Key to males of Pazius

Modified from Byers, 1977

1 Aedeagus with forked ventral posterior projection near base ( furcatus group) (Figs. 2 A, 2D, 2G, 2I, 2K)................ 2

1’ Aedeagus without ventral projection near base (Figs. 3, 4, 6).................................................. 6

2 Aedeagus (lateral view) with a backward rectangular protuberance above the fork (Figs. 2 D, 2G)..................... 3

2’ Aedeagus (lateral view) without a backward rectangular protuberance above the fork (Figs. 2 A, 2I, 2K)................ 4

3 Epiandrial lobes with two thick black spines in posterodorsal corner (Fig. 2 G); inner posterior surface with a protuberance (Fig. 2 H"e"); subconical projection from ventral edge terminates in three stout black spines (Fig. 2 H) (Brazil).. ornaticaudus

3’ Epiandrial lobes with one small black spine in posterodorsal corner (Fig. 2 D); inner posterior surface without a protuberance (Fig. 2 E); subconical projection from ventral edge terminates in two stout black spines (Fig. 2 F"c") (Brazil, Colombia).................................................................................................. cinctipes

4 Ventral process of epiandrial lobe (dorsal view) forked, bearing a posterior and an anterior tips, the latter terminating in two blackened denticles (Figs. 2 B, 2C, 2J).................................................................... 5

4’ Ventral process of epiandrial lobe (dorsal view) simple, bearing just an anterior tip terminating in two blackened denticles (Fig. 2 L)......................................................................................... convolutus

5 Ventral bifurcate process of epiandrial lobe (dorsal view) near mid-length of lobe (Fig. 2 B); apex of gonocoxite (lateral view) from truncate to concave (Fig. 2 A); forked projection of aedeagus with compressed branches (Panama).............. flinti

5’ Ventral bifurcate process of epiandrial lobe (dorsal view) distad of mid-length of lobe (Fig. 2 J); apex of gonocoxite (lateral view) conspicuously convex (Fig. 2 I); forked projection of aedeagus with branches of uniform diameter (Venezuela)...................................................................................................... furcatus

6 Epiandrial lobe in lateral view convex (Fig. 3) ( obtusus group)................................................. 7

6’ Epiandrial lobe in lateral view not convex (Figs. 4, 6)....................................................... 9

7 Epiandrial lobe without short spines on the dorsal margin (Fig. 3 A) (Panama, Costa Rica)...................... obtusus

7’ Epiandrial lobe with short spines on the dorsal margin (Figs. 3 C, 3E)............................................ 8

8 Epiandrial lobe ventral margin with a medial projection (Fig. 3 E"b"); gonocoxite hexagon-shaped in lateral view (Fig. 3 E); inner surface of each epiandrial lobe (dorsal view) with a short and truncated subterminal spine (Fig. 3 F"c") (Colombia)................................................................................................ gorgonensis

8’ Epiandrial lobe ventral margin without a medial projection; gonocoxite squared-shaped in lateral view (Fig. 3 C); inner surface of each epiandrial lobe (dorsal view) with a long and acute subterminal spine (Fig. 3 D"a") (Panama)............ spinosus

9 Epiandrial lobes without a group of blackened spines on inner apical surface, and with acute upturned apices (lateral view) (Fig. 4 A) (Peru)................................................................................ .. gracilis

9’ Epiandrial lobes each bearing a group of thick, blackened spines on inner apical surface (Figs. 4 C, 4D, 6C–F) and without acute upturned apices (lateral view) (Figs. 4 B, 6A, 6B) ( pectinatus group)....................................... 10

10 Sternum IX (lateral view) triangular with protruding postero-ventral corner (Fig. 4 B); dorsal margin of epiandrial lobe almost straight (Fig. 4 B); inner surface of epiandrial lobes without projection (Fig. 4 C) (Ecuador)................... pectinatus

10’ Sternum IX (lateral view) semicircular (Fig. 6 A); dorsal margin of epiandrial lobes protruding into a hump (Figs. 6 A, 6B"a"); inner surface of epiandrial lobes with anterio-mesally-directed projection with comb of thick, black spines (Figs 6 D, 6E"d", 6I "d") (Brazil).......................................................................... angairaba sp. nov