Esenbeckia (P.) fascipennis (Macquart)

González, Christian R. & Flores, Paola, 2004, Comparative study of mouthparts of three species of horse flies of the tribe Pangoniini of Chilean distribution (Diptera: Tabanidae), Zootaxa 579, pp. 1-15 : 4-6

Esenbeckia (P.) fascipennis (Macquart)

MALE

Mandibles: Absent.

Lacinia : ( Fig. 1 ) Total mean length = 1,354 µm (1.354 mm) (n = 10). Greatest mean width = 59.5 µm (n = 10). Apex rounded. Dorsal surface without teeth, and with abundant and uniform micropilosity, replaced towards the apex by triangular spicules approximately 8­10 um, oriented cross­sectionally to its base. Ventral surface with short micropilosity, uniformly distributed to the apex.

Labrum: ( Fig. 2 ) Total mean length = 1,440 µm (1.440 mm) (n = 10). Greatest mean width = 178 µm (n = 10). Dorsal surface with abundant micropilosity, medially intermingled with short microtrichiae increasing in number when approaching the apex; proximally with smaller microtrichiae, without apical microteeth. Ventral surface with abundant micropilosity along the edges, center smooth.

Hypopharynx: ( Fig. 3 ) Total mean length = 1,658 µm (1.658 mm)(n = 10). Greatest mean width = 155 µm (n = 10). Apex acute. Dorsal surface smooth, opening of salivary duct approximately 140 um before the apex, without micropilosity on its interior or margins. Apex without micropilosity or other ornamentation. Ventral surface bare.

FEMALE

Mandibles: ( Fig. 4 ). Total mean length = 1,927 µm (1.927 mm)(n = 10) Greatest mean width = 206 µm (n = 10). Medial and lateral margin with developed curved, pointed and triangular teeth, although more developed on the medial margin. Lateral marginal teeth oriented toward the mandibular insertion. Apex with apical teeth pointed and inclined slightly towards the medial margin. Ventral and dorsal surface bare.

Lacinia : ( Fig. 5 ). Total mean length = 1,636 µm (1.636 mm) (n = 10). Greatest mean width = 72.3 µm (n = 10). Apex of the dorsal surface with 3­12 teeth, flattened apically and more erect proximally, retrorse. Dorsolateral surface with long, uniform and abundant micropilosity. Dorsomedial surface, distal to the apical teeth, bare. Ventral surface bare.

Labrum: ( Fig. 6 ). Total mean length = 1,656 µm (1.656 mm) (n = 10). Greatest mean width = 268.8 µm (n = 10). Apex blunt. Dorsal surface with abundant and short microtrichiae, arranged in horizontal rows; medially swollen, convex and bare. Apex with flattened and triangular apical microteeth and circular depressions. Ventral surface with sparse micropilosity distributed along the margins. Smooth central area, with short, uniformly spaced micropilosity.

Hypopharynx: ( Fig. 7 ). Total mean length = 1,637 µm (1.637 mm) (n = 10). Greatest mean width = 143, 1 µm (n = 10). Apex acute. Without micropilosity or other ornamentation. Dorsomedial surface smooth, bare; salivary duct opening approximately 170 μm before the apex. Ventral surface rugose, bare.

Figures

FIGURES 1 – 3. Esenbeckia (P.) fascipennis, male. 1, dorsal view of laciniae; 2, dorsal view of labra; 3, ventral view of hypopharynx. Scale bars 1, 2: 10 µm; 3: 100 µm

FIGURES 4 – 7. Esenbeckia (P.) fascipennis, female. 4, mandible; 5, dorsal view of laciniae; 6, dorsal view of labra; 7, ventral view of hypopharynx. Scale bars 4, 6: 10 µm; 5, 7: 100 µm