Find research datasets worth reusing
Search datasets from major research repositories and use ShareScore to quickly assess how well each record supports discovery, access, and reuse.
8
datasets available to search
ShareScore release 0.7.1
Dataset results
8 results for “Gaviiformes”
Figure 7 in Oldest fossil loon documents a pronounced ecomorphological shift in the evolution of gaviiform birds
Figure 7. Strict consensus tree of the two most parsimonious trees (tree length = 246, consistency index = 0.44 and retention index = 0.63) resulting from the phylogenetic analysis. Bootstrap support values are indicated next to the internodes. †Extinct taxa.
Figure 5 in Oldest fossil loon documents a pronounced ecomorphological shift in the evolution of gaviiform birds
Figure 5. Nasidytes ypresianus gen. et sp. nov. from the early Eocene London Clay of Walton-on-the-Naze (Essex, UK), leg bones of the holotype (NMS.Z.2021.40.24), in comparison to fossil and extant gaviiforms. A, N. ypresianus, left femur in cranial view. B, left femur of '?Colymboides metzleri' from the early Oligocene of Germany (SMNS 80739/2a) in cranial view; the bone is coated with ammonium chloride, and surrounding matrix was digitally removed. C, Gavia stellata (SMF 7241), left femur in cranial view. D, E, N. ypresianus, proximal portion of right tibiotarsus in cranial (D) and caudal (E) view. F, G, N. ypresianus, distal portion of right tibiotarsus in cranial (F) and distal (G) view. H, Colymbiculus udovichenkoi from the middle Eocene of Ukraine, distal end of left tibiotarsus (SMF Av 589) in cranial view. I, G. stellata (SMF 7241), distal end of
Figure 3 in Oldest fossil loon documents a pronounced ecomorphological shift in the evolution of gaviiform birds
Figure 3. Nasidytes ypresianus gen. et sp. nov. from the early Eocene London Clay of Walton-on-the-Naze (Essex, UK), sternum, pectoral girdle bones and vertebrae of the holotype (NMS.Z.2021.40.24), in comparison to fossil and extant Gaviiformes. A‒D, N. ypresianus, sternum in ventral (A), dorsal (B), left lateral (C) and cranial (D) view. E, F, N. ypresianus, furcula in caudolateral (E) and caudal (F) view. G, H, Gavia stellata (SMF 7241), furcula in caudolateral (G) and caudal (H) view. I, J, N. ypresianus, right coracoid in dorsal (I) and ventral (J) view. K, left coracoid of Colymboides anglicus (holotype, NHMUK A 30330) from the late Eocene of England in dorsal view. L, right coracoid of G. stellata (SMF 7241) in dorsal view. M, N. ypresianus, right scapula in lateral view. N, right scapula of G. stellata (SMF 7241) in lateral view. O, P, N. ypresianus, thoracic (O) and caudal (P) vertebrae. Abbreviations: acr, acromion; apf, apophysis furculae; car, carina sterni; cvx, convexity on medial margin of extremitas sternalis; exo, extremitas omalis; exs, extremitas sternalis; fns, foramen nervi supracoracoidei; pct, processus costales; pla, processus lateralis; plc, pleurocoel; ppc, processus procoracoideus; spe, spina externa; trv, processus transversus. Scale bars: 10 mm.
Figure 2 in Oldest fossil loon documents a pronounced ecomorphological shift in the evolution of gaviiform birds
Figure 2. Nasidytes ypresianus gen. et sp. nov. from the early Eocene London Clay of Walton-on-the-Naze (Essex, UK), quadrate, pterygoid and mandible of the holotype (NMS.Z.2021.40.24) in comparison to extant Gaviidae and Rallidae. A‒E, N. ypresianus, right quadrate in lateral (A), medial (B), caudal (C), cranial (D) and ventral (E) view. F‒J, right quadrate of Gavia stellata (SMF 14210) in lateral (F), medial (G), caudal (H), cranial (I) and ventral (J) view; the arrow in G denotes a detail of the articular surface for the pterygoid. K‒M, N. ypresianus, right pterygoid in dorsal (K), ventral (L) and lateral (M) view. N‒P, right pterygoid of G. stellata (SMF 14210) in dorsal (N), ventral (O) and lateral (P) view. Q, N. ypresianus, rostral half of mandible in dorsal view. R, G. stellata (SMF 14213), mandible in dorsal view. S, Fulica atra Linnaeus, 1758 (Rallidae; SMF 16019), mandible in dorsal view. Abbreviations: arf, articular facet for pterygoid; cas, concave lateral articular surface of condylus medialis; cdc, condylus caudalis; cdl, condylus lateralis; cdm, condylus medialis; cdp, condylus pterygoideus; cpo, capitulum oticum; cps, capitulum squamosum; cqj, cotyla quadratojugalis; fos, pit-like fossa; orb, processus orbitalis; tsc, tuberculum subcapitulare. Scale bars: 10 mm.
