Results 21 to 30 of about 205 (136)
Richard Maack and his contributions to the botany of Siberia
Nordic Journal of Botany, Volume 2023, Issue 4, April 2023., 2023 A brief account of the biography of Richard Maack (1825–1886) is provided, with an emphasis on his botanical travels and research presented in the context of contemporary politics and sciences. The history of three Siberian expeditions of the Imperial Russian Geographical Society is detailed: to the Viluy River in 1853–1855, to the Amur River in 1855 ...
Alexander N. Sennikov, Irina V. Sokolova
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Morphology and developmental traits of the trilobite Changaspis elongata from the Cambrian Series 2 of Guizhou, South China [PDF]
Acta Palaeontologica Polonica, 2019 The morphology and ontogeny of the trilobite Changaspis elongata based on 216 specimens collected from the Lazizhai section of the Balang Formation (Stage 4, Series 2 of the Cambrian) in Guizhou Province, South China are described.
Guang-Ying Du +5 more
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Global Change Biology, Volume 28, Issue 19, Page 5793-5807, October 2022., 2022 We simulated the latitudinal gradient of warming‐driven extinctions as caused solely by Earth’s spherical geometry and temperature. Simulations are consistent with the empirical extinction gradients of fossil marine invertebrates over seven global warming events, with extinction maxima in the tropics and at the poles.
Carl J. Reddin +3 more
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Molecular Ecology Resources, Volume 22, Issue 1, Page 375-390, January 2022., 2022 Abstract Here, we present the chromosome‐level genome assembly of Dysdera silvatica Schmidt, 1981, a nocturnal ground‐dwelling spider endemic from the Canary Islands. The genus Dysdera has undergone a remarkable diversification in this archipelago mostly associated with shifts in the level of trophic specialization, becoming an excellent model to study
Paula Escuer +7 more
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Validating marine Devonian biogeography: a study in bioregionalization
Palaeontology, Volume 65, Issue 1, January/February 2022., 2022 Abstract The Devonian record presents an opportunity to test and validate an existing marine bioregionalization. This study is the first to use comparative biogeography and phylogenetic data to test Devonian bioregionalization. Proposed in the 1960s, the Old World, Eastern Americas and Malvinokaffric realms have been the functional standard for marine ...
Elizabeth M. Dowding +3 more
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Papers in Palaeontology, Volume 7, Issue 4, Page 2245-2253, November 2021., 2021 Abstract The first Silurian trilobite known with soft parts preserved, a Dalmanites species, is described from the Herefordshire Lagerstätte. Biramous appendages and much of the alimentary system are evident. High‐fidelity three‐dimensional preservation reveals a novel arrangement of the exopod, in which successive filaments are connected by a presumed
Derek J. Siveter +5 more
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Journal of Morphology, Volume 282, Issue 6, Page 833-846, June 2021., 2021 Spiral segmentation or helicomery was first described in annelid and arthropod body segments. However, corresponding patterns occur in arthropod appendages and other bilaterians with serially arranged body parts, such as tapeworms, nematodes, vertebrates, and probably chitons.
Gerhard Scholtz
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Papers in Palaeontology, Volume 7, Issue 2, Page 985-1002, May 2021., 2021 Abstract Trilobites offer almost unparalleled insight into the growth and development of fossil ecdysozoans. Here I use newly collected material of Elrathia kingii (Meek) to estimate growth rates and describe shape change over the ontogeny of E. kingii.
Melanie J. Hopkins, Javier Álvaro
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First record of the Ordovician fauna in Mila-Kuh, eastern Alborz, northern Iran [PDF]
Estonian Journal of Earth Sciences, 2015 Restudy of the Cambrian–Ordovician boundary beds, traditionally assigned to the Mila Formation Member 5 in Mila-Kuh, northern Iran, for the first time provides convincing evidence of the Early Ordovician (Tremadocian) age of the uppermost part of the ...
Mohammad-Reza Kebria-ee Zadeh +4 more
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A new Late Ordovician bubble-headed trilobite species from South West Wales and its implications for biostratigraphy [PDF]
Acta Palaeontologica PolonicaA new species of bubble-headed trilobite, Staurocephalus oliveae sp. nov., is described from 250 specimens collected from a recently discovered locality in the Sholeshook Limestone Formation (upper Katian, Upper Ordovician; Ashgill, Cautleyan Zone 1 ...
MANUS G. LEIDI +3 more
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