Baeoura neretvaensis Kolcsar & d'Oliveira, 2023

Kolcsar, Levente-Peter, d'Oliveira, Micha Camiel, Graf, Wolfram, Quindroit, Clovis, Watanabe, Kozo & Ivkovic, Marija, 2023, New records for the Western Balkans cranefly fauna (Diptera, Tipuloidea) with the description of a new Baeoura Alexander (Diptera, Limoniidae), ZooKeys 1157, pp. 1-42 : 1

publication ID	https://dx.doi.org/10.3897/zookeys.1157.98997
publication LSID	lsid:zoobank.org:pub:1685D647-9DDD-45FE-B0AC-70AE8CF295AA
persistent identifier	https://treatment.plazi.org/id/F5064F12-97F3-4B8D-AABF-7B02DE749710
taxon LSID	lsid:zoobank.org:act:F5064F12-97F3-4B8D-AABF-7B02DE749710
treatment provided by	ZooKeys by Pensoft
scientific name	Baeoura neretvaensis Kolcsar & d'Oliveira
status	sp. nov.

Treatment

Baeoura neretvaensis Kolcsar & d'Oliveira sp. nov.

Figs 1 View Figure 1 , 2 View Figure 2 , 3 View Figure 3 , 4 View Figure 4 , 5 View Figure 5

Type material.

Holotype. Bosnia and Herzegovina • male; Ulog, Neretva River at Ulog Camp site; alt. 650 m; 43.41714°N, 18.31205°E; 28 Jun. 2022; W. Graf leg.; HOLOTYPE Baeoura neretvaensis Kolcsár & d’Oliveira, sp. nov. [red label]; SMOC.

Paratypes. Bosnia and Herzegovina • 3 females; Ulog, Neretva at Ulog Camp site; 43.41714°N, 18.31205°E; alt. 650 m; 28 June 2022; leg. W. Graf; SMOC • 2 males, 2 females; Krupac, Krupac Confluence to Neretva River; 43.32942°N, 18.42574°E; alt. 775 m; 29 June 2022; leg. M. Ivković; 1 male in UZC, 1 male and 2 females in SMOC • 1 female; Cerova, Cerova on Neretva; 43.37887°N, 18.35621°E; alt. 695 m; 30 June 2022; leg. M. Ivković; SMOC • 6 males, 13 females; Ulog, Ulog on Neretva River; 43.42414°N, 18.30837°E; alt. 640 m; 29 June 2022; leg. W. Graf; 1 male and 1 female in PCJS; 4 males and 11 females in SMOC, 1 male and 1 female in CKLP. Montenegro • 1 female; Berane, on window in town; 42.8436°N, 19.8666°E; alt. 685 m; 07 July 2012; leg. M. Ivković; UZC. Slovenia • 2 females; Gorenjska, Juliske alpe, Gozd Martuljek, River Sava; in small woodland on the banks of river Sava; 46.483°N, 13.838°E; alt. 740 m; 20 August 2019; leg. M.C. d’Oliveira; PCMCO.

Diagnosis.

General coloration dark brown, with lateral parts of thorax striped. Scutellum posterior margin whitish. Wing without any markings, hyaline. Gonocoxite long and narrow, without prominent dorsal lobe. Gonostylus very long, narrow, and strongly curved, with a long seta at tip and a flat, blade-like lobe at base. Aedeagal sheath large, strongly curved dorsally, laterally flattened, with a forked process at 3/5 of its length from the base. Female terminalia with a pair of finger-like lobes on sternite 8, longer than cercus or hypogynial valve. Genital chamber complex and strongly sclerotized, sternite 9 with a pair of triangular lobes on the posterior edge, and a pair of finger-like anterior invaginations.

Description.

Male. Body length 5.5-6.5 mm, wing length 4.5-5.5 mm. General color dark brown, with lighter abdomen (Fig. 1A View Figure 1 ).

