Synapion (Parasynapion) lyubechanskii Legalov, 2023

Legalov, Andrei A., 2023, A new species of the genus Synapion Schilsky, 1902 (Coleoptera, Brentidae) from Republic of Khakassia (Russia, Southern Siberia), Ecologica Montenegrina 65, pp. 60-66 : 61-64

Synapion (Parasynapion) lyubechanskii Legalov , sp. nov. ( Figs. 1-2 )

https://zoobank.org/ urn:lsid:zoobank.org:act:37BD8146-F197-4673-8EB0-12BEC2F6FADF

Type material: Holotype, male ( ISEA), RUSSIA, Republic of Khakassia, Shirinsky District, northern shore of Shira lake , 54°32'03.3"N, 90°11'58.2"E, 11-19.VI.2023, I.I. Lyubechanskii . Paratypes, 2 females ( ISEA), idem .

Description. Body black-brown, with weak metallic lustre, covered with sparse appressed scales. Base of antennomere 1 red. Male: Rostrum weakly curved, subcylindrical, densely punctate, apically subglabrous, 6.0 times as long as wide at apex, 4.8 times as long as wide in middle, 5.3 times as long as wide at base, about 1.1 times as long as pronotum. Mesorostrum slightly dilated. Antennal scrobes deep, long, directed to under rostrum. Forehead slightly convex, slightly wider than rostrum base width. Eyes large, rounded, protruding from contour of head, coarsely faceted. Temples short, 0.5 times as long as eyes. Antennae straight, inserted ventrally before middle of rostrum, rather long, reach pronotum. Funicle 7- segmented. Antennomere 1 elongate-trapezoidal, about 2.3 times as long as wide. Antennomere 2 elongateoval, about 1.3 times as long as wide in middle, 0.5 times as long as and 0.9 times as narrow as antennomere 1. Antennomeres 3-6 subconical. Antennomere 3 subequal in length and width, 0.7 times as long as and 0.9 times as narrow as antennomere 2. Antennomere 4 subequal in length and width, 0.9 times as long as and 0.9 times as narrow as antennomere 3. Antennomeres 4-6 subequal in width. Antennomere 5 about 0.8 times as long as wide at apex, about 0.8 times as long as antennomere 4. Antennomere 6 subequal to antennomere 5. Antennomeres 7 and 8 suboval. Antennomere 7 0.8 times as long as wide at apex, about 1.1 times as long as and about 1.1 times a wide as antennomere 6. Antennomere 8 about 0.8 times as long as wide at apex, about 1.1 times as long as and 1.2 times a wide as antennomere 7. Club compact, about 0.7 times as long as antennomeres 2-8 combined. Antennomere 9 about 1.8 times as long as wide at apex, about 3.6 times as long as and 1.5 times a wide as antennomere 8. Antennomere 10 about 0.3 times as long as wide in middle, about 0.3 times as long as and about 0.7 times a wide as antennomere 9. Antennomere 11 0.5 times as long as wide at apex, 0.5 times as long as and about 0.7 times a wide as antennomere 10. Pronotum subconical, 1.5 times as long as wide at apex, 1.2 times as long as wide in middle and about 1.2 times as long as wide at base. Greatest width near middle. Scutellum almost triangular, small. Elytra back pear-shaped, convex, about 2.7 times as long as base width, 1.6 times as long as wide in middle, about 3.3 times as long as wide in apical quarter, about 2.5 times as long as pronotum. Greatest width beyond middle. Humeri absent. Striae weak. Interstriae wide, 4.0-4.7 times as wide as striae, flat, slightly transverse-rugose, with row of punctation. Pre- and postcoxal portions of prosternum short. Precoxal portion 0.4 times as long as procoxae. Postcoxal portion about 0.8 times as long as precoxal portion. Pro- and mesocoxal cavities rounded. Procoxal cavities completely separated. Mesocoxal cavities separated. Metacoxal cavities transversely extended. Metaventrite about 1.8 times as long as metacoxa. Ventrites 1 and 2 subequal in length, convex, fused. Ventrite 1 about 2.2 times as long as metacoxal length. Ventrites 3–5 flat, positioned in different plane than ventrites 1 and 2. Ventrites 3 and 4 subequal in length. Ventrite 3 about 0.2 times as long as ventrite 2. Ventrite 5 convex, 2.4 times as long as ventrite 4. Legs long. Procoxae conical. Meso- and metacoxae convex. Trochanters elongate. Femora slightly clavate, separated from coxae, without teeth. Tibiae almost straight, rather thick. Tarsi long, with erect setae dorsally. Tarsomeres 1 and 2 elongate-conical. Tarsomere 1 slightly longer than tarsomere 2. Tarsomere 2 slightly wider than tarsomere 1. Tarsomere 3 conical. Tarsomere long-conical. Claws relatively large, free, without teeth. Total body length (without rostrum) 2.5 mm. Length of rostrum 0.7 mm. Female: Rostrum 5.6-6.4 times as long as wide at apex, 5.2-5.8 times as long as wide in middle, 4.5- 5.0 times as long as wide at base, 1.3-1.4 times as long as pronotum. Forehead slightly narrower than rostrum base width. Antennomere 1 about 2.5 times as long as wide. Antennomere 2 about 1.4 times as long as wide in middle, about 0.5 times as long as and about 0.9 times as narrow as antennomere 1. Antennomere 3 subequal about 1.1 times as long as wide at apex, about 0.8 times as long as and subequal in width to antennomere 2. Antennomere 4 subequal in length and width, slightly shorter and narrower than antennomere 3. Antennomere 5 about 0.9 times as long as wide at apex, about 0.9 times as long as and subequal in width to antennomere 4. Antennomere 6 about 0.7 times as long as wide at apex, about 0.8 times as long as and slightly wider than antennomere 5. Antennomere 7 about 0.6 times as long as wide at apex, subequal in length and slightly wider than antennomere 6. Antennomere 8 about 0.6 times as long as wide at apex, about 1.1 times as long as and about 1.2 times a wide as antennomere 7. Club about 0.7 times as long as antennomeres 2-8 combined. Antennomere 9 about 3.3 times as long as antennomere 8. Antennomere 10 about 0.5 times as long as antennomere 9. Antennomere 11 about 0.7 times as long as antennomere 10. Pronotum 1.4-1.5 times as long as wide at apex, about 1.1 times as long as wide in middle and about 1.2 times as long as wide at base. Elytra 2.4-2.6 times as long as base width, 1.5-1.6 times as long as wide in middle, 2.2-2.6 times as long as wide in apical quarter, 2.6-2.7 times as long as pronotum. Precoxal portion about 0.5 times as long as procoxae. Postcoxal portion about 0.9 times as long as precoxal portion. Metaventrite about 2.1 times as long as metacoxa. Ventrite 1 about 1.7 times as long as metacoxal length. Ventrite 2 slightly shorter than ventrite 1. Ventrite 3 about 0.3 times as long as ventrite 2. Ventrite 4 slightly longer than ventrite 3. Ventrite 5 flattened, about 2.9 2.4 times as long as ventrite 4.

