Cambonilla securicula Jocqué, 2019

Jocqué, Rudy, Jocque, Merlijn, Stock, Willem, Rin, Naroeun & Henrard, Arnaud, 2019, The new Southeast Asian genus Cambonilla gen. nov. (Zodariidae, Araneae): ‘ bis repetita placent’, European Journal of Taxonomy 501, pp. 1-24 : 12-17

Cambonilla securicula Jocqué gen. et sp. nov. urn:lsid:zoobank.org:act:00D14C53-6330-42BA-A2F1-63C760959CF3

Figs 2 , 3 B–F, 4A, 5, 6, 7, 11

Diagnosis

The male of Cambonilla securicula sp. nov. is recognized by the presence of small lateral scuta behind the epigastric fold and by the male palp in which both the MA and the C are hatchet shaped. The female has a remarkable, small, modified spine on the tibia of the palp and a characteristic epigyne in which the central plate has a concave anterior and a straight posterior margin.

Etymology

The species name ‘ securicula ’ meaning hatchet, is a noun in apposition referring to the shape of both the MA and the C.

Material examined

Holotype CAMBODIA • ♂; Kratie Province, Base Camp ; 13.00986° N, 106.0640° E; 16 May 2018; M. Jocque & W. Stock leg.; Herpetology pitfall in forest; RBINS IG 33.889 /001.

Paratypes

CAMBODIA • 3 ♂♂; same data as for holotype; RBINS IG 33.889 /002(=CA3) • 2 ♂♂, 1 ♀; 17 May 2018; same data as preceding; RBINS IG 33.889 /003 • 4 ♂♂ 2 ♀♀; 13 May 2015; same data as preceding; RBINS IG 33.889 /004 • 4 ♂♂; Kratie Province, Base Camp 4; 13.0198° N, 105.9268° E; 5 May 2018; M. Jocque and W. Stock leg.; pitfall set 1; RBINS IG 33.889 /005 • 1 ♂; Kratie Province; 13.00986° N, 106.06395° E; 10 May 2018; M. Jocque and W. Stock leg; pitfall set 3; RBINS IG 33.889 /006 .

Other material

CAMBODIA • 1 ♂, 1 ♀; Kratie Province, Base Camp ; 13.00986° N, 106.0650° E; 6–11 May 2018; M. Jocque and W. Stock leg.; forest, by hand; RBINS IG 33.889 /010 • 2 ♂♂; Kratie Province, Base Camp 1; 12.61788° N, 106.0 0 296° E; 10 Apr. 2018; M. Jocque and W. Stock leg.; flooded forest on sand, Malaise trap, by hand; RBINS IG 33.889 /011 .

LAOS – Vientiane Province • 1 ♀; Vientiane, Ban Don Ma Khay ; 18.08384° N, 102.1713° E; 13 Jun. 2013; P. Jäger leg.; 186 m, secondary forest, at night by hand; SMF – Champasak Province • 1 ♀; Muang Bachieng, That Paxuam ; 15.17653° N, 105.9225° E; 3.Aug. 2016; P. Jäger and S. Munnich leg.; 197 m,secondary forest with single primary trees, by night, by hand; SMF – Khammouan Province • 1 ♀; Ban Tathot ; 17.62361° N, 105.1466° E; 18–19 Fev. 2003; P. Jäger leg.; ca 180 asl, village and neighbourhood, shrubs and rocks, night and evening; SMF .

Description

Male holotype

TOTAL LENGTH. 6.96. Carapace: length 3.48, width 2.70, height 2.00.

COLOUR ( Fig. 5 A–D). Carapace uniform dark chestnut brown; chelicerae dark brown with orange extremity and white tip; chilum medium brown; sternum medium brown; labium and endites medium brown, paler towards anterior white tip; legs: Cx and Tr medium brown, Fe dark brown, P and T greyish brown, Mt and t pale brown.Abdomen: dorsum with pale reniform patches fused in front and at posterior end, overlaid by reddish orange, translucent oval scutum; further backward with five transverse bands and pale patch above spinnerets on dark background; venter sclerotized in front of epigastric furrow and yellow sclerotized area on either side behind epigastric furrow; remainder marbled with sepia on pale background; spinnerets pale brown.

CARAPACE GRANULATED. With sparse cover of thin, pale, branched setae.

EYES. ALE 0.16; AME 0.20; PLE 0.13; PME 0.13; ALE-AME 0.10; AME-AME 0.07; PLE-PME 0.12; PME-PME 0.12. Clypeus 0.66 high.

CHILUM. 0.21 high, 0.43 wide, with slightly concave inferior side, centre protruding.

STERNUM ( Fig. 5B ). Shield shaped, granular; 1.42 wide, 1.49 long. Posterior tip shallowly indented; with rounded depressions in front of coxae; no precoxal sclerites.

LEGS. Trochanters III and IV with anterior ventral indentation; dorsal hinged hair on base of T I and II. Cx and ventral side of F granular.

ABDOMEN. With PVS in ill-defined group and dispersed thick setae in posterior half ( Fig. 5D ); with short tubular extension around pedicel, its anterior margin ventrally indented ( Fig. 5B ).

