Laccobius, Erichson, 1837
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publication ID |
https://doi.org/ 10.11646/zootaxa.4963.3.11 |
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publication LSID |
lsid:zoobank.org:pub:05C2E47F-426D-42EF-B07E-D586C63B6527 |
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DOI |
https://doi.org/10.5281/zenodo.4704307 |
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persistent identifier |
https://treatment.plazi.org/id/03C29A73-FFCE-410B-FF4B-A05400B1FBEE |
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treatment provided by |
Plazi |
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scientific name |
Laccobius |
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Key to Taiwanese species of Laccobius View in CoL
1. Eyes kidney-shaped (reniform). Antenna with 7 antennomeres (subgenus Glyptolaccobius View in CoL ). Legs brown. Inhabits wet rocks ( Fig. 26 View FIGURES 23–26 ).......................................................................... L. politus Gentili, 1979 View in CoL
- Eyes rounded. Antenna with 8 antennomeres (subgenus Microlaccobius View in CoL ). Legs pale yellowish. Inhabits sides of streams or ponds or sun-exposed algal mats ( Figs. 23–25 View FIGURES 23–26 ).............................................................. 2
2. Body small (1.7–2.2 mm), elongate oval. Pronotum with a small central dark oval spot which is narrower than the width of the head ( Fig. 22 View FIGURES 19–22 )................................................................. L. roseiceps Régimbart, 1903 View in CoL
- Body larger (2.0– 2.8 mm), oval. Pronotum with much bigger dark spot, as wide as head or wider...................... 3
3. Parameres widened and membranous apically, median lobe distinctly shorter than parameres.......................... 4
- Parameres slender, bent inward in apical third, median lobe slightly shorter than parameres or as long as parameres....... 5
4. Median lobe wider, apical broadly rounded ( Fig. 15 View FIGURES 10–18 )..................................... L. formosus Gentili, 1979 View in CoL
- Median lobe narrower, apical strongly narrowing ( Fig. 18 View FIGURES 10–18 )................................. L. fragilis Nakane, 1966 View in CoL
5. Pronotum with a dark spot slightly wider that the head ( Fig. 22 View FIGURES 19–22 ). Median lobe of the aedeagus very broad, moderately narrowing apically ( Fig. 3–4 View FIGURES 1–5 ), Parameres very narrow in dorsal and ventral views ( Fig. 5 View FIGURES 1–5 ).......................... L. hoi View in CoL sp. nov.
- Pronotum almost entirely dark, with pale lateral margins ( Fig. 20 View FIGURES 19–22 ). Median lobe of the aedeagus widening in the midlength, apex subtruncate. Parameres narrow in dorsal view ( Fig. 16 View FIGURES 10–18 ).............................. L. hammondi Gentili, 1984 View in CoL
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