Aethodelphax

Bartlett, Charles R., 2011, Aethodelphax prairianus gen. et sp. nov. (Hemiptera: Delphacidae) and seven congeneric species from North American Delphacodes, Zootaxa 2837, pp. 48-66 : 51

Key to species of Aethodelphax (males)

1. Segment 10 in lateral view with pair of short ventral processes (or large teeth) near midpoint in addition to distal paired processes ( Figs. 3 H, 7G, 8H)............................................................................... 2

1’ Segment 10 in lateral view lacking a pair of ventral processes near midline (distal paired processes present)............. 4

2. Aedeagus straight or slightly sinuate in lateral view with a lateral flange on one or both sides ( Figs. 3 F–H, 8F–H); outer angle of parameres acute or acuminate; segment 10 with midventral processes ventrally directed........................... 3

2’ Aedeagus curved ventrad in lateral view, large flange lacking ( Figs. 7 F–G); outer angle of parameres rounded; segment 10 with midventral processes lateroventrally directed; MS............................ paraparvulus (Beamer) , comb. nov.

3. Aedeagus with subapical, dorsal tooth ( Figs. 8 F–H), lateral expansion of aedeagus without large acuminate tooth; apices of outer angles of parameres acute; FL, GA, LA...................................... sagittatus (Beamer) , comb. nov.

3’ Aedeagus without subapical, dorsal tooth ( Figs. 3 F–H), with large, acuminate flange on left side; apices of outer angles or parameres acuminate; FL......................................................... alatus (Beamer) , comb. nov.

4. Aedeagus strongly curved ventrad ( Figs. 2 F–G); genital diaphragm bearing pair of subdorsal pegs, one on either side of aedeagus in repose; diaphragm armature not dorsally projecting; FL, LA, MS, TX.......... aetocephalus (Beamer) , comb. nov.

4’ Aedeagus not strongly curved ventrad (aedeagus may be ventrally concave); genital diaphragm lacking subdorsal pegs, diaphragm armature dorsally projecting...................................................................... 5

5. Segment 10 in lateral view robust with small ventral excavation at base of distal paired processes ( Figs. 4 G, 5G).......... 6

5’ Segment 10 in lateral view dorsoventrally flattened, with broadly rounded excavation at base of distal paired processes ( Figs. 1 H, 6H)............................................................................................. 7

6. Aedeagus broadly flattened laterally bearing symmetrical teeth ( Figs. 4 F–G); genital diaphragm armature weakly projecting dorsally; AZ, Mexico.......................................................... caninus (Beamer) , comb. nov.

6’ Aedeagus tubular, not flattened laterally, lacking preapical ventral teeth; diaphragm armature dorsally projecting, taller than wide; FL, TN................................................................ concavus (Beamer) , comb. nov.

7. Aedeagus with large dorsal concavity near midlength ( Figs. 1 F–H), subtended proximally by dorsal pectinate structure; aedeagal suspensorium strongly reflexed at midlength ( Fig. 1 H); Manitoba and MI to NE................. prairianus sp. nov.

7’ Aedeagus lacking large dorsal concavity and pectinate ( Figs. 6 F–H); aedeagal suspensorium straight; KS, MN,WI.................................................................................. megadontus (Beamer) , comb. nov.

Figures

FIGURE 1. Aethodelphax prairianus sp. nov. (paratype, Peoria co., IL., scale = 0.5 mm (A – C), 0.2 mm (D, H )). A. dorsal view; B. frons; C. lateral view; D. pygofer, caudal view; E. left paramere, widest view; F. aedeagus, left lateral view, distal apex at top; G. aedeagus, ventral view, apex at top; H. pygofer, lateral view.

FIGURE 2. Aethodelphax aetocephalus (paratype Slidell, LA; scale = 0.5 mm (A – C), 0.2 mm (D, G )). A. dorsal view; B. frons; C. lateral view; D. pygofer, caudal view; E. left paramere, widest view; F. aedeagus; G. pygofer, lateral view.

FIGURE 3. Aethodelphax alatus (San Mateo, FL; scale = 0.5 mm (A – C), 0.2 mm (D, H )). A. dorsal view; B. frons; C. lateral view; D. pygofer, caudal view; E. left paramere, widest view; F. aedeagus, left lateral view, distal apex at top; G. aedeagus, ventral view, apex at top; H. pygofer, lateral view.

FIGURE 4. Aethodelphax caninus (Santa Rita Mtns., AZ; scale = 0.5 mm (A – C), 0.2 mm (D, G )). A. dorsal view; B. frons; C. lateral view; D. pygofer, caudal view; E. left paramere, widest view; F. aedeagus; G. pygofer, lateral view.

FIGURE 6. Aethodelphax megadontus (paratype Meade Co., KS; scale = 0.5 mm (A – C), 0.2 mm (D, H )). A. dorsal view; B. frons; C. lateral view; D. pygofer, caudal view; E. left paramere, widest view; F. aedeagus, left lateral view, distal apex at top; G. aedeagus, ventral view, apex at top; H. pygofer, lateral view.

FIGURE 7. Aethodelphax paraparvulus (paratype Pearlington, MS; scale = 0.5 mm (A – C), 0.2 mm (D, G )). A. dorsal view; B. frons; C. lateral view; D. pygofer, caudal view; E. left paramere, widest view; F. aedeagus; G. pygofer, lateral view.

FIGURE 8. Aethodelphax sagitattus (Ramsay, LA; scale = 0.5 mm (A – C), 0.2 mm (D, H )). A. dorsal view; B. frons; C. lateral view; D. pygofer, caudal view; E. left paramere, widest view; F. aedeagus, left lateral view, apex at top; G. apex of aedeagus, ventral view; H. pygofer, lateral view.