TABLE 1. Body measurements of †Ademosynidae. All dimensions given in millimetres.
| Species | Dolichosyne confragosa Ponomarenko, 1969 |
D. rostrata Ponomarenko, 1969 |
D. sulcata Ponomarenko, 1969 |
Gnathosyne akkolkensis Ponomarenko, 1969 |
Ademosyne kirgizica Ponomarenko, 1969 |
A. bacca Ponomarenko, 1969 |
A. ellyptica Ponomarenko, 1969 |
Cephalosyne capitata Ponomarenko, 1969 |
|
| Specimen number | PIN 2785-2675 | PIN 2070-1551 | PIN 2555/1735 | PIN 2240-274 | PIN 2496/7 | PIN 2096/1369 | PIN 2240/310 | PIN 2240/224 | PIN 2240/302 |
| Body | |||||||||
| length | 10 | 10,4 | 5,6 | 6,7 | 4,5 | 6,2 | 3,8 | 4,2 | 5,4 |
| width | 3,5 | 3,8 | 1,6 | 1,8 | 1,7 | 2,6 | 3 | 2,1 | 2,5 |
| Elytron | |||||||||
| length | 7,8 | 7,1 | 3,1 | 4,8 | 2,9 | 5,2 | ~ | ~ | 3,8 |
| width | 1,8 | 2,1 | 0,85 | 0,9 | ~ | 1,2 | ~ | ~ | 1 |
| Head | |||||||||
| length | ~ | 1,7 | 1,1 | 0,9 | 0,8 | ~ | ~ | ~ | ~ |
| width | ~ | 1,6 | 0,75 | 0,9 | 0,7 | ~ | ~ | ~ | ~ |
| Pronotum | |||||||||
| length | 2 | 2,7 | 1,1 | 1,1 | 0,9 | 1,3 | 0,7 | 0,8 | 0,7 |
| width | 2,4 | 2,6 | 1,4 | 1,6 | 1,2 | 1,7 | 2 | 2 | 1,8 |
| Abdomen | |||||||||
| length | ~ | ~ | 2 | 3,2 | 1,3 | 2,1 | 1,5 | 1,4 | 2,3 |
| width | ~ | ~ | ~ | 1,6 | 1,4 | 2,1 | 2,3 | 1,8 | 2,1 |
| Foreleg length | |||||||||
| femur | ~ | ~ | ~ | ~ | 0,7 | ~ | ~ | ~ | ~ |
| tibia | ~ | ~ | ~ | ~ | 0,6 | ~ | ~ | ~ | ~ |
| tarsus | ~ | ~ | ~ | ~ | 0,4 | ~ | ~ | ~ | ~ |
| Middle leg length | |||||||||
| femur | ~ | ~ | ~ | ~ | 0,7 | ~ | ~ | ~ | ~ |
| tibia | ~ | ~ | ~ | ~ | 0,7 | ~ | ~ | ~ | ~ |
| tarsus | ~ | ~ | ~ | 0,1 | ~ | ~ | ~ | ~ | |
| Hind leg length | |||||||||
| femur | ~ | ~ | ~ | ~ | 0,6 | ~ | ~ | ~ | 0,9 |
| tibia | ~ | ~ | ~ | ~ | ~ | ~ | ~ | ~ | 0,7 |
| tarsus | ~ | ~ | ~ | ~ | ~ | ~ | ~ | ~ | ~ |
TABLE 2. Genera of †Ademosynidae.
| 1. Prosternal intercoxal process parallel-sided, or widening apically, often with lateral tongue-like projections at its apex; elongate-oval beetles, body length exceeds maximum width 2,5-3 times (except some Ademosyne) | 2 | |
| - Intercoxal process acute, narrowing posteriorly; transverse, stout beetles, body at most two times as long as maximum width. Mesocoxae widely separated by anterior process of metaventrite; metanepisterna with thick median longitudinal ridge | Cephalosyne Ponomarenko, 1969 | |
| 2. Anterior prosternal margin almost straight, very slightly concave; metacoxae three times as wide as long, not narrowing laterally | Gnathosyne Ponomarenko, 1977 | |
| - Anterior prosternal margin distinctly curved; metacoxae narrowing laterally | 3 | |
| 3. Anterior margin of metanepisterna straight; anterior process of metaventrite elevated | Petrosyne Ponomarenko, 1969 | |
| - Outer angles of metanepisterna protruding forward; anterior process of metaventrite not elevated | 4 | |
| 4. Head hypognathous, less than half as wide as posterior pronotal margin. Body strongly convex, almost as long as wide | Sphaerosyne, Ponomarenko, 1969 | |
| - Head prognathous, less than twice as narrow as basal margin of pronotum; body elongated | 5 | |
| 5. Protrochantins more or less rectangular, length and width equal; apex of prosternal intercoxal process usually with lateral protrusions (if not, then mandibles with distinctly curved apices and pronotum with median longitudinal depression); metacoxal width two times exceeding length, coxae with maximum length medially | Dolichosyne Ponomarenko, 1969 | |
| - Protrochantins transverse, more than three times as wide as long; metacoxal width more than four times exceeding length, coxae weakly narrowing laterally | Ademosyne Ponomarenko, 1969 | |
