Gracilidia

Nielson, M. W., 2011, 2953, Zootaxa 2953, pp. 1-85 : 23

Key to species of Gracilidia (males)

1. Pygofer in lateral view with long, very slender, membranous caudoventral process................................. 2

- Pygofer in lateral view with very small (sometimes undetectable) membranous caudoventral lobe...................... 5

2. Aedeagus in lateral view with prominent subapical lobe; pygofer in lateral view with long caudoventral process.......... 3

- Aedeagus in lateral view without such lobe; pygofer in lateral view with short caudoventral process not reaching base of caudodorsal process...................................................................................... 4

3. Subgenital plate with prominent subapical lobe on outer lateral margin ( Fig. 122); pygofer in lateral view without membranous lobe between caudodorsal and caudoventral processes ( Fig. 121)..................... Colombia) G. uniflangata , sp. nov.

- Subgenital plate without such lobe, at most slightly inflated ( Fig. 115); pygofer in lateral view with small, digitate lobe between caudodorsal and caudoventral processes ( Fig. 114)......................... ( Colombia) G. biflangata , sp. nov.

4. Large species, more than 7 mm in length; pygofer in lateral view with small, digitate membranous lobe between caudodorsal and caudoventral processes.............................................................................. 5

- Small species, under 7 mm in length; pygofer in lateral view with long, subtriangulate membranous lobe between caudodorsal and caudoventral processes ( Fig. 107).............................................( Colombia) G. minuta , sp. nov.

5. Pygofer with very small caudoventral process, sometimes not detectable......................................... 6

- Pygofer with very long membranous caudoventral process..................................................... 7

6. Pygofer with long, elliptical, membranous caudal lobe below caudodorsal lobe ( Fig. 135); aedeagus with heavily sclerotized, apical spine ( Fig. 139); subgenital plate with setae on outer margins ( Fig. 136).......... Colombia) G. membrana , sp. nov.

- Pygofer with short elliptical membranous caudal lobe below caudodorsal lobe (Nielson:1986, Fig. 15)); aedeagus with membranous apical spine ( Nielson 1986, Fig. 11); subgenital plate with setae on surface and margins ( Nielson 1986: Fig. 10).................................................................................. ( Ecuador) G. gracilis Nielson

7. Aedeagal shaft in lateral view with dorsal subapical inflation, apical spine narrow ( Fig. 146)..................................................................................................... Colombia) G. tubercula , sp. nov.

- Aedeagal shaft in lateral view very narrow throughout, apical spine robust ( Fig. 132)... ( Colombia) G. longiuscula , sp. nov.