Agoo dahliana Bahder & Bartlett, 2020

Bahder, Brian W., Bartlett, Charles R., Helmick, Ericka E., Barrantes Barrantes, Edwin A., Zumbado Echavarria, Marco A., Goss, Erica M. & Ascunce, Marina S., 2020, Revised status of Omolicna subgenus Agoo (Hemiptera: Auchenorrhyncha: Fulgoroidea: Derbidae) with a new species from Costa Rica and new country records, Zootaxa 4718 (4), pp. 521-535 : 529-531

Agoo dahliana Bahder & Bartlett sp. n.

( Figures 7–11 )

Type locality. La Selva Biological Station , Heredia, Costa Rica

Diagnosis. Body overall testaceous with darker areas. Orange patches on dorsal portion of clypeus and genae. Dark patch on venter of abdomen and fuscous bands on pronotal foveae. Forewings with many dark spots in cells. Male pygofer with median ventral process wider than long; broad near base, attenuating distally to broadly rounded apex (lateral teeth lacking). Parameres, in lateral view, possess a single, large ventral lobe; dorsal surface bearing large lobe with two weakly sclerotized processes; basal process angled posteriorly; in ventral view parameres possess large, hooked lobes with acute sclerotized apices; paramere apices rounded with distinct, anterior facing, sclerotized spine. Aedeagal apex with two elongate processes on each side, one pair at apex, one pair subapical, in addition to complex endosoma bearing additional processes. Segment X (= “anal tube”) in lateral view robust, caudal portion stout, and ventrally sinuate, apex acute and moderately downcurved; in dorsal view deeply notched in caudal aspect.

Description. Color. General body color yellowish-brown ( Fig. 7 ); face deep orange on dorsal third of clypeus, frons above frontoclypeal suture, and genae below antennae ( Fig. 8A ); lateral carinae of front and vertex darkened. Paranotal folia with dark spots on inner surface. Mesonotum diffusely infuscate with orange, medially pale (giving appearance of weakly contrasted median vitta); lateral-most portion of mesonotum and tegulae pale. Forewings faintly yellowish, veins white (distally) to clouded (basally); distal cells with diffuse dark spots. Basal cells also possessing orange shading. Dorsum of abdomen orangish; aedeagus appearing dark brown within paler terminalia.

Structure. Body length males (n =5): 7.11–7.32 mm with wings; 4.52–4.54 mm without wings; females (n =10): 7.41–7.70 mm with wings; 4.55–4.57 mm without wings. Head. In lateral view, anterior margin of head smoothly rounded ( Fig. 8C ). Vertex deeply concave posteriorly, notched distally ( Fig. 8B ), broadest near base, tapering distally; lateral margins decidedly keeled, bearing two (somewhat irregular) rows of sensorial pits, disc depressed, without distinct carinae. Transverse apical carina separating vertex from frons absent. Vertex length males: 0.30–0.31 mm; females: 0.32–0.33 mm. Vertex width at hind margin males: 0.37–0.38 mm; females: 0.38–0.39 mm. Vertex width at distal margin males: 0.15–0.17 mm; females: 0.17–0.20 mm. Frons with lateral carinae strongly keeled, narrowest between compound eyes, diverging slightly ventrad until reaching the frontoclypeal suture ( Fig. 8A ); sensorial pits next to each carina for entire length, carinae absent on disc of frons. Frons length males: 0.861 –0.863 mm; females: 0.870 –0.890 mm. Frons dorsal width males: 0.11–0.13 mm; females: 0.12–0.14 mm. Frons frontoclypeal margin width, males: 0.28–0.29 mm; females: 0.29–0.30 mm. Clypeus with lateral carinae keeled, sensorial pits absent, converging near midlength to labrum. Clypeus length males: 0.70–0.73 mm; females: 0.75–0.78 mm.