Head. Wider than long. Eyes small and dorsally widely separated, ~ 1/2 as wide as narrowest point between eyes (Fig. 1B View Figure 1 ); eyes also separated from each other ventrally too, ~ 1/2 of width of eye. Eyes small, separated dorsally and ventrally (Fig. 1B View Figure 1 ). Dorsal separation ~ 1/2 as wide as narrowest point between eyes (Fig. 1B View Figure 1 ), ventral separation ~ 1/2 of wide of eye. Vertex dark brown. Rostrum short, pale brown to brown. Palpus 5-segmented, uniformly brown, or slightly paler at apex; palpomeres 2-5 similar in size. Antenna ~ 2-2.5 × longer than head, reaching beyond prescutum if bent backward (Fig. 1B, C View Figure 1 ). Scape brown, cylindrical 2-2.5 × longer than wide; pedicel dark brown, shorter than scape, slightly enlarged, drop-shaped, 2 × wider than first flagellomere. Flagellum 13-segmented, brown, first flagellomere drop-shaped, subsequent flagellomeres gradually decreasing in wide and increasing in length toward apical segment, last flagellomere cylindrical. Basal flagellomeres with 2-4 longest verticils on dorsal and lateral sides, start from flagellomere 5 with five or six verticils; length of verticils subequal to length of corresponding flagellomeres.

Thorax. Dark brown dorsally (Fig. 1B View Figure 1 ), lateral parts stripped (Fig. 1C View Figure 1 ), formed by lighter and darker parts. Cervical sclerite black, roughly angular with a long extension connecting to head. Pronotum flat, anterior part brown posterior part pale brown. Prescutum and anterior part of scutum dark brown with four broad, darker, less distinct, longitudinal stripes (probably more visible on dry specimens). Central two stripes are fused anteriorly on prescutum, stripes cease near transverse suture. Outer stripes start on sides of posterior scutum, ceasing directly at transverse suture. Posterior part of scutum brown, with two longitudinal darker patches, lateral corner of scutal lobe distinctly yellowish brown. Scutellum brown anteriorly, posterior margin conspicuously white. Mediotergite dark brown. Proepisternum yellowish, pleuron, and posterior basalare white to yellowish white. Coxa 1, anepisternum, and anepimeron dark brown. Trochanters 1, 2, katepisternum, and meron brown. Coxae 2, 3, trochanter 3, and metaepisternum light brown. Femora brown, slightly darkening towards apex; tibiae and tarsi brown. Wing yellowish tinged, 3-3.2 × as long as wide (Fig. 1D View Figure 1 ). Stigma inconspicuous, whitish subhyaline with backlight. Vein Sc ending between level of forks of Rs and R2+3+4; crossvein sc-r situated on level of 4/5 of Sc (measured from crossvein h); R2+3+4 short, ~ 1/5-1/4 length of R4; R2+3 ~ as long as R2, almost perpendicular; M1+2 slightly longer than R5; crossvein r-m, 2-4 × longer than basal section of M1+2; cell dm opened, by atrophy of crossvein m-m; M4 ~ 1/4-1/3 × longer than M3+4; cross vein m-cu ca. middle of M3+4, relatively long; wing margin between tips of M1+2 and M3 similar in length as between M3 and M4, and between M4 and CuA, and ca. 1/2 in length than distance between CuP and A, CuP and A almost straight. Halter whitish, ~ 0.5 mm (Fig. 1B View Figure 1 ).

Abdomen. Tergites and sternites uniformly pale brown; terminalia slightly darker (Fig. 1A View Figure 1 ).

