Tetrichina Chang & Chen,

Chang, Zhi-Min, Yang, Lin & Chen, Xiang-Sheng, 2020, Two new genera with species of the tribe Sarimini (Hemiptera, Fulgoromorpha, Issidae) from China, ZooKeys 956, pp. 31-47: 31

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Tetrichina Chang & Chen

gen. nov.

Tetrichina Chang & Chen  gen. nov. Figures 28-39View Figures 28–39, 40-48View Figures 40–48

Type species.

Tetrichina trihamulata  Chang & Chen, sp. nov., here designated.

Diagnosis. Related to the genus Sarimodes  Matsumura, 1916, but it is distinguished as follows: frons (Fig. 32View Figures 28–39) without obvious verrucae along basal and lateral margins (frons with obvious verrucae in Sarimodes  ( Meng and Wang 2016: fig. 18)); forewings (Fig. 33View Figures 28–39) with ScP long, reaching apical margin of forewing, with short vein in base of ScP (ScP only surpassing middle of forewings, without short vein in Sarimodes  (op. cit.: fig. 19)); genital styles (Fig. 35View Figures 28–39) irregularly elliptical in lateral view, neck of capitulum extremely long (genital styles irregularly rounded, neck of capitulum short in Sarimodes  (op. cit.: fig. 22)).


Body medium size, slightly flat in dorsal view.

Head and thorax. Width of head including eyes narrower than pronotum (Fig. 28View Figures 28–39). Vertex (Fig. 30View Figures 28–39) quadrangular, shorter in middle than its maximum width in dorsal view, disc of vertex depressed, median carina obscure, with one pit between median and lateral carinae; anterior margin obtusely convex, posterior margin arched concave, lateral margins paralleled. Gena (Fig. 31View Figures 28–39) with one obvious ocellus between compound eye and antenna on each side in lateral view. Frons (Fig. 32View Figures 28–39) irregularly hexagonal, length in midline nearly equal to its maximum breadth; with median and lateral carinae, reaching frontoclypeal suture; without obvious verrucae along basal and lateral margins; basal margin obtusely concaved; frontoclypeal suture slightly arched concave, lateral margins not paralleled; the base narrow, the maximum width below level of antenna. Clypeus (Fig. 32View Figures 28–39) triangular, with median carina stout, short or long. Rostrum just reaching mesotrochanters. Pronotum (Fig. 30View Figures 28–39) triangular, with median and lateral carinae, and with two pits between median and lateral carinae, anterior margin obtusely-angle concaved, posterior margin straight. Mesonotum (Fig. 30View Figures 28–39) triangular, with median and lateral carinae, sublateral carinae obscure. Forewings (Fig. 33View Figures 28–39) irregularly oval, anterior margin distinctly arched convexly, posterior margin straight, apical margin distinctly arched, longitudinal veins obvious, with a few unobvious short transverse veins, without hypocostal plate; ScP long, reaching apical margin, ScP forked one short vein near base, ScP and RP have a common ScP+RP base, RP simple, not forked, MP and CuA forked into two branches near middle of forewing, CuP present, Pcu and A1 uniting near base 2/3 of clavus, clavus almost 4/5 of forewing. Hindwings (Fig. 34View Figures 28–39) well-developed of typical Sarimini  type, three lobes, ScP+PR have a common stem, forked near apical part, MP simple, not forked, CuA forked into branched CuA1 and CuA2 near apical part, CuA2 and CuP fused apically, with one transverse vein between RP and MP, MP and CuA1, Pcu and A11 anastomosing at medium distance, Pcu, A11, and A12 not branched, A2 lobe relatively narrow, A2 vein simple. Hind tibiae each with two lateral spines near distal half.

Male genitalia. Anal tube (Fig. 36View Figures 28–39) irregularly pentagonal, longer in middle than its widest breadth in dorsal view, basal part extremely narrow, apical part broad, the maximum width near the apical part. Anal style (Fig. 36View Figures 28–39) relatively long, not surpassing the end of anal tube. Pygofer (Fig. 35View Figures 28–39) symmetrical, irregularly rectangular in lateral view, dorsal and ventral margin paralleled. Genital styles (Fig. 35View Figures 28–39) irregularly elliptical in lateral view, postero-dorsal margin long and nearly parallel to ventral margin, bearing process near base of neck. Capitulum (Fig. 37View Figures 28–39) extremely developed, neck of capitulum extremely long. Phallobase (Figs 38View Figures 28–39, 39View Figures 28–39) symmetrical, U-like tube in lateral view, apical part of dorsal lobe with hooked processes on each side in lateral view. Aedeagus (Figs 38View Figures 28–39, 39View Figures 28–39) with one hooked process on each side in lateral view.

Female genitalia (Figs 40-48View Figures 40–48). Anal tube (Figs 40View Figures 40–48, 43View Figures 40–48) elongate, longer in middle line than its width. Anal style (Fig. 43View Figures 40–48) long, located near base of anal tube, not surpassing the end of anal tube. Anterior connective lamina of gonapophyses VIII (Fig. 44View Figures 40–48) irregularly rectangular, with four keeled teeth in lateral group and three large teeth in apical group. Posterior connective lamina of gonapophyses IX (Figs 45View Figures 40–48, 46View Figures 40–48) triangular and narrow in dorsal view. Gonoplacs (Fig. 47View Figures 40–48) irregularly round, without keels. Hind margin of sternite VII with prominence in middle area in ventral view (Fig. 48View Figures 40–48).


China (Hainan).


The generic name is derived from the arbitrary combination of generic name " Tetrica  " and word “China”. The gender is feminine.