;"D. clavareaui";"D. fukiensis" General;"Medium sized, pitchy brown, dark bronze, shiny, antennae and legs partially reddish, hind femora don’t reach the apex of the elytra, hind femora claviform with acute tooth, pronotal disc with very fine hairs, elytra glabrous" Body Shape;"Habitus like typical Donacia (Fig. 4)";"Habitus resembles Plateumaris (Fig. 1)" "Sex difference";"Males in general more slender and shorter than the females" Colour;"Dark metallic-bronze, greenish-bronze, metallic-cupreous";"Shiny bronze" "Colour of antennae and legs";"Antennae and legs partially yellow, reddish or brown, the extent of the colour is very variable within specimens" Ventral;"Ventral hairs as usual on Donacia, density variable, the colour of the hairs depends on the lighting" Size;"♂ 6.5- 8.0 mm (avg: 7.5), ♀ 8.0-9.0 mm (avg: 8.5)" Head "Antennae lenght";"Filiform, slender, almost half as long as the length of the body, in some male specimens reaching farther than the middle of the elytra" Antennomeres;"A2+A3 ≈ A1 ≈ A4 ≈ A5; A2 < A3" "The length relations of the single segments to each other are quite variable. The basal parts of the antennomeres are rufous or yellow, the apical parts are dark and sometimes metallic, the ratio between the two colour parts shows a great variation among the specimens" "Antennal tubercles";"The antennal tubercles are flattened, with a narrow groove between them" "Head disc";"Head disc straight at front with a deep middle groove" Calli;"Calli indistinct, some specimens without calli" "Frons and eyes";"Eyes wide apart, the frons width is four times the measured value of the eye width, with no difference between male and female specimens" Pronotum Surface;"Pronotum pubescent, with very fine hairs, on some specimens very difficult to be seen" Surface;"Pronotum finely and densely punctured (Fig. 5)";"Irregularly punctured, in between the punctures shiny. Often the punctures are more dense in the anterior and posterior part than in the middle part. Density of the punctures shows a great variation between individual specimens (Fig. 6, 7)" Shape;"Almost quadratic, in some male specimens slightly longer than wide, in some female specimens wider than long. Anterior margin slightly convex, anterior angles well developed, anterior tubercles rather flat, only slightly protruding" Scutellum;"Scutellum with thin and short hairs" Elytra Shape;"Typically Donacia-shaped";"Rather Plateumaris-shaped" "General features";"Approx. twice as long as wide, in most male specimens slightly longer than double width (ratio 2.1), in most female specimens slightly shorter (ratio 1.9) glabrous and shiny" Impressions;"Slightly visible only on some specimens" "Punctures and intervals";"Punctures strong and deep, intervals distincly wrinkled (Fig. 8) interval ≈ 1x – 3x puncture diameter";"Punctures very delicate, not deep, intervals only slightly wrinkled, very smooth (Fig. 9) interval ≈ 4x – 7x puncture diameter" Epipleura;"Elytral epipleura approx. as wide or wider than 10th interval (Fig. 10) Epipleuron : Interval = 1 : (>) 1";"Elytral epipleura narrower than 10th interval (Fig. 11) Epipleuron : Interval = 1 : (1.5 – 2)" Apex;"Elytral apex truncated, the external angle slightly rounded (Fig. 12)";"Elytral apex indistinctly truncated, evenly and widely rounded with very smooth outer and inner angles (Fig. 13)" Abdomen Pygidium;"Distinctly arcuately emarginate";"Truncated and slightly recessed in the middle" "Male last sternite";"Apex rectangularly truncated and triangularly impressed";"Slightly impressed at the apical ridge" "Female last sternite";"Basic contour distinctive triangular (Fig. 14)";"Basic contour convex without a distinctive peak and broadly rounded (Fig. 15)" Legs General;"Strong legs, all femora clavate, especially at the ♂, at the ♀ mostly more slender, hind femora short, even at the ♂ they don’t reach the apex of the elytra by far. Posterior femora with a prominent tooth, which is often broader at the ♂, at the ♀ more slender and more acute. Legs partly reddish, some specimens with completely red anterior tibia, some specimens with rather dark legs" "Anterior Tibia";"Anterior tibia shows a protruding tooth towards outward at the insertion of the tarsomere. D. fukiensis: Fig. 18" "D. clavareaui: Fig. 4 and https://science.mnhn.fr/institution/mnhn/collection/ec/item/ec2130?listIndex=1&listCount=6 [26.11.2018]" "It is clearly visible on most specimens, but on some indistinctly" Tarsomeres;"The 1st and 3rd tarsomere have approx. the same length, the 2nd one is by a third shorter" Aedeagus Shape;"Aedeagus very straight, outer contours in frontal view rather parallel. Median lobe distinctly protruding: Fig. 19, 20, 21";"Aedeagus more curved, thickened, narrowed towards the apex. Median lobe slightly protruding: Fig. 22, 23, 24"