Pazius

Ascuntar-Osnas, Oscar, Domínguez, Diana Torres, Ulloa, Patricia Chacón De & Machado, Renato Jose Pires, 2016, First record of the order Mecoptera (Insecta) for the Gorgona Island (Colombia), with the description of a new species, Zootaxa 4097 (2), pp. 271-279 : 277-278

Identification key for males of Pazius spp.

(Adapted from Byers, 1977)

1 Aedeagus with a bifurcated ventral projection basally ( Fig. 5 : A, E and G) “ furcatus group ”.......................... 2

- Aedeagus without a bifurcated ventral projection basally ( Figs. 6 A, B and 7A, C)................................. 5

2 Aedeagus with a ventral process over the bifurcated projection ( Figs. 5 A, C)..................................... 3

- Aedeagus without a ventral process over the bifurcated projection ( Figs. 5 E, G).................................... 4

3 Epandrial appendix in dorsal view with large spines posteriorly ( Fig. 5 D, arrow) ( Brazil)................. P. ornaticaudus

- Epandrial appendix in dorsal view without large spines posteriorly, ventral process as in Fig. 5 B ( Brazil, Colombia).................................................................................................. .. P. cinctipes

4 Ventral process of the epandrial appendix bifurcated and placed around the longitudinal middle of the lobe in dorsal view; branches with different lengths ( Fig. 5 F) ( Panama)..................................................... P. flinti

- Ventral process of the epandrial appendix bifurcated and placed on the posterior margin of the lobe in dorsal view; branches with similar lengths ( Fig. 5 H) ( Venezuela)........................................................ P. furcatus

5 Epandrial appendix in lateral view not convex ( Fig. 6 A, B) “ gracilis group ”...................................... 6

- Epandrial appendix in lateral view convex ( Fig. 4 A, 7A, C) “ obtusus group ”...................................... 7

6 Epandrial appendix in lateral view with acute apex and directed upwards ( Fig. 6 A) ( Peru)..................... P. gracilis

- Epandrial appendix in lateral view without apex directed upwards ( Fig. 6 B), in dorsal view with wide and black spines on the mesal surface ( Fig. 6 C) ( Ecuador).............................................................. P. pectinatus

7 Epandrial appendix with short spines on the dorsal margin ( Figs. 4 A, 7C)......................................... 8

- Epandrial appendix without short spines on the dorsal margin, with ventral process as in Fig. 7 B ( Panama, Costa Rica)................................................................................................. ... P. obtusus

8 Epandrial lobe ventral margin with a medial projection, basistylus hexagon-shaped ( Fig. 4 A); ventral process as in Fig. 4 C; short branch with spine truncated ( Fig. 4 C) ( Colombia)...................................... P. gorgonensis n. sp.

- Epandrial lobe ventral margin without a medial projection, basistylus squared-shaped ( Fig. 7 C); ventral process as in Fig. 7 D; short branch with spine long and acute ( Panama).................................................... P. spinosus

Figures

FIGURE 4. Pazius gorgonensis n. sp., abdomen terminal segments. A) Lateral view. B) Posteral view. C) Dorsal view. D) Aedeagus. Abbreviations, T: Tergite; S: Sternite VIII. Arrows indicate the short spines on the dorsal margin and the medial proccess on the ventral margin of tergite IX. on sternite IX arrow indicates the sclerotized process.

FIGURE 5. Pazius spp. Lateral view of the furcatus group terminal segments and details of the aedeagus ventral bifurcated process in dorsal view: A) P. cinctipes. C) P. ornaticaudus. E) P. flinti. G) P. furcatus. B) P. cinctipes, dorsal view of the epandrial lobe. D) P. ornaticaudus posterior view of sternite IX (arrow indicates spines in the epandrial appendix). Sternite IX in dorsal view: F) P. flinti. H) P. furcatus. Images modified from Byers (1957, 1977), Penny (1977) and Byers & Flórez (1995).

FIGURE 6. Pazius spp. Lateral view of gracilis group terminal segments: A) P. gracilis. B) P. pectinatus. C) P. pectinatus tergite IX in dorsal view. Images modified from Byers (1957).

FIGURE 7. Pazius spp. Lateral view of the terminal segments and dorsal view of the obtusus group tergite IX: A, B) P. obtusus. C, D) P. spinosus. Dashed line indicates convex shape of tergite IX. Images modified from Byers (1957) and Byers & Roggero (1992).