Results 21 to 30 of about 1,869 (195)
Rise and fall of the phacopids: the morphological history of a successful trilobite family
Palaeontology, Volume 66, Issue 5, September/October 2023., 2023 Abstract Phacopidae were a successful family of the Silurian–Devonian period. Although their diversity trends are well identified, their shape evolution is unknown; their morphology often considered to be conservative. We have quantified these morphologies using geometric morphometrics (landmarks) and investigated their evolution using morphological ...
Valentin Bault +7 more
wiley +1 more source
Papers in Palaeontology, Volume 9, Issue 3, May/June 2023., 2023 Abstract Artiopoda was a diverse group of Palaeozoic euarthropods that proliferated in the early Palaeozoic, epitomized by the ubiquitous trilobites. Their possible phylogenetic position outside mandibulates and chelicerates offers the potential for understanding the evolution of euarthropods in more detail.
Harry O. Berks +5 more
wiley +1 more source
Palaeontology, Volume 66, Issue 3, May/June 2023., 2023 Abstract Trilobites were notably flexible in the moulting behaviours they employed, producing a variety of moult configurations preserved in the fossil record. Investigations seeking to explain this moulting variability and its potential impacts are few, despite abundant material being available for study.
Harriet B. Drage +3 more
wiley +1 more source
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
wiley +1 more source
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
doaj +1 more source
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
wiley +1 more source
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
wiley +1 more source
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
wiley +1 more source
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
wiley +1 more source
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
wiley +1 more source