Dendrolycosa icadia ( L. Koch 1876 )

Jäger, Peter, 2011, Revision of the spider genera Nilus O. Pickard-Cambridge 1876, Sphedanus Thorell 1877 and Dendrolycosa Doleschall 1859 (Araneae: Pisauridae), Zootaxa 3046, pp. 1-38 : 32-34

Dendrolycosa icadia ( L. Koch 1876)

Figs 147–149 , 153–158 , 167 : 19

Dolomedes icadius L. Koch 1876: 859 , pl. 73, fig. 5 (Description of female; 4 female syntypes from Australia, Peak Downs, Museum Godeffroy, ZMB 3464, examined. 1 subadult male syntype from Australia, Rockhampton, Museum Godeffroy No. 14628, ZMH, examined, 1 subadult female syntype from Australia, Rockhampton, Museum Godeffroy No. 14628, ZMH, examined).

Nilus icadius ,— Simon 1898a: 290 (Transferred from Dolomedes ). Rainbow 1911: 262.

Dendrolycosa icadius ,— Davies 1982: 479 (Transferred from Nilus ).

Diagnosis. Medium sized spiders with body length of 11.2–13.4 mm (females) and colour pattern A ( Figs 147– 149 ). Carina with incision of anterior margin semicircular or broad U-shaped. Anterior rims roughly transversal to body axis. Spermathecal heads multi-lobed, reaching anterior half of internal duct system ( Figs 153–158 ).

Redescription. Female (1 syntype ZMB 3464). PL 5.2, PW 4.2, AW 2.3, OL 7.5, OW 4.3. Eye diametres: AME 0.22, ALE 0.25, PME 0.25, PLE 0.25. Eye interdistances: AME–AME 0.18, AME–ALE 0.12, PME–PME 0.18, PME–PLE 0.34, AME–PME 0.28, ALE–PLE 0.48, clypeus AME 0.27, clypeus ALE 0.30. Leg and pedipalpus measurements: pedipalpus 6.3 (2.0, 0.9, 1.4, -, 2.0); leg I 20.6 (5.9, 2.5, 5.3, 4.7, 2.2); leg II 20.5 (6.9, 2.4, 5.1, 4.8, 2.2); leg III 17.1 (5.2, 2.2, 4.0, 4.0, 1.7); leg IV 20.2 (5.8, 2.2, 4.8, 5.2, 2.2); leg formula 1243. Spination: palp: femur 141, patella 120, tibia 1101, tarsus 1013; Femur I 435, II 535, III 435(534), IV 333; Patella I–IV 121, Tibia I–II 2228, III–IV 2226; Metatarsus I–II 2027, III 3037, IV 3038 (metatarsi I–IV with distal median ventral spine). Chelicerae with 3 anterior (median largest) and 3 equally sized posterior teeth. Palpal claw with 9 teeth, paired leg claws with 14–15 teeth.

Copulatory organ as in diagnosis. Epigynal field wider than long, with one pair of slit sense organs antero-laterally (one female exhibiting an additional smaller slit sense organ). Central part of middle field with deep impression, situated anterior and posterior of carina. Medium septum posteriorly broad. Few wrinkles in posterior lateral lobes of epigyne. Internal duct system with broad copulatory ducts, roughly kidney-shaped. Base of spermathecae ellipsoid, large, and covered slightly by copulatory ducts at one side ( Figs 153–158 ). Colour in ethanol ( Figs 147– 149 ): yellowish brown with colour pattern A, specimens faded. Dorsal prosoma with 2 broad bright submarginal bands and a narrow line between fovea and eyes. Sternum and ventral coxae yellowish brown, without pattern. Gnathocoxae yellowish brown, brighter distally; labium yellowish brown with white distal lip. Chelicerae yellowish brown. Palp and legs yellowish brown without pattern. Dorsal opisthosoma with characteristic dark patch in anterior half and a lighter brown folium, the latter with undulating lateral margins in posterior half and indistinct in two of the four adult female syntypes. Ventral opisthosoma brighter with 4 longitudinal lines of indistinct muscle sigilla.

Male: unknown.

Natural history. According to Koch (1876), specimens from Rockhampton were found under stones (Daemel leg.), which would be an unusual stratum, since most of observed webs have been found in higher strata of the vegetation.

Distribution. Koch (1876) mentions Rockhampton, Port Mackay, Bowen and Peak Downs as locality records ( Fig. 167 : 19).

Figures

FIGURE 167. Records of Dendrolycosa spp. 1 Tanzania: Moshi. 2 – 5 India (2 N Gujarat; 3 Bangalore; 4 Bobbili; 5 Darjeeling). 6 Burma: Tharrawaddy, Kyeikpadem. 7 China: Yunnan: Menglun. 8 – 9 Laos (8 Vientiane; 9 Tad Fane). 10 South Vietnam. 11 – 12 Philippines (11 Luzon; 12 Mindanao). 13 – 16 Indonesia (13 Sumatra: Bukkittinggi, Acer Manjon; 14 Java: Tengah; 15 Ambon; 16 Maluku Islands). 17 New Guinea (no exact locality is known). 18 – 19 Australia: Queensland (18 Cape York; 19 Rockhampton). 20 New Caledonia: Loyalty Islands.

FIGURES 147 – 152. Dendrolycosa spp., habitus (147, 150 dorsal view; 148, 151 ventral view; 149 frontal view; 152 lateral view). 147 – 149 Dendrolycosa icadia (L. Koch 1876), female syntype from Peak Downs. 150 – 152 Dendrolycosa ornata (Berland 1924), holotype, female from New Caledonia, Loyalty Islands.

FIGURES 153 – 161. Dendrolycosa spp., female copulatory organs (153, 156 – 159 epigyne, ventral view; 154, 160 vulva, dorsal view; 155, 161 schematic course of internal duct system). 153 – 158 Dendrolycosa icadia (L. Koch 1876), female syntypes from Peak Downs. 159 – 161 Dendrolycosa ornata (Berland 1924), holotype, female from New Caledonia, Loyalty Islands.