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443 results for “cephalopod”
Data for: Cephalopod Sex Determination and its Ancient Evolutionary Origin
<p>This repository contains the chromosome-level genome assembly, annotation, and genome hub files of the California two-spot octopus (<em>Octopus bimaculoides</em>). These data resulted in the discovery of the cephalopod sex chromosomes. Read the paper in <em>Current Biology </em>here: https://doi.org/10.1016/j.cub.2025.01.005. </p>
Fig. 44 in The cephalopods of the Boda Limestone, Late Ordovician, of Dalarna, Sweden
Fig. 44. Parvihebetoceras wahli Kröger, 2007, PMU 26949, Kallholn, Boda Limestone. A. Lateral view. B. Adapical view. C. Median section with one septum preserved. Scale bar = 5 mm for all figures.
Fig. 45 in The cephalopods of the Boda Limestone, Late Ordovician, of Dalarna, Sweden
Fig. 45. Hypothesis about the phylogenetic relationship of selected Ascocerida and Barrandeocerida. Note the phylogenetic trend of decoiling in ascocerids. The diversification of ascocerids occurred during the late Mid Ordovician. Star = truncation; 1 = thin subcentral siphuncle with orthocerid-like thin connecting ring; 2 = uncoiling. The close phylogenetic relationship between the uranoceratid Warburgoceras gen. nov. and ascocerids is based on the general similarity of shell shape, ornamentation, sipho-position and connecting ring shape of Redpathoceras Flower, 1963. Note also that Montyoceras titaniforme Flower, 1941 is larger, more rapidly expanding and more strongly coiled than the type of the genus, and thus much more similar to Redpathoceras. Figures of Hebetoceras Flower, 1941; Montycoceras Flower, 1941; Probillingsites Flower, 1941; Billingsites Hyatt, 1884; Schuchertoceras Miller, 1932; and Ascoceras Barrande, 1847 are modified from Kesling (1961). Figures of Choanoceras Lindström, 1890 are based on Furnish & Glenister (1964a); those of Deckeroceras Foerste, 1935 and Barrandeoceras Flower, 1950 are based on Sweet (1964a).
Fig. 41 in The cephalopods of the Boda Limestone, Late Ordovician, of Dalarna, Sweden
Fig. 41. Redpathoceras bullatum sp. nov., PMU 26926, Kallholn, Boda Limestone. A. Polished median section of detail of the septal neck and connecting ring. B. Reconstruction of A. C. Reconstruction of the total truncated fragment. Scale bar: A-B = 1 mm.
Fig. 39 in The cephalopods of the Boda Limestone, Late Ordovician, of Dalarna, Sweden
Fig. 39. Ascocerida and Uranoceratidae of the Boda Limestone. A-B. Redpathoceras bullatum sp. nov. A. PMU 26923, holotype, Kallholn; mature truncated body chamber, lateral view. B. Same specimen, view from antispihuncular side. C. Warburgoceras longitudinale (Angelin in Angelin & Lindström, 1880) comb. nov., NRM-PZ Mo 154065, Unskarsheden; mature body chamber and part of phragmocone in lateral view. D-E. Probillingsites scandinavicum sp. nov., PMU 26922, holotype, Kallholn. D. Mature truncated body chamber, lateral view. E. Same specimen, view from prosiphuncular side. F. Schuchertoceras fryi sp. nov., PMU 24744, holotype, Kalllholn, lateral view. Scale bars: A-E =10 mm; F = 10 mm.
Fig. 38 in The cephalopods of the Boda Limestone, Late Ordovician, of Dalarna, Sweden
Fig. 38. Morphological variation of Siljanoceras gen. nov. Black dots = Siljanoceras varians sp. nov.; grey dot = Siljanoceras sp. A.
Fig. 37 in The cephalopods of the Boda Limestone, Late Ordovician, of Dalarna, Sweden
Fig. 37. Detail of ornamentation of Siljanoceras varians sp. nov., PMU 26913, Kallholn, Boda Limestone; position of apex down. Scale bar = 10 mm.
Fig. 35 in The cephalopods of the Boda Limestone, Late Ordovician, of Dalarna, Sweden
Fig. 35. Siljanoceras gen. nov., Kallholn, Boda Limestone. A-D. Siljanoceras varians sp. nov. A. PMU 26909, holotype, mature body chamber, view from prosiphuncular side. B. Same specimen, lateral view. C. PMU 26913, lateral view. D. Same specimen, adapical view. E-F. Apical fragment of Siljanoceras? sp., PMU 26918. E. Lateral view. F. Adapical view. G-I. Siljanoceras varians sp. nov. G. Same specimen as in A-B, adapical view. H. PMU 26914, lateral view. I. Same specimen view from prosiphuncular side. Scale bars: A-D, G-I =10 mm; E-F = 2 mm.
Fig. 33 in The cephalopods of the Boda Limestone, Late Ordovician, of Dalarna, Sweden
Fig. 33. Morphological variation in Discoceras roemeri Strand, 1934. Black dots = specimens of the Boda Limestone. Black dot with grey margin = Rectanguloceras balaschovi Stumbur, 1962. Grey dots = Lituites antiquissimus of Roemer (1861: pl. 6, figs 2a-e). Grey dot with black margin = Discoceras roemeri of Dzik (1984: pl. 6, figs 5,6). White dot with black circle = Discoceras roemeri of Strand (1934: pl. 5, fig. 1). WER = whorl expansion rate.
