Corynoneura

Wiedenbrug, Sofia & Trivinho-Strixino, Susana, 2011, New species of the genus Corynoneura Winnertz (Diptera, Chironomidae) from Brazil, Zootaxa 2822, pp. 1-40 : 37-38

Corynoneura sp. sexadentata

( Figs 24–25 )

Material examined. Three females with pupal and larval exuviae, BRAZIL, SP, Ubatuba, stream besides Ruínas da Lagoinha, 23˚30.468´S, 45˚11.923´W, 0 m a.s.l., 16.x.2008, S. Wiedenbrug. One female with pupal and larval exuviae same data as before but stream besides Ruínas da Lagoinha, Cachoreira do Véu 23˚30.404´S, 45˚12.340´W, 116 m a.s.l., 29.xii.2009 (UFSCAR MPSW 057).

Diagnostic characters. Female and pupa are not separable from C. septadentata , the only difference between both species is the larval mentum of sp. sexadentata that has six median teeth and instead of seven ( Fig. 25 E).

Remarks. Unfortunately the male of this morphotype is still unknown. All females of C. sp. sexadentata were collected in Ubatuba (0 m a.s.l.), and specimens of C. septadentata in the Parque Estadual do Jaraguá (about 1000 m a.s.l.). It is possible that the difference on the mentum is a population variation, but only with the knowledge of the male and more material it would be possible to affirm that.

Figures

FIGURE 24. Corynoneura sp. s exadentata., female. A—wing. B—dorsal view of genitalia with labia, right: dorsal view of labia, left: ventral view of labia. C—ventral view of genitalia; left: gonapophysis removed.

FIGURE 25. Corynoneura sp. sexadentata., immatures. A – C—pupa. A—tergites I – IX and anal lobe, right: dorsal without fringe, left: ventral. B—sternites I – VIII. C—detail of tergite IV. D – I—larva. D—dorsal view of labrum. E—mentum. F—mandible. G—antenna. H—abdominal seta. I—sub-basal seta of posterior parapod.