Empoasca bartletti, Southern, 2008

Southern, Phillip Sterling, 2008, New species and color forms of Empoasca (Hemiptera: Cicadellidae: Typhlocybinae: Empoascini) from South America, Zootaxa 1949 (1), pp. 51-62 : 52-53

publication ID

https://doi.org/ 10.11646/zootaxa.1949.1.4



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scientific name

Empoasca bartletti

n. sp.

Empoasca bartletti n. sp.

( Figs. 1a View FIGURE 1 , 2 View FIGURE 2 )

Body (male): Length: 3.6 mm; crown length: 0.28–0.29 mm; crown projection: 0.13 mm; crown projection ratio: 0.45–0.46; head length (including eyes): 0.65–0.66 mm; interoccular width: 0.48–0.49 mm; head width (including eyes): 1.00– 1.04 mm; face length: 1.25 mm; interantennal width: 0.49–0.50 mm; pronotum width: 0.90–0.95 mm; pronotum length: 0.50–0.55 mm; hind tibia length: 1.80–1.85 mm; hind tarsus length: 0.50– 0.59 mm; hind tarsomere I length: 0.33–0.40 mm; hind tarsomere I/hind tarsus ratio: 0.66–0.68. Crown ( Fig. 1a View FIGURE 1 ) yellow to yellow-green with darker green spots just laterad of midline on anterior margin. Coronal suture distinct, reaching or nearly reaching anterior margin. Face yellow-green without distinctive markings but more yellow on central portion of upper face; frontal sutures end just below ocelli which are on crown/face margin, slightly nearer eye than mid-line. Pronotum opaque along anterior margin, yellow-green at midline, green laterally; elsewhere subhyaline. Scutellum yellow-green with thin paler lines just laterad of midline. Forewing faintly striped with yellow-gold and green in basal 2/3; apical veins R 2 and RM confluent basally (apical cell 2 triangular, petiolate), arising from cell R. Hind wing similar to that of Empoasca fabae (Harris) .

Pygofer in lateral view with rounded apex ( Fig. 2a View FIGURE 2 ); 8–11 macrosetae along posterior margin at and below apex and 5–7 macrosetae in posterodorsal – anteroventral line on inner face; filamentous setae on outer face near dorsal margin; 8–10 setae (slightly less stout than those at posterior margin) in diagonal line just above base of plate; spicules on inner and outer face of pygofer. Plate in lateral aspect apically curving gradually dorsad and tapering to rounded apex ( Fig. 2a View FIGURE 2 ); A-group setae absent; B-group setae (29–30) uniseriate, continuing basally into usual location of A-group setae, slightly more closely spaced apically; C-group setae (19– 23) generally biseriate basally, thence uniseriate, gradually declining in length to shortest at apex; D-group setae (32–34) roughly biseriate. Style short, body beyond connective less than 1/2 length of pygofer process; in ventral view ( Fig. 2g View FIGURE 2 ) with sharp lateral bend near base, thence bowed strongly mediad, dentifer slightly recurved, not strongly demarked from body; teeth (5–7) ridge-like; setae (10–11) on ventro/lateral surface in basal half of style; apex truncate at slight angle in some aspects. Pygofer process in lateral aspect ( Figs. 2a, h View FIGURE 2 ) with obvious basal brace directed dorsad, nearly reaching sclerotized extension of dorsal structure; long, extending beyond pygofer to near apex of plate; curved upward from near base, thence relatively straight to apical portion slightly decurved; thin, relatively parallel-margined to slight ventromedial expansion at apical 1/4, thence gradually tapered to sharp apex. In ventral view ( Figs. 2b, i View FIGURE 2 ), thin, directed caudad, abruptly bowed slightly laterad in apical 1/4, apex sharp; medial surface bearing aculeae from near base to near point at which process bows laterad. Anal hook in lateral view ( Fig. 2a View FIGURE 2 ), a long unbranched process over 3/4 depth of pygofer, reaching nearly to dorsal margin of plate; thin throughout, tapering very gradually to sharp apex, slightly sinuate; in caudoventral view ( Fig. 2d View FIGURE 2 ), apical half curved strongly mediad. Aedeagus in lateral aspect ( Fig. 2c View FIGURE 2 1 View FIGURE 1 , c 2 View FIGURE 2 ) with preatrium broadest at base, tapered slightly distad, sinuate (bowed first caudad then cephalad); pair of processes arising from atrium near base of shaft appear at their bases to wrap collarlike around anterior side of atrium – but they actually do not, each process bifurcated at about midlength with ventral process shorter (1/4 to ½ length of more dorsal process); shaft relatively thin and parallel margined through most of length, curved dorsad in apical half, apex rounded. In caudoventral aspect ( Fig. 2d View FIGURE 2 ), preatrium broadened abruptly to wide atrium (atrium 3X or more average width of preatrium); processes appear to arise from side of atrium, directed laterad at base, thence dorsocaudad, ventral ramus directed caudad, dorsal ramus curved mediad in apical half; shaft parallel-margined, slightly broader than average width of preatrium, rounded at apex; gonopore terminal or just ventrad of terminus. Connective ( Fig. 2e View FIGURE 2 ) slightly longer than broad; anterior margin heavily sclerotized; well defined dorsal keel on midline which in lateral view is much deeper apically than basally (wedge-shaped); lateral margins obscure. Dorsum of genital capsule ( Fig. 2k View FIGURE 2 ) with anterior margin sclerotized; no obvious bridge; transverse bar sclerotized laterally but obscure near midline; horns very weakly differentiated but appear as lightly sclerotized triangles well separated basally.

