Zygadenia

Zygadenia Temporal range: Sinemurian–Albian PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Coleoptera
Suborder:	Archostemata
Family:	incertae sedis
Genus:	†Zygadenia Handlirsch, 1906
Synonyms
Kakoselia Handlirsch, 1906

Zygadenia is an extinct genus of archostematan beetles from the Early Jurassic to Early Cretaceous. It is considered to be a senior synonym of Notocupes by Kirejtshuk (2020),[1] but other researchers suggest to reserve the genus Zygadenia as a form taxon for isolated elytra that probably belong to the genus Notocupes, while retaining Notocupes as a valid genus for complete body fossils.[2][3][4]

Eleven species are included in the genus, after Strelnikova and Yan (2021, 2023).[2][3] Kirejtshuk (2020) notes that the two Lower Jurassic Australian species Z. westraliensis and Z. martinae possibly merit placement in their own separate genus.[1]

Jurassic species

Sinemurian-Toarcian (199.5 Ma to 174.1 Ma)

Cattamarra Coal Measures, Australia[5]

• Z. martinae Jarzembowski et al., 2015
• Z. westraliensis Riek, 1968

Tithonian (152.1 Ma To 145.0 Ma)

Shar Teeg, Mongolia

• Z. giebeli Ponomarenko, 2014
• Z. handlirschi Ponomarenko, 2014

Cretaceous species

Berriasian (145.0 Ma To 139.8 Ma)

Lulworth Formation, United Kingdom

• Z. angliae (Giebel, 1856)
• Z. tuberculata (Giebel, 1856)

Hauterivian (132.9 Ma to 129.4 Ma)

Weald Clay, United Kingdom

• Z. angliae (Giebel 1856)
• Z. floodpagei Jarzembowski et al., 2015
• Z. simpsoni Jarzembowski et al., 2015

Barremian (129.4 Ma to 125.0 Ma)

Sinuiju Formation, North Korea

• Z. liui Jarzembowski et al., 2015

Weald Clay, United Kingdom

• Z. angliae (Giebel, 1856)
• Z. floodpagei Jarzembowski et al., 2015
• Z. tuberculata (Giebel, 1856)
• Z. simpsoni Jarzembowski et al., 2015

Aptian (125.0 to ~113.0 Ma)

Argun Formation, Russia

• Z. sinitzae Ponomarenko, 2000

Sinuiju Formation, North Korea

• Z. liui Jarzembowski et al., 2015

Yixian Formation, China

• Z. liui Jarzembowski et al., 2015

Zaza Formation, Buryatia, Russia

• Z. alexrasnitsyni Strelnikova & Yan, 2021

Albian (113.0 Ma to 100.5 Ma)

Jinju Formation, South Korea[6]

• Z. cornigera Lee et al., 2023

References

1. Kirejtshuk, Alexander G. (2020). "Taxonomic Review of Fossil Coleopterous Families (Insecta, Coleoptera). Suborder Archostemata: Superfamilies Coleopseoidea and Cupedoidea". Geosciences. 10 (2): 73. Bibcode:2020Geosc..10...73K. doi:10.3390/geosciences10020073. ISSN 2076-3263.
2. Strelnikova, O.D.; Yan, E.V. (2021). "Redescriptions of beetles of the Notocupes generic complex (Coleoptera: Archostemata: Ommatidae) from the Lower Cretaceous of Buryatia". Palaeoentomology. 4 (5): 499–514. doi:10.11646/palaeoentomology.4.5.15. S2CID 240527664.
3. Strelnikova, O.D.; Yan, E.V. (2023). "Redescriptions of the Triassic Notocupes beetles (Archostemata: Ommatidae) from Kyrgyzstan and South Kazakhstan". Palaeoentomology. 6 (2): 174–190. doi:10.11646/palaeoentomology.6.2.9. S2CID 258403180.
4. Soo Bin Lee; Gi Soo Nam; Yan-Da Li (2022). "A new species of Notocupes (Coleoptera: Archostemata) from the Lower Cretaceous (Albian) Jinju Formation in South Korea". Cretaceous Research. 140: 105357. Bibcode:2022CrRes.14005357L. doi:10.1016/j.cretres.2022.105357. S2CID 252147645.
5. Jarzembowski, Edmund A.; Wang, Bo; Zhang, Haichun; Fang, Yan (January 2015). "Boring beetles are not necessarily dull: New notocupedins (Insecta: Coleoptera) from the Mesozoic of Eurasia and East Gondwana". Cretaceous Research. 52: 431–439. doi:10.1016/j.cretres.2014.03.006. ISSN 0195-6671.
6. Lee, S.B.; Nam, G.S.; Park, J.K.; Lee, B.H.; Li, Y.-D. (2023). "Cretaceous beetles of the Jinju Formation (Coleoptera): Archostemata". Palaeoentomology. 6 (5): 496–506. doi:10.11646/PALAEOENTOMOLOGY.6.5.8. S2CID 264597717.