Paracloeodes

Cruz, Paulo Vilela, Usher, Andrew K. & Jacobus, Luke M., 2017, Review of continental North and Central American Paracloeodes Day 1955 (Ephemeroptera: Baetidae), including description of a new species from Minnesota, U. S. A., Zootaxa 4263 (2), pp. 333-346 : 344

Key for the North American nymphs of Paracloeodes

1. Apical half of glossa with an abrupt decrease in width (subtriangular condition) ( Figs. 20 and 23 ); anterior surface of forefemur with small blunt setae near dorsal margin ( Fig. 35 ); outer incisor of right mandible with one vestigial denticle (1 vestigial denticle + 3 denticles of usual size) ( Fig. 32 ); only known distribution: Minnesota ............................ P. lotor n. sp.

1’. Apical half of glossa without an abrupt decrease in width (rounded condition) ( Figs. 21, 22, 24, 25 ); anterior surface of forefemur with longer blunt setae near dorsal margin ( Figs. 14, 15 and 16 ); outer incisor of right mandible without vestigial denticle (4 denticles of usual size); known geographical range: widespread, including Minnesota .............................2

2. Medial row of blunt setae on femora absent ( Fig. 15 ); anterior surface of forefemur without row of blunt setae near ventral margin ( Fig. 15 ); known geographical range: Mexico.................................................... P. lugoi

2’. Medial row of blunt setae on femora present ( Figs. 14 and 16 ); anterior surface of forefemur with row of blunt setae, or with scattered blunt setae near ventral margin ( Figs. 14 and 16 ); known geographical range: widespread, including Mexico...... 3

3. Anterior surface of forefemur with three dense rows of robust blunt setae ( Fig. 16 ); length of fore claw less than half of length of tarsus ( Fig. 16 ); known geographical range: widespread, including southeastern USA...................... P. minutus

3’. Anterior surface of forefemur with three sparse rows of robust blunt setae ( Fig. 14 ); length of fore claw equal or longer than half of length of tarsus ( Fig. 14 ); known geographical range: southeastern USA.............................. P. fleeki

Figures

FIGURES 17 – 25. 17. Paracloeodes fleeki, shape of segment II and III of labial palp (paratype); 18. Paracloeodes lugoi, shape of segment II and III of labial palp (holotype), red lines demonstrate how ratios were measured; 19. Paracloeodes minutus, shape of segment II and III of labial palp (paratype of P. abditus); 20. Paracloeodes lotor n. sp., photograph, subtriangular shape of glossa and paraglossa (holotype); 21. Paracloeodes lugoi, photograph, intermediary degree of roundness on glossa and paraglossa; 22. Paracloeodes minutus, photograph, subcircular or rounded shape of glossa and paraglossa (P. abditus paratype); 23. Paracloeodes lotor n. sp., line drawing, subtriangular shape of glossa and paraglossa; 24. Paracloeodes lugoi, line drawing, intermediary degree of roundness on glossa and paraglossa; 25. Paracloeodes minutus, line drawing, subcircular or rounded shape of glossa and paraglossa (P. abditus paratype).

FIGURES 35 – 41. Paracloeodes lotor n. sp. 35. foreleg; 36. shape of setae on dorsal margin of forefemur; 37. detail of foreclaw; 38. spines on posterior margin of abdominal terga; 39. gill IV; 40. cercus; 41. terminal filament.

FIGURES 30 – 34. Paracloeodes lotor n. sp. 30. labrum (left v. v., right d. v.); 31. left mandible; 32. right mandible; 33. maxilla; 34. labium (left d. v., right v. v.).

FIGURES 14 – 16. Forelegs of nymphs. 14. Paracloeodes fleeki (paratype), red lines demonstrate how ratios were measured, regular arrow indicates the ventral row of setae of femur, bracket indicates the row of blunt setae near ventral margin, dashed line rectangle indicates the medial row of setae on anterior surface of forefemur, dashed line ellipse indicates the row of blunt setae near dorsal margin, the dashed line arrow indicates the dorsal row of setae on femur; 15. Paracloeodes lugoi (holotype); 16. Paracloeodes minutus (paratype of P. abditus).