Distinctamyia, Proença & Maia, 2021

Proença, Barbara & Maia, Valéria Cid, 2021, New genus and species of Schizomyiina (Diptera, Cecidomyiidae) from Brazil, Papéis Avulsos de Zoologia (Pap. Avulsos Zool., S. Paulo) 61, pp. 1-9 : 3

Distinctamyia gen. nov., Proença & Maia

Diagnose: Adult: Palpus 1 or 2-segmented. Males and females with irregular and reticulated circumfila. R s vestigial, R₅ slightly curved reaching C just after the wing apex; CuA bifurcated. Tarsal claws simple, bent before its midlenght, empodia shorter than the bend in claws. Male cerci with deep triangular lobes, shorter than gonocoxites; parameres present. Ovipositor protrusible, female cerci fused. Pupa: antennal horns short and simple, frontal horns absent, prothoracic spiracle short, abdominal segments without dorsal spines. Larvae: spatula with two apical teeth, one pair of setose lateral papillae, one pair of terminal papillae with setae subequal in length.

Description: Adult head ( Figs. 2-4 ): Eyes join one another at the vertex, antennae with 12 cylindrical flagellomeres, flagellomeres 1 and 2 not connate, circumfila reticulated in both sexes. Female with flagellomeres 1 and 12 shorter than rest. Palpus one or two-segmented. Thorax ( Figs. 5-6 ): R₁ reaching C before wing midlength, R s and Sc absent, R₅ slightly bent reaching C immediately before wing apex, M₃ evanescent, CuA bifurcated ( Fig. 5 ). First tarsomere of each leg without apical projection; tarsal claws simple, bent slightly before the midlength; empodia rudimentary ( Fig. 6 ). Abdomen ( Figs. 7 and 9 ): tergite 8 not sclerotized, without any vestiture, sternite 8 shorter than the others in males; tergite 8 sclerotized, narrower than rest and sternite 8 not sclerotized in females. Male terminalia ( Fig. 8 ): cerci bilobed, hypoproct slightly bilobed, aedeagus wide, parameres present. Ovipositor ( Fig. 10 ): soft, protrusible, gradually tapered to apex; cerci fused.

Pupal exuvia ( Fig. 11 ): Antennal horns short, prothoracic spiracle short, abdominal segments without spines.

Larva ( Figs. 15 and 16 ): spatula well sclerotized, with two apical teeth and shaft developed. One pair of lateral papillae with seta; one pair of terminal papillae with seta.

Type species: Distinctamyia matogrossensis sp. nov., ProenÇa & Maia .

Distinctamyia matogrossensis sp. nov.,

Figures

Figures 2-8. Distinctamyia matogrossensis Proença & Maia. (2) male head (frontal view) with 2-segmented palpus. In detail: one-segmented palpus; (3) male flagellomere V; (4) female flagellomereV;(5) male wing;(6) female hind leg:claws and empodium (lateral view);(7) male abdomen,segments 6-8 (lateral view); (8) male terminalia(dorsal view).

Figures 9-12. Distinctamyia matogrossensisProença & Maia.(9) female abdomen,segments 6-8 (lateral view);(10) ovipositor (lateral view).In detail,female cerci dorsolateral view;(11) pupal exuviae:cephalic region and prothoracic spiracle (frontalview);(12) pupal exuviae:antennal horn.

Figures 13-18. Distinctamyia matogrossensis Proença & Maia. (13-14) sexual dimorphism on pupal exuviae:(13) male’s pupal exuvia: terminal segment (ventral view);(14)female’s pupal exuvia:terminal segment (ventral view);(15) larva,general aspect (ventral view);(16-17)larval spatula:(16)truncated shaft and lateral papillae (ventral view);(17) shaft with basal lateral projections and lateral papillae (ventral view);(18) larva:terminal segments (ventral view).