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.
160
datasets available to search
ShareScore release 0.9.0
Dataset results
160 results for “Osteoglossomorpha”
Figure 4 in Comparative osteology and phylogenetic systematics of fossil and living bony-tongue fishes (Actinopterygii, Teleostei, Osteoglossomorpha)
Figure 4. The two fundamental most parsimonious trees resulting from analysis of the data matrix provided in Appendix 1; characters and character states described in text are listed in Appendix 2. The strict consensus is provided in Fig. 5. These trees both have a length of 171 steps, a consistency index (CI) of 0.6433 (0.6139 excluding uninformative characters, a homoplasy index (HI) of 0.3977 (0.3861 excluding uninformative characters), a retention index (RI) of 0.7782 and a rescaled consistency index (RC) of 0.5006. Letters above the nodes correspond to those listed in the text under the heading Character Optimization and Node Support.
Figure 19 in Comparative osteology and phylogenetic systematics of fossil and living bony-tongue fishes (Actinopterygii, Teleostei, Osteoglossomorpha)
Figure 19. Photographs of neurocrania in anterolateral view showing aspects of the trigeminofacialis chamber in four osteoglossomorphs. A, Hiodon alosoides (UMA F10581, 315 mm SL). B, Chitala chitala (UMA F10349, 437 mm SL). C, Pantodon buchholzi (UMA F11265, approx. 50 mm SL). D, Gnathonemus petersii (UMA F11267, approx. 140 mm SL). Arrows indicate position of the foramen for the nerve historically called the combined cranial nerves V and VII; this nerve likely contains a portion of the anteroventral lateral line nerve as well. In Gnathonemus, as in some other mormyroids, there are two separate foramina (i.e. one for V and one for VII).
Figure 3 in Comparative osteology and phylogenetic systematics of fossil and living bony-tongue fishes (Actinopterygii, Teleostei, Osteoglossomorpha)
Figure 3. Hypotheses of osteoglossomorph interrelationships, redrawn from: A, Shen (1996); B, Bonde (1996); C, Taverne (1998). Question marks and dashed lines indicate doubt concerning the placement of a taxon. Note that Shen's (1996) hypothesis places several fossil taxa that are commonly regarded as osteoglossomorphs outside the group (e.g. †Jiaohichthys, †Lycoptera, †Tongxinichthys & †Plesiolycoptera). Taverne's (1998) hypothesis resulted from analysis of 344 characters, although these were presented as a list rather than in the form of a data matrix, and some characters were reversals of others (see Cavin & Forey, 2001). Note that Taverne (1998) considered †Brychaetus to be distantly related to †Phareodus (contrary to Li et al., 1997a), and he considered both genera to be paraphyletic. Contrary to Li & Wilson (1996a), Taverne (1998) considered †Ostariostoma and †Lycoptera to be closely related to the hiodontids, †Singida to be relatively basal, and the monophyly of Scleropages to be uncertain.
Figure 21 in Comparative osteology and phylogenetic systematics of fossil and living bony-tongue fishes (Actinopterygii, Teleostei, Osteoglossomorpha)
Figure 21. Infraorbital bones of Elops and osteoglossomorphs showing different numbering strategies employed by Nelson (1969), Li & Wilson (1996a), and the present study. Nelson's and Li & Wilson's numbering systems are given anterior to posterior, and distinct elements are separated by commas. All are redrawn from those illustrated by Nelson (1969) except for †Lycoptera, which is from Jin et al. (1995) (Nelson did not illustrate †Lycoptera in his study). Black dots indicate position of the neuromast organ(s) associated with each element.
Figure 26 in Comparative osteology and phylogenetic systematics of fossil and living bony-tongue fishes (Actinopterygii, Teleostei, Osteoglossomorpha)
Figure 26. Suspensorium and opercular bones of Heterotis niloticus (MCZ 50959, adult, unknown SL) in medial view. A, photograph. B, line drawing. Note the reduced subopercle. The element labelled 'dpl + ecp' has been suggested in the past to be a fusion of the dermopalatine and the ectopterygoid, although no ontogenetic evidence supports this (see Character 30). Anterior facing right.
Figure 34 in Comparative osteology and phylogenetic systematics of fossil and living bony-tongue fishes (Actinopterygii, Teleostei, Osteoglossomorpha)
Figure 34. Abdominal region of Notopteridae. A, Abdominal region of Chitala sp. (UMA F10341, 75 mm SL), showing several features characteristic of the family Notopteridae. Note particularly the abdominal scutes, abdominal ribs, elongate second and third true ribs (perhaps abdominal ribs and true ribs that have fused), anal scutes and an enlarged proximal radial of the first anal pterygiophore. The abdominal ribs develop like true ribs and may fuse to the true ribs; the autogenous abdominal ribs are marked with arrows. There is a small cartilaginous element that is developed posterior to the last ossified abdominal rib, which likely is the fifth autogenous abdominal rib. B, close-up of pelvic fin region showing details of the pelvic girdle, abdominal scutes and the proximal radial of the first anal pterygiophore. Note that the abdominal and anal scutes are both paired structures.
