Results 11 to 20 of about 486,715 (397)
Insect frass in Baltic amber [PDF]
Bulletin of the Geological Society of Finland, 2008 Inclusions of wood debris loosened from pine-like trees are abundant in Baltic amber of Eocene and Oligocene age. The possibilities to find insect frass and excrement among wood debris are outlined and some examples are given.
M. Nuorteva, K.A. Kinnunen
doaj +1 more source
Preservation of Arctic dinosaur remains from the Prince Creek Formation (Alaska, USA): A reply to Fiorillo (2016) [PDF]
Acta Palaeontologica Polonica, 2016 We thank Anthony Fiorillo (2016) for the concerns he raised regarding our characterizations of the Liscomb bonebed fossils in our paper describing Ugrunaaluk kuukpikenis from the Prince Creek Formation of Alaska, USA (Mori et al. 2016). We did not
Hirotsugu Mori +2 more
doaj +1 more source
Seeds, 2023 Physical dormancy (PY) due to a water-impermeable seed/fruit coat is one of the characteristic features of many species of Fabaceae; however, the timing and context of the evolution of this trait are poorly understood.
Ganesh K. Jaganathan, Keith Berry
doaj +1 more source
Fossils improve phylogenetic analyses of morphological characters
bioRxiv, 2020 Fossils provide our only direct window into evolutionary events in the distant past. Incorporating them into phylogenetic hypotheses of living clades can help elucidate macroevolutionary patterns and processes, such as ancestral states and ...
N. M. Koch, R. Garwood, L. Parry
semanticscholar +1 more source
Life, 2023 The female micro-wasp in mid-Cretaceous Burmese amber is described as a new genus and species in the extinct family Caradiophyodidae fam. nov. (Hymenoptera: Platygastroidea). Features of the specimen are its small body size (1.3 mm), no elbows, elongated,
George Poinar, Fernando E. Vega
doaj +1 more source
Rates and Rocks: Strengths and Weaknesses of Molecular Dating Methods
Frontiers in Genetics, 2020 I present here an in-depth, although non-exhaustive, review of two topics in molecular dating. Clock models, which describe the evolution of the rate of evolution, are considered first.
Stéphane Guindon
doaj +1 more source
Microscopic recognition of micro fossils in carbonate rocks based on convolutional neural network
Shiyou shiyan dizhi, 2021 The identification of microfossils in carbonate rocks with thin-section observation is of great significance for the study of sedimentary environment, but the traditional method by manual identification is highly experience required and is greatly ...
Xiaolu YU +4 more
doaj +1 more source
The Clicking Elateroidea from Chinese Mesozoic Deposits (Insecta, Coleoptera)
Insects, 2020 Recent molecular studies have suggested that the clicking beetle families Elateridae, Eucnemidae, Throscidae, and Cerophytidae evolved in the Jurassic and diversified in the Cretaceous.
Jyrki Muona, Huali Chang, Dong Ren
doaj +1 more source
Geo&Bio, 2019 The palaeontological collection of the Geological Department of the National Museum of Natural History NAS of Ukraine (NMNH NASU) is among the most valuable objects of the national scientific and cultural heritage. The article presents a brief analytical
G. V. Anfimova +3 more
doaj +1 more source
, 1995 This guide is designed to be used by teachers as an aid for teaching principles of fossils and past life to elementary school students. The activities and labs provided include topics such as fossilization, sedimentation, trace fossils, the importance of
core +2 more sources