Hydraena, FROM
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publication ID |
https://doi.org/ 10.5281/zenodo.5351598 |
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persistent identifier |
https://treatment.plazi.org/id/03AF8781-EA2C-292E-CF01-B8A51F2EDB64 |
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treatment provided by |
Tatiana |
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scientific name |
Hydraena |
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KEY TO THE SPECIES OF HYDRAENA FROM View in CoL SINGAPORE
1. Punctures of dorsal surface, especially pronotum and elytra small and shallow, elytal interstices not convex ( Figs. 1, 3, 4 View Figs ). Body length: 1.05–1.50 mm ...................................................2
– Punctures of dorsal surface, especially pronotum and elytra, moderately large, dense and well impressed, elytral interstices convex ( Fig. 2 View Figs ). Body length: 1.25–1.50 mm ........................4
2. Mesoventral process ( Fig.12 View Figs ) wider than mesotibia.Metaventral plaques present or absent. Body length: 1.05–1.50 mm ........3
– Mesoventral process ( Fig. 13 View Figs ) not wider than mesotibia. Metaventral plaques absent. Body length: 1.05–1.25 mm ....... ...................................................................... H. singaporensis View in CoL
3. Middle of pronotum darkened (except for teneral specimens). Metaventral plaques present, distinctly convergent anteriorly ( Fig. 12 View Figs ). Male: foretibia slightly curved, not dilated, with subapical denticle on mesal face. Female tergite X and gonocoxite ( Fig. 6e, f View Fig ) more transverse, laterally more rounded. Body length: 1.25–1.50 mm ............................... H. hendrichi View in CoL
– Middle of pronotum not darkened. Metaventral plaques absent. Male: foretibia not curved, dilated (lateral view), without denticle. Female tergite X and gonocoxite ( Fig. 7e, f View Fig ) less transverse, laterally less rounded, apically subacuminate. Body length: 1.05–1.20 mm ................................................ H. yangae View in CoL
4. Male: Metaventral plaques thin, carinate ( Fig. 14 View Figs ). Aedeagi as in Figs. 8a–c View Fig or 9a–c. Female: Abdominal sternite VIII produced apically (see Jäch & Díaz, 1999: Fig. 7d View Fig ) or gonocoxite small, subquadrate ( Fig. 9f View Fig ).................................5
– Male: Metaventral plaques unmodified. Aedeagi as in Figs. 10a–c View Fig or 11a–c. Female: Abdominal sternite VIII apically never produced; gonocoxite transverse, lateral margin distinctly convex subbasally ( Figs. 10e View Fig , 11e View Fig )........................6
5. Maxillary palpi never darkened subapically. Aedeagus Yshaped ( Fig. 8a–c View Fig ). Female: Abdominal sternite VIII produced apically (see Jäch & Díaz, 1999: Fig. 7d View Fig ) .. H. michaelbalkei View in CoL
– Maxillary palpi usually slightly darkened subapically. Aedeagus not Y-shaped (see Fig. 9a–c View Fig ). Female: Abdominal sternite VIII not produced apically........................ H. formula View in CoL
6. Male foretibia slightly curved, without denticle. Aedeagus as in Fig. 10a–c View Fig , ventral margin of main piece with conspicuous denticle near insertion of left paramere; apex of main piece not wide in ventral view. Female tergite X ( Fig. 10f View Fig ) less transverse. Gonocoxite ( Fig. 10e View Fig ) more transverse.................. .............................................................................. H. jacobsoni View in CoL
– Male foretibia not curved, provided with very small denticle on mesal face near apical 0.3. Aedeagus as in Fig. 11a–c View Fig , ventral margin of main piece without conspicuous denticle; apex of main piece very wide in ventral view. Female tergite X ( Fig. 11f View Fig ) more transverse. Gonocoxite ( Fig. 11e View Fig ) less transverse ...................................................... H. paulmoritz View in CoL
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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