Liriodendrites

Liriodendrites is an extinct genus of plants, known from fossil leaves. These have a forked apex (bifurcate), like those of extant species of Liriodendron.^[1] They have been interpreted as transitional between the leaves of the extinct genus Liriophyllum and Liriodendron.^[2] The genus has been placed in the family Magnoliaceae.^[3] Five species are known: L. aeternus,^[1] L. bradacii,^[4] L. laramiense,^[5] L. occidentalis^[1] and L. sachalinensis.^[1] It has been discovered in the United States (Hell Creek Formation), Egypt (Bahariya Formation) and Russia (Sakhalin and Siberia).

Liriodendrites Temporal range: Late Cretaceous–Paleocene PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Magnoliids
Order:	Magnoliales
Family:	Magnoliaceae
Genus:	†Liriodendrites Johnson (1996)
Species
†L. aeternus Alekseev, 2010 †L. bradacii Johnson, 1996 (type species) †L. laramiense Johnson, 1996 (Kirk, 1989) †L. occidentalis Alekseev, 2010 †L. sachalinensis Aleskeev, 2010

References

1. Alekseev, P. I. (2010). "Genus Liriodendrites in Cretaceous and early Paleogene floras of Northern Asia". Paleontological Journal. 43 (10): 1181–1189. doi:10.1134/S0031030109100013. ISSN 0031-0301. S2CID 140692794.
2. Romanov, Mikhail S. & Dilcher, David L (2013). "Fruit structure in Magnoliaceae s.l. and Archaeanthus and their relationships". American Journal of Botany. 100 (8): 1494–1508. doi:10.3732/ajb.1300035. PMID 23942087.
3. Donovan, Michael P.; Wilf, Peter; Labandeira, Conrad C.; Johnson, Kirk R.; Peppe, Daniel J. (2014-07-24). "Novel Insect Leaf-Mining after the End-Cretaceous Extinction and the Demise of Cretaceous Leaf Miners, Great Plains, USA". PLOS ONE. 9 (7): e103542. Bibcode:2014PLoSO...9j3542D. doi:10.1371/journal.pone.0103542. PMC 4110055. PMID 25058404.
4. Johnson, Kirk R. (1996). Description of seven common fossil leaf species from the Hell Creek Formation (Upper Cretaceous: Upper Maastrichtian), North Dakota, South Dakota, and Montana. Proceedings of the Denver Museum of Natural History. ser. 3 (12): 47 pp.
5. Kirk R. Johnson; See: Johnson, Kirk R. (1989). A high-resolution megafloral biostratigraphy spanning the Cretaceous-Tertiary boundary in the northern Great Plains. Ph.D Dissertation. Yale University, New Haven. [Volume=I-II.].; Note: "Primary type" of HC166