Polyplectropus spiculifer, Chamorro & Holzenthal, 2010

Chamorro, Maria Lourdes & Holzenthal, Ralph W., 2010, 2582, Zootaxa 2582, pp. 1-252 : 191

Key to males of P. santiago species group

1 Dorsolateral process of preanal appendage absent, only short bulbous structure with dorsal microsetae present ( Fig. 80)................................................................................ 2

- Short dorsolateral process of preanal appendage present, small remnant basal bulbous structure also visible ( Fig. 93).......................................................... P. spiculifer , n. sp., p. 183

2(1) Intermediate appendage with a single process ( Figs. 72, 77)...................................... 4

- Intermediate appendage with multiple processes (more than 1) ( Figs. 84, 94)......................... 3

3(2) Intermediate appendage with 3 processes of roughly equal size ( Fig. 84); phallus dorsally unmodified....................................................................... P. flavicornis Ulmer , p. 166

- Intermediate appendage with 2 processes of unequal size; phallus with paired, anteriorly directed dorsal projections ( Fig. 94)............................................. P. squalus Bueno-Soria , p. 185

4(2) Dorsal branch of inferior appendage highly curved, narrow and elongate, base slightly enlarged ( Fig. 73) … 5

- Dorsal branch of inferior appendage not highly curved, clavate ( Fig. 72)............................ 8

5(4) Intermediate appendage apically highly sclerotized ( Fig. 80)..................................... 6

- Intermediate appendage apically lightly sclerotized (apex may not be easily visible) ( Fig. 78)........................................................................... P. brborichorum , n. sp., p. 157

6(5) Endothecal phallic spines absent ( Fig. 73)..................................................... 7

- Endothecal phallic spines present ( Fig. 75).............................. P. bolivianus , n. sp., p. 151

7(6) Dorsal branch of inferior appendage short and basally slightly produced anterad; intermediate appendage gradually narrowing apically ( Fig. 73).................................. P. andinensis , n. sp., p. 148

- Dorsal branch of inferior appendage elongate and basally produced anterad to almost half of sternum IX; intermediate appendage rapidly narrowing apically ( Fig. 91).............. P. robacki (Yamamoto) , p. 180

8(4) Intermediate appendage highly sclerotized ( Figs. 72, 89); dorsolateral arm of dorsal phallic sclerite slightly produced beyond apex or not............................................................. 11

- Intermediate appendage membranous; dorsolateral arm of dorsal phallic sclerite greatly produced beyond apex