Dactylissus armillarius Gnezdilov et Soulier-Perkins

Gnezdilov, Vladimir M., Thierry, Bourgoin & Soulier-Perkins, Adeline, 2014, Vietnamese Issidae (Hemiptera, Fulgoroidea): new taxa, new records and new distribution data, Zootaxa 3847 (1) : -

Dactylissus armillarius Gnezdilov et Soulier-Perkins sp. n.

FigS 10-21 , 26-33

Type material. Holotype, ♂, Vietnam, Khanh Hoa Province, Hòn Bà massif, 12°6.961΄N, 108°58.734΄E, 13.XI. 2013, 850 m, sweeping, Th. Bourgoin leg., “Mission Hòn Bà MNHN 2013” ( MNHN). Paratypes: Vietnam, Khanh Hoa Province, Hòn Bà massif: 3♂, 3♀, same as holotype (2♂, 3♀— MNHN, 1♂ — ZIN); 1♂, 4♀, 12°6.961’N 108°58.734’E, 872 m, 18.XI.2013, sweeping, “collecte à vue et filet”, A. Soulier-Perkins leg. (1♂, 3♀— MNHN, 1♀— ZIN); 1♀, 12°6.773΄N 108°58.379΄E, 78 m, 17.XI.2013, “collecte à vue et filet”, A. Soulier- Perkins leg. ( MNHN).

Description. General coloration brown or dark brown including hind wings ( Figs 26–33 ). Head laterally light brown greenish. Metope (face) brown with two yellow markings medially besides of median carina and 2 yellow markings above the metopoclypeal suture ( Figs 28 , 31 ). Paranotal lobes of pronotum brown greenish each with large black spot. Legs light brown. Spines black. Abdominal sternites may have lateral yellow patches.

Male. Postclypeus sometimes brown greenish. Fore wings with brown reddish longitudinal veins and dark brown or black cells often with transverse yellow oringe band crossing medially clavus and reaching anterior branch of median vein ( Figs 26, 27, 29 ). Sometimes face brown with yellow markins poorly visible or fore wings brown without bands but with transverse veins light yellow.

Female. Fore wings dark brown with brown reddish main longitudinal veins and yellowish secondary veins ( Figs 30, 32 ).

Male genitalia ( Figs 15–21 ). Anal tube elongate, 2.5 times as long as wide, rounded apically (in dorsal view). Anal column long, ¼ of the anal tube length ( Fig. 21 ). Pygofer with convex medially hind margin and protruding caudo-dorsal angle (in lateral view) ( Fig. 20 ). Style is massive with caudo-dorsal angle widely rounded ( Fig. 18 ); capitulum on short neck, narrow apically (in dorsal view) ( Fig. 19 ); apical tooth weak, lateral tooth well developed. Phallobase arc-shaped (in lateral view). Dorso-lateral phallobase lobes with pair of large triangular subapical lateral process ( Fig. 16 ), pair of long and narrow hook-shaped ventral process arising below the triangular ones ventrally, spirally crossed on the dorsal side of phallobase, and coming directed apically again on its ventral side ( Figs 15, 17 ), and with two pairs of wide basal processes fixing the hook-shaped ones ( Fig. 16 ). Hook-shaped processes of the phallobase with denticles proximally. Ventral phallobase lobe wide, narrowing apically ( Fig. 15 ). Aedeagus with no ventral hooks. Apical processes of aedeagus long, exceeding the upper margin of phallobase, each with small subapical semicircular process.

Total length. Males—5.0– 5.3 mm. Females—5.7–6.0 mm.

Etymology. Species name is derived from Latin “armilla” (ring) referring to the peculiar spiralic hook-shaped processes of the phallobase.

Ecological note. The species mainely occurs between 700 m and 900 m and was regularly collected by sweeping the vegetation while not in a great quantity. With two other yet undescribed species of Hemisphaeriini, the Issidae were one of the most collected taxa (in quantity) at this altitude in the Hòn-Bà massif. Dactylissus armillarius gen. et sp. n. appeared to be restricted and characteristic to this primary wet forest biotope at the altitute of around 800 m.

Figures

FIGURES 10 – 12. Dactylissus armillarius gen. et sp. n. 10 — male, holotype, head, pro-, and mesonotum, in dorsal view; 11 — same, face; 12 — female, paratype, hind margins of VI – VII sternites.

FIGURES 13 – 14. Dactylissus armillarius gen. et sp. n., male, paratype. 13 — fore wing; 14 — hind wing.

FIGURES 15 – 21. Dactylissus armillarius gen. et sp. n., paratype, male genitalia. 15 — penis, in ventral view; 16 — penis, in lateral view; 17 — penis, in dorsal view; 18 — style, in lateral view; 19 — capitulum of style, in dorsal view; 20 — pygofer and anal tube, in lateral view; 21 — anal tube, in dorsal view.

FIGURES 26 – 29. Dactylissus armillarius gen. et sp. n., paratypes, males. 26, 27 — dorsal view; 28 — fronatl view; 29 — lateral view.

FIGURES 30 – 33. Dactylissus armillarius gen. et sp. n., paratypes, females. 30 — dorsal view; 31 — fronatl view; 32 — lateral view; 33 — ovipositor.