Issus christiani, Gnezdilov, 2019

Issus christiani View in CoL sp. nov.

( Figs 1–12 View Fig View Figs 2–3 View Figs 4–12 )

Holotype, Male , “FASMaAl 80–65, Algerien, w / Abdelmalek Ramdan / nö Sidi Lakhdar, / [36°08'10''N 0°21'02''E, Radius” // “ 20 km, alt. 0–250 m], Krüppel – / wald an Küsten–Berghang / keine Windschur, Pinus marit., / Junip. Phoen., Arbutus, Ulex,” // “Calicot., Lav. stoechas, Quer- / cus? cocc. od ilex – Büschchen, / Lentiske, 29.07.1980, leg. / coll. / R. Remane, Museum Dresden” // “ Issus grün ♂ / (lauri?) / det. R. Remane” ( SNSD). GoogleMaps

Etymology. The species named after Dr. Christian Schmidt – curator of Hemiptera collection in Staatliche Naturhistorische Sammlungen in Dresden who put his kind efforts to accommodate R. Remane’s materials into the main collection and make it available for study.

Type locality. Mostaganem Province, NE Sidi Lakhdar (36°08'10''N, 0°21'02''E) GoogleMaps .

Diagnosis. General coloration light brown yellowish green. Habitus stout (head with fore wings combined, in dorsal view). Ventral aedeagal hooks short – 0.25 times as long as phallobase.

Description. Body stout, shortly oval (in comparison to I. tubiflexus and I. vaucheri with fore wings longer) ( Figs 1 View Fig , 13, 14 View Figs 13–14 ). Coryphe elongate, 1.3 times as long as pronotum at midline, with weak median carina; lateral margins slightly converging apically ( Fig. 2 View Figs 2–3 ). Anterior margin of coryphe strongly convex; posterior margin concave. Metope elongate, weakly enlarged below the eyes, with distinct median carina, running from its upper margin to metopoclypeal suture, and with sublateral carine, distinct only in upper half of metope. Median and sublateral carinae of metope joint at one point on its upper margin. Metopoclypeal suture distinct, convex. Coryphe and metope joint at obtuse angle (in lateral view). Ocelli absent. Pedicel elongate. Pronotum with weak median carina and pair of concavities besides of it; anterior margin strongly convex; posterior margin nearly straight, with weak median concavity. Paradiscal fields of pronotum wide. Paranotal lobes wide, without carinae. Mesonotum 1.3 times as long as pronotum at midline, with weak median carina and distinct lateral carinae. Tegulae small. Fore wings with narrow and short hypocostal plate. Basal cell small. R 2, furcating closely to basal cell. M 2, furcating shortly after R. CuA 2, furcating after wing middle. Many transverse veins ( Fig. 3 View Figs 2–3 ). Hind wings oval, reaching hind margin of abdominal tergite VI. Hind tibia with 2 lateral spines in its distal half and 8 apical spines. First metatarsomere slightly longer that second one, with 2 latero-apical and 5 intermediate spines arranged in a continuous row. Second metatarsomere with only 2 latero-apical spines.

Coloration. General coloration light brown yellowish green ( Fig. 1 View Fig ). Head with transverse dark brown stripe running across upper part of metope below coryphe margin, excluding pale median carina and traces of larval sensory pits, and preocular fields. Pedicel light yellow basally and brown in its apical half. Paranotal lobes brown excluding light yellow lower margins and pustules. Fore wing veins green. Leg spines brown, with black apices. Claws dark brown to black.

Male genitalia ( Figs 4–12 View Figs 4–12 ). Anal tube nearly 2.5 times as long as wide (in dorsal view); lateral margins not turned down (in lateral view); apex with weak concavity ( Figs 11, 12 View Figs 4–12 ). Pygofer with convex hind margins in its upper half (in lateral view) ( Fig. 7 View Figs 4–12 ). Phallobase horse-shoe shaped (in lateral view), without median carina ventrally, nearly completely covering the aedeagus ( Figs 4, 5 View Figs 4–12 ). Processes of inner walls of dorsolateral lobes of phallobase (piph) (or earlike processes in Gnezdilov 2017) wide and rounded. Projections of ventral margins of dorsolateral lobes of phallobase (pvm) (or subapical lobes of phallobase in Gnezdilov 2017) large, rounded. Ventral phallobase lobe long, wide, as long as dorso-lateral lobes, convex apically. Apical aedeagal processes wide (in lateral view), slightly surpassing upper phallobase margin, with rounded subapical projections (sap) ( Fig. 6 View Figs 4–12 ). Ventral aedeagal hooks short (0.25 times as long as aedeagus), flat, slightly enlarged basally, narrowing to pointed apices, directed to aedeagus midline ( Figs 4, 5 View Figs 4–12 ). Connective with wide cup ( Fig. 10 View Figs 4–12 ). Style with concave hind margin and rounded caudo-dorsal angle ( Fig. 9 View Figs 4–12 ). Capitulum of style narrowing apically (in dorsal view), with wide neck and wide lateral tooth ( Fig. 8 View Figs 4–12 ).

Total length (from apex of coryphe to apices of fore wings). 5.0 mm.

Comparison. The species belongs to “yellowish green” group of Issus species ( Figs 13, 14 View Figs 13–14 ) and it is morphologically very similar and presumably closely related to I. vaucheri according to structure of male genitalia, but differs by shorter fore wings and shorter ventral aedeagal hooks. The differences between all African species of the genus are given in the key below.