Hypericum antiquum
| Hypericum antiquum Temporal range:
| |
|---|---|
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Malpighiales |
| Family: | Hypericaceae |
| Genus: | Hypericum |
| Species: | †H. antiquum
|
| Binomial name | |
| †Hypericum antiquum Balueva & Nikitin (2005)
| |
Hypericum antiquum is an extinct species of the genus Hypericum that was present during the Eocene epoch. The species' fossils are the oldest collected of Hypericum, and it is believed that the species is the common ancestor of the tribe Hypericeae.[1] Fossil seeds have been found in Russia, and the predicted paleoregion of the species stretched across Eurasia.[2] It is theorized that one factor leading to the species' extinction is a global cooling at the end of the Eocene that removed much of its habitat.[3]
Description
Because the only recovered fossils of the species are seeds, the only description available is of said seeds. The collected seeds were approximately 0.5 long by 0.3 mm wide in size and black in color.
Distribution
Fossils of seeds were collected in the Novosibirsk Oblast of Russia from a borehole at a depth of 250 meters.[7]
Taxonomy
Hypericum antiquum was first described in 2005 in the Russian journal Iskopaemye Tsvetkovye Rastenija Rossii I Sopredel'nykh Gosudarstv (Fossil Flowering Plants of Russia and Adjacent States) by T.A Balueva and Ivan Nikitin.
References
- ^ Meseguer et al. 2015, p. 220.
- ^ a b "Hypericum antiquum". www.fossilplants.info. Retrieved 8 May 2019.
- ^ Meseguer et al. 2015, p. 104.
- ^ Meseguer et al. 2015, pp. 217–218.
- ^ Meseguer & Sanmartín 2012.
- ^ Arbuzova & Takhtajan 2005, p. 43.
- ^ Meseguer & Sanmartín 2012, p. 101.
- ^ Arbuzova & Takhtajan 2005.
- ^ Meseguer et al. 2015, p. 218.
Bibliography
- Arbuzova, O.N.; Takhtajan, A.L. (2005). "Hypericum
L.Vidy, ustanovlennye po semenam". Iskopaemye Tsvetkovye Rastenija Rossii I Sopredel'nykh Gosudarstv (Fossil Flowering Plants of Russia and Adjacent States) (in Russian). 4. Saint Petersburg: 43–47 – via International Fossil Plant Names Index. - Meseguer, Andrea S.; Sanmartín, Isabel (2012). "Paleobiology of the genus Hypericum (Hypericaceae): a survey of the fossil record and its palaeogeographic implications". ISSN 1988-3196.
- Meseguer, Andrea S.; Lobo, Jorge M.; Ree, Richard; Beerling, David J.; Sanmartín, Isabel (2015). "Integrating Fossils, Phylogenies, and Niche Models into Biogeography to Reveal Ancient Evolutionary History: The Case of Hypericum (Hypericaceae)". PMID 25398444.