Marjanus isfahanicus, Zamani & Chatzaki & Esyunin & Marusik, 2021

Zamani, Alireza, Chatzaki, Maria, Esyunin, Sergei L. & Marusik, Yuri M., 2021, One new genus and nineteen new species of ground spiders (Araneae: Gnaphosidae) from Iran, with other taxonomic considerations, European Journal of Taxonomy 751 (1), pp. 68-114 : 92-94

Marjanus isfahanicus sp. nov.

urn:lsid:zoobank.org:act:9CB7FC88-C04C-4670-A98D-7A3ACC436976

Fig. 16

Diagnosis

The new species differs from the generotype by having interrupted anterior margins (vs uninterrupted), a strongly rebordered W-shaped atrium (vs inconspicuous) and round receptacles (vs tubular).

Etymology

The specific epithet is an adjective and refers to Isfahan Province, Iran, the type locality of the new species.

Type material

Holotype IRAN • ♀; Isfahan Province, Qamsar & Barzok Protected Area, 55 km SW of Qamsar, 14 km NE of Kamoo, near the road of Gargash observatory; 33°37′ N, 51°19′ E; 2710 m a.s.l.; 19 May 2016; P. Ponel leg.; MHNG.

Description

Female

Habitus as in Fig. 16A . Total length 3.04. Carapace 1.40 long, 1.01 wide. Eye sizes and interdistance of PMEs: AME = 0.05, ALE = 0.07, PME = 0.06, PLE = 0.06, PME–PME = 0.05. Carapace and chelicerae dark brown; carapace darker at the margins, with a pattern of light patches. Chelicera with 3 promarginal teeth and 1 retromarginal tooth. Sternum, maxillae and labium light brown. Legs lighter than carapace, without annulations, tarsi lighter. Abdomen dark dorsally, light brown ventrally, without any markings. Spinnerets light gray and uniform in color. Measurements of legs: I: 3.27 (0.95, 0.63, 0.69, 0.54, 0.46), II: 3.14 (0.91, 0.52, 0.69, 0.52, 0.50), III: 2.59 (0.74, 0.37, 0.51, 0.47, 0.50), IV: 3.98 (1.08, 0.56, 0.83, 0.92, 0.59).

Epigyne as in Fig. 16B–G . Atrium with distinct and separate anterior hoods; lateral margins distinct, converging; endogyne with membranous bursae near copulatory openings; copulatory ducts thin, forming 2 screw-like, full lateral coils in mid part, straight posteriorly, with blind glandular heads, connected

to ventral additional bursae with extra glandular tubes; receptacles globular, 3 times as wide as ducts, touching each other, with fertilization ducts located at their upper part.

Male

Unknown.

Comments

Based on the similarity of the epigynal conformation to that of the type species, we tentatively place this species here in the absence of male specimens. However, only two of the three diagnostic elements of the females of this genus are met in this new species: the long, coiled copulatory ducts and additional anterior copulatory bursae and the receptacles being round rather than tubular. The latter character may have to be omitted from the generic diagnosis when more species are described and included in this genus.

Distribution

Known only from the type locality in Isfahan Province, central Iran. This is the first record of Marjanus in Iran, and the second species described in this genus.

Figures

Fig. 16. Marjanus isfahanicus sp. nov., holotype, ♀ (MHNG). A. Habitus, dorsal view. B, D, F. Epigyne, ventral view. C, E, G. Epigyne, dorsal view. Scale bars: A = 0.5 mm; B = 0.2 mm; F–G = 0.1 mm.