Arctosa delaportei Omelko & Marusik, 2022

Omelko, Mikhail M., 2024, New data on wolf spiders (Araneae: Lycosidae) from Laos, Raffles Bulletin of Zoology 72, pp. 235-251 : 236-237

Arctosa delaportei Omelko & Marusik, 2022

(Figs. 1–5, 52–53)

Arctosa delaportei Omelko & Marusik, 2022: 398 , f. 1, 7–8, 15–17, 26, male.

Material examined. 1 female ( ZMMU), LAOS, Vientiane Prov., env. of Nam-Lik Eco-Village , 18°36′53.18″N 102°24′31.87″E, pitfall traps at forest’s edge near paddy field, coll. M.M. Omelko, 22–26 May 2016 .

Diagnosis. By the trapezoidal septum with short, wide stem and general conformation of epigyne, female of Arctosa delaportei is related to that of A. gougu Chen & Song, 1999 , A. springiosa , and A. ziyunensis Yin, Peng & Bao, 1997 . Besides the similarity in its epigyne’s structure, the new species is close to A. springiosa in having very similar dark body colouration in dorsal view (cf. Fig. 1 and fig. 13B in Wang et al. (2021)). All these species are known from China ( A. springiosa from China and Laos). Females of A. delaportei may be distinguished from A. gougu and A. ziyunensis by the presence of large round glands (Gl) on its copulatory ducts (vs. absent; cf. Figs. 3–4 and fig. 1A in Pan et al. (2016), fig. 406d in Yin et al. (2012)). It can be easily differentiated from A. springiosa by the strongly curved copulatory ducts (CD); (vs. straight; cf. Fig. 5 and fig. 13H in Wang et al. (2021)).

Description. Female (Figs. 1–2). Total length 5.47. Carapace 2.51 long, 1.58 wide. Opisthosoma 2.81 long, 1.65 wide. Colouration. Carapace dark brown, lacking distinct pattern, slightly lighter in central part. Lateral bands absent. Fovea almost invisible. Clypeus brown, chelicerae brown. Chelicera with 3 pro- and 3 retromarginal teeth. Labium and endites brown with yellowish outer edge. Sternum dark brown.

Eye sizes and interdistances: AME 0.09, ALE 0.08, PME 0.21, PLE 0.15; AME–AME 0.06, AME–ALE 0.02, PME– PME 0.10, PME–PLE 0.12, AME–PME 0.05, ALE–PME 0.05; clypeus height 0.08.

Palpal femur dark brown; rest of segments brown. For palp and legs measurements see Table 1. Coxae I–IV yellow; femora I dark brown with yellow distal part, II–IV dark brown with yellow proximal part; patellae I–IV dark brown; tibiae I–IV dark brown with yellow ring in middle; metatarsi I–III dark brown with poorly visible annulation, IV dark brown with clearly visible annulation; tarsi I–IV light brown. For spination of legs I–II see Table 2.

Abdomen dorsally dark grey, with poorly visible cardiac mark and irregular spots of short white setae. Lateral sides of the opisthosoma greyish. Ventral part dark brown. Spinnerets yellow.

Epigyne as shown in Figs. 3–5. Septum (Se) more or less trapezoidal in shape, covered with short, thick setae, septal stem (SS) short and wide. Hoods (Ho) large. Receptacles (Re) large, drop shaped, spaced by a distance 2 times their width. Copulatory ducts (CD) comparatively short, curved with pair of large round glands (Gl) clearly visible even on non-macerated epigyne.

Notes. Arctosa delaportei was described on the basis of two males only, the female was reported as unknown ( Omelko & Marusik, 2022). While further studying spiders collected in Laos, I unexpectedly found a single female of this species which was lost among other wolf spiders during initial sorting. Correctness of male/female matching is confirmed by: 1) the fact that the female was collected in the same locality and habitat as the males 2) both sexes were collected during the

RAFFLES BULLETIN OF ZOOLOGY 2024

Figs. 1–5. Habitus (1–2) and epigyne (3–5) of Arctosa delaportei , female. 1, 5 – dorsal; 2, 3, 4 – ventral. Scale: 1 mm (1–2), 0.2 mm (3–5). Abbreviations: CD – copulatory duct, FD – fertilisation duct, Gl – gland, Ho – hood, Re – receptacle, Se – septum, SS – septal stem.

same period of the year (summer) and 3) the female has the exact same colouration as the male.

Distribution. Type locality in Laos only ( Figs. 52–53 ).

Figures

Figs. 52–53. Collecting localities of (1) Arctosa delaportei Omelko & Marusik, 2022, Trochosa bannaensis Yin & Chen, 1995, T. ruricoloides Schenkel, 1963, Wadicosa daliensis Yin, Peng & Zhang, 1997, (2) Pardosa zhishengi, new species., T. ruricoloides.