; AME 0.15; PLE 0.13; PME 0.15; ALE-AME 0.10; AME-AME 0.05; PLE-PME 0.23; PME-PME 0.08. Clypeus 0.51 high.

CHILUM. A single sclerite 0.12 high, 0.33 wide, with central protrusion.

STERNUM (Fig. 9B) Shield shaped; 1.14 wide, 1.21 long. Posterior tip truncate; with rounded depressions in front of coxae; no precoxal sclerites.

LEGS. Tr III and IV posteriorly concave. Hinged hair on T I and II.

PALPAL TARSUS. With toothed claw turned inward over 30°, eight dispersed spines.

ABDOMEN. Without frontal tubular extension. Venter of abdomen without PVS or thick setae (Fig. 9C).

EPIGYNE (Figs 9D, 10C). A broad sclerotized area with narrow, horseshoe shaped plate, delimiting central pit.

Distribution

Known from two localities along the Mekong River in Cambodia (Fig. 11).