Comparison. The new species is similar to Synapion (Parasynapion) alexandri from Republic of Tyva but differs in the narrower rostrum and pronotum, and the stronger narrowed apex of the aedeagus.

Etymology. Patronymic. In honour of I.I. Lyubechanskii ( Russia), who collected this species.

Remarks. This species was collected by pitfall traps on feather-grass steppe with clumps of Achnatherum and wormwood on an escarpment on solonezic soil ( Fig. 3 ), and coastal meadow near the water of the salt lake, under the escarpment ( Fig. 4 ).

Localisation. Southern Siberia: Khakassia: near Shira Lake ( Fig. 2 ).

Figures

Figure 1. Synapion lyubechanskii sp. nov., Khakassia: a – holotype, male, habitus, dorsal view; b – paratype, female, habitus; c – holotype, aedeagus, dorsal view; d – holotype, aedeagus, lateral view; e – holotype, apex of aedeagus, dorsal view; f – holotype, abdomen. Scale bar = 1.0 mm for a-b, 0.5 mm for c-f.

Figure 2. Distribution map of Synapion in Southern Siberia: red circle – S. lyubechanskii sp. n., black circle – S. alexandri.

Figure 3. Habitat (feather-grass steppe with Achnatherum clumps) of Synapion lyubechanskii sp. n.

Figure 4. Habitat (coastal meadow) of Synapion lyubechanskii sp. n.