Allodynerus rossii (Lepeletier)

Tormos, José, Polidori, Carlo, Asís, Josep Daniel & Gayubo, S. F., 2008, Description of mature larvae of Allodynerus rossii (Lepeletier), Ancistrocerus auctus (Fabricius), Euodynerus dantici (Rossi) and Symmorphus murarius (Linnaeus) (Hymenoptera, Vespidae), Zootaxa 1946, pp. 42-54 : 43-44

Allodynerus rossii (Lepeletier)

( Figs. 1–5)

A nest of this species (length = 68 mm; diameter = 4 mm) was obtained from a trap-nest (number 664) placed in Ticino Regional Park ( Riserva Orientata La Fagiana , Milano, Italy) in 2003. The nest had 2 cells 13 mm long on average, from one of which a female emerged (September 2003); the larva employed for the description was obtained from the other. The nest lacked of the typical mud closing plug, revealing that it was not completely provisioned at the moment of removal .

Body ( Fig. 1) (l = 11 mm, maximum w = 2.8 mm) fusiform, robust, with some segments divided into two annulets by transverse crease. Anus terminal, as transverse slit. Pleural lobes developed. Integument with scattered setae (l = 15–25 µm). Spiracles (d = 170–175 µm) with walls of atrium with asperities; opening into subatrium spinulose; subatrium with several swellings.

Cranium (w = 1.7 mm, h (exclusive of labrum) = 1.2 mm) with sparse setae (l = 10 µm) and sensilla. Coronal suture absent and parietal bands present. Antennae ( Fig. 2) (d = 90 µm) circular, with 3 sensilla. Labrum ( Fig. 4a) (w = 410 µm) emarginate, with 34 sensilla (w = 6–7 µm) of which 4 (5 x 4 µm) are marginal and protuberant. Epipharynx ( Fig. 4b) spinulose, with 8 sensilla (w = 5 µm) situated in central position, distributed in two areas with 4 sensilla on each.

Mouthparts. Mandible ( Fig. 4) (l = 550 µm, w = 280 µm) tridentate. Maxilla ( Fig. 5a) (w = 310 µm) spinulose on lacinial area and with several setae (l = 15–25 µm) on external part. Maxillary palpus ( Fig. 5 ab) (h = 75 µm, w = 50 µm) with 4 apical sensilla; galea ( Fig. 5 ac) (l = 50 µm, w = 25 µm) with 2 apical sensilla. Labium ( Fig. 5b) (w = 370 µm) spinulose dorsally to salivary orifice; labial palpus (45 x 35 µm) with 5 apical sensilla; prementum with 5 setae (l = 10–15 µm) around each palpus; salivary orifice as transverse slit (w = 250 µm).