Exsul alfredoi, Barbosa, Leandro Silva & Couri, Márcia Souto, 2013

Barbosa, Leandro Silva & Couri, Márcia Souto, 2013, New species and redescriptions of the New Zealand genus Exsul Hutton (Diptera: Muscidae: Coenosiinae), Zootaxa 3647 (2), pp. 382-389 : 386-389

Exsul alfredoi sp. n.

( Figs. 12–16 )

Holotype male, deposited at Auckland Museum.

Type-locality: New Zealand, southwest of South Island.

Diagnosis. Its appearance is very similar to E. tenuis differing as follows: dorsocentrals 4+4; katepisternals 2+3; notopleurals 4. Aedeagal apodema thicker than the others species, paramere end not pointed; sternite 5 rounded; cercal plate slender with upper concavity deeper than others species. Wings similar to E. tenuis .

Male. Body length: 10 mm; wing: 13 mm

General coloration. Similar to previous species.

Head. frontal row with six pairs of setae

Abdomen. Cylindrical.

Terminalia. Hypandrium plate-like. Aedeagus enlarged; distiphallus complex with sclerotized structure and distal membrane short; gonopod developed and paramere subrounded ( Fig. 12 ). Sternite 5 setulose, rounded ( Fig. 13 ). Cercal plate slender with a deep posterior concavity ( Fig. 14 ).

Female. Length: 11 mm, wing: 12 mm

Similar to Exsul tenuis female, except for dorsocentrals 4+4. Wings hyaline. Abdomen elliptic.

Ovipositor. Moderately long, with large tergites with setae on posterior edge. Sternite 6 broad and 7 arrowshape with six setae ( Fig. 15–16 ).

Etymology: The specific name is in honor of first author’s father, Carlos Alfredo Barbosa, present in all aspects of my life.

Material examined. NEW ZEALAND: McKinnon Pass, 29–30.xii.1919, [no collector name] [Holotype 13 (nº 85.708), Paratype 1Ƥ (nº 85711) AMNZ].

Discussion

The disposition of dorsocentrals 4+ 4 in both sexes, the presence of 4 notopleurals and 2+3 katepisternals in males, and the genital structures of the new species are very distinctive from the other species. The three species can be easily separated especially by the dorsocentral setae. The color pattern does not show a significant difference. All three species show an accentuated dimorphism, where the males are more distinguishable than females.

Figures

FIGURES 12 – 16. Exsul alfredoi sp. n.: 12 — hypandrium; 13 — sternite 5; 14 — cercal plate; 15 — ovipositor, dorsal view; 16 — ovipositor, ventral view.