Orthophana ( Orthophana ) maichiae, Constant & Pham, 2016

Orthophana ( Orthophana) maichiae View in CoL sp. nov.

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ETYMOLOGY. The species is named after Maichi, the daughter of Prof. Nguyen Trung Minh, director of VNMN.

TYPE MATERIAL. Holotype ♂ (dissected, right hind wing mounted): Vietnam: [Coll. V.N. M.N., Vietnam, Hue prov. , Bach Ma National Park, 16°12’N 107°52’E, 8.VI.2002, 1300 m, Leg. H. T. Pham] ( VNMN). GoogleMaps

DIAGNOSIS. The species is easily separated from (1) O. ( Eupharos) tamdaoina by the apical spinose process of the tegmina (absent in tamdaoina ) and by veins Sc and R of tegmina running separately from the basal cell (fused basally in tamdaoina ), from (2) O. ( Orthophana) spinata by the more elongate tegmina, posterior wings and head, from (3) O. ( Orthophana) bidoupensis by its yellow-brown colour (probably green in fresh specimens) (brown in bidoupensis ) and more elongate tegmina, posterior wings and head.

DESCRIPTION.

Measurements and ratios ( ♂; n = 1): LT = 15.0 mm; LTg/BTg = 2.30; LV/BV = 1.47; LF/BF = 1.16.

Head: yellow-brown. Frons and vertex deeply concave, not separated by a carina, elongate with lateral margins carinate ( Fig. 1 View Fig 1 A-C). Head elongate, roundly projecting anteriorly in lateral view with antero-ventral angle; genae before eye as long as breadth of eye ( Fig. 1 A View Fig 1 ). Posterior margin of vertex concave and slightly carinate ( Fig. 1 C View Fig 1 ). Lateral carinae of frons slightly projecting laterally then curved internally in obtuse angle before clypeus ( Fig. 1 B View Fig 1 ). Fronto-clypeal suture transverse, deeply grooved ( Fig. 1 B View Fig 1 ). Clypeus strongly convex, not carinate, much longer than broad ( Fig. 1 B View Fig 1 ). Scape ring-shaped; pedicel subcylindrical, about 1.5 times longer than broad ( Fig. 1 B View Fig 1 ).

Thorax: pronotum yellow-brown, smooth with anterior margin strongly curved and posterior margin straight ( Fig. 1 A, C View Fig 1 ). Paradiscal fields of pronotum wide behind eyes ( Fig. 1 A, C View Fig 1 ). Paranotal lobes of pronotum elongate and broad, without carina ( Fig. 1 A View Fig 1 ). Mesonotum yellow-brown with slight median groove; lateral carinae rather straight ( Fig. 1 C View Fig 1 ).

Tegmina: crescent-shaped without hypocostal plate, yellow brown with some minute yellow spots. Costal margin broadly rounded on basal half, obliquely straight nearly to apex and rounded subapically in lateral view ( Fig. 1 A View Fig 1 ); sutural margin straight on basal ¾, obliquely elevated on apical ¼ ( Fig. 1 A View Fig 1 ). Apex with tooth-shaped spine formed by fusion of veins CuA 1+2 and MP 1+2 ( Fig. 1 A, C View Fig 1 ). Costal area broad ( Fig. 1 A View Fig 1 ). Clavus slightly surpassing 2/3 of tegmen length, closed ( Fig. 1 A, C View Fig 1 ).

Venation: ( Fig. 1 A, C View Fig 1 ) C visible to slightly further than half of tegmen length, densely furcate; ScP and R running separately from basal cell, simple, subparallel; MP furcate at basal third into MP 1+2 and MP 3+4 not subdivised latter, running in parallel; CuA furcate after half of tegmen; CuA 2 fused with costal margin after clavus and merging with CuA 1 before apex; PCu and A 1 fused at half of clavus.

Hind wings: ( Fig. 1 D View Fig 1 ) pale yellow, slightly infuscate medially. Well developed, bilobed apically. Costal margin concave with coupling lobe at middle. Veins slightly darker; veins black on apical half of anal area.

Venation ( Fig. 1 D View Fig 1 ): ScR forked at wing coupling apparatus level; RA and RP single; MP forked in single M 1+2 and M 3+4; CuA single almost straight; CuP single, anterobasally concave then subparallel to CuA; Pcu probably single, A 1 and A 2 bifurcate after middle line.

Legs: ( Fig. 1 A, C View Fig 1 ) elongate and slender. All tibiae with strong longitudinal carinae. Metatibiae with one anteapical lateral spine and 8-9 apical spines. Metatarsomeres with long setae ventrally; first and second with 2 strong lateral spines, first longer than second and with 10 small ventral spines arranged in arc ventrally. Metatibiotarsal formula: 1+8-9/10/0.

Genitalia ♂: pygofer higher than long in lateral view, with anterior and posterior margins sinuate; posterodorsal angle rounded ( Fig. 2 A View Fig ). Anal tube elongate, lanceolate with apical margin truncate in dorsal view ( Fig. 2 B View Fig ); 2.5 times longer than broad with maximum breadth at basal 1/ 3 in dorsal view ( Fig. 2 B View Fig ); dorsoventrally flattened on apical 1/3 after anal opening; lateral margins strongly produced ventrally into broadly rounded lobe ( Fig. 2 A View Fig ). Gonostyli ( Fig. 2 A View Fig ) elongate and rather narrow in lateral view, rounded apically and with strong process before apex projecting dorso-internally on dorsal margin; ventral margin slightly excavate after middle; dorsal process slightly twisted internally. Aedeagus strongly curved in lateral view, with a series of simple, elongate, apically pointed and narrow processes directed posterodorsally ( Fig. 2 C View Fig ). Periandrium deeply notched posteriorly ( Fig. 2 D View Fig ), forming a pair of dorsoventrally depressed processes ( Fig. 2 View Fig C-D); shorter pair of laterodorsal processes with basal laminate process directed dorsoanteriorly and with apical margin truncate ( Fig. 2 C View Fig ). Phallus membranous medially and with pair of sclerified processes between processes of periandrium ( Fig. 2 View Fig C-D).

BIOLOGY. The holotype was collected in moist evergreen mountain forest ( 1300 m asl.). DISTRIBUTION. Currently recorded from a single place in Central Vietnam ( Fig. 6 View Fig ) .