Figure 1. A‒C in Oldest fossil loon documents a pronounced ecomorphological shift in the evolution of gaviiform birds
Figure 1. A‒C, The holotype (NMS.Z.2021.40.24) of Nasidytes ypresianus gen. et sp. nov. from the early Eocene London Clay of Walton-on-the-Naze (Essex, UK). A, overview picture of the fossil in 2008, with various bones still in situ. B, condition of the fossil before 2008, based on a photograph from Michael Daniels; note that the right tibiotarsus was not yet fixed to the dorsal surface of the sternum at this time. C, current condition of the specimen, with most bones being removed from the matrix (most preparation work was done by M. Daniels). D, carpometacarpus of the referred specimen (NMS.2021.40.25). Abbreviations: fur, furcula; lfe, left femur; lhu, left humerus; lsc, left scapula; mdb, mandible; rco, right coracoid; rhu, right humerus; rsc, right scapula; rtb, right tibiotarsus; rtm, right tarsometatarsus; ste, sternum. Scale bar: 10 mm.
Figure 4 in Oldest fossil loon documents a pronounced ecomorphological shift in the evolution of gaviiform birds
Figure 4. Nasidytes ypresianus gen. et sp. nov. from the early Eocene London Clay of Walton-on-the-Naze (Essex, UK), wing bones in comparison to fossil and extant gaviiforms and to Australornis lovei from the late early Palaeocene of New Zealand. Except for X, which is from the referred specimen NMS.2021.40.25, all bones of N. ypresianus are from the holotype (NMS.Z.2021.40.24). A, B, N. ypresianus, right (A) and left (B) humerus in caudal (A) and cranial (B) view; the arrow denotes a detail of the distal end. C, Colymbiculus udovichenkoi from the middle Eocene of Ukraine, left humerus lacking proximal end (SMF Av 545) in cranial view. D, left humerus of Gavia stellata (SMF 7241) in cranial view; the arrow denotes a detail of the distal end. E, Australornis lovei (holotype, CM 2010.108.2), right humerus in caudal view. F‒H, N. ypresianus, left ulna in ventral (F), cranial (G) and dorsal (H) view. I, Colymbiculus udovichenkoi, right ulna (SMF Av 548) in ventral view. J, right ulna of`?Colymboides metzleri' from the early Oligocene of Belgium (IRSNB Av 85) in ventral view. K, L, left ulna of G. stellata (SMF 7241) in ventral (K) and cranial (L) view. M, N, N. ypresianus, proximal (M; cranial view) and distal (N; ventral view) ends of left ulna. O, P, Colymbiculus udovichenkoi, proximal (O; cranial view) and distal (P; ventral view) ends of right ulna (SMF Av 548). Q, R, G. stellata, proximal (Q; cranial view) and distal (R; ventral view) ends of left ulna (SMF 7241). S, N. ypresianus, proximal end of left carpometacarpus in ventral view. T, N. ypresianus, os carpi ulnare. U, N. ypresianus, os carpi radiale. V, G. stellata, os carpi ulnare (SMF 7241). W, G. stellata, os carpi radiale (SMF 4435). X, N. ypresianus, left carpometacarpus of referred specimen (NMS.Z.2021.40.25) in ventral view. Y, right carpometacarpus of '?Colymboides metzleri' from the early Oligocene of Belgium (IRSNB Av 85) in ventral view. Z, left carpometacarpus of G. stellata (SMF 7241) in ventral view. Abbreviations: bcp, crista bicipitalis; cdd, condylus dorsalis; cdp, crista deltopectoralis; cdv, condylus ventralis; ctd, cotyla dorsalis; ctv, cotyla ventralis; flx, processus flexorius; fur, transverse furrow; imc, incisura metacarpalis; ntc, notch for tendon of musculus ulnometacarpalis ventralis; olc, olecranon; oma, os metacarpale alulare; pal, processus alularis; pex, processus extensorius; pis, processus pisiformis; tbc, tuberculum carpale; tbd, tuberculum dorsale; tsv, tuberculum supracondylare ventrale. Scale bars: 10 mm.
Figure 6. A in Oldest fossil loon documents a pronounced ecomorphological shift in the evolution of gaviiform birds
Figure 6. A, right foot (dorsal view) of Nasidytes ypresianus gen. et sp. nov. from the early Eocene London Clay of Waltonon-the-Naze (Essex, UK) (NMS.Z.2021.40.24); identification of the pedal phalanges is tentative. B, composite right foot of Gavia stellata in dorsal view (tarsometatarsus: SMF 7241; toes: SMF 2493, left side, mirrored). The digits are numbered. Scale bars: 10 mm.
Figure 8 in Oldest fossil loon documents a pronounced ecomorphological shift in the evolution of gaviiform birds
Figure 8. Summary of phylogenetic interrelationships and stratigraphic occurrences of stem group Gaviiformes and other taxa of Aequornithes; the phylogeny of the extant taxa is based on the studies by Prum et al. (2015) and Kuhl et al. (2021) and differs from the tree topology obtained in the morphology-based analysis performed in the present study. For gaviiform birds, the nodes are characterized by the following characters: (1) hypotarsus with distinct sulci for tendons of musculus flexor hallucis longus and m. flexor perforatus digiti 2; (2) humerus with elongated tuberculum supracondylare ventrale; tibiotarsus with narrow and strongly elongated cristae cnemiales; (3) distal end of ulna with enlarged tuberculum carpale; os metacarpale alulare long and without well-delimited processus extensorius and processus alularis (the carpometacarpus of Colymbiculus is unknown); femur strongly abbreviated and stout; and (4) os carpi ulnare with distinct notch for tendon of musculus ulnometacarpalis ventralis. Stratigraphic occurrences of non-gaviiform Aequornithes (red bars) are from Mayr (2022); the interrupted bars indicate uncertain fossil records for Pelecanidae and Sulidae.
ScienceDex guides
Understand access before you commit
These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
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.