Eathiestrobus

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Eathiestrobus
Temporal range: KimmeridgianBerriasian
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Gymnosperms
Division: Pinophyta
Class: Pinopsida
Order: Pinales
Family: Pinaceae
Genus: Eathiestrobus
Rothwell et al., (2012). [1]
Species:
E. mackenziei
Binomial name
Eathiestrobus mackenziei
Rothwell et al., (2012). [1]

Eathiestrobus mackenziei is a fossil pine cone found in the Kimmeridge Clay Formation (Upper Jurassic) near Eathie, on the Black Isle in Scotland. [2] It is the oldest fossil pine currently known. [1]

Contents

Etymology

The genus name Eathiestrobus refers to the place it was found, Eathie, in Scotland, and strobus, which means cone. The species name mackenziei honors Mr. W. Mackenzie, who collected the specimen and donated it to the Hunterian Museum in 1896.

Description

The holotype of Eathiestrobus mackenziei consists of an incomplete, 8 cm long seed cone. It is held in the Hunterian Museum and Art Gallery in Glasgow, and was originally identified as Pityostrobus , but later re-examined and reclassified as a new genus and species. [1]

Significance

Eathiestrobus extends the fossil record for the family Pinaceae by around 20 million years. The oldest fossil pines were known from the Early Cretaceous ( Pinus yorkshirensis and Pityostrobus californensis ). Eathiestrobus was also important because it clarified the characteristics of the seed cones of Pinaceae, making it easier to identify members of the family in the fossil record. [1]

Related Research Articles

The Jurassic is a geologic period and stratigraphic system that spanned from the end of the Triassic Period 201.3 million years ago (Mya) to the beginning of the Cretaceous Period, approximately 145 Mya. The Jurassic constitutes the middle period of the Mesozoic Era and is named after the Jura Mountains, where limestone strata from the period were first identified.

<span class="mw-page-title-main">Pine</span> Genus of plants in the conifer family Pinaceae

A pine is any conifer tree or shrub in the genus Pinus of the family Pinaceae. Pinus is the sole genus in the subfamily Pinoideae. The World Flora Online created by the Royal Botanic Gardens, Kew and Missouri Botanical Garden accepts 187 species names of pines as current, together with more synonyms. The American Conifer Society (ACS) and the Royal Horticultural Society accept 121 species. Pines are commonly found in the Northern Hemisphere. Pine may also refer to the lumber derived from pine trees; it is one of the more extensively used types of lumber. The pine family is the largest conifer family and there are currently 818 named cultivars recognized by the ACS.

<i>Cedrus</i> Genus of plants (coniferous trees)

Cedrus, common English name cedar, is a genus of coniferous trees in the plant family Pinaceae. They are native to the mountains of the western Himalayas and the Mediterranean region, occurring at altitudes of 1,500–3,200 m in the Himalayas and 1,000–2,200 m in the Mediterranean.

<span class="mw-page-title-main">Conifer</span> Group of cone-bearing seed plants

Conifers are a group of cone-bearing seed plants, a subset of gymnosperms. Scientifically, they make up the division Pinophyta, also known as Coniferophyta or Coniferae. The division contains a single extant class, Pinopsida. All extant conifers are perennial woody plants with secondary growth. The great majority are trees, though a few are shrubs. Examples include cedars, Douglas-firs, cypresses, firs, junipers, kauri, larches, pines, hemlocks, redwoods, spruces, and yews. As of 1998, the division Pinophyta was estimated to contain eight families, 68 genera, and 629 living species.

<span class="mw-page-title-main">Araucariaceae</span> Family of plants

Araucariaceae – also known as araucarians – is an extremely ancient family of coniferous trees. The family achieved its maximum diversity during the Jurassic and Cretaceous periods, when it was distributed almost worldwide. Most of the Araucariaceae in the Northern Hemisphere vanished in the Cretaceous–Paleogene extinction event, and they are now largely confined to the Southern Hemisphere, except for a few species of Agathis in Southeast Asia. Araucarians are common in eastern Australia, the French territory of New Caledonia and the Patagonian region today.

<span class="mw-page-title-main">Pinaceae</span> Family of conifers

The Pinaceae, or pine family, are conifer trees or shrubs, including many of the well-known conifers of commercial importance such as cedars, firs, hemlocks, larches, pines and spruces. The family is included in the order Pinales, formerly known as Coniferales. Pinaceae are supported as monophyletic by their protein-type sieve cell plastids, pattern of proembryogeny, and lack of bioflavonoids. They are the largest extant conifer family in species diversity, with between 220 and 250 species in 11 genera, and the second-largest in geographical range, found in most of the Northern Hemisphere, with the majority of the species in temperate climates, but ranging from subarctic to tropical. The family often forms the dominant component of boreal, coastal, and montane forests. One species, Pinus merkusii, grows just south of the equator in Southeast Asia. Major centres of diversity are found in the mountains of southwest China, Mexico, central Japan, and California.

