Cribrus Oman , 1949

Kits, Joel H., 2024, Boreolimnus, a new leafhopper genus from northern North America, with a review of Cribrus Oman (Hemiptera, Cicadellidae, Deltocephalinae), ZooKeys 1217, pp. 273-290 : 273-290

Cribrus Oman, 1949

Type species.

Laevicephalus shingwauki Beamer & Tuthill, 1934 , by original designation ( Oman 1949: 166).

Diagnosis.

Separated from other genera of Paralimnini by the following combination of characters: male subgenital plates with uniseriate macrosetae, plates truncate and shorter than pygofer; pygofer without processes; pygofer with a prominent pair of dorsal spots; connective linear with posterior stem about as long as wide (connective loop-shaped sensu Emeljanov (1999)); aedeagus with swollen atrium, short shaft with apical gonopore and one pair of apical processes; frontoclypeus and pronotum with longitudinal stripes; wings usually brachypterous, fore wing with three closed anteapical cells.

Description.

Small leafhoppers with typical Paralimnini structure. Colour generally stramineous, head and pronotum with longitudinal stripes, wing with indistinct brown infuscation around cell borders (Figs 26–31 ).

Head with crown bluntly angled, medial length about equal to width between eyes (Figs 26 , 27 ). Crown glabrous at base, margin and face shagreen. Lateral frontal sutures terminating just ventral of ocelli, ocelli about their own diameter distant from eye (Fig. 30 ). Mesal margin of eye notched. Anteclypeus with margins slightly convex, distal third distinctly tapered. Lorum about half width of anteclypeus, well separated from genal margin. Antennae about as long as head width.

Pronotum slightly narrower than width of head across eyes, about as long as medial length of head. Fore femur with AM 1 near ventral margin, row IC with a few fine setae, row AV consisting of a few, widely spaced, very short setae. Fore tibia with 1 AD and 4 PD macrosetae. Hind femur with 2 + 2 + 1 macrosetae. First hind tarsomere with two rows of plantar setae, four apical platellae between a pair of longer normal setae. Fore wing with three closed anteapical cells, although venation may be distorted due to brachyptery.

Male abdomen with apodemes on sternite II poorly developed, shorter than width. Pygofer about twice as long as wide, with a patch of long macrosetae posterodorsally and a few small macrosetae scattered ventrally (Figs 32 , 33 ). Pygofer dorsally with a pair of heavily sclerotized spots basal to segment X. Segment X about as long as wide, completely sclerotized dorsally and laterally. Valve parabolic. Subgenital plates truncate, shorter than pygofer, bearing a single row of macrosetae laterally (Fig. 34 ). Connective with arms fused anteriorly, tapered towards posterior end, stem abruptly broadened apically, wider than arms. Style apophysis with lateral lobe weakly developed, medial lobe with corrugated sculpture but no distinct teeth. Aedeagus with swollen atrium, shaft very short with apical gonopore, with one pair of apical processes (Figs 35 , 36 ).

Female pygofer with moderate length macrosetae (Fig. 37 ). Ovipositor not projecting beyond pygofer. Gonoplac without macrosetae. First valvula slightly concave; sculpture imbricate dorsally and strigate ventrally (Fig. 38 ). Second valvulae evenly tapered distally, with rounded teeth decreasing in size distally (Fig. 39 ).

Figures

Figures 26–40. Cribrus concinnus 26 dorsal habitus, male 27 dorsal habitus, female 28 abdomen ventral, female 29 lateral habitus, male 30 face 31 lateral habitus, female 32 male pygofer, dorsal 33 male pygofer, lateral 34 male subgenital plate, styles, connective, dorsal 35 aedeagus, caudal 36 aedeagus, lateral 37 female genital capsule, ventral 38 first valvifer, lateral, with enlargement 39 second valvifers, lateral, with enlargement 40 female sternite VII, ventral.