Corresponding author: Hongbin Liang (
Academic editor: Stephen Venn
Four species and one subspecies of
It is not surprising for us to find some new records of
The primary purposes of this paper are to represent three new records of
The specimens examined in the present study are from these collections:
In the citations of species, the following abbreviations of collections were mentioned, but there is no specimen examination from these collections:
Habitus and aedeagus were captured by a Nikon D7200 camera with LAOWA 60 mm F2.8 2:1 Super Macro Lens. Maxillary palpi and pronota were captured by a Nikon D5500 camera with a Nikon SMZ18 stereomicroscope. Stains and dust on specimens were moderately cleared using Photoshop Elements 2022 Editor 20.0 after photographing.
Amongst the seven genera (
Habitus: Fig.
Body length = 12.2–12.6 mm. Dorsal surface largely black. Terminal maxillary palpimere cylindrical, of similar width as distal end of penultimate one, distinctly longer than penultimate one. Pronotum faintly blue, transversal round (pronotum width / pronotum length = 1.40–1.42), widest a little behind anterior third; pronotum densely and coarsely punctate between basal foveae; lateral margins hardly sinuate in front of posterior angles; posterior angles rounded and obtuse.
This species can be well distinguished from other Chinese species by the terminal maxillary palpimere cylindrical, not wider, but much longer than the penultimate one.
Xishuangbanna, the collection locality of the two specimens we examined, is quite far from South Vietnam, the type locality of
Vietnam, Laos and a new record for China (Yunnan): Fig.
Habitus: Fig.
Body length = 12.6–13.7 mm. Dorsal surface dark brown to black. Terminal maxillary palpimere cylindrical, as long as penultimate one. Pronotum black, rounded, narrower than that of the previous species (pronotum width / pronotum length = 1.24–1.29), widest near middle; pronotum completely smooth between basal foveae; lateral margins hardly sinuate in front of posterior angles; posterior angles rounded and obtuse.
This species can be well distinguished from other Chinese species by the narrower pronotum and lateral margins evenly curved, widest near middle.
Male genitalia: in lateral view, median lobe of aedeagus with ventral margin very weakly curved near middle, apical lamella nearly straight; in dorsal view, median lobe of aedeagus with both lateral margins sinuate, widest near basal third, gradually constricted near apical third, apex rounded with apical lamella very short, apical orifice opened left-dorsally.
This species was originally described from a single female. We herein provide the first record of the male of this species and provide description and illustration for the male genitalia.
Vietnam and a new record for China (Guangxi): Fig.
Habitus: Fig.
Body length = 12.8–14.6 mm. Dorsal surface black. Terminal maxillary palpimere cylindrical, as long as penultimate one. Pronotum black, widely cordate (pronotum width / pronotum length = 1.37–1.44), widest a little behind anterior third; pronotum completely smooth between basal foveae; lateral margins strongly sinuate in front of posterior angles; posterior angles rectangular with sharp apices.
This species can be well distinguished from other Chinese species by its characteristic pronotum that is strongly cordate with evident sinuation in front of posterior angles, which are sharp.
This species is somewhat similar to
Laos and a new record for China (Yunnan): Fig.
Habitus: Fig.
Body length = 11.9-14.5 mm. Dorsal surface black. Terminal maxillary palpimere elongated and ovate, much longer and wider than penultimate one. Pronotum black, widely rounded (pronotum width / pronotum length = 1.33–1.43), widest a little behind anterior third; pronotum densely punctate between basal foveae; lateral margins hardly sinuate in front of posterior angles; posterior angles obtuse.
This species can be well distinguished from other Chinese species by the terminal maxillary palpimere long-ovate, much longer and wider than the penultimate one.
Vietnam and China (Hong Kong, Hainan, Guangxi, Guangdong, Fujian, Hunan): Fig.
Habitus: Fig.
Body length = 11.7 mm. Dorsal surface black. Similar to the nominal-typical subspecies, but different in the pronotum being only sparsely punctate between basal foveae.
China (Taiwan): Fig.
1 | Pronotum more or less punctate between basal foveae; terminal maxillary palpimere much longer than penultimate one. |
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– | Pronotum completely smooth between basal foveae; terminal maxillary palpimere as long as penultimate one. |
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2 | Terminal maxillary palpimere long-ovate, distinctly wider than distal end of penultimate one. |
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– | Terminal maxillary palpimere cylindrical, not wider than distal end of penultimate one. | |
3 | Pronotum densely punctate between basal foveae, distributed in Mainland China. | |
– | Pronotum sparsely punctate between basal foveae, distributed in Taiwan, China. | |
4 | Pronotum lateral margins nearly straight before posterior angles, apex of posterior angles obtuse. | |
– | Pronotum lateral margins strongly sinuate before posterior angles, apex of posterior angles sharp. |
We wish to sincerely appreciate the following colleagues. Mr. Philippe Roux (Paris, France), Mr. Pingzhou Zhu (IZAS), Mr. Sixun Ge (BJFU) and Mr. Wenqi Yin (BJFU) gave us many crucial guides on our work. Mr. Xiaoran Yang (NEFU), together with Mr. Zhaoqi Leng (NKU), shared their photographic experiences and helped us improve our photography skills. Mr. Jiaheng Chen (NJAU) provided us with the specimen of
Habitus of
Left lateral view and dorsal view of median lobe of aedeagus of
Maxillary palpi of
Pronota of
Distribution map for