Contribution to the knowledge of genus Nalassus Mulsant, 1856 (Coleoptera Tenebrionidae) from the Eastern Caucasus, Russia Author Nabozhenko, Maxim V. Precaspian Institute of Biological Resources of the Daghestan Federal Research Centre of the Russian Academy of Sciences, M. Gadzhiev str., 45, Makhachkala, Republic of Dagestan 367000, Russia. & Dagestan State University, M. Gadzhiev str., 43 a, Makhachkala, Republic of Dagestan 367000, Russia. & State Natural Reserve “ Erzi ”, Pobedy str., 3, Nazran, Republic of Ingushetia 386101, Russia. Author Gadaborsheva, Mariam A. Ingush State University, I. B. Zyazikova av., 7, Magas, Republic of Ingushetia 386001, Russia. & State Natural Reserve “ Erzi ”, Pobedy str., 3, Nazran, Republic of Ingushetia 386101, Russia. text Zootaxa 2023 2023-11-02 5361 3 419 426 https://www.mapress.com/zt/article/download/zootaxa.5361.3.7/52199 journal article 278347 10.11646/zootaxa.5361.3.7 5d405d8d-d14e-43fb-ad60-a0be08f3d623 1175-5326 10152224 9F25BE1A-01F6-4613-B2A0-C3E7929F36BD

TABLE 1. Differences between Nalassus magomedrasuli sp. n. and N. kalashiani.

N. magomedrasuli sp. n.	N. kalashiani
Morphological structures
Eyes less convex. Ratio of distance at widest part of head to distance between eyes 1.36–1.37 (Figs 2A, B)	Eyes more convex. Ratio of distance at widest part of head to distance between eyes 1.43 (Figs 2D, E)
Sexual dimorphism in the structure of apical maxillary palpomere (much wider in male) (Figs 2A, B)	No sexual dimorphism in the structure of apical maxillary palpomere (wide in male and female) (Figs 1D, E)
Male antennomeres 2–7 less thickened (Fig. 1F)	Male antennomeres 2–7 more thickened (Fig. 1G)
Pronotum widest slightly behind middle	Pronotum widest at basal third
Disc of pronotum slightly narrowly flattened along lateral margins (Figs 2A, B)	Disc of pronotum evenly convex (Figs 2D, E)
Male pro- and mesotarsi slightly widened, with comparatively short yellowish hairs on lateral margins and ventral side (Figs 3C, D)	Male pro- and mesotarsi little wider, with very dense and long pubescence on lateral margins and ventral side (Figs 3G, H)
Male tibiae much thinner (Fig 1A)	Male tibiae wider, robust (Fig. 1D)
Scutellar shield with several very sparse punctures or without puncturation (Figs 2A, B)	Scutellar shield densely and finely punctured (Figs 2D, E)
Male elytral interstriae finely and sparsely punctured (Fig. 2C)	Male elytral interstriae with slightly coarser and denser puncturation (Fig. 2F)
Male abdomen only with one hair brush on ventrite 1 (Fig. 3A)	Male abdomen with two hair brushes: larger on ventrite 1 and smaller on ventrite 2 (Fig. 3B)
First abdominal ventrite with much coarser puncturation than on other surface; metacoxal process of abdominal ventrite 1 with much sparser puncturation in apical part (Fig. 3E)	First abdominal ventrite with the same puncture size as on other surface and together with metacoxal process much denser and finer (in in comparative species) punctured (Fig. 3F)
Habitats
Limestone montaine steppes with phryganoid vegetation (1100–1500 m) (Fig. 4E)	Alpine meadows et least in Ingushetia (2100–2200 m) (Fig. 4F)