MALE PALP ( Figs 4 C–F, 5E–F, 7A–B). T with strong, slightly sinuous, downcurved, blunt RTA; cymbial fold as long as half the cymbium’s length; embolus with large base, originating at an angle of 270° to longitudinal axis, halfway with short, flat bifurcation, distal end corkscrew shaped; MA hatchet-shaped with short ventral tooth at base; C with short, sharp, flat, distal protrusion, pointing prolaterad.

Female (RBINS IG 33.889/003)

TOTAL LENGTH. 7.31. Carapace: length 3.05, width 2.06, height 1.42.

COLOUR ( Fig. 6 A–C). Carapace uniform dark brown; chelicerae medium brown with pale tip; chilum medium brown. Endites and labium medium brown with pale frontal margin. Sternum uniform medium brown. Legs I: Cx medium brown, Tr pale brown, F dark brown, remainder yellowish orange; palp medium brown except T yellowish orange. Abdomen: dorsum with two ill-defined reniform spots touching in front, without scutum overlay, followed by small, faint, pale patches and large patch in front of spinnerets; venter with sclerotized band in front of epigastric furrow, without tubular extension, remainder marbled with sepia on pale background, spinnerets pale yellow.

CARAPACE. Rugose with sparse cover of branched setae.

EYES. ALE 0.18; AME 0.18; PLE 0.15; PME 0.13; ALE-AME 0.15; AME-AME 0.07; 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. 6B ). Shield shaped; 1.28 wide, 1.35 long. Posterior tip rounded; with rounded depressions in front of coxae; no precoxal sclerites.

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

FEMALE PALP. Tarsus with toothed claw turned inward over 30°, eight dispersed spines; tibia with short, sinuous prolateral spine ( Fig. 6F ).

ABDOMEN. Venter without PVS or thick setae ( Fig. 6C ).

EPIGYNE ( Figs 6 D-E, 9D). With wide rectangular plate, concave in front, posterior margin convex and thickened in the middle. Copulatory ducts with few whorls, ending in poorly delimited spermathecae near posterior end.

Variation

The abdominal venter of the female specimen from Ban Tathot (17.62361 °N, 105.1466 °E) is not marbled but has three dark, faint longitudinal lines.

Distribution

Known from lowland forest in Cambodia and Laos; all localities are along the Mekong river ( Fig. 11 ).

Figures

Fig. 2. Cambonilla securicula Jocqué gen. et sp. nov., male paratype (RBINS IG 33.889/002), scanning electron micrographs. A. Carapace, dorsal view. B. Branched setae near fovea. C. Carapace, lateral view. D. Eye region, frontal view. E. Chelicerae, ventral view. F. Trichobothrium on male palp, dorsal view. Scale bars A, C = 0.5 mm; B = 20 µm; D = 0.2 mm; E = 0.1 mm; F = 5 µm.

Fig. 3. Scanning electron micrographs. A. Cambonilla symphonia Jocqué & Henrard gen. et sp. nov., male paratype (RBINS IG 33.889/009). B–F. Cambonilla securicula Jocqué gen. et sp. nov. male paratype (RBINS IG 33.889/005) A. Tarsal claws of leg I, prolateral view.B.Tarsal claws of leg III, retrolateralview. C. Hinged hair on T I. D. Chisel shaped setae on Mt III. E. PVS, ventral view. F. As preceding, detail. Scale bars: A–B, D = 20 µm; C = 5 µm; E = 100 µm; F = 10 µm.

Fig. 5. Cambonilla securicula Jocqué gen. et sp. nov., male holotype. A. Habitus, dorsal view. B. Habitus, ventral view. C. Carapace, frontal view. D. Abdomen, posterior part, ventral view. E. Male palp, retrolateral view. F. Male palp, ventral view. Scale bars: A–B = 2 mm; C = 1 mm; D–F = 0.5 mm.

Fig. 4. Scanning electron micrographs. A–F. Cambonilla securicula Jocqué gen. et sp. nov., male paratype (RBINS IG 33.889/005). G–I. Cambonilla symphonia Jocqué & Henrard gen. et sp. nov., male paratype (RBINS IG 33.889/009). Scanning electron micrographs. A. Sternal depression. B. As preceding, detail. C. Male palp, lateral view. D. Chemosensitive setae on cymbium, lateral view. E. Male palp, ventral view. F. Embolus with bifurcation, prolateral view. G. Stridulating file on base of F I, prolateral view. H. As preceding, detail. Scale bars: A, G = 0.1 mm; B = 50 µm; C, E = 0.5 mm; D, H = 20 µm; E = 0.5 mm; F = 0.2 mm; G = 0.1 mm; H = 20 µm.

Fig. 6. Cambonilla securicula Jocqué gen. et sp. nov., female paratype (RBINS IG 33.889/003). A. Habitus, dorsal view. B. Habitus ventral view. C. Abdomen, posterior part, ventral view. D. Epigyne, ventral view. E. Epigyne, digested, dorsal view. F. Palp, dorsal view, arrow indicates modified prolateral spine on tibia. Scale bars: A–B = 5 mm; C = 1 mm; D–F = 0.2 mm.

Fig. 11. Distribution of Cambonilla securicula Jocqué gen. et sp. nov. (▲) and Cambonilla symphonia Jocqué & Henrard gen. et sp. nov. (▼).