Maksud "pteridosperm" dalam kamus Corsica

ETIMOLOGI PERKATAAN PTERIDOSPERM

From Greek pteris a fern + -sperm.

Etimologi adalah kajian asal perkataan dan perubahan struktur dan makna mereka.

SEBUTAN PTERIDOSPERM DALAM CORSICA

pteridosperm  [ˈtɛrɪdəˌspɜːm]

APAKAH MAKSUD PTERIDOSPERM dalam CORSICA?

Pteridospermatophyta

Pteridospermatophyta

Istilah Pteridospermatophyta merujuk kepada beberapa kumpulan yang berbeza tumbuhan yang menanggung benih. Bukti fosil tertua tumbuhan jenis ini ialah genus Elkinsia dari zaman Devonian yang lewat. Mereka berkembang terutamanya semasa tempoh Karbon dan Permian. Pteridosperms merosot semasa Era Mesozoik dan kebanyakannya hilang pada penghujung Tempoh Kapur, walaupun beberapa tumbuhan seperti pteridosperm kelihatannya telah bertahan dalam zaman Eocene, fosil di Tasmania. Konsep pteridosperma kembali ke abad ke-19 ketika palaeobotanis menyedari bahawa banyak fosil Karboniferous menyerupai patah pakis mempunyai ciri-ciri anatomi yang lebih mengingatkan pada tanaman benih moden, cycads. Pada tahun 1899, palaeobotanis Jerman, Henry Potonié mencipta istilah "Cycadofilices" untuk fosil sedemikian, mencadangkan bahawa mereka adalah sekumpulan tumbuhan bukan benih antara kedua paku dan cycads.

The term Pteridospermatophyta refers to several distinct groups of extinct seed-bearing plants. The oldest fossil evidence of plants of this type is the genus Elkinsia of late Devonian age. They flourished particularly during the Carboniferous and Permian periods. Pteridosperms declined during the Mesozoic Era and had mostly disappeared by the end of the Cretaceous Period, though some pteridosperm-like plants seem to have survived into Eocene times, fossilized in Tasmania. The concept of the pteridosperms goes back to the late 19th century when palaeobotanists came to realise that many Carboniferous fossils resembling fern fronds had anatomical features more reminiscent of the modern-day seed plants, the cycads. In 1899 the German palaeobotanist Henry Potonié coined the term "Cycadofilices" for such fossils, suggesting that they were a group of non-seed plants intermediate between the ferns and cycads.

Definisi pteridosperm dalam kamus Corsica

Takrif pteridosperm dalam kamus adalah tumbuhan fernlike yang menghasilkan benih yang telah pupus dari kumpulan Pteridospermae Juga dipanggil: pakis benih.

TERJEMAHAN PTERIDOSPERM

Cari terjemahan pteridosperm kepada 25 bahasa dengan penterjemah Corsica pelbagai bahasa kami.

Terjemahan pteridosperm dari Corsica ke bahasa lain yang dibentangkan dalam bahagian ini telah diperolehi menerusi terjemahan statistik automatik; di mana unit terjemahan penting adalah perkataan «pteridosperm» dalam Corsica.

• Penterjemah Corsica - Cina: pteridosperm
• Penterjemah Corsica - Czech: pteridospermas
• Corsica: pteridosperm
• Penterjemah Corsica - Hindi: pteridosperm
• Penterjemah Corsica - Amhara: pteridosperm
• Penterjemah Corsica - Rusia: pteridosperm
• Penterjemah Corsica - Punjabi: pteridosperm
• Penterjemah Corsica - Basque: pteridosperm
• Penterjemah Corsica - Frisia: pteridosperm
• Penterjemah Corsica - Melayu: Pteridosperm
• Penterjemah Corsica - Chichewa: pteridosperm
• Penterjemah Corsica - Jepun: pteridosperm
• Penterjemah Corsica - Kreol Haiti: pteridosperm
• Penterjemah Corsica - Jerman: Pteridosperm
• Penterjemah Corsica - Vietnam: pteridosperm
• Penterjemah Corsica - Tagalog: pteridosperm
• Penterjemah Corsica - Marathi: पेरीडोस्पर्म
• Penterjemah Corsica - Turki: pteridosperm
• Penterjemah Corsica - Itali: pteridosperm
• Penterjemah Corsica - Poland: pteridosperm
• Penterjemah Corsica - Ukraine: pteridosperm
• Penterjemah Corsica - Romania: pteridosperm
• Penterjemah Corsica - Cina: pteridosperm
• Penterjemah Corsica - Afrikaans: pteridosperm
• Penterjemah Corsica - Swahili: pteridosperm
• Penterjemah Corsica - Parsi: pteridosperm

CORSICA BUKU YANG BERKAIT DENGAN «PTERIDOSPERM»

Ketahui penggunaan pteridosperm dalam pilihan bibliografi berikut. Buku yang berkait dengan pteridosperm dan ekstrak ringkas dari yang sama untuk menyediakan konteks penggunaannya dalam kesusasteraan Corsica.

