Liadopsylla (Basicella) lautereri, VISMARA, 2020

VISMARA, GIULIA, 2020, Corrispondenze e interazioni tra suono spazio e corpo, strategie per un design sonoro dello spazio, Russian Entomological Journal 29 (2), pp. 127-138 : 130-132

Liadopsylla (Basicella) lautereri Shcherbakov, sp.n.

Figs 14–19 .

MATERIAL. Holotype forewing PIN 5340 /1371±; paratype forewings PIN 5340 /520, 1377±; paratype (sex unknown) PIN 5340 /1498; Khasurty , 10 km S of Tsakir, Zakamensk district, SW Buryatia, Russia; Lower Cretaceous.

DESCRIPTION. Forewing 2.8–3.3 mm long, moderately elongate (2.0–2.1:1), widened up to apex of pterostigma, obliquely rounded apically, tornus inconspicuous. Nodal line absent. Costal margin evenly arched; costal space moderately wide. Pterostigma barely noticeable by darker, raised membrane and wider distal RA. R+M+CuA dividing before or at 1/5, R stem before 1/3, and M+CuA before 0.4 wing length. R fork moderately wide basally, acute with gently curved RA and proximal RP. RA x1.5 shorter than RP, curved forwards before apex; RP slightly sigmoidal distally. M+CuA stem x1.5–2.0 as long as R stem and slightly longer than R+M(+CuA). M stem somewhat shorter than (or equal to) M2 and x1.6–2.0 as long as CuA stem, M fork relatively short and wide (2.2–2.5:1). CuA1 x2.2–2.3 as long as CuA stem and x2.7–3.4 as CuA2. Clavus narrow, with concave posterior margin; Pcu+1A distally running along the margin and joining it near clavus apex. Veins dark, especially RP, M and CuA, membrane slightly darkened, more so around apex.

VARIATION. The largest forewing PIN 5340 /520 with the base of pterostigma marked with a slight RA bend and its boundary with a groove posterior to RA ( Fig. 19 ), and the M and CuA veins darker than in other specimens, may represent the female sex or another, closely similar species. In two other paratypes, the R stem is relatively shorter (about 1/2 of M+CuA stem) than in the holotype, and in one of them, M2 is equal to M stem and CuA2 short .

ETYMOLOGY. To the memory of a Czech expert in psyllids, Pavel Lauterer (1933–2016).

Figures

Figs 13–21. Liadopsyllidae, forewings; Khasurty, Lower Cretaceous: 13 — Stigmapsylla klimaszewskii gen. et sp.n., holotype (photograph mirrored); 14–19 — Liadopsylla (Basicella) lautereri subgen. et sp.n.: 14, 17 — paratype PIN 5340/1377 (costal margin tucked under); 15– 16 — holotype; 18–19 — paratype PIN 5340/520; 20–21 — L. (B.) loginovae sp.n., holotype (costal margin tucked under; images mirrored; arrows — ir crossvein and M break at nodal line); 15–21 — SEM; 16–18 — forewing base (asterisk — free CuA base); 19 — area of pterostigma (arrows —posterior boundary of pterostigma and RA bend at its base). Scale bar: 13–15, 20, 21 — 0.5 mm, 16–19 — 0.2 mm. Рис. 13–21. Liadopsyllidae, передние крыльЯ; Хасурты, нижний мел: 13 — Stigmapsylla klimaszewskii gen. et sp.n., голотип (фото перевёрнуто Зеркально); 14–19 — Liadopsylla (Basicella) lautereri subgen. et sp.n.: 14, 17 — паратип ПИН 5340/1377 (костальный край подогнут); 15–16 — голотип; 18–19 — паратип ПИН 5340/520; 20–21 — L. (B.) loginovae sp.n., голотип (костальный край подогнут; иЗображениЯ перевёрнуты Зеркально; стрелки — поперечнаЯ жилка ir и раЗрыв M на нодальной линии); 15–21 — СЭМ; 16–18 — основание переднего крыла (ЗвёЗдочка — свободное основание CuA); 19 — область птеростигмы (стрелки —Задний край птеростигмы и иЗгиб RA в её основании). Длина масштабной линейки: 13–15, 20, 21 — 0,5 мм, 16–19 — 0,2 мм.