Aethodelphax paraparvulus (Beamer, 1948) Beamer, 1948

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 : 60-61

Aethodelphax paraparvulus (Beamer, 1948) , comb. nov.

( Figs. 7 , 9 B, E)

Delphacodes paraparvula Beamer, 1948b: 112 –113, 117.

Type locality. USA: Mississippi, Hancock Co., Pearlington.

Diagnosis. Color. Body uniformly yellowish-stramineus, parameres and processes on segment 10 darker. Structure. Length male brachypter (n=2) 2.07±0.07, width 0.70±0.04; female brachypter (n=1) length 2.60, width 0.82. Head just narrower than prothorax, ratio vertex L:W (n=3) 1.14±0.09. Calcar bearing 18–25 black teeth (n=2). Genitalia with pygofer opening taller than wide in caudal view ( Fig. 7 D), lateral margins of opening rounded; diaphragm well developed ( Fig. 9 B), median ectal surface projecting caudad; dorsal margin concave, dorsal armature of the diaphragm distinct, quadangular, taller than wide. Parameres ( Fig. 7 E) pediform, outer angle rounded, inner angle elongate, terminally acute, basal angle well developed, blunt, caudally projecting. Aedeagus ( Fig. 7 F) laterally flattened, arched ventrad, narrowing apically, bearing ~8 large, irregularly placed teeth in apical third; gonopore subapical, ventral. Aedeagal suspensorium distinct, encircling aedeagus, quite weak ventrally. Segment 10 bearing pair of short, acuminate processes on ventrocaudal margin, about 2x as long as wide at base, plus second pair of short processes, wider than long, ventrolaterally situated approximately at midlength of segment 10 in lateral view.

Remarks. All observed specimens were brachypterous. This species is most similar to A. aetocephalus , except A. paraparvulus has a second set of processes on segment 10 and the aedeagus is less broad, with relatively few, irregularly distributed teeth. Of the species of Aethodelphax , only A. paraparvulus and A. aetocephalus have a strongly ventrally curved aedeagus.

Reported hosts. None.

Distribution. USA: MS.

Material observed. PARATYPES: USA: Mississippi [Hancock Co.,] Pearlington, 3–3–[1947], R. H. Beamer (3m, 1f, SEMC).

Figures

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 9. Genital diaphragm armature. A. Aethodelphax megadontus, caudal view; B. A. paraparvulus, caudal view; C. A. sagitattus, caudal view; D. A. sagitattus, lateral view (genital diaphragm hatched); E. A. paraparvulus, lateral view.