Key to the subspecies of Megaphyllum projectum

Based on male and female genitalia characters; female of M. p. deubeli not included because it needs further investigation.

1 Male ............................................................................................... 2

- Female.............................................................................................. 4

2 Anterior process of opisthomere rudimentary, shorter than the well-developed posterior process (Fig. 10). Promere triangular, without apical serrated lobe................................................ M. projectum deubeli (Verhoeff, 1899)

- Anterior and posterior processes of opisthomere of approximately the same length and development (Fig. 3). Promere with a serrated apical lobe (by M. p. kochi this serrated lobe sometimes not visible under a standard light microscope, just under stereo microscope, at high magnification).................................................................. 3

3 Promere tapering, the whole gonopod in situ appears to be thin (Figs. 14–15)......... M. projectum kochi (Verhoeff, 1907)

- Promere not tapering, the whole gonopod in situ appears to be stout (Figs. 1, 16).... M. projectum projectum Verhoeff, 1894

4 Ampullas well-developed, dorsal ampulla wide, bulbous, ventral ampulla elongated (Figs. 8 a–c)............................................................................................ M. projectum projectum Verhoeff, 1894

- Ampullas thin, elongated, dorsal ampulla not bulbous M. projectum kochi (Verhoeff, 1907)