Psellonus , Simon 1897

Psellonus Simon, 1897

Psellonus Simon, 1897: 14 (type species: P. planus, by monotypy).

Diagnosis. Psellonus can be distinguished from all other genera of Philodromidae by the flat, frontally truncated prosoma (Figs. 2A, 3A) in combination with a unique eye configuration (both eye rows occupying full width of cephalothorax, MEQ strongly trapezoid, more than 3 times wider than long, AER straight, PER slightly recurved, AER much narrower than PER, PME smaller than other eyes (Figs. 3A, C, 4A) and strongly elongated mouthparts (labium more than 3 times longer than wide, endites elongated, convergent blades (Figs. 2B, 3B). A similar eye configuration is found in Pseudopsellonus Balogh, but labium and endites are not elongated in this genus. Further diagnostic characters are seen in the chelicerae, which show strong bulges in both sexes (Figs. 2C, 3C). In the male, however, the chelicerae are strongly divergent and modified (Fig. 3C).