Thorax. Pronotum short, anterior margin following contours of posterior margin of head ( Fig. 8B ); convex, anteriorly truncate behind vertex, narrowed behind eyes; posterior margin moderately concave; paranotal regions moderately foliate, partially subtending antennae in lateral view, forming fossae ( Figs. 8 A-C). Pronotum length at midline males: 0.30– 0.30 mm; females: 0.31–0.33 mm. Mesonotum appearing slightly elevated in lateral view ( Figs. 8B, 8C ); in dorsal view, with three subparallel longitudinal carinae, indistinctly reaching posterior margin. Mesonotum length at midline males: 1.01–1.02 mm; females: 1.04–1.05 mm. Mesonotum width males: 1.22–1.24 mm; females: 1.26–1.29 mm.

Forewing ( Fig. 9 ) with row of sensory pits along costal vein, reaching fork of ScP, second row along basal 2/3 rd of ScP+R (nearly to fork of ScP) and third row along basal half of postcubitus. Forks of R and CuA veins approximately at the same level, both well proximad of claval apex. Claval apex just beyond midpoint of wing, fork of MP just distad of claval apex; RA 1-branched, RP 1-branched, MP 4-branched and CuA 3-branched. Junction of Pcu+A 1 in basal half of wing. Forewing length males: 6.27–6.30 mm; females: 6.70–7.00 mm.

Terminalia. Pygofer, in lateral view, narrow, distal and proximal margins sinuate ( Fig. 10A ), broadest ventrally; in ventral view, ventral opening of pygofer bearing rounded lobe ( Fig. 10B ), widest at base and attenuating distally to rounded apex, lobe at base wider than long. Parameres, in ventral view, broadest ventrally with margins running parallel until expanding into a large, rounded tooth at midlength, strongly hooked with sclerotized apex pointing anteriorly; portion distal to hooked tooth of uniform width, narrower than basal portion until expanding slightly at terminus which possesses an anteriorly facing sclerotized spine ( Figure 10B ); in lateral view possessing a single, large ventral lobe; dorsal surface bearing large lobe with an invagination on posterior aspect, resulting in two lightly sclerotized processes, with posterior process pointing dorsally and anterior process angled posteriorly. Aedeagus with four elongate processes, one shorter pair at apex, one large pair subapical, all angled ventrad and pointing anteriorly. Complex endosoma with large retrorse median process, medium sized pair of retrorse lateral processes, and dorsal pair of posteriorly facing processes ( Fig. 11 ). Endosoma complex, retrorse, bearing additional projections and asymmetrical 3-dimensional structures, but appearing to have two lateral processes, one medial process and a pair of dorsal processes ( Fig.11 ). Segment X (= “anal tube”), in lateral view, robust, caudal portion stout, and ventrally sinuate, apex acute and moderately downcurved; in dorsal view, deeply notched on caudal aspect ( Fig. 10 ).

Plant associations. Coquito ( Astrocaryum alatum H.F. Loomis ), Arecaceae .

Distribution. Costa Rica (Heredia).

Etymology. The specific name is an honorarium for the lead author’s daughter, Dahliana Lucía Bahder.

Material examined. Holotype male “ Costa Rica, Heredia / La Selva Biological Station / Brian W. Bahder ; 22 May 2018 / aspirated from coquito // Holotype / Agoo / dahliana ” ( FLREC) . Paratypes, same data as holotype (11 males, 18 females, FLREC) .

Figures

FIGURE 7. Adult male habitus Agoo dahliana sp. n.; A. body lateral view and B. body dorsal view (B), scale = 1 mm.

FIGURE 8. Adult male Agoo dahliana sp. n.; A. head frontal view, B. head, pronotum and mesonotum dorsal view, C. head, pronotum and mesonotum lateral view, scale=1mm.

FIGURE 9. Agoo dahliana sp. n., forewing venation.

FIGURE 10. Male terminalia of Agoo dahliana sp. n.; A. lateral view, B. ventral view, and C. dorsal view.

FIGURE 11. Aedeagus of adult male Agoo dahliana sp. n.; A. right lateral view, B. left lateral view, and C. dorsal view.