Sphex (Fernaldina) lucae de Saussure, 1867

Willsch, Maraike, Friedrich, Frank, Baum, Daniel, Jurisch, Ivo & Ohl, Michael, 2020, A comparative description of the mesosomal musculature in Sphecidae and Ampulicidae (Hymenoptera, Apoidea) using 3 D techniques, Deutsche Entomologische Zeitschrift 67 (1), pp. 51-67 : 51

Sphex (Fernaldina) lucae de Saussure, 1867

Mesothorax.

Posterior thoracic spiracle occlusor muscle (sp3occ; Fig. 4A-D ) arises medial on the mesepimeral ridge, anterior to the mesofurcal arm, inserts on the posterior thoracic spiracle (sp2), which additionally is surrounded by pl2-t2b (anterodorsal), pl2a-fu2 (posterodorsal), and pl2-cx2b (ventral). The small tracheal occlusor muscle sp3occ is located submedial of pl2a-fu2. Second mesopleuro-mesocoxal muscle (pl2-cx2b; first description; Fig. 4A, C, D ) arises from the mesopleuron and partly from the mesopleural spiracle apodeme, fuses with pl2-cx2 and inserts dorsolaterally on the mesocoxa; it lies anteroventral to the mesepimeral ridge. Lateral mesofurco-mesotrochanteral muscle (fu2l-tr2; Fig. 4A, D ) arises from the anterior surface of the mesofurcal arm, runs lateral to fu2m-tr2 and fuses with the same, then both insert laterally on the mesotrochanteral apodeme; fu2l-tr2 is half the size of that in Sceliphron .

Metathorax.

Lateral metapecto-metafurcal muscle (pc3l-fu3) and metafurco-metacoxal muscle (fu3-cx3) are absent. Metasterno-metacoxal muscle (s3-cx3; first description; Fig. 4B ) arises from the metadiscrimenal lamella and inserts medially on the metacoxa.

Figures

Figure 4. The mesosomal musculature of Sphex (Fernaldina) lucae divergent to S. destillatorium; volume rendering, transparent exoskeleton. A. Lateral view, anterior to the left; B. Medial view, anterior to the right; C. Anterior view on the posterior thoracic spiracle occlusor; D. Dorsomedial view, anterior top right. Abbreviations: sp 3 occ - posterior thoracic spiracle occlusor; sp 2 - posterior spiracle; pl 2 - cx 2 - mesopleuro-mesocoxal; pl 2 - cx 2 b - second mesopleuro-mesocoxal; fu 2 l-tr 2 - lateral mesofurco-mesotrochanteral; fu 2 m-tr 2 - median mesofurco-mesotrochanteral; s 3 - cx 3 - metasterno-metacoxal; pl 3 m-cx 3 - median metapleuro metacoxal; fu 3 l-cx 3 - lateral metafurco metacoxal; fu 3 m-cx 3 - median metafurco metacoxal; pl 3 l-cx 3 - lateral metapleuro metacoxal; mepr - mesepimeral ridge. Scale bars: 0.7 mm (A), 0.6 mm (B), 0.3 mm (C), 0.5 mm (D).