Dyscritulus europaeus Kocic & Tomanovic, 2023

Kocic, Korana, Petrovic, Andjeljko, Ckrkic, Jelisaveta, van Achterberg, Cornelis & Tomanovic, Zeljko, 2023, Dyscritulus europaeus sp. nov. (Hymenoptera, Braconidae, Aphidiinae): description of a new aphid parasitoid species with an identification key for species of the genus, ZooKeys 1175, pp. 285-297 : 285

publication ID	https://dx.doi.org/10.3897/zookeys.1175.106416
publication LSID	lsid:zoobank.org:pub:417DA50B-F0EA-4781-99C2-5FA0F7A9C80A
persistent identifier	https://treatment.plazi.org/id/2F9F79F5-3F7B-45A1-8EA3-8FACA4D0FE98
taxon LSID	lsid:zoobank.org:act:2F9F79F5-3F7B-45A1-8EA3-8FACA4D0FE98
treatment provided by	ZooKeys by Pensoft
scientific name	Dyscritulus europaeus Kocic & Tomanovic
status	sp. nov.

Treatment

Dyscritulus europaeus Kocic & Tomanovic sp. nov.

Figs 1A-H View Figure 1 , 2A-H View Figure 2 , 3 View Figure 3

Material.

Holotype: 1♀, Spain, Málaga, Ronda, Sra Nieves, 1500 m alt., 4 June 1999, M. J. Gijswijt leg., found on Acer sp., collected by sweep net . Paratypes: 1♀, same data as for holoype ; 1♀, France, Mt. Ventoux, Plan de Perrache , 4 July 1995, M. J. Gijswijt leg., collected by sweep net ; 3♀ 4♂, Serbia, Belgrade, New Belgrade, 5 June 2006, reared from mummies found on A. pseudoplatanus ; 1♀, Serbia, Kruševac, Slobodište, 5 July 2013, reared from D. platanoidis on A. pseudoplatanus ; 1♀ 4♂, Serbia, Belgrade, Pionirski Park , 28 May 2007, reared from mummies found on A. pseudoplatanus . Deposition : Holotype and two paratypes (from Spain and France) deposited in Naturalis Biodiversity Center, Leiden , Netherlands . Paratypes from Serbia deposited in collection of Institute of Zoology , University of Belgrade - Faculty of Biology, Belgrade, Serbia .

Diagnosis.

Dyscritulus europaeus sp. nov. can easily be distinguished from most commonly found species D. planiceps by having 21 antennomeres (Fig. 1B View Figure 1 ) (in one female specimen apical antennomera is half-divided, giving the impression of 22 antennomeres) (while D. planiceps has 23-24), coloration of first (F1) and second (F2) flagellomere (Fig. 1C View Figure 1 ) (F1 and first half of F2 yellow, while in D. planiceps F1, F2 and first half of F3 are yellow), shorter R1 vein (Fig. 1H View Figure 1 ) (pterostigma/R1 length ratio is 2.0-2.2 vs 1.5-1.6 in D. planiceps ), more elongated petiole (Fig. 1F View Figure 1 ) (ratio of petiole length and width at spiracles level is 1.7 vs 1.5 in D. planiceps ) and narrower ovipositor sheath (Fig. 1G View Figure 1 ). From D. pygmaeus and D. dzhungaricus it is differentiated by number of antennomeres (21 vs 15 in both D. pygmaeus and D. dzhungaricus ) and presence of areola on propodeum. It is most similar to D. trjapitzini , however it differs in following morphological characters: number of antennomeres (21 vs 22 in D. trjapitzini ), more elongated petiole (ratio of petiole length and width at spiracles level is 1.7 vs 1.5 in D. trjapitzini ), color of F1 and F2 (F1 and half of F2 yellow vs F1 and F2 entirely yellow with darker apices in D. trjapitzini ) and shorter F1 (4.5-4.6 length to width ratio vs 5 in D. trjapitzini ).

Description.

