Oecobius naxuanus, 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 : 1699-1701

Oecobius naxuanus sp. n.

( Figures 1B , 5A–C )

Type material

Holotype ♂ ( ZMMU), AZERBAIJAN: Nakhchivan Autonomous Republic : Dasharkh Vil., 39.55° N, 45.033333°E, 1‒4 June 2003 (Y.M. Marusik).

Etymology

The specific epithet refers to Naxuana, which is the name given to Nakhchivan in Ptolemy̍s Geography and in the works of other classical authors.

Diagnosis

In the habitus, the new species is similar to O. dariusi sp. n., but differs by having no annulations on the legs (compare Figure 1A and B ). In the general conformation of the male palp and particularly the shape of radical apophysis, it is similar to O. rhodiensis (compare Figure 5A, C and Demir et al. 2009, figs 11, 12, 14, 15), but can be distinguished by the gradually tapering and gently bent radical apophysis (Ra) (vs tip not tapering and bent; compare Figure 5C and Wunderlich 1995, fig. 49).

Description

Male. Habitus as in Figure 1B . Total length 2.17. Carapace 0.75 long, 0.88 wide. Eye sizes: AME: 0.08, ALE: 0.08, PLE: 0.06, PME: 0.09. Carapace yellowish brown, with darker radiating and marginal stripes. Chelicerae, sternum, labium, and maxillae pale brown. Legs coloured as carapace, without annulations. Abdomen greyish brown and mottled with small guanine patches, with dark brown patches. Spinnerets light greyish brown. Measurements of legs: I: 2.79 (0.82, 0.30, 0.61, 0.60, 0.46), II: 2.98 (0.86, 0.32, 0.68, 0.63, 0.49), III: 2.97 (0.82, 0.31, 0.66, 0.69, 0.49), IV: 3.28 (0.95, 0.32, 0.70, 0.81, 0.50).

Palp as in Figure 5A–C ; bulb oval in ventral view, 1.4 times longer than wide; sperm duct (Sd) not forming loops; terminal apophysis (Ta) broad in lateral view, with 2 lobes; subterminal apophysis (St) hook-like, bent anteriorly; radix (Rx) with long, roundly bent apophysis (Ra) and kind of heel (Rh); ‘conductor̍ (Co) small, membranous; embolus (Em) short and thick.

Female. Unknown.

Distribution

Known only from the type locality in Nakhchivan Autonomous Republic , Western Azerbaijan ( Figure 9 ) .

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 5. Male palp of Oecobius naxuanus sp. n. (A) retrolateral; (B) ventral; (C) prolateral. Scale bar = 0.2 mm. Abbreviations: Co – ‘conductor̍, Em – embolus, Ra – radical apophysis, Rh – heel of radix, Rx – radix, Sd – sperm duct, 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.