Colonomyia sp.

DE SOUZA AMORIM, DALTON & RINDAL, EIRIK, 2007, Phylogeny of the Mycetophiliformia, with proposal of the subfamilies Heterotrichinae, Ohakuneinae, and Chiletrichinae for the Rangomaramidae (Diptera, Bibionomorpha), Zootaxa 1535 (1), pp. 1-92 : 17-18

Colonomyia sp.

( Figs. 28–31 )

Material examined. ♀, ARGENTINA, Rio Negro, Nov1926, R &E Shannon, Porto Blest, xii.2.26; ♀, CHILE, 49ºS. Puerto Edén, Isla Wellington, 28-XI-1958. 1300 ft., Royal Society Chilean exped. 1959 ( NHM) .

Description. Male. Unknown. Female. Total length, 3.16 mm. Wing length, 3.28–3.52 mm. Head.

Scape, pedicellus, and flagellum dark brown, flagellomere, long, 4.0 times width, and densely setose (both flagella broken). Frons light brown with some setae. Palpus yellow, except darker segment 1, very long, twice length of head, last segment 1.75 times longer than penultimate. Labella yellow. Stipes long, shining yellow. Occiput dark brown. Thorax. Shining blackish brown with pair of rows of dc setae. Scutellum blackish brown. Pleural sclerites shining blackish brown, except katepisternum covered with silvery pruinescence, and brownish episternum II. Halter brownish yellow. Coxae long, brownish yellow at base, trochanters brownish, femora yellow, long, tibiae ochre-brown, tarsi brown. Tibia 1 with spur on inner ventral apex, and unmodified area on apex with row of setae. Abdomen. Tergites 1–4 and 6 dark shining brown, tergite 5 yellow. Tergite 1 large, sternites narrow, not visible on dry specimen. Genitalia black.

Comments. These two females seem to be conspecific and present some differences in relation to the remaining specimens of Colonomyia . The female terminalia resemble those of C. magellanica ( Hippa & Jaschhof 2004, Fig. 20 ), possibly due to plesiomorphy. The specimens are considerably larger than all remaining species of the genus, with more than 3.0 mm total length and wing length, whereas all other Neotropical species vary from 1.9 to 2.8 mm. Differences in a number of features between Colonomyia sp. and the remaining species of the genus resulted in topologies in the phylogenetic analysis in which the species fits either with the remaining specimens of Colonomyia or closer to Ohakunea . Knowledge of the male is needed before drawing further conclusions.

Figures

FIGURES 28–31. Colonomyia sp. 28. Head, frontolateral view. 29. Base of wing. 30. Wing. 31. Female terminalia, ventral view.

FIGURES 20–21. Colonomyia brasiliana, sp. n. 20. Thorax. 21. Male terminalia.