Aethodelphax concavus (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 : 57-59

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

( Fig. 5 )

Delphacodes concava Beamer, 1948b: 113 , 117.

Type locality. USA: Florida, Leon Co., Woodville.

Diagnosis. Color. Body tan, darker on pleural regions and broadly darker on abdomen; pygofer pale, diffusely darker laterally; parameres and processes of segment 10 dark brown.

Structure. Length male brachypter (n=1) 1.98, width 0.60; female not observed. Head just narrower than prothorax, ratio vertex L:W (n=1) 1.40. Calcar bearing (n=3) 17–20 black teeth. Genitalia with pygofer opening about as wide as tall ( Fig. 5 D), lateral margins carinate; diaphragm well developed, medially narrowed, armature of the diaphragm well-developed, dorsocaudally projecting, in caudal view about as tall as wide, broadening dorsally to cordate apex. Parameres ( Fig. 5 E) pediform, outer angle short and rounded, inner angle elongate, blunt, dorsum of parameres slightly sinuate, angled dorsomedially from caudal view; basal angle slightly projecting. Aedeagus ( Fig. 5 F) broad near base, bent upward near base, narrowing and slightly curved distally to rounded ventrally curved apex (providing a concave appearance to the aedeagus venter from lateral view); apical third of aedeagus with a fine ventral row of teeth and a fine dorsal row of teeth that continue diagonally across the right of shaft, and a subdorsal row beginning in apical third of shaft; gonopore in apical third, on right side. Aedeagal suspensorium, encircling aedeagus, narrow between aedeagus and segment 10. Segment 10 broad in lateral view, bearing pair of short straight ventrally directed processes on ventrocaudal margin, about 1.5x as long as wide at base.

Remarks. The single pair of straight processes on segment 10, and the tapering, ventrally concave aedeagus separates this species from all others in the genus. The most similar species might be A. paraparvulus , which differs most obviously by having a second pair of processes on segment 10. All observed specimens were brachypterous.

Reported hosts. None.

Distribution. USA: FL, TN.

Material observed. PARATYPES: USA: Florida: [Seminole Co.,] Sanford, 10–7–[19]’25, E. D. Ball (1m, USNM), same, 7–22–[19]26 (1m, USNM); [Leon Co.,]; Woodville, 3–7–1947 (1m, 1f, AMNH).

Other material observed: USA: Florida: Long Pine Key, Everglades N.P., 24 Dec. 1951, GL 334, Rich & Stannard (2m, CNCI); Tennessee [Wayne Co.,] Waynesboro, 8–4–1948, H. W. Crowder (1m, SEMC).

Figures

FIGURE 5. Aethodelphax concavus (paratype Sanford, FL; 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.