Typification of the genus Zizyphoides Seward et Conway (Magnoliophyta, Trochodendraceae)

Zolina, Anastasia; Manchester, Steven R.; Golovneva, L. B.

doi:10.35535/acpa-2021-0007

Cited by 4 publications

(4 citation statements)

References 17 publications

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“…After revision of the type material of the genus Zizyphoides Seward & Conway (Zolina et al . 2021), we showed the type species, Z . colombii (Heer) Seward & Conway, to be present in the Barentsburg flora.…”

Section: Methodsmentioning

confidence: 81%

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The early Paleocene (Danian) climate of Svalbard based on palaeobotanical data

Golovneva,

Zolina,

Spicer

2023

Papers in Palaeontology

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The early Paleocene (Danian) Barentsburg flora from the Firkanten Formation, Svalbard, provides a valuable insight into the environment and climate of the Arctic early in the warm Palaeogene prior to the Paleocene–Eocene Thermal Maximum (PETM) event. The flora includes c. 50 species of ferns, ginkgos, conifers and angiosperms. Angiosperms predominate and are represented by the families Platanaceae, Cercidiphyllaceae, Trochodendraceae, Hamamelidaceae, Fagaceae, Betulaceae, Nyssaceae and several taxa of uncertain taxonomic position. Palaeoclimate parameters, calculated using a new calibration of the Climate Leaf Analysis Multivariate Program (CLAMP), indicate that Svalbard in the early Paleocene was characterized by a temperate, maritime, humid, seasonal climate with cool mild winters and warm summers. Humidity was highest during winter months. Short‐term winter snow cover and light frosts were likely to have been frequent. The CLAMP analysis yields a mean annual temperature of 10.1 ± 1.98°С, a warmest month mean temperature of 19.2 ± 2.49°C and a coldest month mean temperature of 1.7 ± 3.24°С. The growing season lasted c. 6 months. Precipitation during this growth period was 572.4 ± 296.50 mm, while vapour pressure deficit and potential evapotranspiration indicate very high humidity year‐round, with summer being only slightly drier than winter. Taken together with data from other early Paleocene circum‐Arctic sites, these results point to highly uniform, temperate and extremely humid conditions around the margins of the early Cenozoic Arctic Ocean. This condition represents the warm background condition that dominated in the Arctic prior to the anomalous extreme warmth of the early Eocene.

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Section: Methodsmentioning

confidence: 81%

“…50 species of ferns, ginkgos, conifers and angiosperms (Budantsev & Golovneva 2009; Gnilovskaya & Golovneva 2016; Golovneva & Alekseev 2017; Zolina et al . 2021). A new taxonomic list of the Barentsburg flora is presented in Table 4.…”

Section: Methodsmentioning

confidence: 99%

The early Paleocene (Danian) climate of Svalbard based on palaeobotanical data

Golovneva,

Zolina,

Spicer

2023

Papers in Palaeontology

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“…Higher order venation forming a fine reticulum with polygonal areoles. D i s c u s s i o n. These leaves correspond to the widespread species of Late Cretaceous and Paleocene species Zizyphoides flabella (Crane et al, 1991;Zolina et al, 2021). The long slender petioles (Fig.…”

Section: Zizyphoides Flabella (Newberry) Crane Manchester Et Dilchermentioning

confidence: 96%

The Paleocene Horse Creek florule, Tongue River Member of the Fort Union Formation, southeastern Montana, USA

Manchester¹,

Foster²,

Lott³

2023

Acta Palaeobot.

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We investigated leaf, cone and fruit impressions preserved in a siltstone deposit between coal seams in the late Paleocene Tongue River Member near Otter, southeast Montana, to assess the floristic diversity and composition. We document the presence of Taxodium based on seed cone scales as well as foliage branches and associated pollen cones, and a low-diversity angiosperm assemblage of about 15 genera dominated by Platanaceae (Platanus, Macginitiea, Macginistemon) and Cornales (Cornus, Davidia, Amersinia, Browniea), cf. Trochodendraceae (Zizyphoides, Nordenskioeldia), augmented by Aesculus, Trochodendroides, Ulmites and Porosia. Most of these genera were widespread in the Paleocene of the Northern Hemisphere. The low diversity of this florule is consistent with that of Tiffanian assemblages elsewhere in Montana and Wyoming. The leaf known as Phyllites demoresii Brown is proposed as a likely candidate to correspond with the extinct fruits called Porosia verrucosa (Lesquereux) Hickey emend. Manchester et Kodrul.

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“…Discussion. The type species of the genus Zizyphoides, Z. colombii (Heer) Seward et Conway, comes from the early Paleocene of the Atanikerdluk locality (the Quikavsak Formation), West Greenland (Zolina, Manchester, and Golovneva, 2021). This species has entire, undulate, crenate or irregularly dentate margin.…”

Section: Palaeon To Logymentioning

confidence: 99%

The Renardodden flora of Spitsbergen

Golovneva,

Zolina

2023

BioComm

Self Cite

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The Renardodden flora combines fossil plants from the Skilvika and Renardodden formations of the Renardodden and Scottbreen areas south of Bellsund, the Sesshøgda Formation (Prins Karls Forland) and the Sarstangen conglomerate (Sarsbukta area). We considered them as representing a single fossil flora, because floristic assemblages from these four stratigraphic units contain a large number of common species. The Renardodden flora includes approximately 30 species of conifers and angiosperms. Angiosperms predominate and are represented by the families Platanaceae, Cercidiphyllaceae, Trochodendraceae, Hamamelidaceae, Betulaceae, Cornaceae, Tiliaceae, Aceraceae, and several taxa of an uncertain taxonomic position. Monocots are represented by two aquatic plants: Haemanthophyllum nordenskioldii and Acorus spitsbergensis. A new combination Zizyphoides retusa (Heer) Golovn. et Zolina, comb. nov. is proposed. The Renardodden flora is characterized by a high endemism and has no distinct floristic connections with other arctic and boreal floras. The age of the Renardodden flora is estimated as the late Eocene.

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Typification of the genus Zizyphoides Seward et Conway (Magnoliophyta, Trochodendraceae)

Cited by 4 publications

References 17 publications

The early Paleocene (Danian) climate of Svalbard based on palaeobotanical data

The early Paleocene (Danian) climate of Svalbard based on palaeobotanical data

The Paleocene Horse Creek florule, Tongue River Member of the Fort Union Formation, southeastern Montana, USA

The Renardodden flora of Spitsbergen

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