Male terminalia (Fig. 2 View Figure 2 ). Relatively large and prominent. Tergite 8 very narrow, posterior margin fits over anterior part of tergite 9 (Fig. 2C View Figure 2 ). Tergite 9 narrow, anterior part weakly sclerotized; posterior part with pair of round lobes, bearing long setae (Fig. 2A View Figure 2 ). Sternite 9 present as narrow band. Gonocoxite long, ~ 3 × longer than wide at middle with short ventral lobe (Fig. 2B, C View Figure 2 ). Gonostylus narrow and very long, directed dorsally (Fig. 2C View Figure 2 ) and strongly curved (Fig. 2A, B View Figure 2 ); basally with a flat plate, whose margin round from posterior view (Fig. 2D View Figure 2 ); tip of gonostylus slightly widened, with a perpendicular, very long, subhyaline gonostylar seta (Fig. 2A View Figure 2 ). Aedeagal complex long, as long as gonocoxite (Fig. 2 A, B, C View Figure 2 ). Interbase flattened, blade-like, widely fused with mesal surface of gonocoxite (inseparable from gonocoxite without breaking it), ~ 1/3 length of gonocoxite (Fig. 2A View Figure 2 ); tip convex or slightly concave in lateral view (Fig. 2E View Figure 2 ); both interbases medially fused. Aedeagal sheath strongly curved dorsally, narrowest near base, gradually broadening distally, widest at 3/5 of its length, produced into a very long filament-like aedeagus and a dorsal forked extension (Fig. 2E View Figure 2 ). Ejaculatory apodeme short, rod-shaped, directed ventrally. Parameres short, slightly curved dorsally in later view (Fig. 2E View Figure 2 ) and directed laterally in ventral view.

Female. Body length 6.0-6.4 mm, wing length 7.4-8.1 mm. Generally resembling male, coloration sometimes somewhat paler.

Female terminalia (Fig. 3 View Figure 3 ). Short and strongly modified. Tergite 9 ~ 2/3 of length and width of tergite 8 (Fig. 3A, C View Figure 3 ). Posterior margin of tergite 9 slightly concave. Tergite 10 and short, fleshy cerci fused, fused section sub-equal in length to tergite 9. Cerci appearing as two rounded lobes, with numerous setae at apex cerci widely separated with V-shape notch (Fig. 3A View Figure 3 ). Sternite 8 large, longer than tergites 8 and 9 together (Fig. 3C View Figure 3 ). Ventral margin of sternite 8 convex, posterolateral corner produced into finger-like process, covered with setae, and slanted upwards at ~ 45°, reaching further than cerci and hypogynial valves (Fig. 3C, D View Figure 3 ). Hypogynial valves short, subequal in length with tergite 10+cerci (Fig. 3A, C View Figure 3 ). Parts of genital chamber as genital fork, sternite 9 and genital opening fused and forming a complex strongly sclerotized structure (Fig. 3D View Figure 3 ). Area of genital opening pale, membranous, surrounded by more sclerotized sternite 9. Sternite 9 with numerous short setae. Posterior part of sternite 9 with a roughly triangular lobe between hypogynial valve and finger-like lobe of sternite 8, subequal in length to hypogynial valve. Anterior part of sternite 9 with a pair of invaginations lateral to genital fork, most probably holding the male gonostylus during the copulation. Genital fork narrowing to a point anteriorly, posteriorly fused with sternite 9 (Fig. 3D View Figure 3 ). Sternite 10 small, rounded.

Egg. Dark, large, sub-equal in length of tergite 9, tergite 10 and cerci combined; shape oval, cross section roughly triangular.

Etymology.

The name of this small and unique species refers to the Neretva River (Fig. 4 View Figure 4 ), one of the last pristine European rivers, from where it was collected in high numbers.

Distribution.

The new species is known from Bosnia and Herzegovina, Montenegro, and Slovenia (Fig. 5 View Figure 5 ).

Remarks.

Baeoura neretvaensis sp. nov. is unique among the Western Palaearctic species. The closest related species is Baeoura malickyi Mendl & Tjeder, 1976, but B. neretvaensis can be differentiated from it by the long and slender gonostylus which terminates in a long seta (gonostylus more robust and flattened in B. malickyi , with only a short spine-like seta at tip), gonocoxite with a short, apical ventral lobe (long finger-like lobe in B. malickyi ), a flat lobe at the base of the gonostylus present (no such lobe in B. malickyi ) ( Mendl and Tjeder 1976: figs 1-4). The female of the new species also differs from all described females by the presence of a pair of long finger-like lobes on sternite 8, which is longer than the hypogynial valve (a much shorter lobe is also present in female of B. malickyi ; however, it is 1/2 as long as the hypogynial valve ( Mendl and Tjeder 1976: figs 5-9).