Orthopagus hainanensis Song, Chen & Liang

Song, Zhi-Shun, Malenovsky, Igor, Chen, Jian-Qin, Deckert, Juergen & Liang, Ai-Ping, 2018, Taxonomic review of the planthopper genus Orthopagus (Hemiptera, Fulgoromorpha, Dictyopharidae), with descriptions of two new species, Zoosystematics and Evolution 94 (2), pp. 369-391 : 373-374

Orthopagus hainanensis Song, Chen & Liang sp. n. Figs 2 E–F, 3C, 6 A–I, 7 A–G

Type material.

Holotype male, CHINA: Hainan: Baoting, 80 m, 21.vii.1960, S. F. Li leg. (IZCAS).

Paratypes. CHINA: Hainan: 6 males, 24 females, Baoting, 80 m, 23., 24. and 27.vii.1960, S. F. Li, X. Z. Zhang & C. Q. Li leg.; 11 males, 15 females, Tongshi, 340 m, 23., 24. and 25.vi., 31.vii., 1., 4. and 6.viii.1960, S. F. Li, X. Z. Zhang & C. Q. Li leg.; 1 male, 1 female, Yinggen, 200 m, 4.v. and 5.vii.1960, S. F. Li leg.; 1 female, Shuiman, 640 m, 25.v.1960, C. Q. Li leg.; 2 males, Wanning, 10 m, 12., 13.iv.1960, S. F. Li & C. Q. Li leg.; 3 females, Qiongzhong, 15-17.vii.1960, X. Z. Zhang & C. Q. Li leg.; 2 males, 3 females, Kwangtung, 3., 4. and 5.iv., 13. and 26.viii.1934, C. Ho leg. (all IZCAS); 1 male, Mangrin, 9.vi.1904; 1 female, Mon Boi, 29.v.1904 (both BMNH).

Diagnosis.

Orthopagus hainanensis sp. n. is similar to O. lunulifer in most characters, but can be differentiated from the latter by the ivory white to pale ochraceous vertex with a pair of dark brown spots on each side of midline in basal third (in O. lunulifer , the vertex is nearly dark brown from base to apex) and the male segment X being elongate in dorsal view, with ratio of length to width near middle 1.9-2.0 (in O. lunulifer , the male segment X is shorter and wider in dorsal view, with ratio of length to width near middle 1.2-1.3). Orthopagus hainanensis sp. n. is also similar to O. exoletus in the predominantly light vertex but it differs from the latter by a slightly longer head, the male pygofer with dorso-posterior margin produced into a broad and short lobe in lateral view (the pygofer bears a larger tooth-like process dorso-posteriorly in O. exoletus ) and the aedeagus with two pairs of larger (more strongly inflated) dorsolateral membranous lobes and endosomal processes covered with minute spines (indistinct in O. exoletus ).

Description.

Measurements (5 males, 10 females). Body length (from apex of head to tip of forewings): male 11.7-12.9 mm, female 13.1-14.6 mm; head length (from apex of cephalic process to base of eyes): male 1.4-1.5 mm, female 1.5-1.6 mm; head width (including eyes): male 1.6-1.7 mm, female 1.6-1.7 mm; forewing length: male 9.3-10.3 mm, female 10.6-11.8 mm.

Coloration. General coloration as in generic description (Fig. 2 E–F). Head ivory white to pale ochraceous, vertex with basal corners castaneous, a pair of large fuscous patches on each side of midline at basal third, and pale fuscous apical diamond-shaped spot (Fig. 6A); frons pale with series of small pale fuscous spots along intermediate and lateral carinae, base without distinct dark spot (Fig. 6C). Forewing pattern as in Fig. 3C. Hind wing membrane with a relatively narrow dark brown streak along the apical portion of CuA1 vein, extending along hind wing apical margin.

Structure. Cephalic process (Fig. 6 A–C) relatively elongate. Vertex (Fig. 6A) with ratio of length at midline to width between eyes 1.65-1.75. Transition of vertex to frons narrowly rounded in lateral view (Fig. 6B). Frons (Fig. 6C) relatively narrow, with ratio of length at midline to maximum width 2.7-2.9.

Male genitalia. Pygofer in lateral view (Fig. 6E) with dorso-posterior margin produced into a broad and relatively short blunt lobe; in ventral view (Fig. 6F) much longer than in dorsal view (Fig. 6D) with ratio of ventral to dorsal length about 4.2. Gonostyles (Fig. 6 E–F) large, broad medially, with dorsal margin weakly sinuate. Aedeagus (Fig. 6 G–I) with endosomal processes covered with minute spines, extended posteriad and strongly curved dorso-anteriad; phallobase with one pair of large, strongly inflated dorsolateral lobes, their apices gradually convergent and tapering posteriad (Fig. 6 G–I), and one pair of small, thumb-like ventral lobes (Fig. 6I). Segment X relatively narrow and elongate, in lateral view, narrow basally, widening beyond middle, apex subacute (Fig. 6E), in dorsal view, widest medially, with ratio of length to width 1.9-2.0 (Fig. 6D).

Female genitalia as in generic description (Fig. 7 A–G).

Etymology.

The new species is named for its occurrence in Hainan Island, China. The specific epithet hainanensis is to be treated as a latinized adjective in nominative singular.

Distribution.

So far only known from Hainan Island, China.