Xysticus mongolicus Schenkel, 1963

Gallé-Szpisjak, Nikolett, Gallé, Róbert, Szabó, Krisztián & Szűts, Tamás, 2024, On the identity and placement of Xysticus lendli Kulczyński, 1897 (Araneae, Thomisidae): an integrative approach, Zoosystematics and Evolution 100 (3), pp. 1017-1028 : 1017-1028

Xysticus mongolicus Schenkel, 1963 comb. rev.

Figs 3 D – F , 4 D – F , 5 C, D

Xysticus mongolicus Schenkel, 1963: Schenkel 1963: 227, fig. 127 a ‒ c (♂).

X. mongolicus Song, Yu & Yang, 1982: 210 (♂ ♀); Song 1987: 284, fig. 241 a ‒ d (♂ ♀); Song and Zhu 1997: 95, fig. 62 a ‒ d (♂ ♀); Utochkin 1995: 67, fig. 1 a ‒ g (♂ ♀); Zhao 1993: 388, fig. 193 a ‒ b (♂ ♀); Marusik and Logunov 1990: 47, figs 48‒49 (♂); Fomichev 2015: 97, figs 13‒15 (♂).

Note.

Because Purgat et al. 2021 (fig. 6) based their proposal of the new combination on a misidentified S. lendli specimen, we reinstate its original combination.

Material examinded.

Russia • 1 male ( ISEA, 001.7306 ), Russia, Altai Republic, 6 km SE of Chagan-Uzun Vill. , 26. 07. 2021. 50.066667 ° N, 88.433333 ° E, 1900 m asl., stony semi-desert steppe, leg. & det. A. A. Fomichev.: Altai Republic ,

Diagnosis.

The male can be identified by the spiral-shaped and bare embolus with fine tip. X. mongolicus has no tegular ridge.

Description.

See Fomichev, 2015.

Distribution.

Nentwig et al. (2024) report this species from Europe to Central Asia. So far, all Central European records have turned out to be S. lendli . We could not examine the specimens used for the Ukrainian records by Polchaninova N., Prokopenko E. (2019), or the Russian records ( Ponomarev 2022).

Both ML and BI phylogenetic trees (Fig. 9 , Suppl. material 1, respectively) place Spiracme lendli grouping with the type species of the genus, S. striatipes . In that group, S. triangulosus is a sister. We were unable to recover a monophyletic Spiracme , as S. durus and S. nigromaculatus grouped together but not with the type species. Given the limited use of a single mitochondrial gene in systematics and the low support values on the tree, we would not draw further conclusions regarding the genus limits.

Figures

Figure 3. Male palps: A – C. Spiracme lendli; D – F. Xysticus mongolicus; G – I. S. striatipes; A, D, G. Prolateral view; B, E, H. Ventral view; C, F, I. Retrolateral view. Scale bar: 0.2 mm. Abbreviations: tb — tegular bump; tut — tutaculum.

Figure 4. Distinguishing characters of Spiracme lendli (A ‒ C) and Xysticus mongolicus: (D ‒ F); D. Prolateral view; B, E. Ventral view; C, F. Retrolateral view. Scale bar: 0.2 mm.

Figure 5. Comparison of male emboluses: Spiracme lendli (A, B) and Xysticus mongolicus (C, D). Scale bars: 0.2 mm.

Figure 9. Maximum likehood tree based on the DNA barcode data (658 nt of the mitochondrial COX 1 gene), inferred with IQ-TREE.