Oecobius zagros, Zamani & Marusik, 2023

Zamani, Alireza & Marusik, Yuri M., 2023, New species and records of Oecobius Lucas, 1846 (Araneae: Oecobiidae) from Iran and Azerbaijan, Journal of Natural History (J. Nat. Hist.) 57 (37 - 40), pp. 1693-1709 : 1704-1706

Oecobius zagros sp. n.

( Figures 1I , 7 A–D , 8A–D )

Type material

Holotype ♂ ( MHNG), IRAN: Kermanshah Province: Dizgaran , 33.733333°N, 46.983333°E, 16 May 1974 (A. Senglet).

Etymology

The specific epithet is a noun in apposition, referring to a long mountain range in Iran, northern Iraq and south-eastern Turkey, in which the type locality of the new species is situated.

Diagnosis

In the general conformation of the male palp and particularly the shape of radical apophysis, the new species is most similar to O. ilamensis Zamani, Mirshamsi and Marusik, 2017 , a species so far known only from Ilam Province in western Iran (Zamani et al. 2017). The male palp of the new species differs from that of O. ilamensis by having straight, spine-like subterminal apophysis (St) (vs with bent tip) and abrupt tip of terminal apophysis (Ta) (vs finger-shaped) (compare Figure 7D and Zamani et al. 2017, fig. 1C).

Description

Male. Habitus as in Figure 1I . Total length 1.65. Carapace 0.60 long, 0.72 wide. Eye sizes: AME: 0.04, ALE: 0.06, PLE: 0.06, PME: 0.08. Carapace yellowish brown, with darker median and marginal stripes. Chelicerae, sternum, labium, and maxillae pale brown. Legs coloured as carapace, with faint annulations. Abdomen greyish brown and mottled with small guanine patches, with dark brown patches. Spinnerets light greyish brown. Measurements of legs: I: 2.27 (0.65, 0.27, 0.48, 0.49, 0.38), II: 2.29 (0.67, 0.25, 0.48, 0.48, 0.41), III: femur 0.67, patella 0.24, rest of the segments missing, IV: 2.56 (0.72, 0.28, 0.54, 0.61, 0.41).

Palp as in Figures 7A–D , 8A–D ; bulb oval in ventral view, ca 1.7 times longer than wide; sperm duct with small loop (Lo) in anterior part of tegulum; radix (Rx) long, with claw-like apophysis (Ra); subterminal apophysis (St) spine-like; terminal apophysis (Ta) long, with abrupt tip; ‘conductor̍ (Co) membranous, as long as wide; embolus (Em) claw-like, almost as long as subterminal apophysis.

Female. Unknown.

Distribution

Known only from the type locality in Kermanshah Province, western Iran ( Figure 9 ) . On the label, the locality is listed as Lorestan Province, while the coordinates refer to another locality in Ilam Province. We consider Dizgaran in Kermanshah to be the correct type locality .

Figures

Figure 1. Habitus of Oecobius dariusi sp. n. (A), O. naxuanus sp. n. (B), O. pasargadae sp. n. (C, D), O. navus (E, F), O. melanocephalus sp. n. (G, H) and O. zagros sp. n. (I), in dorsal (A–G, I) and ventral (H) views. A, D, F, G, H, females; B, C, E, I, males. G, H reproduced from Zamani et al. (2017). Scale bars = 0.5 mm.

Figure 7. Male palp of Oecobius zagros sp. n. (A) retrolateral; (B) ventral; (C), (D) prolateral, slightly different angles. Scale bar = 0.2 mm. Abbreviations: Co – ‘conductor̍, Em – embolus, Lo – loop of sperm duct, Ra – radical apophysis, Rx – radix, St – subterminal apophysis, Ta – terminal apophysis.

Figure 8. Scanning electron microscopy images of the male palp of Oecobius zagros sp. n. (A) retrolateral; (B) ventral; (C) anterior; (D) proventral. Scale bar = 0.1 mm. Abbreviations: Co – ‘conductor̍, Em – embolus, Ra – radical apophysis, St – subterminal apophysis, Ta – terminal apophysis.

Figure 9. Collection localities of the newly described/recorded species of Oecobius. Circles – O. dariusi sp. n.; stars – O.melanocephalus sp. n.; squares – O. navus; triangle – O.naxuanus sp. n.; hexagon – O. pasargadae sp. n.; inverted triangle – O. zagros sp. n. Yellow symbols indicate the type localities.