Daveyoungana Blocker & Webb 1992

Daveyoungana Blocker & Webb, 1992

Daveyoungana Blocker & Webb, 1992:12 type species: Daveyoungana collosa Blocker & Webb, 1992

Medium-sized, somewhat depressed leafhoppers. Ground color stramineous, dorsum with symmetrical dark brown and black markings, including pair of spots on crown mesad of eyes, symmetrical anterior lines and spots and pair of sublateral stripes on pronotum and additional dark markings on pronotum and forewing. Head in dorsal view (Fig. 1C) wider than pronotum; crown short, more than six times wider than long, anterior and posterior margins parallel; texture transversely striate; ocelli small, on face just anterad of anterior margin, not visible dorsally, mesad of antennal pits and well separated from eyes; transition from crown to face round and smooth, without transverse carina; frontoclypeus in anterior view (Fig. 1 F, G) evenly broadened from anteclypeus to dorsal margin, slightly convex and transversely striate dorsally; antennal ledge closer to anterodorsal than to anteroventral corner of eye, represented by prominent carina, slightly oblique, nearly horizontal, not concealing antennal base; antenna length one third width of head; lateral frontal suture absent; gena broad, obtusely incised ventrad of eye, with obtuse ventrolateral projection almost completely concealing proepisternum; lorum and anteclypeus sexually dimorphic, lorum in male (Fig. 1 F) narrower than in female (Fig. 1 G), flat, lateral suture extended nearly to dorsral margin of anteclypeus, anteclypeus much more strongly broadened and convex basally in male (Fig. 1 F) than in female (Fig. 1 G), not extended to frontoclypeus; anteclypeus wide and convex basally, gradually narrowed by 1/3 apically in male (Fig. 1 F) but by 1/ 2 in female (Fig. 1 G), apical margin truncate, extended slightly beyond ventral margin of gena; rostrum slender, extended to middle coxae (Fig. 1 F, G).

Pronotum (Fig. 1C) with anterior margin produced and extended anterad of eyes medially, posterior margin weakly concave, transverse striations well developed, lateral margin shorter than eye, carinate. Exposed part of mesonotum and scutellum slightly longer than pronotum; mesonotum rugulose; scutellum transversely striate, apex acuminate.

Forewing (Fig. 1C, D) smoky hyaline throughout length except small opaquely sclerotized area along costal margin; appendix very broad, extended to second apical cell; three closed anteapical cells present; inner apical cell long and narrow, maximum width subequal to half of apical cell 2, apical cells 2–4 short, parallel-sided. Hind wing with RP and MA fused apically.

Front femur (Fig. 2 E, F) with pair of dorsoapical macrosetae and AM1 well developed but PD, AD and AM without well differentiated preapical setae; intercalary group consisting of irregular double row of moderately fine setae continuous with setae in basal AV group; PV with several well differentiated long macrosetae; tibia (Fig. 2 E, G) with dorsal surface flattened but not expanded, dorsal rows undifferentiated, ventral rows with few stout preapical macrosetae. Hind femur macrosetae 2+2+1 with antepenultimate seta as large as others; tibial rows PD, AD, and AV with 10, 16, and 16 macrosetae, respectively; tarsomere I (Fig. 2 H) without enlarged dorsoapical setae, pecten with 4 slender platellae medially flanked by longer tapered lateral setae, plantar (ventral) surface with longitudinal row of simple (non-cucullate) setae; tarsomere II (Fig. 2 H) less than 1/2 length of tarsomere I, pecten with 2 slender platellae medially flanked by longer tapered lateral setae.

Male abdomen with sternite VII longer than sternite VI, posterior margin well produced (Fig. 5 F). Genital capsule with ventral part completely concealed by sternite VIII in repose, with only anal tube visible. Pygofer (Fig. 5 A) with tergite well sclerotized forming unbroken ring dorsally at base; lateral lobe partly separated from base by flexible membranous cleft, with numerous macrosetae of various sizes, basolateral setal group absent, posterior margin long; ventral process stout, arising at base and extended distad along ventral margin (Fig. 5 A, I, J). Anal tube short, weakly sclerotized dorsally, without processes. Valve (Fig. 5 A) broadly fused to pygofer. Subgenital plates (Fig. 5 H) separated at base, oblong, medial margin straight, lateral margin broadly rounded, apex subtruncate with numerous setae densely distributed along apical lateral margin. Style (Fig. 5 E) apodeme massive, expanded apically, extended dorsad at angle to apophysis; apophysis with basolateral lobe large, rounded, distal part elongate, slender. Connective (Fig. 5 G) well sclerotized, Y-shaped, stem longer than arms. Aedeagus (Fig. 5 C, D) with preatrium short, dorsal apodeme well developed; shaft curved dorsad in lateral view, with paired lateral processes extended distad; gonopore apical.

Female sternite VII roundly produced; Pygofer with numerous macrosetae on posterior portion. Ovipositor moderately elongate, curved dorsad, not protruding far beyond pygofer apex (Fig. 6 A); first valvulae (Fig. 6 B–D) moderately slender, evenly curved, dorsal sculpturing imbricate, apex abruptly tapered and slightly attenuated; second valvulae (Fig. 6 E–G) moderately slender, dorsal margin with three widely spaced teeth in distal half, apex evenly tapered to bluntly rounded tip, finely serrate dorsally. Gonoplacs (Fig. 6 H, I), in lateral view, not sclerotized at dorsal margin of basal half, widened at middle then narrowed to round apex.

Distribution. Brazil, Ecuador.

Notes. Daveyoungana appears to be one of the more plesiomorphic New World members of Hyalojassini, given its fully developed forewing venation and male genitalia with Y-shaped connective and styles articulated to the connective. The enlarged macrosetae in front femoral row PV are unique among known Hyalojassini but such setae occur in the endemic New World iassine tribe Gyponini.