Taxonomy and morphological diversity of infructescences Jenkinsella co-occurred with Trochodendroides leaves in the Cretaceous and Paleogene

Golovneva, L. B.; Alekseev, P. I.

doi:10.31111/palaeobotany/2017.8.92

Cited by 11 publications

(12 citation statements)

References 25 publications

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“…Fruits and seeds of the Newell's Nook flora are moderate in size, not exceeding 10 mm in length, except in Jenkinsella, which can have fruits roughly 16 mm long. Jenkinsella produces the largest fruits in this flora, but it is known to disperse small, winged seeds only a few millimeters long (Crane and DuVal, 2013;Golovneva and Alekseev, 2017). Aside from Jenkinsella fruits, the largest disseminule in the assemblage is Incertae sedis C (9.3 mm long).…”

Section: Discussion Comparison With Other Paleocene Florasmentioning

confidence: 99%

The mid-Paleocene fruit and seed flora from the Fort Union Formation of Newell’s Nook, southeastern Montana, USA

Huegele¹,

Manchester²

2022

Acta Palaeobot.

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The middle Paleocene Newell’s Nook biota of the Tongue River Member of the Fort Union Formation, southeastern Montana, is best known for its early Tiffanian mammalian fauna. Here, we describe an informative fruit and seed assemblage from this locality. These records refine the lower stratigraphic boundary for several plant genera known more widely from the Fort Union paleobotanical localities of less certain stratigraphic assignment within the upper Paleocene and help to fill a gap in our knowledge about the mid-Paleocene floristic composition of the Rocky Mountain and Great Plains region. Recognized plant taxa belong to the families Characeae, Taxaceae, Menispermaceae, Sabiaceae, Hamamelidaceae, Cercidiphyllaceae, Vitaceae, Cucurbitaceae and Juglandaceae. Several morphotypes remain uncertain as to familial position. Based on the dispersal syndromes of extant relatives, about 2/3 of these fruits were adaptive for animal dispersal, with hard seeds or endocarps covered by a fleshy outer layer. Dry seeds and nuts were likely part of the diet of small mammals. The Newell’s Nook locality presents another rare example of a North American Paleocene fruit and seed locality and provides insights to the dietary habits and ecology of the co-occurring fauna of this time.

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Section: Discussion Comparison With Other Paleocene Florasmentioning

confidence: 99%

The mid-Paleocene fruit and seed flora from the Fort Union Formation of Newell’s Nook, southeastern Montana, USA

Huegele¹,

Manchester²

2022

Acta Palaeobot.

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“…Previously, these leaves were assigned to Trochodendroides arctica (Heer) Berry. Female infructescences with follicular fruits, previously described as Nyssidium arcticum (Heer) Iljinsk., are now considered to be Jenkinsella arctica (Heer) Bell because the name Jenkinsella Reid & Chandler is the earliest appropriate generic name designated for these fruits (Golovneva & Alekseev 2017). Fruits of Nyssidium ekmanii Heer, described by Heer (1868), differ from Jenkinsella in being half the size and without evidence of a follicular nature.…”

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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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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“…Leaves of Trochodendroides are associated with fruits Jenkinsella (Nyssidium) and inflorescences Alasia Golovn. (Golovneva 2006, Golovneva andAlekseev 2017). Pollen grains, extracted from the Alasia anthers, are small tricolpate with long colpi and a variably microreticulate to verrucate-scabrate ornamentation (Krassilov and Kodrul 2008).…”

Section: Systematic Affinitymentioning

confidence: 99%

“…(Golovneva and Alekseev 2010). Trochodendroides-Jenkinsella (Nyssidium)-Alasia plants and the most completely preserved plant from this group, Joffrea speirsii P.R.crane et stocKey, were interpreted as extinct representatives of Cercidiphyllaceae (Crane and Stockey 1985, 1986, Golovneva and Alekseev 2017. In the majority of overviews, this family is not considered among the ancient groups of eudicots, and the timing of its appearance is estimated as the latest Cretaceous (Friis et al 2011).…”

Section: Systematic Affinitymentioning

confidence: 99%

Angiosperm diversification in the Early Cretaceous of Primorye, Far East of Russia

Golovneva¹,

Бугдаева²,

Volynets³

et al. 2021

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The Partizansk and Razdolnaya coal basins of Primorye, Far East of Russia, contain diverse early angiosperm fossils (pollen, leaves, and fruits). In this paper, we revise the previous data on early angiosperms of this region and summarize the results of our latest research. Age of the plant-bearing deposits was clarified using isotopic U-Th-Pb LA-ICP-MS and U-Pb ID-TIMS methods. Age of the upper part of the Lipovtsy Formation is 118 ± 1.4 Ma, which corresponds to the late Aptian. The early Albian age (109 ± 1 Ma) is assigned to the upper part of the Frentsevka Formation. The diversification of angiosperms in the Early Cretaceous of Primorye region and their systematic affinity are analyzed. Early representatives of Laurales, Ranunculales, Platanaceae, and probable Cercidiphyllaceae are revealed. New combination Pandanites ahnertii (Krysht.) Golovn., comb. nov. is created, and new species Araliaephyllum vittenburgii Golovn. et Volynets, sp. nov. is described. Reconstructions of herbaceous angiosperms from autochthonous locality Bolshoy Kuvshin are proposed.

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Taxonomy and morphological diversity of infructescences Jenkinsella co-occurred with Trochodendroides leaves in the Cretaceous and Paleogene

Cited by 11 publications

References 25 publications

The mid-Paleocene fruit and seed flora from the Fort Union Formation of Newell’s Nook, southeastern Montana, USA

The mid-Paleocene fruit and seed flora from the Fort Union Formation of Newell’s Nook, southeastern Montana, USA

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

Angiosperm diversification in the Early Cretaceous of Primorye, Far East of Russia

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