Nomada mitaii Proshchalykin

Yu, Maxim & Lelej, Arkady S., 2010, Review of the Nomada roberjeotiana species-group (Hymenoptera: Apidae) of Russia, with description of new species, Zootaxa 2335, pp. 1-15 : 6-8

Nomada mitaii Proshchalykin , sp. nov.

( Figs. 6–8 , 10–12 )

Diagnosis of male. The new species can be easily differentiated from other members of the Nomada roberjeotiana species-group by having a 12-segmented antenna ( Fig. 10 ) and by having the fore wing with two submarginal cells (except Nomada koikensis ). Nomada mitaii is most similar to the Eastern Palaearctic species N. koikensis , but differs by having an almost black scutellum ( Fig. 11 ) (with pair bright yellow maculae in N. koikensis ), by having another genitalia and S8 ( Figs 6, 8 vs Figs 3,5).

Diagnosis of female. This new species can be distinguished from other species of the Nomada roberjeotiana species-group by having two submarginal cells of the fore wing (except N. koikensis ). Nomada mitaii is most similar to N. koikensis , but differs by having a dark brown scutellum (black in N. koikensis ), and by having a relatively dull, minutely wrinkled propodeum outside the metapostnotum (polished without punctures in N. koikensis ).

Description of male. Body length 4.5–5.8 mm (holotype 5.6 mm). Fore wing length 3.8–4.1 mm (holotype 4.0 mm). Head wider than long; width 1.7 mm, length 1.3 mm. Mandible simple and pointed apically. Labrum wider than long; width 0.6 mm, length 0.4 mm. Flagellar length 2.4 mm. Relation of first three flagellomeres 1: 1.1: 0.9. Malar space exceedingly short, base of mandible almost touching compound eye. Gena well developed, about half as broad as compound eye. Preoccipital ridge distinctly carinate throughout the head. Interantennal elevation with longitudinal keeled carina. Clypeus weakly convex; length 0.38 mm, width 0.95 mm. Antenna 12-segmented. Scape cylindrical, gradually widened apically. Distance between antennal sockets 0.25 mm. Scutellum moderately elevated and shallowly furrowed medially. Fore wing with two submarginal cells. Genitalia and S7, S8 as in Figs. 6–8 .

Labrum and face with small, dense, distinct punctures. Mesoscutum, scutellum, and mesopleuron deeply and densely punctate. Lateral and dorsal surface of propodeum (outside metapostnotum) nearly smooth and shiny. Metapostnotum weakly rugose anteriorly, minutely wrinkled posteriorly. T1 impunctate, T2–T6 finely punctured except broad posterior area of each tergum. Labrum with long dense white setae. Clypeus and supraclypeal area with dense recumbent plumose white setae. Scape with erect white setae. Mesosoma with short sparse whitish setae, propodeum almost bare. Metasoma with short sparse whitish setae, S6 with rather conspicuous lateral tuft of silver setae. Head and mesosoma black with following bright yellow portions: mandible except apical one third, labrum, clypeus, malar space, lower portion of paraocular area, tegula, and pronotal lobe. Flagellum brown dorsally and pale brown ventrally. Scape brown dorsally and bright yellow ventrally. Metasoma black, T2 and T3 with pair large yellow maculae, T4 with pair narrow yellow maculae, T5 with four small yellow spots. Fore, mid, and hind coxae and trochanters blackish-brown. Fore, mid, and hind femora and tibiae yellow with brownish portions outside. Tarsi yellow.

Description of female. Body length 5.0–6.0 mm. Fore wing length 3.8–4.1 mm. Head wider than long; width 1.7 mm, length 1.3 mm. Mandible simple and pointed apically. Labrum wider than long; width 0.6 mm, length 0.4 mm. Flagellum length 2.4 mm. Malar space exceedingly short, base of mandible almost touching compound eye. Gena well developed, about half as broad as compound eye. Preoccipital ridge distinctly carinate throughout the head. Interantennal elevation with longitudinal keeled carina. Clypeus weakly convex, length 0.36 mm, width 0.92 mm. Scape cylindrical, gradually widened apically. Distance between antennal sockets 0.25 mm. Relative length of first three flagellomeres 1.0: 0.8: 0.8. Pronotal collar with strong transverse anterior carina. Scutellum moderately elevated and shallowly furrowed medially. Hypoepimeral area gently raised. Hind tibia with three to five apicomedian brown short acute setae. Fore wing with two submarginal cells.

