Perilampus aeneus (Rossius, 1790)

Mitroiu, Mircea-Dan & Koutsoukos, Evangelos, 2023, Perilampus neglectus and other neglected species: new records of Palaearctic Perilampidae (Hymenoptera, Chalcidoidea), with a key to European species of Perilampus, Journal of Hymenoptera Research 96, pp. 57-99 : 57

Perilampus aeneus (Rossius, 1790)

Fig. 2

Chalcis aenea Rossius, 1790 in Rossi (1790: 59).

Cynips italica Fabricius, 1793: 103. Synonymy by Steffan (1952: 73).

Diagnosis.

Head and mesosoma except propodeum dorsally bright bronze green, head sometimes bluish; propodeum and metasoma blue green; female flagellum black. Body size: 2.50-5.00 mm. Head shape in frontal view (Fig. 2A, B ) much wider than high. Head in lateral view not unusually long, without distinct sulcus separating posterior eye margin from temple. Clypeal margin (Fig. 2A, B ) truncate. Supraclypeal area (Fig. 2A, B ) slightly transverse (less than 1.5 × as wide as high), sides not defined; in male without oval lateral impressions. Malar sulcus versus anterior margin of malar depression shorter in female, about equal in male. Frontal keels (Fig. 2A, B ) well developed. Face between scrobes and eye (Fig. 2A, B ) almost smooth. Face between clypeus and eye (Fig. 2A, B ) smooth. Lateral ocellus small (OOL at least twice the largest ocellar diameter). Funicular segments in female (Fig. 2A ): most segments quadrate to transverse. Male scape (Fig. 2B ) slightly widened distally; ventral pores on about half scape length. Mesosoma (Fig. 2C ) not narrow (less than 1.4 × as long as wide). Mesoscutum sculpture (Fig. 2C ) without smooth median tubercle; interspaces smaller than punctures, smooth. Scutellum hind margin (Fig. 2C ) without a double carina, with large bilobed protruding projection. Prepectus (Fig. 2D ) wide, dorsal margin longer than pronotal collar; well defined anteriorly (i.e. suture with pronotum very distinct); all sides with punctures, leaving a large smooth central area.

Material examined.

Greece: 1♀, " Kerkini Lake N. Park , Promohonas , Procom site, Malaise, 23.V to 29.V.2007, 41°22'38.1"N, 23°21'58.8"E, Leg. Gordon Ramel" (MICO) ; 1♀, " Kerkini Lake N. Park , Promohonas , Procom site, Malaise, 22-28.VIII.2007, 41°22'38.1"N, 23°21'58.8"E, Leg. Gordon Ramel" (MICO) ; 1♀, " Kerkini lake ; Malaise trap; Krousia Mts. Site, 12.IX to 18.IX.2007, 41°11'32.4"N, 23°03'59.5"E, Leg. Gordon Ramel" (MICO) ; 3♀♀, " Kerkini Lake N. Park , Kerkini , Krousia Mts site, Malaise tr., 13.VI-19.VI.2007, 41°11'32.4"N, 23°03'59.5" E, 190 m, Leg. Gordon Ramel" (MICO) ; 1♂, " Rizari , nr. Edessa, 40.792366°N, 22.107232°E ", "OP cherry, M2 - P1-2, 3.05.2019, leg. F. Karamaouna " (MICO) .

Romania: 1♀, "IS, Ciric-Izvor, 10.VIII.2006, leg. M.-D. Mitroiu " (MICO); 1♀, " Iași county, Valea lui David Natural Reserve, 02.viii.1998, sweep, M.-D. Mitroiu leg." (MICO); 1♀, " Brăila county, Smârdan, 30.viii.2005, herbaceous vegetation along canal, Popovici O. & Moglan I." (MICO); 1♀, 1♂, " Tulcea county, near Babadag, 15-17.v.2009, L. Fusu leg." (MICO); 1♂, " Constanța county, Gura Dobrogei Natural Reserve , 12.v.2007, L. Fusu leg." (MICO) . Turkey: 1♀, " Turkey: Kastamonu, Kastamonu area, 18.vii.1962, 1000 m ", "Guichard & Harvey, B.M. 1962-299", " ♀ Perilampus Perilampus (Rossius), Z. Bouček det. 1972" (NHMUK); 1♂, " Turkey: Amasya, Alt. I. 400 Ft", " 6.6.1959, K.M. Guichard ", " ♂ Perilampus Perilampus (Rossius), Z. Bouček det. 1972" (NHMUK) .

Hosts.

Associated with Curculionidae ( Coleoptera ), Tenthredinidae ( Hymenoptera ), and Tortricidae ( Lepidoptera ); presumably a hyperparasitoid.

Distribution.

Bosnia Herzegovina, Croatia, Czechia, Germany, Hungary, Italy, Moldova, Netherlands, Russia, Serbia, Slovakia, Spain, Sweden, Turkey, United Kingdom. New species to Greece and Romania.

Comments.

Perilampus aeneus is somewhat similar to P. eximius and P. ruficornis due to its bright colour and presence of frontal keels. From both species it can be separated by the sculpture of the prepectus, which has a complete (although sometimes shallow) row of punctures near its anterior margin (Fig. 2D ), and the bigger ocelli (Fig. 2C ). Furthermore, the female of P. aeneus can be separated from the females of the previously mentioned species by the colour of the flagellum, which is black and not reddish (Fig. 2A ).

Figures

Figure 2. Perilampus aeneus A female, head in frontal view (insert: detail of the genal area) B male, head in frontal view (insert: detail of scape) C female, head and mesosoma, dorsal view D female, prepectus.