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323 results for “Paleontology”
Fig. 5 in Morphology and genetics of grasshopper mice revisited in a paleontological framework: reinstatement of Onychomyini (Rodentia, Cricetidae)
Fig. 5.—Phylogenetic consensus tree obtained from Bayesian inference (BI) analysis of the concatenated mitochondrial and nuclear independent loci. Posterior probabilities support are indicated in grayscale circles for each node. Terminal in bold indicates the Onychomyini species.
Fig. 1 in Morphology and genetics of grasshopper mice revisited in a paleontological framework: reinstatement of Onychomyini (Rodentia, Cricetidae)
Fig. 1.—First lower molars of Onychomys and Acrolophomys. Onychomys: A—Lm1, UALP 13963, 111 Ranch, Arizona, Blancan (from Tomida, 1985); B—Rm1, FHSM VP-19867, reversed, Hornet, Meade Basin, Kansas, Blancan, photo by P. Peláez-Campomanes; C—Lm1, USNM 525590; D—Lm1, USNM 017881; E—Lm1, USNM 272116; F–H—Rm1, FHSM VP-19868, reversed, Borchers, Meade Basin, Kansas, Blancan; I–K— Lm1, FHSM VP-19869, Borchers, Meade Basin, Kansas. Acrolophomys: L–N—Rm1, reversed, LACM 124878; O–Q—Lm1, LACM 124912; R–T—Rm1, reversed, LACM 156372, Dove Springs, California, latest Hemphillian–earliest Blancan, from Kelly and Whistler (2014). Occlusal views, A–F, I, L, O, and R. Labial views, G, J, M, P, and S. Lingual views, H, K, N, Q. All m1s adjusted to equal length.
Fig. 2 in Morphology and genetics of grasshopper mice revisited in a paleontological framework: reinstatement of Onychomyini (Rodentia, Cricetidae)
Fig. 2.—Examples of lower molars of species included in the morphological cladistic analysis. A—Rm1–3, reversed, UCMP 317546, from Ronez et al. (2020). B—Rm1–3, reversed, MVZ 105624, photo by A. Pacheco-Castro. C—Rm1–3, reversed, MNCN-275, photo by P. PeláezCompomanes. D—Rm1–3, reversed, USNM 27211. E—Rm1–3, reversed, LACM 125052, from Kelly and Whistler (2014). F—Lm1–3, FMNH 230688, photo by C. Ronez. G—Lm1–3, UNSM 272173, photo by R. Martin. H—Rm1–3, reversed, MVZ 219614. I—Lm1–3, MVZ 225121. J—Lm1–3, MVZ 219161. Photos H, I, and J by Jessica L. Blois, UC Merced. All occlusal views. Not to scale, all m1s adjusted to equal length.
Fig. 4 in Morphology and genetics of grasshopper mice revisited in a paleontological framework: reinstatement of Onychomyini (Rodentia, Cricetidae)
Fig. 4.—Single most parsimonious tree, 42 steps, consistency index (CI) = 0.857, retention index (RI) = 0.926. The cladogram is supported by the following list of hypothesized ancestral synapomorphies (number to left of period denotes character number and to right of period character state). Node 1, 6.1, 13.1, 17.1; Node 2, 5.2, 7.1, 11.2, 15.1, 18.1, 25.1; Node 3, 20.1, 21.1, 24.1; Node 4, 3.1, 16.1, 17.2, 23.2; Node 5, 5.1, 11.1; Node 6, 1.1, 16.2; Node 7, 12.2, 14.1; Node 8, 2.1, 4.1, 7.1, 8.1, 9.1, 10.1. Additional apomorphies for terminal taxa are: B. taylori, 5.2; R. montanus, 15.2; and O. leucogaster, 12.1, 14.1, 15.2.
Fig. 10 in Morphology and genetics of grasshopper mice revisited in a paleontological framework: reinstatement of Onychomyini (Rodentia, Cricetidae)
Fig. 10.—Divergence times tree for Neotominae subfamily based on a concatenated analysis of the mitochondrial protein-coding gene cytochrome-b, and intron 2 and parts of exons 2 and 3 of acid phosphatase type V, intron 2 of the alcohol dehydrogenase gene, exon 6 of the protein-coding dentin matrix protein 1 gene, intron 7 of the beta-fibrinogen gene, exon 10 of the growth hormone receptor, single exon of the recombination activation 1 gene, and the first exon of the nuclear gene interphotoreceptor retinoid-binding protein. Divergence date estimates are indicated in millions of years. Bars indicate the minimum and maximum date at the 95% highest posterior density for node height (95% HPD).
