Podozamites

Podozamites is an extinct genus of Permian (Kungurian) to Mesozoic conifers. In its broader sense, it has been used as a form taxon to refer to any broad leaved multi-veined conifer leaves, some of which probably belong to extant conifer groups including Araucariaceae. In a more narrow sense, it has been used to refer to a probably monophyletic group of broad leafed conifers that existed in the Northern Hemisphere, particularly East Asia and Siberia during the Late Triassic to early Late Cretaceous, where it formed part of wet coal swamp communities. Over the course of the Jurassic, the distribution shifted northwards in response to the drying of the lower latitudes, becoming restricted to between 60 and 30 degrees north by the Early Cretaceous.

Podozamites
Temporal range: Kungurian-Maastrichtian
~279–71 Ma
Mid Jurassic Podozamites, part of the Jehol Biota of China
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Division: Pinophyta
Class: Pinopsida
Order: †Voltziales
Family: †Krassiloviaceae
Genus: †Podozamites
Braun 1843
Reconstruction of Podozamities harrisii with the associated cones of Krassilovia mongolica from the Early Cretaceous of Mongolia

Podozamites senus stricto would become extinct during the Turonian stage of the Late Cretaceous, coincident with the arrival of flowering plants into the Siberian region.[1]

Description

Podozamites leaves are thought to have been regularly shed. Podozamites leaves sensu stricto are associated with conifer cones of the genera Swedenborgia, Cycadocarpidium, and Krassilovia, and were suggested in 2020 to constitute the distinct family Krassiloviaceae within the Voltziales.[2]

References
  1. Pole, Mike; Wang, Yongdong; Bugdaeva, Eugenia V.; Dong, Chong; Tian, Ning; Li, Liqin; Zhou, Ning (December 2016). "The rise and demise of Podozamites in east Asia—An extinct conifer life style". Palaeogeography, Palaeoclimatology, Palaeoecology. 464: 97–109. Bibcode:2016PPP...464...97P. doi:10.1016/j.palaeo.2016.02.037.
  2. Herrera, Fabiany; Shi, Gongle; Mays, Chris; Ichinnorov, Niiden; Takahashi, Masamichi; Bevitt, Joseph J.; Herendeen, Patrick S.; Crane, Peter R. (2020-01-15). Peppe, Daniel (ed.). "Reconstructing Krassilovia mongolica supports recognition of a new and unusual group of Mesozoic conifers". PLOS ONE. 15 (1): e0226779. Bibcode:2020PLoSO..1526779H. doi:10.1371/journal.pone.0226779. ISSN 1932-6203. PMC 6961850. PMID 31940374.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.