Dasybasis senilis (Philippi)

González, Christian R., Brevis, Karina, Miranda, Carmen & Sotomayor, Arlen, 2005, Comparative study of mouthparts of the female of two species of Dasybasis Macquart from Chile (Diptera: Tabanidae), Zootaxa 1058, pp. 35-41 : 37-38

Dasybasis senilis (Philippi)

Mandibles: ( Fig. 1 ) Total mean length = 0.330 mm. Greatest mean width 0.019 mm. Medial margin with scarcely curved, pointed and with triangular teeth; lateral margin without teeth. Apex rounded, without apical teeth. Ventral and dorsal surface bare.

Lacinia : ( Fig. 2 ) Total mean length = 0.29 mm. Greatest mean width 0.005 mm. Apex of the dorsal surface with 2–9 teeth, flattened apically and more erect proximally, retrorse. Dorsolateral surface with short, uniform and sparse micropilosity. Dorsomedial surface, distal to the apical teeth, bare. Ventral surface bare.

Labrum: ( Fig. 3 ) Total mean length = 0.283 mm. Greatest mean width 0.037 mm. Apex blunt. Dorsal surface with abundant and short microtrichiae; medially swollen, convex and bare. Apex with erect and triangular apical microteeth and circular depressions. Ventral surface without micropilosity.

Hypopharynx: ( Fig. 4 ) Total mean length = 0.22 mm. Greatest mean width 0.015 mm. Apex acute. Without micropilosity or other ornamentation. Dorsomedial surface smooth, bare; salivary duct opening in the apex. Ventral surface rugose, bare.

Figures

FIGURES 1 – 4. Dasybasis senilis (Philippi), female. 1, mandible; 2 dorsal view of laciniae; 3, ventral view of labra; 4, ventral view of hypopharynx. Scale bars 1, 3, 4: 10 um; 2: 100 um