Podonychus Jaech & Kodada, 1997

Yoshitomi, Hiroyuki & Hayashi, Masakazu, 2020, Unexpected discovery of a new Podonychus species in Kyushu, Japan (Coleoptera, Elmidae, Elminae, Macronychini), ZooKeys 933, pp. 107-123 : 107

Podonychus Jaech & Kodada, 1997

Type species.

Podonychus sagittarius Jäch & Kodada, 1997

Diagnosis.

The genus is very distinctive in having the following characteristics of the adults (see also Table 1 ): 1) antennae 6-segmented; 2) pronotal median groove very thin and shallow; 3) pronotal sublateral carinae absent; 4) lateral declivity of the pronotum with oblique impressions; 5) each elytron with one sublateral carina on interval VIII. The larva is also distinctive in having Y-shaped projections (Fig. 7A, E, D ) on the thorax and abdomen.

Figures

Figure 7. Larva of Podonychus gyobu sp. nov. A thorax in lateral view B ditto in ventral view C ventral sclerites of prothorax D granules on abdomen E ditto, close up F Y-shaped projection on abdomen G pectinate setae on postero-lateral corner of abdomen H spiracle on abdomen.