Blar i Bergen Open Research Archive på forfatter "Hejnol, Andreas"
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Increased taxon sampling reveals thousands of hidden orthologs in flatworms
Martin Duran, Jose Maria; Ryan, Joseph Francis; Vellutini, Bruno Cossermelli; Pang, Kevin Scott; Hejnol, Andreas (Journal article; Peer reviewed, 2017)Gains and losses shape the gene complement of animal lineages and are a fundamental aspect of genomic evolution. Acquiring a comprehensive view of the evolution of gene repertoires is limited by the intrinsic limitations ... -
The larval nervous system of the penis worm Priapulus caudatus (Ecdysozoa)
Martin-Duran, José M.; Wolff, Gabriella H; Strausfeld, Nicholas J; Hejnol, Andreas (Journal article; Peer reviewed, 2016-01)The origin and extreme diversification of the animal nervous system is a central question in biology. While most of the attention has traditionally been paid to those lineages with highly elaborated nervous systems (e.g. ... -
The localization of Toll and Imd pathway and complement system components and their response to Vibrio infection in the nemertean Lineus ruber
Orus Alcalde, Andrea; Børve, Aina; Hejnol, Andreas (Journal article; Peer reviewed, 2023)Background Innate immunity is the first line of defense against pathogens. In animals, the Toll pathway, the Imd pathway, the complement system, and lectins are well-known mechanisms involved in innate immunity. Although ... -
Marine animal evolutionary developmental biology—Advances through technology development
Stracke, Katharina; Hejnol, Andreas (Journal article; Peer reviewed, 2022)Evolutionary developmental biology, the interdisciplinary effort of illuminating the conserved similarities and differences during animal development across all phylogenetic clades, has gained renewed interest in the past ... -
Mesodermal gene expression during the embryonic and larval development of the articulate brachiopod Terebratalia transversa
Passamaneck, Yale J.; Hejnol, Andreas; Martindale, Mark Q. (Journal article; Peer reviewed, 2015-04-11)Background: Brachiopods undergo radial cleavage, which is distinct from the stereotyped development of closely related spiralian taxa. The mesoderm has been inferred to derive from the archenteron walls following gastrulation, ... -
Molecular and morphological analysis of the developing nemertean brain indicates convergent evolution of complex brains in Spiralia
Gasiorowski, Ludwik; Børve, Aina; Cherneva, Irina A; Orus Alcalde, Andrea; Hejnol, Andreas (Journal article; Peer reviewed, 2021)Background The brain anatomy in the clade Spiralia can vary from simple, commissural brains (e.g., gastrotrichs, rotifers) to rather complex, partitioned structures (e.g., in cephalopods and annelids). How often and in ... -
Molecular evidence for a single origin of ultrafiltration-based excretory organs
Gasiorowski, Ludwik; Andrikou, Carmen; Bump, Paul; Lowe, Christopher J.; Janssen, Ralf; Budd, Graham E.; Hejnol, Andreas (Journal article; Peer reviewed, 2021)Excretion is an essential physiological process, carried out by all living organisms, regardless of their size or complexity.1, 2, 3 Both protostomes (e.g., flies and flatworms) and deuterostomes (e.g., humans and sea ... -
Molecular patterning during the development of Phoronopsis harmeri reveals similarities to rhynchonelliform brachiopods
Andrikou, Carmen; Passamaneck, Yale J; Lowe, Christopher J.; Martindale, Mark Q.; Hejnol, Andreas (Journal article; Peer reviewed, 2019)Background: Phoronids, rhynchonelliform and linguliform brachiopods show striking similarities in their embryonic fate maps, in particular in their axis specification and regionalization. However, although brachiopod ... -
Molecular regionalization in the compact brain of the meiofaunal annelid Dinophilus gyrociliatus (Dinophilidae)
Kerbl, Alexandra; Martín-Durán, José M.; Worsaae, Katrine; Hejnol, Andreas (Journal article; Peer reviewed, 2016-08-30)Background: Annelida is a morphologically diverse animal group that exhibits a remarkable variety in nervous system architecture (e.g., number and location of longitudinal cords, architecture of the brain). Despite this ... -
Morphology of the nervous system of monogonont rotifer Epiphanes senta with a focus on sexual dimorphism between feeding females and dwarf males
Gasiorowski, Ludwik; Furu, Anlaug; Hejnol, Andreas (Peer reviewed; Journal article, 2019-08-07)Background: Monogononta is a large clade of rotifers comprised of diverse morphological forms found in a wide range of ecological habitats. Most monogonont species display cyclical parthenogenesis, where generations of ... -
A nemertean excitatory peptide/CCHamide regulates ciliary swimming in the larvae of Lineus longissimus
Thiel, Daniel; Bauknecht, Philipp; Jékely, Gáspár; Hejnol, Andreas (Journal article; Peer reviewed, 2019-07-10)Background The trochozoan excitatory peptide (EP) and its ortholog, the arthropod CCHamide, are neuropeptides that are only investigated in very few animal species. Previous studies on different trochozoan species focused ... -
Nuclear genomic signals of the “microturbellarian” roots of platyhelminth evolutionary innovation
Laumer, Christopher E.; Hejnol, Andreas; Giribet, Gonzalo (Journal article; Peer reviewed, 2015-03-12)Flatworms number among the most diverse invertebrate phyla and represent the most biomedically significant branch of the major bilaterian clade Spiralia, but to date, deep evolutionary relationships within this group have ... -
Pairwise comparisons across species are problematic when analyzing functional genomic data
Dunn, Casey W.; Zapata, Felipe; Munro, Catriona; Siebert, Stefan; Hejnol, Andreas (Journal article; Peer reviewed, 2018-01-04)There is considerable interest in comparing functional genomic data across species. One goal of such work is to provide an integrated understanding of genome and phenotype evolution. Most comparative functional genomic ... -
Peripheral and central employment of acid-sensing ion channels during early bilaterian evolution
Marti Solans, Josep; Børve, Aina; Bump, Paul; Hejnol, Andreas; Lynagh, Timothy Peter (Journal article; Peer reviewed, 2023)Nervous systems are endowed with rapid chemosensation and intercellular signaling by ligand-gated ion channels (LGICs). While a complex, bilaterally symmetrical nervous system is a major innovation of bilaterian animals, ... -
The study of Priapulus caudatus reveals conserved molecular patterning underlying different gut morphogenesis in the Ecdysozoa
Martin Duran, Jose Maria; Hejnol, Andreas (Journal article; Peer reviewed, 2015-04-21)Background The digestive systems of animals can become highly specialized in response to their exploration and occupation of new ecological niches. Although studies on different animals have revealed commonalities in gut ... -
Xenacoelomorpha's significance for understanding bilaterian evolution
Hejnol, Andreas; Pang, Kevin Scott (Journal article; Peer reviewed, 2016-08)The Xenacoelomorpha, with its phylogenetic position as sister group of the Nephrozoa (Protostomia + Deuterostomia), plays a key-role in understanding the evolution of bilaterian cell types and organ systems. Current studies ...