Výsledky vyhledávání - "David J. Siveter"

Akademický článek

A vicissicaudatan arthropod from the Silurian Herefordshire Lagerstätte, UK

Autor: Derek E. G. Briggs, David J. Siveter, Derek J. Siveter, Mark D. Sutton, David Legg, James C. Lamsdell

Publikováno v: Royal Society Open Science, Vol 10, Iss 8 (2023)

A new arthropod, Carimersa neptuni gen. et sp. nov., is described from the Silurian (Wenlock Series) Herefordshire Konservat-Lagerstätte, UK. The head bears pedunculate eyes and five pairs of appendages. Triflagellate antennae are followed by two pa

Externí odkaz: https://doaj.org/article/cacbf06eea16422d9046751263089b27

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Akademický článek

Silurian myodocope ostracods from Poland

Autor: Vincent Perrier, Ewa Olempska, David J. Siveter, Mark Williams, Nicolas Legiot

Publikováno v: Acta Palaeontologica Polonica, Vol 64, Iss 2, Pp 379-397 (2019)

Newly collected material reveals that the Silurian myodocope ostracods from the Holy Cross Mountains, Poland comprise ten species (one new to science) belonging to four families: Bolbozoidae, Entomozoidae, Rhomboentomozoidae, and Cypridinidae. Biostr

Externí odkaz: https://doaj.org/article/e73995a7c07a493799c521996ceb145f

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Akademický článek

Three-dimensionally preserved soft tissues and calcareous hexactins in a Silurian sponge: implications for early sponge evolution

Autor: Ardianty Nadhira, Mark D. Sutton, Joseph P. Botting, Lucy A. Muir, Pierre Gueriau, Andrew King, Derek E. G. Briggs, David J. Siveter, Derek J. Siveter

Publikováno v: Royal Society Open Science, Vol 6, Iss 7 (2019)

Sponges (Porifera), as one of the earliest-branching animal phyla, are crucial for understanding early metazoan phylogeny. Recent studies of Lower Palaeozoic sponges have revealed a variety of character states and combinations unknown in extant taxa,

Externí odkaz: https://doaj.org/article/80eabbf1b8334d3295cea3dccc667d25

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Akademický článek

A three-dimensionally preserved lobopodian from the Herefordshire (Silurian) Lagerstätte, UK

Autor: Derek J. Siveter, Derek E. G. Briggs, David J. Siveter, Mark D. Sutton, David Legg

Publikováno v: Royal Society Open Science, Vol 5, Iss 8 (2018)

The Herefordshire (Silurian) Lagerstätte (approx. 430 Myr BP) has yielded, among many exceptionally preserved invertebrates, a wide range of new genera belonging to crown-group Panarthropoda. Here, we increase this panarthropod diversity with the lo

Externí odkaz: https://doaj.org/article/83aa1685122042b081136d51a1ffe5fa

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Akademický článek

Rods and cones in an enantiornithine bird eye from the Early Cretaceous Jehol Biota

Autor: Gengo Tanaka, Baochun Zhou, Yunfei Zhang, David J. Siveter, Andrew R. Parker

Publikováno v: Heliyon, Vol 3, Iss 12 (2017)

Extant birds have an extensive spectral range of colour vision among vertebrates, but evidence of colour vision among extinct birds has hitherto been lacking. An exceptionally well-preserved extinct enantiornithine fossil bird from the Early Cretaceo

Externí odkaz: https://doaj.org/article/b0844595edb245848e277cd5bc3afaaa

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Akademický článek

THE LAKE IL’MEN CLINT, RUSSIA: A POTENTIAL DEVONIAN GEOPARK

Autor: John E.A. Marshall, David J. Siveter

Publikováno v: Записки Горного института, Vol 234, Pp 581-581 (2018)

The Devonian rocks exposed on the shores of Lake Il’men, some 150 km SSE of Saint Petersburg, are important historically in the context of the recognition of the Devonian System. Moreover, they provide unique potential for a range of geological stu

Externí odkaz: https://doaj.org/article/af4b94aee1bc429eb8954b5ed0ed8fed

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