Erasmoneura bipentagona ( Beamer, 1927 )

Dmitriev, D. A., 2008, New and little known species of Erasmoneura Young (Hemiptera: Cicadellidae: Typhlocybinae), Zootaxa 1851 (1), pp. 65-68 : 65-66

Erasmoneura bipentagona ( Beamer, 1927)

( Figs. 1 , 3 )

Erythroneura bipentagona Beamer, 1927: 31

Erythroneura (Erasmoneura) bipentagona Young, 1952: 81

Erasmoneura bipentagona Dietrich & Dmitriev, 2006: 140

Description: Body size (male, female): 2.4–2.8 mm.

Coloration (male, female): Dorsum yellow or white, with reddish and brownish color pattern. Vertex unicolorous or with orange parallel submedial lines with lateral branch, midline pale. Anteclypeus pale, concolorous with rest of face. Pronotum almost entirely dark; mesonotum pale, with dark lateral triangles. Thoracic venter with dark mesosternum, remainder pale. Forewings mainly dark with pale lateral specks and two big diamond or pentagonal spots at middle; dark spot on costal margin; apical cell II with distal spot; inner apical cell without brown spot.

Abdomen (male): 2S abdominal apodemes large, broad, reaching 3S posterior margin.

Genitalia (male): Pygofer lobe rounded; dorsal appendage with distinct basal suture, but not movably articulated, simple, not extended beyond pygofer apex, curved upward in lateral view. Style apex three pointed ( Fig. 1c ); second point very short, tooth like; third point elongate, longer than half distance between other two points, angle between basal and third points about 90°. Aedeagus with preatrium longer than shaft; shaft straight and broad in lateral view, depressed in crossection, with ventral processes placed basally, well separated from shaft, longer than shaft, parallel to each other on ventral side of aedeagus; distal processes short toothlike, apical.

Type locality: Holotype ♀, USA, Kansas, Douglas Co., (Beamer), ( KSEM).

Studied material: CANADA, 1 ♀, Manitoba, Dauphin Lake , 3 IV 1919 (Hippisley) . 1 ♀, Saskatchewan, Elbow, 10 VI 1980 (Brooks). USA, 2 ♂, 1 ♀, 1 nymph, North Dakota, Golden Valley Co., Sentinel Butte, 4 VIII 1985 (Hamilton) . 6 ♂, 11 ♀, North Dakota, Morton Co., 11 km E Judson , 4 VIII 1985 (Hamilton), ( CNC) ; 1 ♂, 1 ♀, same data, ( INHS) .

Host plant: Unknown.

Note: E. bipentagona (Beamer) was described based on a single female specimen from Kansas ( USA). Beamer (1927) originally placed the species in the E. scutelleris Gillette species group, a group of superficially similar but unrelated species, recognized by Robinson (1926) but not subsequent workers ( Beamer, 1938, 1946). The species was omitted from Beamer’s revision of the species of the genus Erythroneura ( Beamer, 1930, 1931a, 1931b, 1931c, 1931d, 1932a, 1932b, 1932c, 1932d, 1932e, 1932f, 1938, 1946) and later was placed in the subgenus Erythroneura (Erasmoneura) by Young (1952). Additional specimens (males and females) from Canada, were found in CNC. Based on the shape of the female sternite VII, male genitalia and coloration, this species is similar to Erasmoneura margaritae Dmitriev & Dietrich, 2007 , from which it differs in the shape of the aedeagus having both ventral and distal processes (only distal in E. margaritae Dmitriev & Dietrich ) and two characteristic diamond or pentagonal pale spots along the midline of the back, from which the species’ name is derived.

Figures

FIGURE 1. Erasmoneura bipentagona (Beamer): a, habitus; b, pygofer lobe, lateral view; c, style apex; d; aedeagus, lateral view; e, aedeagus, ventral view.

FIGURE 3. Map of North America. Distribution of Erasmoneura bipentagona (Beamer) and E. latiloba sp. n.