Monochamus impluviatus impluviatus ( Motschulsky, 1859 )

Wallin, Henrik, Schroeder, Martin & Kvamme, Torstein, 2013, A review of the European species of Monochamus Dejean, 1821 (Coleoptera, Cerambycidae) - with a description of the genitalia characters, Norwegian Journal of Entomology 60, pp. 11-38 : 27

publication ID	https://doi.org/10.5281/zenodo.16005904
persistent identifier	https://treatment.plazi.org/id/9E6887F3-7343-FFDF-FFAD-24C4FD54FA99
treatment provided by	Felipe
scientific name	Monochamus impluviatus impluviatus ( Motschulsky, 1859 )
status

Treatment

Monochamus impluviatus impluviatus ( Motschulsky, 1859) View in CoL .

Monohammus impluviatus Motschulsky, 1859: 571 View in CoL Figures 5 View FIGURES 1–11 , 16 View FIGURES 12–23 , 32 View FIGURES 26–32 , 33E View FIGURES 33–35 , 35, 44 View FIGURES 36–44 , 50 View FIGURES 45–50 , 61, 62 View FIGURES 51–62 , 77, 78 View FIGURES 73–78 , 87. View FIGURES 79–87

A small species with short and broad elytra ( Figures 5 View FIGURES 1–11 , 16 View FIGURES 12–23 ). Elytra with dense and smooth granulation concentrated at the basal part of elytra only. Apical third of elytra dull (distinct micro-reticulation). Elytra covered with numerous small, yellowish and whitish irregular spots ( Figures 5 View FIGURES 1–11 , 16 View FIGURES 12–23 ). Pronotum with short, transversal ridges forming an irregular square-formed pattern. The lateral spines on pronotum short and blunt. Head (front view) broad and square-formed. Scutellum with a narrow and glabrous, transversal median line (visible in well preserved specimens). Antennae short: longer than body with three to four antennomeres in males, and with about one antennomere in females. Type locality: Russia (Siberia) .

Examined male: length 15.5mm, width 5.0mm; female: length 15.0mm, width 5.0mm.

Male terminalia. Aedeagus: 2.1mm long, relatively broad, weakly curved towards apex, dorsal ridge as wide as ventral ridge, dorsal and ventral ridges rounded at apex with dorsal ridge shorter than ventral ridge at apex ( Figures 61, 62 View FIGURES 51–62 ). Endophallus: approx. 6.0mm long and evenly broad from median to apical phallomer ( Figure 33E View FIGURES 33–35 ). Median part of endophallus with a micro-reticulated patch on the phallomer membrane ( Figure 33E View FIGURES 33–35 ). The two yellow crescent-shaped sclerites at the proximal end of the basal segment relatively fine (broader than those of M. saltuarius ), slightly flattened, twisted and partly folded ( Figure 50 View FIGURES 45–50 ). Internal sac (apical part of median phallomer): there is a relatively solid (but not sclerotized) tube, or terminal segment, embedded inside the internal sac ( Figures 33E View FIGURES 33–35 , 44 View FIGURES 36–44 ). The very small sclerotized structure is found inside the apical part of the terminal segment. Sclerite inside internal sac and terminal segment ( Figure 35 View FIGURES 33–35 ) “T”-shaped and approx. 0.3mm long. Internal sac with surrounding intersegmental membrane with very fine micro-reticulation. Tegmen: 2.4mm long, base of tegmen, at lower part of median lobe, extended and strongly curved

dorso-ventrally on middle. Parameres: relatively short and stout, flattened dorso-ventrally, weakly separated medially along inner margin and connecting towards apex ( Figures 77, 78 View FIGURES 73–78 ). Base of inner margin has an extension from each paramere projecting forward forming a “tooth” ( Figure 77 View FIGURES 73–78 ). Apex evenly rounded along posterior margin with scattered fringes of short, brownish hairs well concentrated at edge of apex ( Figure 77 View FIGURES 73–78 ). Parameres dorsally shining (i.e. no micro-reticulation). Distinct punctures and transversal ristae on ventral side of parameres ( Figure 78 View FIGURES 73–78 ). Tergite VIII: 1.2mm long, with brownish pigmentation, posterior margin slightly elongated and narrowly rounded, and covered with short, very fine brownish hairs distally towards the flattened posterior margin ( Figure 87 View FIGURES 79–87 ). Surface with weak micro-reticulation medially.

Female terminalia. Tignum: almost straight, 8.9mm long (width: approx. 0.3mm at the widest point apically: Figure 32 View FIGURES 26–32 ). Tergite VIII: posterior margin (width: approx. 2.0mm) with sparse and relatively long fringes of dark brown hairs laterally ( Figure 32 View FIGURES 26–32 ), surface dorso-laterally with numerous small granulae, and sparsely covered with fine yellowish hairs and a few brownish setae, and dorso-medially mostly with weak micro-reticulation (with a more or less shining area medially), and a weak longitudinal impression. The colour is brown. Spermathecal capsule: Weakly sclerotized, yellowish, relatively long, widened at base, and curved almost 180° towards apex ( Figure 32 View FIGURES 26–32 ). Apex with an elongated head, 1.0mm long.

Remarks. Reaches the European part of Ural in the west ( Sama 2002). This species has, so far, not been recorded from Western Europe, although it may eventually be imported with timber from Russia.