Ademosynidae

Ademosynidae is an extinct family of beetles, known from the Late Triassic to Early Cretaceous. There are at least six genera and 11 species in Ademosynidae. Members of the family were small oval beetles, with a length generally smaller than 1 cm. Characteristics of the family include a pronotum without anterior angles and a rounded anterior margin, and elytra with 9–12 punctate striae. The systematic position of the family within the order Coleoptera is currently uncertain: they can be considered early examples of the suborder Polyphaga, or unusual examples of Archostemata.

Genera
The family Ademosynidae is restricted to the following six genera and 11 species in Yan, Beutel and Ponomarenko (2017):
 † Ademosyne Handlirsch, 1906
 †Ademosyne bacca Ponomarenko, 1969 – Madygen Formation, Kyrgyzstan, Late Triassic (Carnian)
 †Ademosyne elliptica Ponomarenko, 1969 – Madygen Formation, Kyrgyzstan, Late Triassic (Carnian)
 †Ademosyne kirghizica Ponomarenko, 1969 – Madygen Formation, Kyrgyzstan, Late Triassic (Carnian)
 †Ademosyne major Handlirsch, 1906 – Blackstone Formation, Australia, Late Triassic (Norian)
 † Cephalosyne Ponomarenko, 1969 – Madygen Formation, Kyrgyzstan, Late Triassic (Carnian)
 †Cephalosyne capitata Ponomarenko, 1969
 † Dolichosyne Ponomarenko, 1969 – Madygen Formation, Kyrgyzstan, Late Triassic (Carnian)
 †Dolichosyne confragosa Ponomarenko, 1969
 †Dolichosyne rostrata Ponomarenko, 1969
 †Dolichosyne sulcata Ponomarenko, 1969
 † Gnathosyne Ponomarenko, 1969 – Tologoi Formation, Kazakhstan, Late Triassic (Norian)
 †Gnathosyne akkolkensis Ponomarenko, 1969
 † Petrosyne Ponomarenko, 1969 – Kyrgyzstan, Early Jurassic (Pliensbachian)
 †Petrosyne liassica Ponomarenko, 1969
 † Sphaerosyne Ponomarenko, 1969 – Zaza Formation, Russia, Early Cretaceous (Aptian)
 †Sphaerosyne globosa Ponomarenko, 1969

The following genera and species are also included in the family according to Fossilworks, but are excluded or not mentioned in Yan, Beutel and Ponomarenko (2017):
 † Atalosyne Ren, 1995 – Lushangfen Formation, China, Early Cretaceous (Aptian)
 †Atalosyne sinuolata Ren, 1995
 † Chaocoleus Ponomarenko, Yan & Huang, 2014 – Yinping Formation, China, Permian (Capitanian)
 †Chaocoleus limnebius Ponomarenko, Yan & Huang, 2014
 † Eremisyne Wang, 1998 – Xiazhuang Formation, China, Early Cretaceous (Aptian/Albian)
 †Eremisyne xiazhuangensis Wang, 1998
 † Grammositus Dunstan, 1923 (also spelled Grammositum) – Blackstone Formation, Australia, Late Triassic (Norian)
 †Grammositus bilineatus Dunstan, 1923
 †"Ademosyne" adunca Dunstan, 1923
 †"Ademosyne" arcucciae Martins-Neto and Gallego, 2006
 †"Ademosyne" australiensis Tillyard, 1916
 †"Ademosyne" brevis Dunstan, 1923
 †"Ademosyne" cameroni Tillyard, 1916
 †"Ademosyne" congener Tillyard, 1916
 †"Ademosyne" curvata Dunstan, 1923
 †"Ademosyne" elongatus Martins-Neto and Gallego, 2006
 †"Ademosyne" hexacostata Martins-Neto and Gallego, 2006
 †"Ademosyne" intermedia Dunstan, 1923
 †"Ademosyne" lata Dunstan, 1923
 †"Ademosyne" llantenesensis Brauckmann et al., 2010
 †"Ademosyne" olliffi (Handlirsch, 1906)
 †"Ademosyne" parva Dunstan, 1923
 †"Ademosyne" polyzetete Ponomarenko, 2011
 †"Ademosyne" prisca Riek, 1974
 †"Ademosyne" punctata Tillyard, 1916
 †"Ademosyne" punctuada Martins-Neto and Gallego, 2006
 †"Ademosyne" ramocostata Dunstan, 1923
 †"Ademosyne" reducta Riek, 1976
 †"Ademosyne" rosenfeldi Brauckmann et al., 2010
 †"Ademosyne" rugulosa Dunstan, 1923
 †"Ademosyne" sibirica Rohdendorf, 1961
 †"Ademosyne" speciosa Riek, 1974
 †"Ademosyne" umutu Martins-Neto and Gallego, 2009
 †"Ademosyne" vittamargina Dunstan, 1923
 †"Ademosyne" wianamattensis Tillyard, 1918

References

Permosynoidea
†
Prehistoric insect families