Rhysodromus genoensis, Zamani & Marusik, 2021

Zamani, Alireza & Marusik, Yuri M., 2021, A new genus and ten new species of spiders (Arachnida, Araneae) from Iran, ZooKeys 1054, pp. 95-126 : 95

Rhysodromus genoensis sp. nov.

Figures 18A , 19A, B , 20A-F

Type material.

Holotype ♂ (NHMW), Iran: Hormozgan Province: Geno, 38 km NW of Bandar Abbas, 3.4.1972 (G. Pretzmann).

Etymology.

The specific epithet refers to the type locality of the new species in Geno Biosphere Reserve.

Diagnosis.

This species differs from all congeners by the lack of the RTA (vs present in all species) and bifurcated tip of tegular apophysis (vs not bifurcated).

Description.

Male. Habitus as in Figure 18A . Total length 3.80. Carapace 1.65 long, 1.60 wide. Eye sizes: AME: 0.11, ALE: 0.10, PME: 0.06, PLE: 0.10. Carapace, labium, chelicera and maxilla brown, without any pattern; pars cephalica and median part of pars thoracica lighter in color; sternum pale, with a grayish marginal band. Legs yellowish-brown, with numerous dark spots and small patches. Abdomen grayish, dorsally with distinct cardiac mark and darker margins and light spots and patches; ventrally with slightly darker median band. Spinnerets brown, unicolourous. Measurements of legs: I: 7.86 (2.27, 0.89, 1.95, 1.74, 1.01), II: 9.15 (2.66, 0.88, 2.31, 2.05, 1.25), III: 5.55 (1.72, 0.65, 1.29, 1.16, 0.73), IV: 7.06 (2.26, 0.74, 1.69, 1.61, 0.76).

Palp as in Figures 19A, B , 20A-F ; tibia as long as bulb’s width, lacking distinct apophysis; cymbium with long tip (partially extending tegulum), about 0.9 of tegulum’s length; tegulum oval, about 1.5 times longer than wide; sperm duct with small transverse loop in mesal part of tegulum; tegular apophysis long, located anteriorly along longitudinal axis, tip bifid; embolus long,>0.5 of tegulum’s length, straight, with tip gently bent retrolaterally.

Female. Unknown.

Comments.

The new species has a pattern typical for the genus and is particularly similar to R. alascensis (Keyserling, 1884) and R. histrio (Latreille, 1819).

There are two Rhysodromus species in the region (both from Caucasus) known from females only, R. rikhteri (Logunov & Huseynov, 2008) and R. naxcivanicus (Logunov & Huseynov, 2008), but it is very unlikely that either of them would be conspecific with R. genoensis sp. nov., as their type localities are located more than 1000 km distant from that of the new species.

Distribution.

Known only from the type locality in Hormozgan Province, southern Iran.

Figures

Figure 18. Male dorsal habitus of Rhysodromus genoensis sp. nov. (A) and Rhysodromus medes sp. nov. (B).

Figure 19. Male palps of Rhysodromus genoensis sp. nov. (A, B) and Rhysodromus medes sp. nov. (C, D) A, C ventral B, D retrolateral. Abbreviation: Ta - tegular apophysis. Scale bars: 0.2 mm.

Figure 20. SEM images of the male palp of Rhysodromus genoensis sp. nov. A, E retroventral B, F ventral C proventral D retrolateral. Abbreviation: Ta - tegular apophysis. Scale bars: 0.1 mm, unless stated otherwise.