Malthodes, Kiesenwetter, 1852

Key of the Malthodes from the Baltic amber

1 Elytra long, covering last abdominal segment............................................................... 2

- Elytra short, leaving some abdominal segments uncovered..................................................... 3

2 Last sternite elongate in the form of a long lamina divided posteriorly in two lobes, last tergite short and lob-shaped..................................................... Malthodes (Libertimalthodes) aphidiphagus Fanti & Michalski, 2018

- Last sternite very wide and roundish at sides, apically undulate with central concavity........................................................................................ Malthodes (L.) elytratus Kupryjanowicz & Fanti, 2019

3 Last urites small and little modified, elytra very short not reaching the metatibiae.......................................................................................... Malthodes (Malthodes) caenozoicus Fanti & Vitali, 2017

- Last urites well-developed.............................................................................. 4

4 Last sternite straight................................................................................... 5

- Last sternite curved.................................................................................... 8

5 Last sternite short, wide, not forked apically..................... Malthodes (M.) kotejai Kuśka & Kupryjanowicz, 2005

- Last sternite elongate, thin, apically forked................................................................. 6

6 Last tergite sub-quadrate, not forked apically............................................................... 7

- Last tergite slightly forked apically............................................ Malthodes (M.) meriae Fanti, 2018

7 Last tergite very small and short.......................... Malthodes (M.) ceranowiczae Kuśka & Kupryjanowicz, 2005

- Last tergite slightly elongate................................... Malthodes (M.) nublar Kupryjanowicz & Fanti, 2019

8 Last sternite strongly and extremely curved (U-shaped)....................................................... 9

- Last sternite slightly curved............................................................................ 10

9 Last sternite without lateral expansions, last tergite feebly curved and apically feebly forked................................................................................... Malthodes (M.) serafini Kuśka & Kupryjanowicz, 2005

- Last sternite with lateral expansions, last tergite curved and apically forked.............. Malthodes (M.) tognettii sp. nov.

10 Last tergite with the apex straight or sinuous............................................................... 11

- Last tergite elongate with rounded apex................................. Malthodes (M.) sucini Kuśka & Kania, 2010

11 Last tergite very elongate, robust, slightly folded laterally......... Malthodes (M.) josephi Fanti & M. K. Pankowski, 2018 - Last tergite short, lobed............................................................................... 12 12 Last tergite sub-quadrate/rectangular, robust and wide......................... Malthodes (M.) michalskii Fanti, 2017b - Last tergite small, slightly elongate...................................................................... 13 13 Last sternite forked apically (two lobes)......................... Malthodes (M.) moellehavei Fanti & Damgaard, 2018 - Last sternite trilobed apically.................................. Malthodes (M.) henningseni Fanti & Damgaard, 2018