A new species of the genus Baeoura from Morocco, with a key to the West Palaearctic species (Diptera, Tipuloidea, Limoniidae)

Abstract The genus Baeoura is represented in Morocco by two species, Baeoura ebenina Starý, 1981, and Baeoura staryi sp. n. The new species is described and illustrated, and a key to the West Palaearctic species of Baeoura is presented.


Introduction
The genus Baeoura Alexander, 1924 belongs to the subfamily Chioneinae. It originally was erected by Alexander (1924) as a subgenus of Erioptera Meigen, 1803, with the type species Erioptera nigrolatera described by Alexander, 1920. It later was transferred to the genus Cryptolabis Osten-Sacken, 1859 (Starý 1981). The genus comprises small species with antennae of 15 articles, a long Rs, the male hypopygium with a single gonostylus, a reduced ovipositor, and eggs which are large and blackened with a smooth surface. The immature stages are aquatic (Mendl and Tjeder 1974).
Worldwide, 70 species of the genus Baeoura have been reported, including 43 in the Oriental Region, ten in the Afrotropical Region, four in Australia, four in the East Palaearctic, eight in the West Palaearctic, and a single species in Chile (Oosterbroek 2014). In North Africa, the genus was recorded by Krzeminski and Starý (1984) who described a new species, B. szadziewskii, from northeastern Algeria. Two species belonging to the genus Baeoura have been collected in northwestern Morocco: Baeoura ebenina Starý, 1981, a new record for North Africa, and Baeoura staryi sp. n. Thus, in Morocco, the genus Baeoura is represented by two species. Here, Baeoura staryi sp. n. is described and a key to the West Palaearctic species of Baeoura (mostly males) is provided.

Material and methods
The specimens were collected using an entomological hand net. Genital preparations were made by macerating the apical portion of the abdomen in cold 10% KOH for 12-15 h. After examination, the genitalia were transferred to fresh glycerin and stored in a microvial. The holotype (male in alcohol) is deposited in the collections of the laboratory at Ecology, Biodiversity and Environment, Faculty of Science, University Abdelmalek Essaâdi, Tétouan, Morocco. A paratype male (dry) is deposited in the collection of J. Starý, Olomouc, Czech Republic.
Terminology of morphological features generally follows that of McAlpine (1981).

Systematic
Key to West Palaearctic species of Baeoura (mostly males)

5.
Gonostylus narrowed just before tip, obtuse at apex; aedeagus dilated in proximal half, spindle-shaped in dorsal aspect, produced into long filament; for male and female terminalia, see Mendl and Tjeder (1974) (Oosterbroek 2014). We provide the first record for Morocco and North Africa.
Ecology. According to Starý (2014), this species is collected near rivers and brooks. In Morocco, we collected adults by sweeping the vegetation around lotic and lentic habitats. One habitat was in the middle of a temporary river with a substrate of stones, gravel, and sand. The wet section was reduced to a thin layer of water, due to the beginning of the dry season and to water being pumped out by countrymen; the current velocity was slow to medium. There was a proliferation of filamentous green algae. Riparian vegetation consisted primarily of Nerium oleander and herbaceous vegeta-tion. A second habitat was a pond surrounded by conifer reforestation, with the edges overgrown by grasses and herbaceous vegetation.
Head: Dark greyish brown; rostrum obscurely yellow; palpus yellowish brown, with terminal palpomere elongate. Antenna dark brown, with 15 articles, bent backwards, reaching to about anterior margin of thorax. Scape cylindrical; pedicel large, ovoid, much broader than scape. First flagellomere rather long-ovoid, smaller than scape but distinctly larger than other flagellomeres, these diminishing toward apex of antenna. Verticils on flagellomeres sparse and short, not reaching length of respective flagellomere.
Thorax: Pronotum brown dorsally, yellow laterally. Mesonotum dark brown with broad, pale yellow stripe on each side close above wing, from pronotum to scutellum. Scutum with distinct yellow marking near base of wing. Scutellum light yellow, light brown only medially on extreme anterior margin. Pleuron generally greyish brown, light yellow on dorsopleural membrane (part of lateral stripe).
Legs: Anterior coxa brown, middle coxa pale brown, hind coxa yellow. Trochanters yellowish brown. Femora yellowish brown, with darker distal half and blackish brown at distinctly enlarged apex. Tibiae yellowish brown. Tarsi dark brown. Tibiae longer than femora. Legs rather densely and darkly haired.
Wing (Fig. 1): Hyaline with faint yellowish-grey tinge; veins primarily brown. Sc ending just before fork of Rs. Halter rather stout, with white knob.
Abdomen: Dark brown dorsally and ventrally, paler laterally. Male terminalia (Figs 2-7): Yellowish brown. Tergite 9 narrow distally, its posterior margin with median emargination, and with short, truncate lobe on each side of it. Gonocoxite with two lobes; dorsal lobe rather short and broad; ventral lobe long and slender, gently curved dorsally. Single gonostylus of peculiar shape, long, slender, with bulge-shaped extension at about mid-length provided with group of setulae at outer surface, then tapered into slender distal half, strongly bent posteriorly, and almost filiform before pointed apex (Fig. 8). Aedeagus long, slender, curved dorsally (Fig. 9).