Caladomyia angelae, Trivinho-Strixino, Susana, 2012

Trivinho-Strixino, Susana, 2012, A systematic review of Neotropical Caladomyia Säwedal (Diptera: Chironomidae), Zootaxa 3495, pp. 1-41 : 11-13

Caladomyia angelae sp. n.

( Figs 14–15 )

Type material. Holotype: male (in Euparal), BRAZIL, SP, Cubatão, Córrego Cambuci (23° 54’ S, 46° 28’ W), leg. F. O. Roque, 04/xi/2001 (C1–01, LEIA /UFSCar).

Etymology. Named in honor of Dr. Angela Sanseverino, my friend and great student of Brazilian Tanytarsini .

Diagnostic characters. The male of Caladomyia angelae differs from other species of the genus by the combination of the following characters: thorax with brown band; AR 0.4; fore leg ratio 3.09; hypopygium with anal tergite bands Y-shaped, fused part 31.4 µm long; anal point 30 µm long, with tip not divided into protrusions; bars 11.3 µm long; digitus well developed, reaching median margin of superior volsella.

Description

Male (n = 1)

Dimensions. Small, length about 1.8 mm. Wing length 1.02 mm.

Coloration. Head yellow, flagellum brown, maxillary palp yellowish. Thorax yellow-green with brown transversal band in anterior and lateral part of mesothorax, scutellum yellow, postnotum brown ( Fig. 14 ). Abdomen yellow. Legs yellow, distal part of all femora brown.

Head. Eyes ratio 3.8. Antennal flagellum 669 µm long; AR 0.45. Palpomeres 2–5 lengths: 25, 63, 90, 151 µm. Frontal tubercles short, 6.2 µm long. Temporal setae 6, uniserial. Clypeus with 11 setae.

Thorax. Ac 6, beginning near antepronotum; Dc 3; Pa 1, Scts 2. Halteres with 3 setae.

Wing. Width 0.32 mm. VR 0.7. WW 0.32. Brachiolum with 1 seta.

Legs. Front tibia with short slender white spur 20 µm long. Mid and hind tibiae with two black combs, each with one spur. Lengths and proportions as in Table 3.

fe Ti ta1 ta2 ta3 ta4 ta5 LR p1 506 219 675 325 262 194 106 3.09 p2 513 381 212 106 69 31 31 0.56 p3 525 469 312 200 169 94 63 0.67 Hypopygium ( Fig. 15 ). Anal tergite 55 µm long, with 2 distal tergite setae. Anal tergite bands Y-shaped; fused part about 31 µm long. Anal point 30 µm long, elongated with rounded tip, lateral margins with 8 setae; AnPr 12. Anal point bars short 11 µm long, on basis of anal point, their tips not reaching apex of anal point; AnPBR 2.8. Superior volsella subrectangular with 4 dorsal setae and 2 setae on anterior part of internal margin (one dorsal, one ventral). Digitus 32 µm long reaching beyond posteromedian corner of superior volsella. Inferior volsella bent in median part, extending beyond median length of gonostylus, tip slightly folded. Median volsella short 16.9 µm long, with 2 lamelliform and 4 simple setae. Gonostylus 58 µm long. Hypopygium ratio 0.95.

Remarks. The main characteristics that differentiate the male of C. angelae sp. n. from other Caladomyia species are the shape of the anal point and the coloration of the thorax. The anal point shape is similar to C. tuberculata (Reiss 1972) but this species can be separated from C. angelae by the absence of anal point bars and absence of brown band coloration on thorax.

The adult male was collected in emergent net over a small stream in littoral zone of São Paulo state.

Figures

FIGURES 14 – 16. Caladomyia angelae sp. n. Male. 14. Thorax, lateral. 15. Hypopygium, dorsal (left), ventral (right). Caladomyia carolae sp. n. Male. 16. Hypopygium, dorsal (left), ventral (right).