APPENDIX 1.
Simplified key to genera of Endomychidae and Anamorphidae from Eocene Amber (the key includes genera with known, formally described species).
| 1. | Antenna composed of 5 antennomeres with terminal antennomere enlarged; body 3.1 mm long; (Baltic and Bitterfeld amber) | Trochoideus Westwood |
| - Antenna composed of 10 or 11 antennomeres with loose club composed of 3 antennomeres | 2 | |
| 2. | Antennomere 9 enlarged; body 2.25 mm long; (Baltic amber) | Phymaphoroides Motschulsky |
| - Antenomere 9 as wide as antennomere 10 or narrower | 3 | |
| 3. | Pronotum without sulci; dorsum convex, without vestiture; elytra punctate-striate; body 3.4 mm long; (Baltic amber) | Gramboale gen. nov. Alekseev and Tomaszewska |
| - Pronotum with lateral and/or basal sulci | 4 | |
| 4. | Tarsi pseudotrimerous (segments 1-2 lobed, tarsomere 3 minute, tarsomere 4 longest); basal sulcus with paired tubercles; [body elongate, 3.0 mm long]; (Baltic amber) | Laima gen. nov. Alekseev and Tomaszewska |
| - Tarsi simple, with cylindrical segments; basal sulci without tubercles | 5 | |
| 5. | Body round-oval, with distinct pubescence | 6 |
| - Body elongate, with fine or indistinct pubescence | 8 | |
| 6. | Elytral punctation irregular; body length 1.6 mm; (Baltic amber) | Palaecoryphus gen. nov. Alekseev and Tomaszewska |
| - Elytral punctation arranged in regular rows | 7 | |
| 7. | Tarsal formula 4-4-4; claws simple; body length 1.7 mm; (Baltic amber) | Giltine gen. nov. Alekseev and Tomaszewska |
| - Tarsal formula 3-3-4; claws appendiculate; body length 1.45 mm; (Bitterfeld amber) | Kleinzaches gen. nov. Alekseev and Tomaszewska | |
| 8. | Elytra with distinct subsutural stria curved near the scutellum; body length 1.6 mm; (Baltic amber) | Symbiotes Redtenbacher |
| - Elytra without distinct subsutural stria | 9 | |
| 9. | Elytra with irregular rows of punctures; pronotum with deep sulci; body length 2.1-2.5 mm; (Baltic amber) | Glesirhanis Shockley and Alekseev |
| - Elytra finely and irregularly punctate; pronotum with weak sulci; body length 1.2 mm; (French amber) | Palaeoestes Kirejtshuk and Nel |
Comment. Among Tertiary amber genera (and species) of handsome fungus beetles, only Discolomopsis dominicana (Anamorphidae) from mid-Miocene Dominican amber (not included in the key) is known/ described from outside Eocene European amber.