Figure 33 in Comparative osteology and phylogenetic systematics of fossil and living bony-tongue fishes (Actinopterygii, Teleostei, Osteoglossomorpha)
Figure 33. Some elements of the left branchial arches of A, Heterotis niloticus (UMA F10653, 75 mm SL) and B, Pantodon buchholzi (FMNH 63752, 74 mm SL) in dorsal and medial views showing position of the accessory cartilages associated with the fourth and fifth branchial arches. Gill rakers omitted. Cartilage shown in black. Anterior facing right.
Figure 8 in Description of a new Eocene osteoglossid fish and additional information on †Singida jacksonoides Greenwood and Patterson, 1967 (Osteoglossomorpha), with an assessment of their phylogenetic relationships
Figure 8. Cladograms of the Osteoglossidae with nonoverlapping taxa removed, from the reanalysis of data in (A) Hilton (2003), (B) Li et al. (1997b). † fossil taxa.
Figure 2 in Description of a new Eocene osteoglossid fish and additional information on †Singida jacksonoides Greenwood and Patterson, 1967 (Osteoglossomorpha), with an assessment of their phylogenetic relationships
Figure 2. Reconstruction of †Chauliopareion mahengeense gen. et sp. nov., based on WM 492/96b. Scale bar = 1 cm.
Figure 3 in Description of a new Eocene osteoglossid fish and additional information on †Singida jacksonoides Greenwood and Patterson, 1967 (Osteoglossomorpha), with an assessment of their phylogenetic relationships
Figure 3. Reconstruction of the head of †Chauliopareion mahengeense gen. et sp. nov., based on several specimens. Scale bar = 1 cm.
Figure 1 in Description of a new Eocene osteoglossid fish and additional information on †Singida jacksonoides Greenwood and Patterson, 1967 (Osteoglossomorpha), with an assessment of their phylogenetic relationships
Figure 1. †Chauliopareion mahengeense gen. et sp. nov. A, holotype WM 490/96. B, paratype WM 311/96. Scale bars = 1 cm.
Figure 5 in Ontogeny and homology of the basipterygoid articulation in Pantodon buchholzi (Teleostei: Osteoglossomorpha)
Figure 5. SEMs of parasphenoid (A, B) and endopterygoid (C, D) of 57.0 mm Pantodon buchholzi. A, ventral view. B, posterior and slightly ventral view. C, posterior and slightly medial view on the internal face. D, dorsal view of the articular groove.
Figure 1 in Ontogeny and homology of the basipterygoid articulation in Pantodon buchholzi (Teleostei: Osteoglossomorpha)
Figure 1. Left hyopalatine arch of 4.2 mm Pantodon buchholzi, lateral view. Note clear separation of palatoquadrate and pars hyomandibularis.
Figure 3 in Ontogeny and homology of the basipterygoid articulation in Pantodon buchholzi (Teleostei: Osteoglossomorpha)
Figure 3. Neurocranium and left hyopalatine arch of Pantodon buchholzi, ventral view. A, 5.3 mm. B, 7.0 mm (parasphenoid tooth arrowed). C, 11.5 mm. D, 13.5 mm. E, 17.5 mm. F, 57.0 mm.
A Paleocene (Danian) marine osteoglossid (Teleostei, Osteoglossomorpha) from the Nuussuaq Basin of Greenland, with a brief review of Palaeogene marine bonytongue fishes
The early Palaeogene represents a key interval in the evolution of modern marine fish faunas. Together with the first appearances of many familiar fish lineages characteristic of contemporary marine environments, early Palaeogene marine deposits worldwide feature the occurrence of osteoglossid bonytongues. Their presence in marine rocks is surprising, as these fishes are strictly associated with freshwater environments in modern settings and other parts of the fossil record. Despite its possible relevance to faunal recovery after the K–Pg extinction, this marine osteoglossid radiation is relatively understudied. Here we describe an osteoglossid specimen from marine Danian deposits of western Greenland (Eqalulik Formation, northern Nuussuaq Peninsula). It consists of disarticulated cranial, pectoral and vertebral material belonging to a relatively large-bodied predator, similar to the widespread †Brychaetus but with some distinctive features. This specimen expands the geographic range of extinct osteoglossids to the Arctic and represents one of the earliest records of this group in marine deposits. We review other fossil occurrences of marine osteoglossids, highlighting temporal and biogeographic patterns that characterize their rise, diversification and sudden disappearance in the middle Eocene. It is likely that the transition from freshwater to marine environments occurred around the K–Pg boundary, possibly related to ecological replacement of predatory fish lineages that went extinct at the end of the Cretaceous. Further study of the Eqalulik Formation fauna could yield additional insight into the consequences of the end-Cretaceous extinction on marine fish evolution and on the assembly of modern marine faunas.
