Crabro scutellatus (von Scheven, 1781)

Stetsun, Halyna, 2021, Superimposition of the sting morphological characters on the dendrogram of Apoidea with emphasis on Crabronidae s. str. (Insecta: Hymenoptera): first steps, Journal of Natural History 54 (31 - 32), pp. 1957-1972 : 1960

Crabro scutellatus ( Figure 3 )

This species has been analysed by Stetsun et al. (2019) so here we focus on the details omitted previously. The posteromedial membranous incision of the lateral part of the tergite 9 is not deep ( Figure 3b ). The valvillus comprises only one flap ( Figure 3i ). The ventral process of the 1st valvula is absent ( Figure 3j ). Apical cone-shaped process of the 3rd valvula is small ( Figure 3g ), not pronounced. The dorsal arm of furcula is approximately as wide as ventral ones ( Figure 3c ).

Figures

Figure 3. Sting parts of Crabro scutellatus. (a) – lateral parts of tergite 9, dorsal view; (b) – lateral sclerite of tergite 9, medial view; (c) – furcula, lateral view; (d) – 2nd valvula, lateral view, scale bar; (e) – the 2nd ramus, fused with the rostral process of the 2nd valvifer, laterofrontal view; (f) – the 3rd valvula, lateral view; (g) – apical cone-shaped process of the 3rd valvula, laterodorsal view; (h) – the 1st valvula +1st ramus+1st valvifer+2ndramus+2nd valvifer; (i)–valvillus, medial view; (j) – the 1st and 2nd valvulae, lateral view. A-D – LM; E-J – SEM. Arrowheads indicate regions of interest. Scale bars: 200 µm in A and D; 100 µm – in B, F, H; 50 µm – in C; 20 µm – in E, G, I, J. l – lateral direction; p – posterior direction; v– ventral direction.