Geoplana Schultze & Muller 1857

IDENTIFICATION KEY TO SPECIES OF GEOPLANA

1. Dorsal median black band............................................................................................ Geoplana vaginuloides Dorsal median band with another colour........................................................................................................2

2. Dorsal median grey band................................................................................................... Geoplana pulchella Dorsal median yellow-orange or reddish band................................................................................................3

3. Dorsal median band bounded on either side by a thin whitish stripe.................................... Geoplana mogi Dorsal median band bounded on either side by a black stripe......................................................................4

4. Additional pair of fine paramedian greenish-yellow stripes.................................................. Geoplana apua Additional pair of fine paramedian whitish stripes........................................................................................5

5. Dorsum sprinkled with whitish specks...........................................................................................................6 Dorsum not sprinkled with whitish specks.....................................................................................................8

6. White mottling only on the lateral-most stripes.............................................................................................7 Entire dorsum sprinkled with conspicuous whitish specks...........................................................................9

7. Outermost zone fades from black to grey towards its external margin.......................................................10 Outermost zone divided into an internal black line and a grey band.........................................................11

8. Outermost zone white, also continuous with white body margins.................................. Geoplana iporanga Outermost zone black, bounded by white body margins..............................................................................12

9. Diameter of muscular cylinder around ejaculatory duct equivalent to 1.5 times the diameter of this duct.............................................................................................................................................. Geoplana boraceia Diameter of muscular cylinder around ejaculatory duct equivalent to ten times the diameter of this duct.................................................................................................................................................... Geoplana chita

10. Penis papilla cylindrical and blunt, with stroma with necks of glands characteristically gathered in bundles that resemble an orange in cross-section.................................................................. Geoplana cananeia Penis papilla pointed................................................................................................ Geoplana caraguatatuba

11. Longitudinal parenchymal muscle fibres disposed around intestine as a loose muscular cylinder............................................................................................................................................. Geoplana cambara Supraintestinal and subintestinal parenchymal muscle layers constituted of mixed transverse and longitudinal fibres............................................................................................................. Geoplana paranapiacaba

12. Penis papilla with dorsal insertion strongly displaced anteriorly and very ventrally....... Geoplana ibiuna Dorsal and ventral insertions of penis papilla at the same transverse plane............ Geoplana piratininga