Chaethippus, Duda, 1930

Riccardi, Paula Raile, 2020, Taxonomic revision of the genus Chaethippus Duda, 1930 (Diptera: Chloropidae) with the description of four species, Zootaxa 4802 (1), pp. 129-140 : 130

Key to the adult species of Chaethippus

1. Hind tibial spur absent ( fig. 15 ); one strong vibrissa ( fig. 16 ).................................................. 2

- Hind tibial spur well developed ( fig. 20 ); one or two vibrissae.................................................. 3

2. Anepisternum with microtrichiae; fore coxa with a row of 4 stout spines anteriorly ( fig. 9 ); femoral organ with four rows of spines ( fig. 12 ).......................................................... Chaethippus carioca sp.nov. [ Brazil]

- Anepisternum bare; fore coxa with 2 stout spines anteriorly; femoral organ with three rows of spines ( fig. 17 )............................................................................. Chaethippus flavus sp.nov. [ French Guiana]

3. Two strong vibrissae ( fig. 2 ); fore coxa with two long setae anteriorly, not spine-like ( fig. 2 , arrow).................................................................................................. Chaethippus mellinus [ Peru]

- One strong vibrissa; other combination.................................................................... 4

4. Two pairs of prescutellar setae between the dorsocentrals; scutal stripes orangish; anepisternum with a black spot ( fig. 20 ); fore coxa with three black long setae anteriorly.................................. Chaethippus maculatus sp.nov. [ Brazil]

- One pair of prescutellar seta between the dorsocentrals; scutal stripes partially brown ( fig. 26 ); anepisternum yellow; fore coxa with pale pilosity........................................................ Chaethippus notatus sp.nov. [ Brazil]

Figures

FIGURES 15–19. Chaethippus flavus sp.nov. holotype. 15, habitus (scale bar 1 mm). 16, head in dorsal view. 17, femoral organ. 18, male terminalia in ventral view. 19, male terminalia in terminal view (scale bar 0.1 mm). Abbreviations: bas, basiphallus; cer, cercus; dis, distiphallus; ep, epandrium; gon, gonite; st 6, remnant of the 6th sternite.

FIGURES 20–24. Chaethippus maculatus sp.nov. holotype. 20, habitus (scale bar 1 mm). 21, head in dorsal view. 22, abdome ventral (scale bar 0.1 mm). 23, female terminalia, dorsal. 24, female terminalia, ventral. Abbreviations: cer, cercus; epi, epiproct; hypo, hypoproct.

FIGURES 7–14. Chaethippus carioca sp.nov. paratypes. 7, habitus (scale bar 1 mm). 8, head in dorsal view. 9, head and thorax in profile (arrow indicates the fore coxa strong setae). 10, detail of the head in dorsal view. 11, tibial organ. 12, femoral organ. 13–14, male terminalia in terminal view (scale bar 0.1 mm). Abbreviations: bas, basiphallus; cer, cercus; dis, distiphallus; ep, epandrium; fr, frons; oc tr, ocellar triangle.

FIGURES 1–6. Chaethippus mellinus. 1, habitus (scale bar 1 mm). 2, head in frontal view (arrow points to the strong seta on the fore coxa). 3, wing. 4, head and thorax in dorsal view. 5, epandrium in terminal view. 6, male terminalia in ventral view (scale bar 0.1 mm). Abbreviations: bas, basiphallus; cer, cercus; dis, distiphallus; ep, epandrium; gon, gonites; hyp, hypandrium; phal, phallapodeme; phal s, phallapodemic sclerite; st 6, remnant of the 6th sternite.

FIGURES 25–29. Chaethippus notatus sp.nov. holotype. 25, habitus (scale bar 1 mm). 26, head and thorax in dorsal view. 27, femoral organ. 28, male terminalia terminal (scale bar 0.1 mm). 29, male terminalia ventral. Abbreviations: bas, basiphallus; cer, cercus; dis, distiphallus; ep, epandrium; gon, gonites; hyp, hypandrium; phal, phallapodeme; phal s, phallapodemic sclerite.