First sternal complex ( Fig. 2m View FIGURE 2 ) with well sclerotized sternal bar; dorsal apodemes reduced to low tubercles which bend sharply caudad; lateral apodemes well separated at midline. Second sternal apodemes ( Fig. 2n View FIGURE 2 ) broad (0.54–0.58 mm) and long (0.68–0.71 mm, reaching 6.0); apices relatively square, extended caudad slightly more on medial side; not widely separated medially through most of length. Third sternal complex a cradle in which lie second sternal apodemes; small triangular apodemes just laterad of outer margins of second apodemes directed dorsad. Second tergal apodeme a very low wall continuing across midline with slight expansion ventrad at lateral ends. Third tergal apodeme ( Fig. 2q View FIGURE 2 ) a very low wall reduced medially, not crossing midline, a distinct ventral projection—a rounded triangle—near lateral end of apodeme. Abdominal sternum VIII with posterior margin broadly and deeply concave.

Holotype male: ECUADOR: Provincia de / Francisco de Orellana / Yasuni National Park / S00° 40.478 W76° 23.866 // 27.IV.2005, CRBartlett / N Nazdrowicz, D Chang / ex: Sweeping / Night // PSS RESEARCH/ 07-316-2 // GoogleMaps HOLOTYPE / Empoasca bartletti n. sp. / P.S. Southern 2008 ( NCSU) . Paratype: 1 male, same collection data as holotype ( UDEL) .

This specific name, bartletti , is a masculine noun in the genitive case. The species is named in honor of the collector, Dr. Charles Bartlett, who provided the specimens for study.

Of New World species of Empoasca , only E. tepona DeLong and Guevara (1954) has a bifurcate aedeagal process. However, E. tepona does not have the aedegal processes massive and bowed well away from the shaft in ventral view; the shaft in lateral view is angled upward from the base, not directed caudad for at least half its length; the styles are not very short as in E. bartletti . The external coloration of E. tepona as described differs greatly from that of E. bartletti , and E. tepona is smaller (3.0 mm vs. 3.6 mm). In the key to Empoasca of eastern Peru ( Southern, 1982), E. bartletti keys to couplet 31 and E. norcasta . E. bartletti differs from that species in several aspects, including: bifurcate aedeagal processes, apex of style not bent abruptly laterad, and pygofer process bearing aculeae.


North Carolina State University Insect Museum


University of Delaware