<i>Araucaria</i> Genus of evergreen conifers in the family Araucariaceae

Araucaria is a genus of evergreen coniferous trees in the family Araucariaceae. There are 20 extant species in New Caledonia, Norfolk Island, eastern Australia, New Guinea, East Argentina, South Brazil, Chile and Paraguay.

<span class="mw-page-title-main">Bennettitales</span> Extinct order of seed plants

Bennettitales is an extinct order of seed plants that first appeared in the Triassic period and became extinct in most areas toward the end of the Cretaceous. Bennettitales are among the most common Mesozoic seed plants, and had morphologies including shrub and cycad-like forms. The foliage of bennettitaleans is superficially nearly indistinguishable from that of cycads, but they are distinguished from cycads by their more complex flower-like reproductive organs, at least some of which were likely pollinated by insects.

<i>Pseudolarix</i> Genus of deciduous conifers in the family Pinaceae

Pseudolarix is a genus of coniferous trees in the pine family Pinaceae containing three species, the extant Pseudolarix amabilis and the extinct species Pseudolarix japonica and Pseudolarix wehrii. Pseudolarix species are commonly known as golden larch, but are not true larches (Larix) being more closely related to Keteleeria, Abies and Cedrus. P. amabilis is native to eastern China, occurring in small areas in the mountains of southern Anhui, Zhejiang, Fujian, Jiangxi, Hunan, Hubei and eastern Sichuan, at altitudes of 100–1,500 m (328–4,921 ft). P. wehrii is described from fossils dating to the Early Eocene (Ypresian), of Western North America where it is found in the Eocene Okanagan Highlands Allenby and Klondike Mountain Formations. The youngest known occurrence is of mummified fossils found in the Late Eocene Buchanan Lake Formation on Axel Heiberg Island. P. japonica is known from Middle Miocene to Pliocene sediments in Japan and Miocene deposits of Korea. Fossils assigned to Pseudolarix as a genus date possibly as old as the Early Cretaceous Hauterivian stage in Mongolia.

<i>Abies milleri</i> Species of conifer

Abies milleri, an extinct species of fir known from fossil remains found in deposits from the early Eocene Ypresian stage in Washington State, USA, is the oldest confirmed record for the fir genus.

<i>Araucaria mirabilis</i> Extinct species of conifer

Araucaria mirabilis is an extinct species of coniferous tree from Patagonia, Argentina. It belongs to the genus Araucaria.

Dearcmhara is a genus of marine reptile from the early to mid-Jurassic period around 170 million years ago, known from fossil remains found on the island of Skye in Scotland. The type species is Dearcmhara shawcrossi. Fragmentary fossil remains of the animal were discovered by an amateur fossil hunter in 1959 and were subsequently donated to a museum, but it was not until 2014 that a scientific research project determined that the fossils were of a previously unknown species.

This article contains papers in paleobotany that were published in 2016.

This article records new taxa of plants that are scheduled to be described during the year 2017, as well as other significant discoveries and events related to paleobotany that are scheduled to occur in the year 2017.

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Pinus yorkshirensis is an extinct species of pine tree. The fossil pine cone came from Hauterivian and Barremian-aged sedimentary rocks located in the Speeton Clay in Yorkshire.

Hughmillerites is a fossil cypress, found in the Late Jurassic of Scotland and Early Cretaceous of Canada.

<i>Pseudolarix wehrii</i> Extinct species of conifer

Pseudolarix wehrii is an extinct species of golden larch in the pine family (Pinaceae). The species is known from early Eocene fossils of northern Washington state, United States, and southern British Columbia, Canada, along with late Eocene mummified fossils found in the Qikiqtaaluk Region, Nunavut, Canada.

This paleobotany list records new fossil plant taxa that were to be described during the year 2022, as well as notes other significant paleobotany discoveries and events which occurred during 2022.

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References

  1. 1 2 3 4 5 Rothwell, G.W., Mapes, G., Stockey, R.A. and Hilton, J. 2012. The seed cone Eathiestrobus gen. nov.: fossil evidence for a Jurassic origin of Pinaceae. American Journal of Botany, 99(4): 708-720.
  2. Riding, J.B. (2005). "Middle and Upper Jurassic (Callovian to Kimmeridgian) palynology of the onshore Moray Firth Basin, northeast Scotland". Palynology. 29 (1): 87–142. doi:10.1080/01916122.2005.9989605. S2CID   220340403.