Caenopangonia cerdai, Krolow, Tiago Kütter, Henriques, Augusto Loureiro & González, Christian R., 2016

Krolow, Tiago Kütter, Henriques, Augusto Loureiro & González, Christian R., 2016, Taxonomic revision of the Neotropical genus Caenopangonia Kröber, 1930 (Diptera: Tabanidae), Zootaxa 4154 (5), pp. 541-558 : 548-550

Caenopangonia cerdai n. sp. Krolow, Henriques & González

( Figures 6 A–F, 7A–G)

Type locality. Chile, Til Til, Cerro El Roble.

Diagnosis. A robust species, grayish thorax with dark brown almost black scutal stripes, covered with mixed yellowish, orange and black hairs, wing infuscated with indistinct clouds on cross-veins, legs bicolored and a rounded orange brown abdomen.

Description, holotype Ƌ. Medium sized (14.0 mm) ( Fig. 6 A–B), wing 13.0 mm in length ( Fig. 6 E). Head. Frons, subcallus, parafacial, face, gena and occiput predominantly grayish ( Fig. 6 C–D); frons parallel-sided, with long black and some yellowish hairs, dense area of black hairs immediately above insertion of antenna ( Fig. 6 C); subcallus mostly with yellowish hairs but some black; face produced exceeding insertion of antenna and reaching apex of pedicel, with black and yellowish hairs ( Fig. 6 D); beard yellowish-white with a few black hairs ( Fig. 6 D); Antenna bicolored, scape and pedicel covered with grayish pollinosity, this absent in contrasting black flagellum; flagellum with eight flagellomeres, first flagellomere 1.5x longer than high; palpus nearly black with black and some long yellowish hairs on first segment, first segment longer than second, apex of second slightly enlarged; proboscis black and slender, more than two times longer than height of head, theca covered with short setae, labella very slender without any enlargement. Thorax. scutum grayish with scutal stripes dark brown, almost black, covered with mixed yellowish, orange and black hairs ( Fig. 6 A); pleuron dark grayish mostly with yellowish hairs ( Fig. 6 B); legs bicolored, coxae, trochanters and proximal 2/3 of femora dark grayish blending with color of pleuron; distal third of femora, tibiae and tarsi yellowish to orange with orange pilosity, except for dorsal sides of tibiae and tarsi are covered with dark pilosity; wing infuscated with indistinct clouds on cross-veins; cell r5 closed with long petiole, and with long appendix on R4 ( Fig. 6 E); calypteres with orange hairs. Abdomen. Rounded, orange brown, tergites II–III greatly enlarged, narrowing from tergites IV–VII with apex pointed; tergite I dark grayish with yellowish hairs ( Fig. 6 A); tergites II–III completely orange with pilosity of same color, except for large median row of black hairs covered by white haired triangles; tergites IV–VII darkened, covered with black hairs; traces of triangles are presents on tergites IV–VII (probably rubbed); sternite I grayish with black hairs; sternites II–IV orange with black hairs; sternites V–VII darkened with black hairs. Terminalia. hypandrium + gonocoxite very enlarged (distinctly wider than long) ( Fig. 7 A–B); gonocoxite with slight anterolateral projections; gonostylus apex truncated with large rounded lobe ( Fig. 7 A–B); ejaculatory apodeme narrowed anteriorly in dorsal and ventral views ( Fig. 7 A–B), enlarged and keel-like in lateral and anterior views ( Fig. 7 C–D); gonocoxal apodeme twisted, shorter than ejaculatory apodeme; parameral sheath triangular with apex slightly longer than gonocoxite ( Fig. 7 A–B); epandrium with lateral margins horseshoe-like, hollowed, forming two parts, joined by narrow posterior band ( Fig. 7 E–G); cercus slender with pointed apex.

Paratype variation. Body size 12.7–14 mm; palpus segments subequal in length.

Female. Unknown.

Distribution. Chile (Región Metropolitana, Chacabuco province, Til Til).

Type material: Holotype Ƌ. “[ CHILE], Til Til, C [err]o El Roble, [0] 8.ii.1994, Dr. M. Cerda ( MNHNS)” . Paratypes 4 Ƌ. “[ CHILE], Til Til, C [err]o El Roble, [0] 8.ii.1994, Dr. M. Cerda (Ƌ MNHNS)”; “[ CHILE], Til Til, C [err]o El Roble, 1700 m , 14.iii.1992, Dr. M. Cerda (2Ƌ MNHNS)”; “[ CHILE], Til Til, Caleu, C [err]o El Roble , 14.iii.1992, Dr. M. Cerda (Ƌ INPA)”.

Etymology. Specific epithet is a tribute to the medical doctor Miguel Cerda an enthusiastic amateur entomologist from Chile.

Comments. C. cerdai n. sp. differs from the other species of Caenopangonia in the following characters: face produced exceeding the insertion of antenna and reaching the apex of pedicel; antennae bicolored (shared with C. brevirostris ); abdomen rounded orange brown with apex pointed; hypandrium + gonocoxite enlarged; gonocoxite with slightly lateral projections; gonostylus apex with large rounded lobe.

Figures

FIGURE 6. Caenopangonia cerdai n. sp. Krolow, Henriques & González Ƌ (A – F). A: habitus dorsal view; B: habitus lateral view; C: head frontal view; D: head lateral view. E: wing dorsal view; F: labels.

FIGURE 7. Caenopangonia cerdai n. sp. Krolow, Henriques & González Ƌ (A – G). A – D: hypandrium, gonostylus, gonocoxite and aedeagus, respectively in dorsal, ventral, lateral and anterior views; E – G: epandrium, cerci and hypoproct, respectively in dorsal, ventral and lateral views.