Palissya

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Palissya
Temporal range: Rhaetian–Aptian
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Gymnospermae
Division: Pinophyta
Class: Pinopsida
Order: Palissyales
Family: Palissyaceae
Genus: Palissya
Endlicher, 1847
Species

See text

Palissya is an extinct form genus of female (ovule-bearing) conifer cones, known from the Late Triassic (Rhaetian) to the Early Cretaceous (Aptian). The cone of Palissya is noted for its unusual catkin-like construction: Slender bracts (modified leaves) are rigidly attached in a helical pattern around a tall woody core. The adaxial (upper) surface of each bract bears two parallel rows of ovules which are encased in cup-like structures formed by scales. The seeds are thin-walled and were likely only viable for a short period of time, meaning that they were probably adapted to wind dispersal. [1] [2]

Palissya has been considered in some aspects to be similar to some Paleozoic Voltziales, as well as Taxaceae and Podocarpaceae. Most leaves assigned to the genus do not belong to the same plant as the conifer cone. Palissya specimens from the Middle Jurassic of Yorkshire are associated with Elatocladus-like leaves. Several Australasian species with fragile cones were referred to the separate genus Knezourocarpon , [2] though some were later moved back into Palissya. [1] Other related cone genera include Stachyotaxus , Metridiostrobus , and Compsostrobus , all from the Late Triassic of the Northern Hemisphere. [1] [2]

True specimens of Palissya first appeared in the Northern Hemisphere during the latest Triassic (Rhaetian) and spread to Eastern Gondwana (modern Australia, New Zealand, and Antarctica) during the Middle Jurassic. The youngest known records of Palissya in the Northern Hemisphere are from the Middle Jurassic, but Palissya persisted in Eastern Gondwana into the Early Cretaceous, with the youngest records being from the Aptian. [1]

Species

After [1]

SpeciesAuthorityCountryAge
P. hunanensisWang 2012Flag of the People's Republic of China.svg  China (Hunan) Late Triassic (Rhaetian)
P. sphenolepis(Braun 1843) Nathorst 1908 emend.

Florin 1958

Flag of Germany.svg  Germany (Franconia)

Flag of Sweden.svg  Sweden (Stabbarp)

Flag of Poland.svg  Poland [3]

Flag of Canada (Pantone).svg  Canada [3]

Late Triassic-Early Jurassic (Rhaetian-Hettangian)
P. harrisiiC.R. Hill ex

Pattemore & Rozefelds

Flag of England.svg  England (Yorkshire)Middle Jurassic (Aalenian)
P. bartrumiiEdwards 1934Flag of New Zealand.svg  New Zealand Middle Jurassic (Callovian) ?Late Jurassic (?Tithonian)
P. elegansParris et al. 1995Flag of Australia (converted).svg  Australia (Victoria)Early Cretaceous (Valanginian)
P. tillackiorumPattemore & Rozefelds, 2019Flag of Australia (converted).svg  Australia (Queensland)Early Cretaceous (Valanginian)
Palissya sp. (Koonwarra)N/AFlag of Australia (converted).svg  Australia (Victoria)Early Cretaceous (Aptian)
P. antarcticaCantrill 2000Blank flag.svg  Antarctica (Antarctic Peninsula)Early Cretaceous (Aptian)

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References

  1. 1 2 3 4 5 Pattemore, Gary A.; Rozefelds, Andrew C. (2019-12-01). "Palissya – absolutely incomprehensible or surprisingly interpretable: a new morphological model, affiliations and phylogenetic insights". Acta Palaeobotanica. 59 (2): 181–214. doi: 10.2478/acpa-2019-0015 . ISSN   2082-0259.
  2. 1 2 3 Pattemore, G.A.; Rigby, J.F.; Playford, G. (2014). "Palissya: A global review and reassessment of Eastern Gondwanan material". Review of Palaeobotany and Palynology. 210: 50–61. Bibcode:2014RPaPa.210...50P. doi:10.1016/j.revpalbo.2014.08.002.
  3. 1 2 Van Konijnenburg-Van Cittert, Johanna H.A.; Pott, Christian; Schmeißner, Stefan; Dütsch, Günter; Kustatscher, Evelyn (2021-05-01). "The Rhaetian flora of Wüstenwelsberg, Bavaria, Germany: Description of selected gymnosperms (Ginkgoales, Cycadales, Coniferales) together with an ecological assessment of the locally prevailing vegetation". Review of Palaeobotany and Palynology. 288: 104398. Bibcode:2021RPaPa.28804398V. doi: 10.1016/j.revpalbo.2021.104398 . ISSN   0034-6667.