Paleobotany and the Evolution of Plants

That this represents the way in which the pter- idosperm synangium evolved is evidenced by Carboniferous genera of presumed pteridosperm microspo- rangiate structures (Meyer-Berthaud, 1989). For example, in Zimmermannitheca ( Remy ...

Wilson Nichols Stewart, 1993

Taxonomy of Angiosperms

The Pteridosperm Theory Throughout the Palaeozoic from the Upper Devonian to the Permian, leaves closely resembling those of living ferns are abundant. Some of these leaves were associated with cycad-like.stem structure and on the  ...

V.N. Naik, 1984

Plant Life Through the Ages: A Geological and Botanical ...

In the possession of two kinds of spore a pteridosperm agrees with Selaginella and Isoetes among the lycopods and with the water ferns (Hydropteri- deae) Pilularia and Azolla; but the larger spores of a pteridosperm were not shed from the ...

A. C. Seward, 2010

Paleopalynology: Second Edition

Falcisporites Falcisporites (as well as Vitreisporites and Exiguisporites) pollen was reported from pollen sacs of Caytonanthus (Jurassic caytonialean) and Harrisiothecium (Triassic pteridosperm) by Townrow (1962). Townrow (1965) also ...

Alfred Traverse, 2007

Developmental Genetics and Plant Evolution

Chapter. 6. The. Mostly. Male. theory. of. flower. origins: summary. and. update. regarding. the. Jurassic. pteridosperm. Pteroma. MichaeI W. Frohlich ABSTRACT The Mostly Male theory is the first explanation of the evolutionary origins of the ...

Quentin C.B. Cronk, Richard M. Bateman, Julie A. Hawkins, 2002

The Seeds of Dicotyledons

Misconceptions of the intercalary growth in the chalazal regions of cycads has led to the interpretation of their seeds as bitegmic (Stopes 1905). It has been taken up to reinterpret the lyginopterid pteridosperm seed as the bitegmic forebear of ...

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Paleobotany: The Biology and Evolution of Fossil Plants

Tristichia ovensi gen. sp. nov., a protostelic Lower Carboniferous pteridosperm from Berwickshire and East Lothian, with an account of some associated seeds and cupules. Transactions of the Royal Society of Edinburgh 64: 477–492.

Edith L. Taylor, Thomas N. Taylor, Michael Krings, 2009

Sphenopteris Sellardsii, a Problematical Pteridosperm from ...

Discusses the characteristics of Sphenopteris sellardsii, a new species of pteridosperm based on fertile foliage from the Elmo Limestone member of Early Permian age in east-central Kansas.

Robert W. Baxter, 1978

Geological Survey Professional Paper

DISCUSSION The specimen described here is not only the first demonstrably ovuliferous pteridosperm found in the Hermit Shale, but it is also one of very few examples of seed-bearing pteridospermous foliage known in the Paleozoic of North ...

‎1971

Introduction to Taxonomy of Angiosperms

8.3.3. Pteridosperm. Theory. According to Andrews (1961), some Pteridosperms may have given rise to angiosperms. Many Palaeozoic pteridosperms, like Lagenostoma possess cupulate seeds. On the other hand in Gnetopsis (Figure 8.4) ...

Verma, Verma B. K.

BARANGAN BERITA YANG TERMASUK TERMA «PTERIDOSPERM»

Ketahui apa yang diterbitkan oleh akhbar nasional dan antarabangsa dan cara istilah pteridosperm digunakan dalam konteks perkara berita berikut.

City-sized fossilized forest found

Detail of a pteridosperm, an extinct seed-producing fern-like plant. The image shows an area about six cm (2.4 inches) in height. (Courtesy Howard Falcon-Lang) ... «World Science, Apr 07»

World's first rainforest found in Illinois

Detail of a pteridosperm, an extinct seed-producing fern-like plant. Width across image about six centimeters. Credit: Dr. Howard Falcon-Lang ... «Mongabay.com, Apr 07»