Tetrichina trihamulata 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 trihamulata Chang & Chen

sp. nov.

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

Type material.

Holotype: ♂, China: Hainan Province, Jianfengling National Park (18°42'N, 108°51'E), 20 April 2014, W-C Yang leg.; paratypes: 3♂♂ 2♀♀, data same as holotype; 5♂♂, Hainan, Jianfengling (18°42'N, 108°51'E), 13-16 January 2011, J-K Long and P Zhang; 2♂♂2♀♀, Hainan, Bawangling National Nature Reserve (22°28'N, 106°57'E), 7-11 January 2011, J-K Long and P Zhang; 2♂♂, Hainan Province, Datian National Nature Reserve (19°06'N, 108°47'E), 12-13 April 2013, J-K Long, J-C Xing and Y-B Zhang leg.


This new species looks like Sarimodes clavatus  Meng & Wang, 2016 ( Meng and Wang 2016: figs 17-32), but differs from the latter by: 1) vertex shorter in middle line than its maximum width, but longer in S. clavatus  ; 2) capitulum of genital styles with anterior margin with one triangular prominence near base, but in S. clavatus  without triangular prominence; 3) phallobase with dorsal lobe with one stout bidirectional hooked process in lateral view; but with one hooked process in S. clavatus  .


Body length: male 5.02-5.64 mm (N = 13), female 5.73-5.82 mm (N = 4); forewing: male 4.13-4.57 mm (N = 13), female 4.70-4.88 mm (N = 4).

Coloration. General colour yellow-green (Figs 28View Figures 28–39, 29View Figures 28–39). Compound eyes brown, ocelli pale green (Fig. 31View Figures 28–39). Forewings (Fig. 28View Figures 28–39) yellow-green, with diffuse brownish irregular speckles near middle. Tip of spines on hind tibiae and tarsi black.

Head and thorax. Head (Fig. 30View Figures 28–39) including eyes narrower than pronotum (0.76: 1.00). Vertex (Fig. 30View Figures 28–39) shorter in middle than the width (0.63: 1.00), median carina liner. Frons (Fig. 32View Figures 28–39) slightly longer in middle than its maximum breadth (1.02: 1.00), median carina stout, lateral carinae slender. Pronotum (Fig. 30View Figures 28–39) shorter in midline than the width (0.24: 1.00). Mesonotum (Fig. 30View Figures 28–39) shorter in midline than the width (0.30: 1.00). Forewings (Fig. 33View Figures 28–39) longer than width (2.00: 1.00), RP simple, reaching apical margin, MP two branched near middle, MP1 and MP2 forked near distal part, CuA forked into two branches in middle of forewing, paralleling MP bifurcation, Pcu and A1 uniting slightly before MP bifurcation. Hindwings (Fig. 34View Figures 28–39) without transverse vein between Pcu+A11 and A12. Spinal formula of hind leg (2)8/6, 10/2.

Male genitalia. Anal tube (Fig. 36View Figures 28–39) longer in middle than its widest breath (2.40: 1.00) in dorsal view, anterior margin obtuse convex, the base extremely narrow, the width near apical 1/4. Anal style (Fig. 36View Figures 28–39) thin, located near middle, surpassing the end of anal pore. Pygofer (Fig. 35View Figures 28–39) with anterior margin straight, posterior margin arched convex in lateral view. Genital styles (Fig. 35View Figures 28–39) with antero-dorsal margin short, anterior margin bearing obvious triangular prominence (Fig. 35aView Figures 28–39) and posterior margin bearing unobvious triangular prominence (Fig. 35bView Figures 28–39) near base of capitulum. Capitulum with of genital styles irregular triangular, with irregular lobed process in basal of capitulum (Fig. 35cView Figures 28–39), neck of capitulum extremely stout (Fig. 37View Figures 28–39). Phallobase (Figs 38View Figures 28–39, 39View Figures 28–39) with dorsal lobe simple, apical part membranous, in lateral view, with one stout bidirectional hooked process (Fig. 35dView Figures 28–39) on each side, one short directing to anterior-dorsad, one relatively long, directing to posterior-dorsad; ventrolateral lobe with irregularly quadrangular prominence (Fig. 35eView Figures 28–39) in basal 1/3 in lateral view; lateral lobe splitting into two branches, more longer than dorsal lobes; ventral lobe shorter than lateral lobe in lateral view, apical part with lobe-liked process (Fig. 39fView Figures 28–39) in ventral view. Aedeagus (Figs 38View Figures 28–39, 39View Figures 28–39) with one extremely long hooked process on each side (Fig. 38gView Figures 28–39) in lateral view, directing to cephalad (Fig. 39gView Figures 28–39).

Female genitalia. Anal tube (Figs 40View Figures 40–48, 43View Figures 40–48) longer in middle line than the width (2.10: 1.00), apical margin arched convex, lateral margins paralleled. Anal style (Fig. 43View Figures 40–48) relatively long and stout, located in basal 1/4 of anal tube, surpassing the end of anal pore. Gonocoxa VIII relatively long and narrow, gonocoxa VIII with endogonocoxal lobe obvious, with one small claviform sclerotic process, endogonocoxal process membranous and developed (Fig. 44View Figures 40–48). Anterior connective lamina of gonapophyses VIII (Fig. 44View Figures 40–48) with four keels leading to four teeth in lateral group and three teeth in series in apical group. Posterior connective lamina of gonapophyses IX (Figs 45View Figures 40–48, 46View Figures 40–48) narrow, sub-triangular in dorsal view, lateral field membranous developed, with triangular membranous process with microvilli (Fig. 45View Figures 40–48: lf); sub-lateral field developed and sclerous, with the inner margin waved (Fig. 45View Figures 40–48: slf); median field with symmetric goblet-shaped process, apical margin in middle concave (median dorsal process) (Fig. 45View Figures 40–48: mdp); distal parts bent at obtuse angled in dorsal view (posterior ventral lobes) (Fig. 45View Figures 40–48: pvd). Hind margin of sternite VII obviously convex in medial area in ventral view (Figs 42View Figures 40–48, 48View Figures 40–48).


China (Hainan).


The species name is derived from a combination of the prefix “tri-” and Latin noun “hamulata”, referring to the phallobase and aedeagus with three variously hooked processes.

Host plant.