Zygadenia
Extinct genus of beetles
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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]
| Zygadenia Temporal range: | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Clade: | Pancrustacea |
| Class: | Insecta |
| Order: | Coleoptera |
| Suborder: | Archostemata |
| Family: | incertae sedis |
| Genus: | †Zygadenia Handlirsch, 1906 |
| Synonyms | |
|
Kakoselia Handlirsch, 1906 | |
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
Hettangian-Sinemurian (201.4 Ma to 192.9 Ma)
- Z. dachaidanensis Song et al., 2024
- Z. haixiensis Song et al., 2024
Sinemurian-Toarcian (199.5 Ma to 174.1 Ma)
- Cattamarra Coal Measures, Australia[6]
- 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[7]
- Z. cornigera Lee et al., 2023
Notes
- These are body fossils treated as Zygadenia sensu lato following Kirejtshuk (2020), with Notocupes treated as a synonym.