Fig. 13 in Morphology and genetics of grasshopper mice revisited in a paleontological framework: reinstatement of Onychomyini (Rodentia, Cricetidae)
Fig. 13.—Relative proportions of crown divisions in extant genera of tribes of Neotominae following the interpretation of Koenigswald (2020). Relative lengths of differentiated roots of some taxa not available due to breakage or buried in alveolus. Numbers correspond to the following genera: 1, Neotoma; 2, Ochrotomys; 3, Scotinomys; 4, Baiomys; 5, Isthmomys; 6, Reithrodontomys; 7, Onychomys; 8, Acrolophomys; 9, Habromys; 10, Megadontomys; 11, Neotomodon; 12, Osgoodomys; 13, Peromyscus; 14, Podomys.
Fig. 12 in Morphology and genetics of grasshopper mice revisited in a paleontological framework: reinstatement of Onychomyini (Rodentia, Cricetidae)
Fig. 12.—Selected dental, mandibular, and cranial characters of Onychomys: (A) oblique occlusal view of m1 showing tubercular hypsodonty of procingulid and primary cusps that taper to sharp apices; (B) lateral view of sword or scimitar-like, elongated coronoid process of mandible that extends well posterior of incisor capsule; (C) lateral view of mandible showing dorsoventrally narrowed masseteric scar that terminates anteriorly under anterior root of m1 and dorsal of mental foramen; (D) ventral view of palate showing positions of posterior borders of incisive foramina relative anterior border of M1 and anterior border of posterior nares relative to posterior border of M3; (E) dorsal view of skull showing posteriorly tapered nasals with wedgeshaped termination, and anterior inflation of frontals (arrows). (A–C) O leucogaster, MACN 13433. (D–E) O. torridus, CNP 6482.
Fig. 9 in Morphology and genetics of grasshopper mice revisited in a paleontological framework: reinstatement of Onychomyini (Rodentia, Cricetidae)
Fig. 9.—Majority-rule consensus tree obtained from Bayesian inference analysis of combined morphological and molecular data sets continued. Part of the consensus tree corresponding to Neotominae and non-neotomine outgroup taxa. Posterior probabilities values are indicated in grayscale circles for each node. Terminal in bold indicates fossil species (†, extinct).
Paleontological Hall
Paleontological Hall of the Geological Museum. Point cloud. Source: Objaverse 1.0 / Sketchfab
Figs 5–6 in New findings of Cryptophagidae (Coleoptera: Clavicornia) from Baltic amber in the unbiased collection of the Paleontological Institute of RAS
Figs 5–6. Photo of a new specimen of A. groehni from Baltic amber: 5 — dorsal view; 6 — dorsolateral view. Рис. 5–6. ВнеШний вид A. groehni иЗ балтийского ЯнтарЯ: 5 — сверху; 6 — сверху и сбоку.
Figs 1–4 in New findings of Cryptophagidae (Coleoptera: Clavicornia) from Baltic amber in the unbiased collection of the Paleontological Institute of RAS
Figs 1–4. Photo of a new specimen of M. sarnensis from Baltic amber: 1 — dorsal view; 2 — lateral view; 3 — ventral view; 4 — head and pronotum, ventrolateral view. Рис. 1–4. ВнеШний вид M. sarnensis иЗ балтийского ЯнтарЯ: 1 — габитус, сверху; 2 — габитус, сбоку; 3 — габитус,сниЗу; 4 — голова и переднеспинка, сниЗу и сбоку.
How the past creates the present: reviewing the foundational roles of colonialism and systemic racism and their modern manifestations in paleontology
<p><span><span>This talk was delivered by Dr. Pedro Monarrez on March 26th, 2024. </span></span></p> <p><span><span>Dr. Monarrez is the Recruitment, Outreach, Diversity, Equity, Inclusion (RODEI) coordinator in the Department of Earth, Planetary, and Space Sciences at UCLA. His research investigates the biological processes that drive evolutionary patterns of marine organisms across geologic time and the role that the environment has played in these processes. He also studies the variation and reconciliation of local and regional expressions of global macroevolutionary patterns and perturbations, such as mass extinctions. </span></span></p> <p><span><span>This talk was hosted by the Ethical Open Science research coordination network For more information visit: </span><span><a href="https://www.youtube.com/redirect?event=video_description&redir_token=QUFFLUhqbTBmTEsxNkotcDdpQ1N2azVBcXBKM1E5YVZLQXxBQ3Jtc0ttV2NQb29UUVcxRnRkSkFCWXRMNEc2ZXdaeHpES0s5ZzZDbUdiMHNsLTd3QWc0c0FNZl9oODAtNkFWUlJZY3JnZlpBaFhxdVhzeXdsV3JBYWRMRlpsbTFFTjdKNHNhekVuaW9SeWpsSVl5OEhoeDZTYw&q=https%3A%2F%2Feos-rcn.github.io%2Fweb%2Fhome&v=DB-87ZbdSnE" target="_blank" rel="nofollow noopener">https://eos-rcn.github.io/web/home</a></span></span></p> <div></div> <div> <div> <div></div> </div> </div>
Phylogenetic signal and bias in paleontology
