Calvariomorphus, Ruta & Yoshitomi, 2022

Ruta, Rafał & Yoshitomi, Hiroyuki, 2022, Calvariomorphus-a new genus of marsh beetles (Coleoptera: Scirtidae) with remarkable elytral excitators, Zootaxa 5120 (1), pp. 65-82 : 79-80

A key to species of Calvariomorphus gen. nov.

1. Trigonium of penis distinctly shorter than parameroids, sternite IX with relatively wide hemisternites..................2.

-. Trigonium of penis as long as or slightly longer than parameroids, sternite IX u-shaped, with narrow lateral portions......4.

2. Outer margins of parameroids with denticles, parameres of tegmen without spines................................................................................................... C. peterseni (Klausnitzer) [female unknown]

-. Outer margin of parameroids without denticles, parameres of tegmen with spines.................. C. palauensis sp. nov.

3. Body widest in anterior half of elytra, pala as long as parameroids, females with excitators: small depressions present in apical portion of elytra..................................................................... C. malayanus sp. nov.

-. Body widest in the middle of elytra, pala distinctly shorter than parameroids, females without excitators.. .. C. sakaii sp. nov.

Check-list of Calvariomorphus gen. nov.

Calvariomorphus malayanus sp. nov. Indonesia: Riau Archipelago; Malaysia: Borneo, Malay Peninsula; Singapore

Calvariomorphus palauensis sp. nov. Palau: Babeldaob Is.

Calvariomorphus peterseni ( Klausnitzer, 1973) , comb. nov. Papua New Guinea: Dyaul Is.

Calvariomorphus sakaii sp. nov. Philippines: Mindanao Is.