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875 results for “Brachiopod”
The environmental factors limiting the distribution of shallow-water terebratulid brachiopods
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Supplemental information for: An early burst in brachiopod evolution corresponding with significant climatic shifts during the great Ordovician biodiversification event
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Data from: Brachiopod shell thickness links environment and evolution
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Data from: Were bivalves ecologically dominant over brachiopods in the late Paleozoic? A test using exceptionally preserved fossil assemblages
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Data from: Ecological consequences of the Guadalupian extinction and its role in the brachiopod-mollusk transition
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Data from: Simultaneous estimation of occupancy and detection probabilities an illustration using Cincinnatian brachiopods
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Phylogenetic and ecomorphologic diversifications of spiriferinid brachiopods after the end-Permian extinction
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Data from: Origination, extinction, invasion, and extirpation components of the brachiopod latitudinal biodiversity gradient through the Phanerozoic Eon
The geographic distribution of brachiopod genus occurrences over the Phanerozoic shows that secular declines in origination and extinction rates were paralleled by increases in invasion and extirpation rates. Origination and extinction rates declined in two phases, the first from the Cambrian to latest Permian Periods and the second from the latest Permian Period to the present, which were accompanied by concomitant increases in invasion and extirpation rates. In addition to the temporal correlation, an inverse correlation was also weakly evident among time-averaged latitudinal gradients of rates. Compared with faunas at higher latitudes, low-latitude faunas experienced higher origination and extinction rates, and lower invasion and extirpation rates. We suggest that progressive increases in migration ability lowered origination and extinction rates because species that were better equipped to track a preferred habitat, for example, by the ability to disperse larvae over large distances, were less likely to evolve or become extinct in response to local environmental changes. The two phases were separated by the end-Permian mass extinction, which reset to high levels the origination and extinction rates of a taxonomically and ecologically altered global brachiopod fauna. Our data also allow us to quantify the relative contributions of origination, extinction, invasion, and extirpation to regional diversity (quantified as 10° latitudinal zones) more generally. Overall, invasion and extirpation explained slightly more variation in diversity than in situ origination and extinction. The four variables usually occurred in combinations that maintained rather than altered the shape of the latitudinal diversity gradient. For most of the Phanerozoic Eon, the gradient was not the product of continuous renewal, but rather existed as a holdover from a previous interval.
FIG. 11 in Upper Oligocene (Chattian) brachiopod fauna from the Aquitaine Basin, southwestern France and its paleoenvironmental implications
FIG. 11. — Stable carbon and oxygen isotopic values from brachiopod samples.
Fig. 1 in Strophomenide and orthotetide Silurian brachiopods from the Baltic region, with particular reference to Lithuanian boreholes
Fig. 1. Map of Lithuania showing the positions of the boreholes mentioned in the text.
Data from: A new craniid brachiopod genus from the terminal Ordovician Hirnantia fauna of Myanmar and South China
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Data from: Origination, extinction, invasion, and extirpation components of the brachiopod latitudinal biodiversity gradient through the Phanerozoic Eon
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Figure 2 in Craniid brachiopods: aspects of clade structure and distribution reflect continental drift (Brachiopoda: Craniiformea)
Figure 2. Craniid phylogeny. PAUP* maximum likelihood tree constructed from 16S (mitochondrial LSU) rDNA sequences using the best-fitting evolutionary model and showing jackknife clade support (%). In this tree (contrast with Figure 3) the NE Pacific clade is strongly supported as sister of the Southern and New Zealand clades.
Figure 8 in Congruence and conflict: case studies of morphotaxonomy versus rDNA gene tree phylogeny among articulate brachiopods (Brachiopoda: Rhynchonelliformea), with description of a new genus
Figure 8. Ebiscothyris bellonensis gen. et sp. nov., cruise EBISCO, Coral Sea, South-West Pacific, SEM micrographs: A, inner view of ventral valve to show symphytium with a weak line of junction, and small teeth, paratype, CP 2616, 786–836 m depth, IB-2013-4; B–E, inner, tilted, posterior, and side views of dorsal valve to show brachidium and cardinalia, paratype, CP 2557, 800–923 m depth, IB-2013-5; F, inner view of posterior part of complete specimen to show tubular pedicle collar and cardinal process, paratype, CP 2616, 786–836 m depth, IB-2013-6. Scale bars: 1 mm.
Brachiopod - Kirkidium knighti
# SHCMS:G.00148 **Kirkidium knighti** Complete specimen of the Silurian brachiopod Kirkidium knighti. This specimen was donated to Ludlow Museum in the mid to late 1800s. Age: approx 420 million years. Length 7.6cm Width 6.5cm Depth 4.9cm. Imaged using a canon 5DS R and Stackshot 3x with turntable to provide 114 images which were then processed using agisoft photoscan at high levels. If you like this model or any others we produce we'd love to hear from you and how you've used them. Source: Objaverse 1.0 / Sketchfab
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Allen Brain Atlas
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