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Development of the aboral domain in Nematostella requires β-catenin and the opposing activities of Six3/6 and Frizzled5/8
(Journal article; Peer reviewed, 2016-03)The development of the oral pole in cnidarians and the posterior pole in bilaterians is regulated by canonical Wnt signaling, whereas a set of transcription factors, including Six3/6 and FoxQ2, controls aboral development ... -
Development of the larval anterior neurogenic domains of Terebratalia transversa (Brachiopoda) provides insights into the diversification of larval apical organs and the spiralian nervous system
(Peer reviewed; Journal article, 2012-01-24)Background: Larval features such as the apical organ, apical ciliary tuft, and ciliated bands often complicate the evaluation of hypotheses regarding the origin of the adult bilaterian nervous system. Understanding how ... -
Developmental diversity in free-living flatworms
(Journal article; Peer reviewed, 2012-03-19)Abstract Flatworm embryology has attracted attention since the early beginnings of comparative evolutionary biology. Considered for a long time the most basal bilaterians, the Platyhelminthes (excluding Acoelomorpha) are ... -
Developmental expression of “germline”- and “sex determination”-related genes in the ctenophore Mnemiopsis leidyi
(Journal article; Peer reviewed, 2016-08-02)Background: An essential developmental pathway in sexually reproducing animals is the specification of germ cells and the differentiation of mature gametes, sperm and oocytes. The “germline” genes vasa, nanos ... -
A developmental role for the chromatin-regulating CoREST complex in the cnidarian Nematostella vectensis
(Journal article; Peer reviewed, 2022)Background Chromatin-modifying proteins are key players in the regulation of development and cell differentiation in animals. Most chromatin modifiers, however, predate the evolution of animal multicellularity, and how ... -
Diversity and host associations of Myrsidea chewing lice (Phthiraptera: Menoponidae) in the tropical rainforest of Malaysian Borneo
(Journal article; Peer reviewed, 2020)The tropical rainforests of Sundaland are a global biodiversity hotspot increasingly threatened by human activities. While parasitic insects are an important component of the ecosystem, their diversity and parasite-host ... -
Early evolution of radial glial cells in Bilateria
(Journal article; Peer reviewed, 2017)Bilaterians usually possess a central nervous system, composed of neurons and supportive cells called glial cells. Whereas neuronal cells are highly comparable in all these animals, glial cells apparently differ, and in ... -
Embracing the comparative approach: How robust phylogenies and broader developmental sampling impacts the understanding of nervous system evolution
(Journal article; Peer reviewed, 2015-11-09)Molecular biology has provided a rich dataset to develop hypotheses of nervous system evolution. The startling patterning similarities between distantly related animals during the development of their central nervous system ... -
Embryonic chirality and the evolution of spiralian left - right asymmetries
(Journal article; Peer reviewed, 2016-12)The group Spiralia includes species with one of the most significant cases of left–right asymmetries in animals: the coiling of the shell of gastropod molluscs (snails). In this animal group, an early event of embryonic ... -
Embryonic expression of endogenous retroviral RNAs in somatic tissues adjacent to the Oikopleura germline
(Journal article; Peer reviewed, 2015)Selective pressure to maintain small genome size implies control of transposable elements, and most old classes of retrotransposons are indeed absent from the very compact genome of the tunicate Oikopleura dioica. Nonetheless, ... -
Embryonic expression of priapulid Wnt genes
(Journal article; Peer reviewed, 2019-07)Posterior elongation of the developing embryo is a common feature of animal development. One group of genes that is involved in posterior elongation is represented by the Wnt genes, secreted glycoprotein ligands that signal ... -
Evolution and development of the adelphophagic, intracapsular Schmidt's larva of the nemertean Lineus ruber
(Journal article; Peer reviewed, 2015-09-28)Background: The life cycle of many animals includes a larval stage, which has diversified into an astonishing variety of ecological strategies. The Nemertea is a group of spiralians that exhibits a broad diversity of larval ... -
Evolution of CDK1 Paralog Specializations in a Lineage With Fast Developing Planktonic Embryos
(Journal article; Peer reviewed, 2022-01-28)The active site of the essential CDK1 kinase is generated by core structural elements, among which the PSTAIRE motif in the critical αC-helix, is universally conserved in the single CDK1 ortholog of all metazoans. We report ... -
Evolution of eumetazoan nervous systems: Insights from cnidarians
(Journal article; Peer reviewed, 2015-12-19)Cnidarians, the sister group to bilaterians, have a simple diffuse nervous system. This morphological simplicity and their phylogenetic position make them a crucial group in the study of the evolution of the nervous system. ... -
Evolution of the Pax-Six-Eya-Dach network: The calcisponge case study
(Journal article; Peer reviewed, 2014-06-23)Background: The Pax-Six-Eya-Dach network (PSEDN) is involved in a variety of developmental processes, including well documented roles in determination of sensory organs and morphogenesis in bilaterian animals. Expression ... -
Evolutionarily conserved aspects of animal nutrient uptake and transport in sea anemone vitellogenesis
(Journal article; Peer reviewed, 2022)The emergence of systemic nutrient transport was a key challenge during animal evolution, yet it is poorly understood. Circulatory systems distribute nutrients in many bilaterians (e.g., vertebrates and arthropods) but are ... -
Evolutionary and behavioral analysis of neuropeptides in bilaterians
(Doctoral thesis, 2017-06-29)Neuropeptides are a diverse group of neurosecretory signaling molecules that are utilized by the nervous system of all bilaterian animals. These signaling molecules are involved in most physiological processes and can play ... -
Evolutionary Implications of the microRNA- and piRNA Complement of Lepidodermella squamata (Gastrotricha)
(Journal article; Peer reviewed, 2019-02-22)Gastrotrichs—’hairy bellies’—are microscopic free-living animals inhabiting marine and freshwater habitats. Based on morphological and early molecular analyses, gastrotrichs were placed close to nematodes, but recent ... -
The Evolving Proteome of a Complex Extracellular Matrix, the Oikopleura House
(Peer reviewed; Journal article, 2012-07-05)Extracellular matrices regulate biological processes at the level of cells, tissues, and in some cases, entire multicellular organisms. The subphylum Urochordata exemplifies the latter case, where animals are partially or ... -
Exciting times to study the identity and evolution of cell types
(Journal article, 2019)The EMBO/EMBL Symposium on ‘The Identity and Evolution of Cell Types’ took place in Heidelberg, Germany, on 15-19 May 2019. The symposium, which brought together a diverse group of speakers addressing a wide range of ...