Philonthus bicoloristylus Chani-Posse

Aballay, Fernando H., Chani-Posse, Mariana R., Ayón, María Rosana, Maldonado, María Belén & Centeno, Néstor D., 2014, An illustrated key to and diagnoses of the species of Staphylinidae (Coleoptera) associated with decaying carcasses in Argentina, Zootaxa 3860 (2), pp. 101-124 : 117

Philonthus bicoloristylus Chani-Posse

( Figs. 15 , 54, 55 )

Diagnosis (based on Chani-Posse 2010). Philonthus bicoloristylus may be identified by the eyes longer than temples and the bicolored styli of tergum 9. It differs from other southern South American species of Philonthus by the antennal segment 10 quadrate, the pronotum about as long as wide, and the dorsal rows of pronotum each with five punctures. Length 8.0–9.0 mm.

Distribution. Argentina ( Chani-Posse 2010).

Bionomics. Philonthus bicoloristylus has been found to be a common species in horse and cow droppings in northwestern and eastern Argentina ( Chani-Posse 2010).

Figures

FIGURE 13 – 24. Habitus: 13, Philonthus quadraticeps Boheman; 14, P. discoideus (Gravenhorst); 15, P. bicoloristylus Chani- Posse; 16, P. bruchianus Chani-Posse; 17, P. flavolimbatus Erichson; 18, P. bonariensis Bernhauer; 19, P. longicornis Stephens; 20, P. argus Herman; 21, Styngetus viduus (Erichson); 22, Xenopygus analis (Erichson); 23, Nordus elytisi Chatzimanolis; 24, Oligotergus ogloblini Bernhauer.

FIGURE 52 – 59. Head: 52, Philonthus quadraticeps; 53, P. discoideus; 54, P. bicoloristylus. Pronotum: 55, P. bicoloristylus; 56, P. bonariensis; 57, Philonthus quadraticeps. 58, 59. Pronotal hypomeron: 58, Xenopygus analis; 59, Oligotergus ogloblini. Abbreviations: 1 – 5, punctures on dorsal rows of pronotum; Pcp, postcoxal process.