Fig. 34 in The cephalopods of the Boda Limestone, Late Ordovician, of Dalarna, Sweden
Fig. 34. Muscle attachment scars from ventromyarian periphract in Siljanoceras varians sp. nov., PMU 26909, holotype, Kallholn. Scale bar = 10 mm.
Fig. 29 in The cephalopods of the Boda Limestone, Late Ordovician, of Dalarna, Sweden
Fig. 29. Polished median sections of Tyrioceras Strand, 1934, Boda Limestone. A. Tyrioceras cf. kjaerulfi Strand, 1934, PMU 26897, Kallholn, detail of septal neck with massive endocameral and epichoanitic deposits and long orthochoanitic septal necks. B. Tyrioceras warburgae Frye, 1982, PMU 26900, Kallholn, detail of septal neck with epichoanitic deposits. C. Same specimen as in A, total fragment. Scale bars: A-B = 5 mm; C = 10 mm.
Fig. 27 in The cephalopods of the Boda Limestone, Late Ordovician, of Dalarna, Sweden
Fig. 27. Angle of expansion of 15 measured specimen of Isorthoceras cf. elongatocinctum (Portlock, 1843), Boda Limestone, Late Katian, Dalarna, Sweden.
Fig. 36 in The cephalopods of the Boda Limestone, Late Ordovician, of Dalarna, Sweden
Fig. 36. Polished median sections of Siljanoceras gen. nov., Boda Limestone. A. Detail of siphuncular segment of Siljanoceras sp. A, PMU 26917, Kallholn. B. Same specimen, total view. C. Siljanoceras varians sp. nov., PMU 26915, Kallholn; detail of apical-most siphuncular segment, section not perfectly in median plane, with adapical septal perforation not preserved. D. Same specimen, total view. Scale bars: A, C = 1 mm; B, D = 5 mm.
Fig. 30 in The cephalopods of the Boda Limestone, Late Ordovician, of Dalarna, Sweden
Fig. 30. Reconstruction of median section of Tyrioceras cf. kjaerulfi Strand, 1934, PMU 26897, Boda Limestone, Kallholn. Black = outer shell and septa; grey = cameral deposits.
Fig. 40 in The cephalopods of the Boda Limestone, Late Ordovician, of Dalarna, Sweden
Fig. 40. Polished median section of Redpathoceras bullatum sp. nov., PMU 26926, Kallholn, Boda Limestone. A. Complete truncated phragmocone fragment. B. Adoral part with crowded septa and expanded siphuncular segments. C. Adapical part with wide septald distance and elongated siphuncular segments. Scale bars: A = 10 mm; B-C = 5 mm.
Fig. 26 in The cephalopods of the Boda Limestone, Late Ordovician, of Dalarna, Sweden
Fig. 26. Variability of the angle of expansion in fragments of different diameters of Isorthoceras wahlenbergi Niko, 2008 (black points) and Isorthoceras dalecarlense Kröger et al., 2010 (grey points). The black circles refer to specimens figured in Kröger et al. (2011: fig. 11) and identified as I. dalecarlense, therein. The complete dataset, presented herein, demonstrates that a definite species distinction by angle of expansion and size alone is impossible in fragmentary specimens with angles of expansion between 6° and 8°. Additionally, the complete dataset reveals that specimens with conch diameter> 7 mm and angle of expansion> 8° in Kröger et al. (2011: fig. 11) must correctly be interpreted as fragments of I. wahlenbergi.
Fig. 25 in The cephalopods of the Boda Limestone, Late Ordovician, of Dalarna, Sweden
Fig. 25. Variability of the angle of expansion in fragments of different diameters of Isorthoceras angelini sp. nov. Note the tendency of decreasing angle of expansion with diameter. The adult diameter is reached at ca. 15 mm.
Fig. 17 in The cephalopods of the Boda Limestone, Late Ordovician, of Dalarna, Sweden
Fig. 17. Shell ornamentation of selected Orthocerida of the Boda Formation. A. Isorthoceras cf. elongatocinctum (Portlock, 1843), PMU 26825, Kallholn, adoral part of the specimen. B. Dawsonoceras stumburi sp. nov., PMU 26717, holotype, Kallholn. C. Gorbyoceras sp. A, PMU 26772, Osmundsberget. D. Isorthoceras cf. elongatocinctum (Portlock, 1843), same specimen as in A, adapical part of specimen. E. Isorthoceras junceum (Hall, 1847), PMU 26834, Kallholn. F. Gorbyoceras alternestriatum (Strand, 1934) comb. nov., PMU 26771, Unskarsheden. G. Isorthoceras curvilineatum sp. nov., PMU 26787, holotype, Osmundsberget. H. Isorthoceras angelini sp. nov., PMU 26774, holotype, Kallholn. I. Isorthoceras suave (Angelin in Angelin & Lindström, 1880) comb. nov., PMU 26835, Kallholn. Scale bar = 5 mm for all figures.
Fig. 22 in The cephalopods of the Boda Limestone, Late Ordovician, of Dalarna, Sweden
Fig. 22. Geisonoceras wegelini (Angelin in Angelin & Lindström, 1880) comb. nov., PMU 26740, from Unskarsheden, Boda Limestone. Same specimen as in Fig. 13I.
Fig. 20 in The cephalopods of the Boda Limestone, Late Ordovician, of Dalarna, Sweden
Fig. 20. Polished median sections of Nathorstoceras sp. nov., Kallholn, Boda Limestone. A. Nathorstoceras adnatum sp. nov., PMU 26733, holotype, Kallholn. B. Nathorstoceras kallholnense sp. nov., PMU 26729, holotype, Kallholn. Scale bar = 10 mm for both figures.
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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)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
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.