Results 1 to 10 of about 1,321 (169)

The Complement System of Agnathans [PDF]

open access: yesFrontiers in Immunology, 2018
Agnathans (lamprey and hagfish) are a group of primitive jawless fish. Jawed vertebrates possess adaptive immunity including immunoglobulins, while agnathans lack immunoglobulins but have alternative adaptive immunity in which variable lymphocyte ...
Misao Matsushita
exaly   +5 more sources

Revision of Silurian vertebrate biozones and their correlation with the conodont succession [PDF]

open access: yesEstonian Journal of Earth Sciences, 2013
The first vertebrate-based subdivisions of Silurian strata were mainly drawn on material from outcrops in Britain and drill cores from the southern Baltic.
Tiiu Märss, Peep Männik
doaj   +4 more sources

Evolution of the brain developmental plan: Insights from agnathans

open access: yesDevelopmental Biology, 2005
In vertebrate evolution, the brain exhibits both conserved and unique morphological features in each animal group. Thus, the molecular program of nervous system development is expected to have experienced various changes through evolution. In this review, we discuss recent data from the agnathan lamprey (jawless vertebrate) together with available ...
Yasunori Murakami   +2 more
exaly   +3 more sources

Expression of Urocortin 3 mRNA in the Central Nervous System of the Sea Lamprey Petromyzon marinus

open access: yesBiology, 2021
In this study, we analyzed the organization of urocortin 3 (Ucn3)-expressing neuronal populations in the brain of the adult sea lamprey by means of in situ hybridization.
Daniel Sobrido-Cameán   +2 more
doaj   +1 more source

Emergence of the Synucleins

open access: yesBiology, 2023
This study establishes the origin and evolutionary history of the synuclein genes. A combination of phylogenetic analyses of the synucleins from twenty-two model species, characterization of local synteny similarities among humans, sharks and lampreys ...
Ignacio Marín
doaj   +1 more source

Hydrodynamic performance of psammosteids: New insights from computational fluid dynamics simulations [PDF]

open access: yesActa Palaeontologica Polonica, 2019
The shape of dermal armor protecting the body in the Paleozoic agnathans such as the Heterostaci has an important hydrodynamic role in providing lift or drag force generation.
Marek Dec
doaj   +1 more source

Asia–Gondwana connections indicated by Devonian fishes from Australia: palaeogeographic considerations

open access: yesJournal of Palaeogeography, 2020
Middle Palaeozoic vertebrate fossil occurrences are summarised for Australia, with reference to faunal connections between Asia and East Gondwana, as first indicated by fish distributions of Lower Devonian fossil sites. Major endemic groups discussed are
Gavin Charles Young, Jing Lu
doaj   +1 more source

The Natterin Proteins Diversity: A Review on Phylogeny, Structure, and Immune Function

open access: yesToxins, 2021
Since the first record of the five founder members of the group of Natterin proteins in the venom of the medically significant fish Thalassophryne nattereri, new sequences have been identified in other species.
Carla Lima   +7 more
doaj   +1 more source

The Functional Anatomy of the Cornea and Anterior Chamber in Lampreys: Insights From the Pouched Lamprey, Geotria australis (Geotriidae, Agnatha)

open access: yesFrontiers in Neuroanatomy, 2021
Extant lampreys (Petromyzontiformes) are one of two lineages of surviving jawless fishes or agnathans, and are therefore of critical importance to our understanding of vertebrate evolution.
H. Barry Collin   +3 more
doaj   +1 more source

Cloning of the gabaB Receptor Subunits B1 and B2 and their Expression in the Central Nervous System of the Adult Sea Lamprey

open access: yesFrontiers in Neuroanatomy, 2016
In vertebrates, γ-aminobutyric acid (GABA) is the main inhibitory transmitter in the central nervous system acting through ionotropic (GABAA) and metabotropic (GABAB) receptors.
Daniel Romaus-Sanjurjo   +4 more
doaj   +1 more source

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