Pectenobunus

Tourinho-Davis, Ana Lúcia, 2004, The third South American species of the genus Pectenobunus Roewer, with a new synonymy for the genus (Opiliones, Eupnoi, Sclerosomatidae, Gagrellinae), Zootaxa 405 (1), pp. 1-16 : 7

Key to species of Pectenobunus

1 Eye mound armed with two rows of four or more spines ( Figs. 3–4 , 7a–9a ), each one tipped with three to four points (fig. 1 in Cokendolpher & Hunt, 1993), abdominal scute with two to three small projections or developed tubercles/processes ( Figs. 7–9 ), body completely brown without spots or having dark spots......................................... 2

­ Eye mound armed with two rows with three to four tubercles ( Fig. 9 ), each one tipped with three to four points, anterior half of abdominal scute with one subtle protuberance ( Fig. 9 ), body yellowish­brown with yellow­opalescent spots and deep pits (fig. 1–2 in Mello­Leitão, 1933) ....................................................................................... P. ruricola

2 Abdominal scute with two to three sharply marked blunt processes ( Figs. 3–4 , 7 ), body uniformly brown never with spots or stripes ( Figs. 1–4 ) ................ P. colliculosus

­ Abdominal scute with two or three small projections or protuberances ( Fig. 8 ), body yellowish­brown, carapace, second prosomatic tergite, abdominal scute and free tergites with black spots (fig. 24 in Ringuelet, 1959) ................................ P. paraguayensis

Figures

FIGURES 1–5. Pectenobunus colliculosus (Roewer). (paratypes SMF RII/346/144). Male: 1, dorsal view; 1a, detail showing the sculpture of the tegument; 3, male, lateral view; 5, right chelicerae showing ventrobasal spine in the detail; Female: 2, dorsal view; 4, lateral view. Scale bars = 1.0 mm for Figs 1–4; = 0.5 mm for Fig 5.

FIGURES 6–9. Fig. 6. P. colliculosus (Roewer). Male (SMF RII/346/144). 6, right pedipalp, lateral view. Scale bar = 1.0 mm. Figs 7–9. Schematic view of Pectenobunus species showing (by the arrows) the armature of the eye mound and the variation in protuberances on the abdominal scute. 7–7a, P. colliculosus; 8–8a, P. paraguayensis; 9–9a, P. ruricola, protuberance indicated by the arrow.