Orthopagus philippinus Melichar, 1914

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 : 377

Orthopagus philippinus Melichar, 1914 Figs 2I-J , 3E , 9A-J

Orthopagus philippinus Melichar, 1914: 173, Pl. I, figs 1, 2. Lectotype (here designated) male, Los Baños, Philippines ( MMBC, examined).

Type material examined.

Lectotype male (here designated), (1) Los Banos, P.I. Baker; (2) 1311; (3) Orthopagus philippinus [ Melichar’s handwriting] det. Melichar; (4) Collectio Dr. L. Melichar, Moravské museum Brno; (5) Orthopagus male Orthopagus philippinus sp.n., L. Melichar, 1914 [ Lauterer’s handwriting], P. Lauterer det. 1991; (6) Syn-typus [red label]; (7) Invent. č. 4954/Ent., Mor. muzeum, Brno; (8) Lectotypus male, Orthopagus philippinus Melichar, 1914, designated by Z. S. Song & I. Malenovský, 2018 [newly added red label] ( MMBC).

Paralectotypes, 4 females, same locality labels as holotype but Inv. nos 4949-4951, 4953;1 female, Mt. Makiling, Luzon, Baker ( MMBC, Inv. no. 4952, all paralectotypes bearing the following label: Paralectotypus female, Orthopagus philippinus Melichar, 1914, designated by Z. S. Song & I. Malenovský, 2018).

Other material examined.

PHILIPPINES: Luzon island : 1 male, Mt. Makiling , Baker leg. ( USNM) ; 1 male, Los Banos , 11.xii.1913, D. T. Fullaway leg. ( BPBM) ; 1 male, Los Banos , i.1913, P. Ledyard leg (LBOB) ; 2 males, Mt. Montalban, Rizal, Wa-wa Dam , 150-200 m, 6. and 17.iii.1965, H. M. Torrevillas leg. ( BPBM) ; 1 male, 4 females, Manila, G. Boettcher leg. ( MMBC) ; 1 male, 2 females, "B. M. 1925-491", E. M. Ledyard leg.; 1 female, "Acc. No. 6625, Lot, Bu. of Sci. , P. I.,1908-228", C. S. Banks leg. ; 1 male, "Acc. No. 5364, Lot , Govt. Lab. Coll., 1908-228", C. S. Banks leg. (all BMNH).

Redescription.

Measurements (4 males, 9 females). Body length (from apex of head to tip of forewings): male 10.6-11.4 mm, female 12.9-13.9 mm; head length (from apex of cephalic process to base of eyes): male 1.25-1.33 mm, female 1.35-1.45 mm; head width (including eyes): male 1.30-1.43 mm, female 1.50-1.60 mm; forewing length: male 8.5-9.1 mm, female 10.3-11.4 mm.

Coloration. General coloration as in generic description (Figs 2I-J ). Vertex predominantly dark brown, lateral margins with a pale ochraceous S-shaped streak in posterior three quarters (Fig. 9A ). Frons light ochraceous with small dark brown spots along intermediate and lateral carinae and a large roundish dark brown spot at base (Fig. 9C ). Forewing membrane pattern as in Fig. 3E . Hind wing membrane with a narrow dark brown infuscation along the apical portion of CuA1 vein, not extending along hind wing apical margin.

Structure. Head with cephalic process moderately elongate (Figs 9A-B ). Vertex (Fig. 9A ) with ratio of length at midline to width between eyes 1.6-1.8. Transition of vertex to frons blunt, broadly rounded in lateral view, cephalic process thus appearing inflated and bulbous apically (Fig. 9B ). Frons relatively narrow, with ratio of length at midline to maximum width 2.7-3.1.

Male genitalia. Pygofer, in lateral view, with dorso-posterior margin produced into a relatively large but narrow, tooth-like, apically obtuse process (Fig. 9E ); in ventral view (Fig. 9F ) much longer than in dorsal view (Fig. 9D ) with ratio of ventral to dorsal width about 2.5. Gonostyles (Fig. 9G ) large, broad medially, with dorsal margin weakly sinuate. Aedeagus (Fig. 9H-J ) with endosomal processes covered with minute superficial spines, extended posteriad and strongly curved laterad and dorso-anteriad but not reaching the base of phallobase; phallobase with one pair of large, strongly inflated dorsolateral lobes, their apex convergent and tapering posteriad (Fig. 9I ), and one pair of smaller, thumb-like ventral lobes, directed ventro-posteriad (Fig. 9I-J ). Segment X, in lateral view, relatively narrow basally, widening to apex beyond middle, apex blunt (Fig. 9E ); in dorsal view, relatively large and broad, widest in apical third, ratio of length to maximum width 1.0-1.1 (Fig. 9D ).

Female genitalia as in generic description.

Distribution.

So far only known from the Luzon island, Philippines.

Remarks.

Orthopagus philippinus can be easily recognized from other species of the genus by the shape of the head and the presence of a relatively large roundish dark spot at base of frons which is present in all specimens studied.

Melichar (1914) indicated that he described this species based on five (male and female) specimens from "Luzon, Los Baños, Mt. Maquiling (C. F. Baker)". Six specimens (1 male, 5 females) preserved in Melichar personal collection in MMBC and labelled as either from Los Baños or Mt. Makiling and collected by Baker are considered here as the original syntypes. The male specimen is designated here as the lectotype for O. philippinus to stabilize the nomenclature according to Article 74 of ICZN (1999).

Figures

Figure 2. Habitus of Orthopagus species. (A, B) O. bartletti sp. n., male, holotype, Karnataka, India; (C, D) O. exoletus (Melichar), male and female, Sri Lanka; (E, F) O. hainanensis sp. n., male and female, paratypes, Hainan, China; (G, H) O. lunulifer Uhler, male and female, China; (I, J) O. philippinus Melichar, male and female, Philippines; (K, L) O. splendens (Germar), male and female, China.

Figure 3. Forewing of Orthopagus species. (A) O. bartletti sp. n.; (B) O. exoletus (Melichar); (C) O. hainanensis sp. n.; (D) O. lunulifer Uhler; (E) O. philippinus Melichar; (F) O. splendens (Germar).

Figure 9. Orthopagus philippinus Melichar. (A) Head, pronotum and mesonotum, dorsal view. (B) Head and pronotum, lateral view. (C) Head and pronotum, ventral view. (D) Male segment X and pygofer, dorsal view. (E) Male pygofer, gonostyles, and segment X, lateral view. (F) Male pygofer and gonostyles, caudal view. (G) Gonostyle; (H) Aedeagus, dorsal view. (I) Aedeagus, lateral view. (J) Aedeagus, ventral view.