Labrum and face with small dense distinct punctures. Mesoscutum, scutellum, and mesopleuron with deep dense punctures. Lateral and dorsal surface (outside metapostnotum) of propodeum minutely wrinkled, not shining. Metapostnotum weakly rugose. T1 impunctate, T2–T6 finely punctured except broad posterior area of each tergum. Labrum with white moderately long dense setae. Clypeus and supraclypeal area with white sparse setae. Scape with white erect setae. Mesosoma and metasoma with short sparse whitish setae, propodeum almost bare. Head and mesosoma black with following brown portions: mandible, labrum, apical margin of clypeus, malar space, tegula, pronotal lobe, antenna. Scutellum, metanotum ( Fig. 12 ), and legs dark brown, fore tarsus pale brown. Metasoma black. T2 with pair small yellow maculae. Pseudopygidium on T5 translucent.

Holotype data: ♂, Russia: Primorskiy Terr., Khasan, 13.VIII.1998 ( SAB) [ IBSS].

Paratype data: Russia: Primorskiy Terr.: 2 ♀, 12 ♂, Khasan, 27.VIII.1988, 13.VIII.1998, 30.VIII.2003; 3 ♀, 12 ♂, Spassk, 25.VI.1993, 3–5.IX.1995, 17.VIII.1998; 1 ♀, 20 km SW Krounovka, 5.VIII.1998; 1 ♀, 3 ♂, 15 km E Pos'et, 16.VIII.1998; 1 ♀, 1 ♂, 15 km SW Slavyanka, 1.IX.1995, 23.VIII.2003; 2 ♀, 6 ♂, 25 km SW Slavyanka, 18.VIII.1998; 1 ♂, 10 km SE Chernigovka, 26.VIII.1998; 1 ♀, Novokachalinsk, 13– 16.VIII.2003 ( SAB). Jewish Autonomous Prov.: 1 ♀, 2 ♂, 40 km N Amurzet, 27.VII.1981; 1 ♀, 1 ♂, Amurzet, 30.VII.1981 (DRK). Amurskaya Prov.: 1 ♀, 2 ♂, Kundur, 26.VII.1988 (ASL); Zabaikalskiy Terr.: 1 ♀, Kalga, 12.VIII.1975; 2 ♂, 16 km ENE Nerchinskiy Zavod, 22.VII.1975; 4 ♀, 10 ♂, 7 km W Priargunsk, 25.VII.1975 (DRK); 1 ♀, 20 km SSE Krasnokamensk, 3.VIII.2007 (ASL, MYP, Loktionov) [all are deposited in IBSS and ZIN]. Mongolia: 1 ♀, “Chentej aimak, 7 km NO von Somon Mörön, 1200 m, 28–29.VII.1965, Nr. 319, Exp. Dr. Z.Kaszab, 1965” [temporary deposited in ELKU]; 1 ♂, “Central aimak, 25 km O von Somon Lun, 1200 m, 25.VII.1968, Nr. 1146, Exp. Dr. Z.Kaszab, 1968” [temporarily deposited in ELKU]. K. Mitai placed an additional red label for the specimens from Mongolia: “ Paratype / Nomada mitaii / Proshchalykin sp. nov. ”

Distribution. Russia ( Fig. 2 ) (Primorskiy Terr., Jewish Autonomous Prov., Amurskaya Prov., Zabaikalskiy Terr.), Mongolia.

Host. Unknown.

Etymology. The specific name is dedicated to Katsushi Mitai who recognized this species as a new one and also kindly sent us the collecting data of his two specimens.

Figures

FIGURE 2. Distribution map of Nomada roberjeotiana species-group in Russia.

FIGURES 3 – 9. 3 – 5. Nomada koikensis, male (from Hirashima & Tadauchi 2002). 3. genitalia, dorsal view; 4. S 7, ventral view; 5. S 8, ventral view. 6 – 8. N. mitaii sp. nov. (male, holotype). 6. genitalia, dorsal view; 7. S 7, ventral view; 8. S 8, ventral view; 9. N. setteri sp. nov. (female, holotype). 9. Apical part of hind tibia, ventral view. Scale = 1.0 mm.

FIGURES 10 – 15. 10 – 12. Nomada mitaii sp. nov. (10, 11 — male, holotype; 12 — female, paratype). 10. face; 11, 12. dorsal view. 13 – 15. N. setteri sp. nov. (13, 14 — female, holotype; 15 — female, paratype). 13. lateral view; 14. dorsal view; 15. metasoma, dorsal view.