A new genome of an African weakly electric fish (Campylomormyrus compressirostris, Mormyridae) indicates rapid gene family evolution in Osteoglossomorpha
Background <p>Teleost fishes comprise more than half of the vertebrate species. Within teleosts, most phylogenies consider the split between Osteoglossomorpha and Euteleosteomorpha/Otomorpha as basal, preceded only by the derivation of the most primitive group of teleosts, the Elopomorpha. While Osteoglossomorpha are generally species-poor, the taxon contains the African weakly electric fish (Mormyroidei), which have radiated into numerous species. Within the mormyrids, the genus <em>Campylomormyrus</em> is mostly endemic to the Congo Basin. <em>Campylomormyrus</em> serves as a model to understand mechanisms of adaptive radiation and ecological speciation, especially with regard to its highly diverse species-specific electric organ discharges (EOD). Currently, there are few well-annotated genomes available for electric fish in general and mormyrids in particular. Our study aims at producing a high-quality genome and to use this to examine genome evolution in relation to other teleosts. This will facilitate further understanding of the evolution of the osteoglossomorph fish in general and of electric fish in particular.</p> Results <p>A high-quality weakly electric fish (<em>C. compressirostris</em>) genome was produced from a single individual with a genome size of 862Mb, consisting of 1,497 contigs with an N50 of 1,399 kb and a GC-content of 43.69%. Gene predictions identified 34,492 protein-coding genes, which is a higher number than in the two other available Osteoglossomorpha genomes of <em>Paramormyrops</em> <em>kingsleyae</em> and <em>Scleropages</em> <em>formosus</em>. A CAFE5 analysis of gene family evolution comparing 33 teleost fish genomes suggests an overall faster gene family turnover rate in Osteoglossomorpha than in Otomorpha and Euteleosteomorpha. Moreover, the ratios of expanded/contracted gene family numbers in Osteoglossomorpha are significantly higher than in the other two taxa, except for species that had undergone an additional genome duplication (<em>Cyprinus</em> <em>carpio</em> and <em>Oncorhynchus</em> <em>mykiss</em>). As potassium channel proteins are hypothesized to play a key role in EOD diversity among species, we put a special focus on them, and manually curated 16 Kv1 genes. We identified a tandem duplication in the KCNA7a gene in the genome of <em>C</em>. <em>compressirostris</em>.</p> Conclusions <p>We present the fourth genome of an electric fish and the third well-annotated genome for Osteoglossomorpha, enabling us to compare gene family evolution among major teleost lineages. Osteoglossomorpha appears to exhibit rapid gene family evolution, with more gene family expansions than contractions. The curated Kv1 gene family showed seven gene clusters, which is more than in other analyzed fish genomes outside Osteoglossomorpha. The KCNA7a, encoding for a potassium channel central for EOD production and modulation, is tandemly duplicated which may related to the diverse EOD observed among <em>Campylomormyrus</em> species.</p>
A new genome of an African weakly electric fish (Campylomormyrus compressirostris, Mormyridae) indicates rapid gene family evolution in Osteoglossomorpha
Open the record for dataset details and reuse information.
A Paleocene (Danian) marine osteoglossid (Teleostei, Osteoglossomorpha) from the Nuussuaq Basin of Greenland, with a brief review of Palaeogene marine bonytongue fishes
Open the record for dataset details and reuse information.
FIGURE 9 in A new Stomatorhinus (Osteoglossomorpha: Mormyridae) from the Ivindo River, Gabon, West Central Africa
FIGURE 9. Waveforms and power spectra of EODs from Stomatorhinus walkeri (A – D), S. ater (E, F) and S. patrizii (G, H) on the same time scale as those shown in Fig. 5. EOD waveforms are centered about the largest headnegative peak, normalized to the same peaktopeak height and plotted with head positivity upward for each trace. Power spectra are normalized so that the peak energy is adjusted to 0 dB. Individual specimen numbers are indicated beneath waveforms; F = female, M = male.
FIGURE 7 in A new Stomatorhinus (Osteoglossomorpha: Mormyridae) from the Ivindo River, Gabon, West Central Africa
FIGURE 7. Selected morphometric ratios of S. ivindoensis n. sp. compared to those in S. fuliginosus (A) and S. polli (B). IO = interorbital distance, HW = head width, CPD = caudal peduncle depth measured at terminus of anal fin, CPL = caudal peduncle length, E = eye diameter, HL = head length.
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.