Female. Head. (Fig. 1A View Figure 1 ) Head sparsely setose, wider than mesosoma at tegulae (head/mesoscutum width ratio 1.35-1.45). Eyes oval, relatively small. Clypeus sparsely setose. Tentorial index (tentoriocular line/intertentorial line) 0.25-0.32. Malar space equal to 0.18-0.22 of longitudinal eye diameter. Maxillary palps with 4 very long palpomeres, labial palps with 3 palpomeres. Antennae filiform, with 21 antennomeres (Fig. 1B View Figure 1 ), one female with half-divided apical antennomera. Flagellomeres cylindrical, with semi-erect setae subequal to flagellomere diameter. First (F1) and second (F2) flagellelomere 4.5-4.6 and 3.7-3.95 times as long as wide, respectively (Fig. 1C View Figure 1 ). F1 1.15-1.28 times longer than F2. Both F1 and F2 without longitudinal placodes.

Mesosoma. Mesoscutum with wide, deep notaulices, almost reaching prescutellar groove, dividing mesoscutum into three lobes (Fig. 1D View Figure 1 ). In lighter-colored specimens notaulices are paler and give an impression of reaching only half of mesoscutum. Two longitudinal rows of setae are present along the sides of notaulices. Lateral lobes of mesoscutum are covered with short dense setae at the proximity of prescutellar groove, which is deep and smooth. Scutellum with somewhat longer setae along the outer margins. Propodeum areolated, with distinct central areola, in some specimens with slightly irregular lateral carinae (Fig. 1E View Figure 1 ). In smaller specimens, central areola is somewhat wider. External areolae with 4-5 short setae on each side, dentiparal areolae smooth or with one long seta. Fore wing with marginal setae that are longer than the surface setae (Fig. 1H View Figure 1 ). Pterostigma triangular, 3.1-3.5 times as long as wide. Vein R1 (=metacarpus) shorter than pterostigma (pterostigma length/R1 vein ratio 2.0-2.2). Vein r&RS distinctly colored in the proximal part, subequal to R1 vein length (1.0-1.15); the rest of the r&RS is colorless, reaching almost to the outer margin of the wing. Veins m-cu and 2M are colored throughout.

Metasoma. Petiole convex, 1.7 times as long as wide at spiracle level, with distinctly prominent transversal and longitudinal carinae (Fig. 1F View Figure 1 ). One central short longitudinal carina is feebly visible. On dorso-lateral sides two prominent longitudinal carinae are visible. Spiracular tubercles located closer to the anterior part of the petiole. Along the sides of the petiole, 4-5 long setae are present. Ovipositor sheaths elongated (2.2-2.4 length/width ratio), narrowed towards the apices, with 4-5 short setae across dorsal and ventral sides (Fig. 1G View Figure 1 ). Several campaniform sensillae situated at apical portion of ovipositor sheaths.

Colour. Upper part of head is brown, lower part, clypeus and mouthparts yellow (except for darker apices of mandibles). Scape, pedicel and annellus are yellow. F1 is almost entirely yellow, except for narrow darker ring at apex; first half of F2 yellow, second half is brown. Remainder of antennae dark brown. Mesoscutum and propodeum brown, petiole light brown. Legs yellow. Metasoma (=abdomen) and ovipositor sheaths brown. Fore wing venation brown.

Body length. 2.1 mm.

Male. Head with slightly larger eyes than in female (Fig. 2A View Figure 2 ). Tentorial index (tentoriocular line/intertentorial line) 0.35. Malar space equal to 0.21 of longitudinal eye diameter. Maxillary palps with 4 very long palpomeres, labial palps with 3 palpomeres. Antennae filiform with 23 antennomeres, stouter than in female (Fig. 2B View Figure 2 ). F1 and F2 are subequal, 1.8-1.9 as long as wide, bearing 8 and 9 longitudinal placodes, respectively (Fig. 2C View Figure 2 ). Mesoscutum with slightly shorter notaulices than in female (Fig. 2D View Figure 2 ). Propodeum with central areola (Fig. 2E View Figure 2 ). External areolae with 3-4 setae, dentiparal areolae smooth. Petiole 1.6 times as long as wide, with protrudent spiracles (Fig. 2F View Figure 2 ). Pterostigma 2.9-3.0 as long as wide; R1 vein longer than in female (pterostigma/R1 vein length ratio 1.78-1.79) (Fig. 2H View Figure 2 ). Genitalia as in Figure 2G View Figure 2 . Body generally darker than in female, flagellomeres entirely brown.