<p>An unprecedented amount of evidence now illuminates the phylogeny of living mammals and birds on the Tree of Life. We use this tree to measure phylogenetic value of data typically used in paleontology (bones and teeth) from six datasets derived from five published studies. We ask three interrelated questions: 1) Can these data adequately reconstruct known parts of the Tree of Life? 2) Is accuracy generally similar for studies using morphology, or do some morphological datasets perform better than others? 3) Does the loss of non-fossilizable data cause taxa to occur in misleadingly basal positions? Adding morphology to DNA datasets usually increases congruence of resulting topologies to the well corroborated tree, but this varies among morphological datasets. Extant<span> taxa with a high proportion of missing </span><span>morphological characters can greatly reduce phylogenetic resolution when analyzed together with fossils. Attempts to ameliorate this by deleting extant taxa missing morphology are prone to decreased accuracy due to long-branch artefacts. We find no evidence that fossilization causes extinct taxa to incorrectly appear at or near topologically basal branches. Morphology comprises the evidence held in common by living taxa and fossils, and phylogenetic analysis of fossils greatly benefits from inclusion of molecular and morphological data sampled for living taxa, whatever methods are used for phylogeny estimation. </span></p>
Paleontological reconstruction (3D model) of Dolichoderus jonasi Dubovikoff et Zharkov, 2022 (male).
<p>Supplementary file 2 from Dubovikoff, D. A., Zharkov, D. M. 2022. A new species of the genus Dolichoderus Lund, 1831 (Hymenoptera: Formicidae) from a Late Eocene European amber. Caucasian Entomological Bulletin 181, 147–152 (doi:10.23885/181433262022181-147152).</p> <p>Abstract. A new species of ants, Dolichoderus jonasi sp. n., from a Late Eocene amber (Rovno and presumably Baltic ambers) of Europe is described from three workers and one male. The new species differs from all known fossil and recent species of the genus by the following set of characters: the presence of thorns on the pronotum, a head tapering to the back with pronounced occipital angles, a dimpled (with numerous pits) sculpture on the head and thorax, the presence of a ridge on the posterior edge of the main surface of the propodeum with a row of large setae, the presence of large straight setae on the body arranged in rows, high and somewhat narrowed to the apex petiole scale. The described species cannot be assigned to any of species groups (complexes) in the genus. The phylogenetic relationships of the new species with other species of the genus are discussed. Based on the studied morphological features, the species is closest to representatives of the debilis complex, widespread in South and Central America. However, it has significant differences and should be considered as the separate jonasi complex. We used computer microtomography methods to study structures inaccessible for optical microscopes and accurate measurements, which made it possible to characterize all diagnostic characters of the new species. Reconstructions of a worker and a male using 3D modeling are presented. The discovery of D. jonasi sp. n. in European Late Eocene amber is another possible evidence of relations between the faunas of Europe and the Americas in the past.</p>
Systematic paleontology of macroalgal fossils from the Tonian Mackenzie Mountains Supergroup
<p>Proterozoic eukaryotic macrofossils are rarely preserved with enough morphological detail to inform their phylogeny. This dataset includes the measurements and descriptions of three size classes of filamentous fossils from the Dolores Creek Formation of the Mackenzie Mountain Supergroup in the Wernecke Mountains, Yukon. This data was used to systematically describe and interpret the middle size class specimens as green macroalgae with an unbranching, uniseriate thallus (with uniform width throughout; n=304, width = 0.20 to 0.85 mm) and elliptical to globose anchoring holdfast. Fossils from the smaller size class (n = 90, width = 0.03 to 0.06 mm) retain too little morphological information to define properly. However, a third form is also documented, consisting of a ribbon-shaped thallus with a consistent width (n=19, width = 1.0 to 1.7 mm). The size range of these different, likely photoautotrophic, filaments supports the hypothesis of an increasing morphological complexity and overall diversification of macroalgae during the Tonian, setting the stage for dramatic changes to benthic marine ecosystems prior to the evolution of more complex ecosystems.</p>
Data from: Evolution of body mass in the Pan-Alcidae (Aves, Charadriiformes): the effects of combining neontological and paleontological data
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Data from: A case study of extant and extinct Xenarthra cranium covariance structure: implications and applications to paleontology
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A total-evidence dated phylogeny of Echinoidea combining phylogenomic and paleontological data
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Data from: Problems with using rock outcrop area as a paleontological sampling proxy: rock outcrop and exposure area compared with coastal proximity, topography, land use, and lithology.
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Data from: From fossils to phylogenies: Exploring the integration of paleontological data into Bayesian phylogenetic inference
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
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DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.