Viettagona, Medvedev G. S. & Merkl O., 2002
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publication ID |
https://doi.org/ 10.5281/zenodo.12587269 |
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persistent identifier |
https://treatment.plazi.org/id/C801A51F-FFD5-4853-FD69-FA3C90A57CC1 |
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treatment provided by |
Felipe |
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scientific name |
Viettagona |
| status |
gen. nov. |
Viettagona gen. n.
Type species – Viettagona vietnamensis sp. n.
Description – Anterior margin of clypeusstraight. Antennae ( Fig. 1 View Figs 1–10 ) of male with two termi - nal segments extending beyond base of pronotum if directed backwards; antennae of female with apices reaching base of pronotum. Prothorax and elytra rather strongly narrowing toward base. Elytra of female swollen. Epipleural carina smooth at base. Epipleura extending to apex of elytra. Dorsal margin of inner surface of profemur with weak rounded process apically ( Fig. 3 View Figs 1–10 ). Inner surface of all tibiae with light hair brush at apex. Apical spurs on protibia small, slightly differing in length, pointed
Acta zool. hung. 48, 2002 Hungarian Natural History Museum, Budapest apically. Pro- and mesotibiae thickened in apical half. Hair brushes present on plantar surface of protarsomeres 1 and 2 mesotarsomere 1. Other tarsal segments, except for claw segment, with a bunch or groups of pale hairs. Reservoirs of defensive glands large ( Fig. 15 View Figs 11–15 ). Parameres with rounded apical margin; in lateral view, slightly and evenly curved ( Fig. 4 View Figs 1–10 ). Middle suture on dorsal surface of parameresnot pronounced. Opening for penisprotraction situated at apex of parameres( Fig. 6 View Figs 1–10 ). Glands of aedeagal bursa very small ( Fig. 8 View Figs 1–10 ). Common shaft of spiculum ventrale wide ( Fig. 9 View Figs 1–10 ). Male abdominal ventrite 8 with short and wide gland ( Fig. 10 View Figs 1–10 ). Apical margin of lobes of ovipositor widely rounded, covered with long setae ( Figs 11, 12 View Figs 11–15 ). Spermathecal duct long and thin, 1st and 2nd reservoirs of spermatheca with common long base ( Fig. 16 View Fig ). Base of spermathecal sphincter long.
Remarks – Viettagona gen. n. belongsto a group of genera including Tagonoides FAIRMAIRE, 1886 , Gnaptorina REITTER, 1887 , Montagona G. MEDVEDEV, 1998 , Itagonia REITTER, 1887 , Sintagona G. MEDVEDEV, 1998 , Agnaptoria REITTER, 1887 , Asidoblaps FAIRMAIRE, 1886 , Blaptogonia G. MEDVEDEV, 1998 , Nepalindia G. MEDVEDEV, 1998 and Colasia KOCH, 1965 (see MEDVEDEV 1998 a, b, 2001 a). Based on ovipositor structure, three subgroups are distinguished: 1) Montagona , Tagonoides , Itagonia, Gnaptorina (ovipositorial lobes cuneate, narrowed apically – Fig. 17 View Figs 17–24 ); 2) Agnaptoria , Asidoblaps , Nepalindia and probably also Sintagona , female of which isnot known (apical margin of ovipositorial lobes obliquely truncate – Fig. 18 View Figs 17–24 ); 3) Colasia (ovipositorial lobes rounded apically – Fig. 19 View Figs 17–24 ). Viettagona is similar in the structure of the ovipositorial lobes to the genus Colasia , differing from it in the shorter and wider parameres ( Fig. 20 View Figs 17–24 ) and distribution. In addition, Colasia akisoides KOCH, 1965 differsfrom Viettagona in the absence of pale hair brushes on plantar surface of male pro- and mesotarsomeres, and in the bases of spermathecal reservoirs being separated from each other by rather long duct, bases of reservoirs and spermathecal sphincter approximate. A considerable development of pale hairs on plantar surface of tarsi differentiates Viettagona from the genera Nepalindia and Blaptogonia . In the species of the latter genera, pale hair brush is present only on male protarsomere 1. At the same time, the characters of the tarsal structure unite Viettagona with Asidoblaps and Agnaptoria . Presence of a weak rounded process on dorsal margin of inner surface of profemur and the structure of widened in apical half meso- and metatibiae reveal close affinity of Viettagona to Asidoblaps and Agnaptoria . Another support for thispoint of view isthe structure of legsand female genital tubesin the genera Agnaptoria , Asidoblaps and Viettagona . In particular, meso- and metatibiae in Viettagona are abruptly widened in apical half, like in Agnaptoria ; and 1st and 2nd reservoirs of spermatheca in Viettagona and Asidoblaps (for instance, in Asidoblaps smetanai G. MEDVEDEV, 2001 from Taiwan; see Fig. 27 View Figs 25–27 and MEDVEDEV 2001 b) form a well-developed common base. Viettagona differsfrom these genera in the following characters: apical margin of ovipositorial lobes rounded; inner surface of all tibiae covered with pale setae; parameres evenly curved in lateral
Acta zool. hung. 48, 2002
gland of sternite VIII in lateral view. A: scale to Figs 1, 3, 4–7, 9 View Figs 1–10 ; B, to Fig. 2 View Figs 1–10 , C, to Fig. 10 View Figs 1–10
Acta zool. hung. 48, 2002
Acta zool. hung. 48, 2002
view; common shaft of spiculum ventrale wide. In Asidoblaps and Agnaptoria , only pro- and mesotibiae are covered with pale setae on inner side; parameres in lateral view S-curved ( Fig. 21, 22 View Figs 17–24 ), common shaft of spiculum ventrale long and thin ( Fig. 23 View Figs 17–24 ).
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