APPENDIX 1.
A key to the species of Cacomorphocerus
(1) Antennae strongly modified with antennomeres 3-9 saucer-shaped ...2
- Antennae slightly modified with antennomeres 6-7 dilated ...C. eocenicus sp. nov.
(2) Pronotum with impression or incision ...3
- Pronotum without impressions and incisions ...4
(3) Pronotum with longitudinal impression ...C. cerambyx
- Pronotum with deep transversal and sinuous incision medially ...C. madseni
(4) Pronotum anteriorly rounded and protruding ...C. bentifabrici
- Pronotum not anteriorly protruding ...5
(5) Pronotum rectangular with two oblong tubercles on disc ...C. jantaricus
- Pronotum sub-rectangular without tubercles on disc ...C. wiszniewskii
