Amazonimyia, Silva, Fabio Laurindo Da & Wiedenbrug, Sofia, 2015

Silva, Fabio Laurindo Da & Wiedenbrug, Sofia, 2015, Amazonimyia gigantea gen. n., sp. n., a new Tanypodinae (Diptera: Chironomidae) from the Neotropical Region, Zootaxa 3947 (2), pp. 275-281 : 275-276

Amazonimyia gen. n.

Type species. Amazonimyia gigantea sp. n.

Etymology. Derived from Amazonia, referring to the type locality in the Amazon Rainforest in northern Brazil, with the addition of the suffix -myia, meaning fly. Feminine gender.

Generic diagnosis. The genus can be separated from other Tanypodinae by the combination of the following characters. Adult male: thorax with scutal tubercle; costa not produced beyond R4+5, ending between M1+2 and M3+4; R2+3 present, R3 fading distally; MCu beyond FCu; tibial spurs with main tooth about ½ spur length and with smaller side teeth; hind tibial comb present; claws pointed; tergite IX with posterior row of setae, distal margin convex, volsella absent. Pupa: thoracic horn narrow; horn sac tubular, not filling the entire lumen, ending lateral in a short neck; plastron plate absent; corona present and perforate; thoracic comb present; tergite I with scar; abdominal segments with dense shagreen of spinules serially arranged in transverse rows; anal lobe triangular with inner margin spinose; male genital sac reaching the base of second anal macrosetae; anal macrosetae without adhesive sheaths.

Generic description. Adult male. Head. Antenna with 13 flagellomeres. Temporal setae irregularly biserial. Eyes bare, with dorsomedian extension. Cibarial pump with anterior margin concave. Palp developed normally. Thorax. Antepronotal lobes well developed, separated medially. Dorsocentrals irregularly uniserial. Scutal tubercle present. Anepisternal, preepisternal and postnotal setae absent.

Wing. Membrane covered with macrotrichia densely distributed apically. Costa not produced beyond R4+5, ending between M1+2 and M3+4. R2+3 present, R3 fading distally. MCu beyond FCu. Base of radial sector absent. Brachiolum and squama setose.

Legs. Fore tibia with single spur. Mid and hind legs with two spurs. Tibial spurs with main tooth about ½ spur length and few side teeth. Distal end of fore tibia with a few long setae. Hind tibial comb present. All legs with hook-shaped pointed claws. Pulvilli inconspicuous.

Hypopygium. Tergite IX convex, with irregular row of dorsal setae. Anal point present. Phallapodeme short and narrow. Sternapodeme narrow, distally curved backwards. Gonocoxite elongate and cylindrical, volsella absent. Gonostylus tapering toward the apex, with apical megaseta.

Pupa. Cephalothorax. Thorax dorsal rugose, with small tubercles anteriorly. Thoracic horn narrow, slightly arched, with spinules on the external membrane. Horn sac tubular, partially filling the respiratory atrium, ending lateral in a short neck. Plastron plate absent. Corona perforate. Reticulation on external membrane consisting of small punctuations. Thoracic comb of small rounded tubercles. Basal lobe present.

Abdomen. Tergites and sternites with dense shagreen composed of spinules serially arranged in transverse rows. Scar on T I present. TII-VI with at least one short taeniate lateral seta. T VII with 4 taeniate lateral setae. T VIII with 5 taeniate lateral setae. Anal lobe triangular, inner margin with hair-like spinules, two anal macrosetae, without adhesive sheaths. Genital sac shorter than anal lobe, reaching base of second anal macrosetae.