Bruno Cossermelli Vellutini

Bruno Cossermelli Vellutini
Max Planck Institute of Molecular Cell Biology and Genetics | MPI-CBG

PhD

About

39
Publications
13,908
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631
Citations
Additional affiliations
November 2011 - March 2016
University of Bergen
Position
  • PhD Student

Publications

Publications (39)
Article
Full-text available
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 forms, including the iconic pilidium. A pelagic planktotrophic pilidium is the ancestral form in the Pilidiophora, but severa...
Article
Full-text available
Sea biscuits and sand dollars diverged from other irregular echinoids approximately 55 million years ago and rapidly dispersed to oceans worldwide. A series of morphological changes were associated with the occupation of sand beds such as flattening of the body, shortening of primary spines, multiplication of podia, and retention of the lantern of...
Article
Full-text available
Notothenia coriiceps (Cabeçuda) is an Antarctic benthic fish frequently found with lesions in the tegument caused by seal predation. We have investigated epidermal repair in these animals by means of a microscopic study of experimental wound healing at 0 degrees C. At 24--48 h after wound induction, mucous exudate and necrotic lining cells covered...
Article
Full-text available
Notothenia coriiceps were kept at 02C. Following anaesthesia, a square excision (4cm2) was made on the dorsal lateral anterior regions on both sides. The process of wound healing was monitored after 0, 1, 2, 7, 15, 23, 60 and 90days. The wounds were processed for scanning electron microscopy. Following surgery, haemorrhage was abundant; after 24–48...
Article
Invertebrates protect themselves against microbial infection through cellular and humoral immune defenses. Since the available information on the immune system of spiders is scarce, the main goal of the present study was to investigate the role of hemocytes and antimicrobial peptides (AMPs) in defense against microbes of spider Acanthoscurria gomes...
Article
Full-text available
A Correction to this paper has been published: https://doi.org/10.1038/s41559-020-01327-6.
Article
Full-text available
The causes and consequences of genome reduction in animals are unclear because our understanding of this process mostly relies on lineages with often exceptionally high rates of evolution. Here, we decode the compact 73.8-megabase genome of Dimorphilus gyrociliatus, a meiobenthic segmented worm. The D. gyrociliatus genome retains traits classically...
Preprint
Full-text available
Animal genomes vary in size by orders of magnitude. While genome size expansion relates to transposable element mobilisation and polyploidisation, the causes and consequences of genome reduction are unclear. This is because our understanding of genome compaction relies on animals with extreme lifestyles, such as parasites, and free-living animals w...
Chapter
Animals are fascinating in many ways. For centuries scientists have tried to understand animal evolution. How did animals first evolve? How are they related to one another? How is the genotype—the genetic information contained in their DNA—translated into form and function? How do embryonic cells build tissues and organs? What is the biological bas...
Article
Full-text available
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 to specific receptors on neighbouring cells and thereby establish cell-to-cell communication. In segmented animals such as ann...
Book
Animal evolution has always been at the core of Biology, but even today many fundamental questions remain open. The field of animal ‘evo-devo’ is leveraging recent technical and conceptual advances in development, paleontology, genomics and transcriptomics to propose radically different answers to traditional evolutionary controversies. This book...
Article
Full-text available
Background: Stereotypic cleavage patterns play a crucial role in cell fate determination by precisely positioning early embryonic blastomeres. Although misplaced cell divisions can alter blastomere fates and cause embryonic defects, cleavage patterns have been modified several times during animal evolution. However, it remains unclear how evolution...
Article
Full-text available
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 of common sequence similarity searches and available databases. Thus, a subset of the gene complement of an organism consists of...
Article
Full-text available
Temporal collinearity is often considered the main force preserving Hox gene clusters in animal genomes. Studies that combine genomic and gene expression data are scarce, however, particularly in invertebrates like the Lophotrochozoa. As a result, the temporal collinearity hypothesis is currently built on poorly supported foundations. Here we chara...
Preprint
Full-text available
Stereotypic cleavage patterns play a crucial role in cell fate determination by precisely positioning early embryonic blastomeres. Although misplaced cell divisions can alter blastomere fates and cause embryonic defects, cleavage patterns have changed several times during animal evolution. Here, we analyze the evolutionary transition from spiral cl...
Article
Larval stages can be astonishingly different from their adult forms. A new study in acorn worms shows that the whole larval body is patterned only with a subset of anterior genes, revealing the intricate developmental bases that underlie the evolution of larval forms.
Article
Full-text available
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 chirality controlled by cytoskeleton dynamics and the subsequent differential activation of the genes nodal and Pitx determine the...
Article
Full-text available
The diverse and complex developmental mechanisms of segmentation have been more thoroughly studied in arthropods, vertebrates and annelids-distantly related animals considered to be segmented. Far less is known about the role of "segmentation genes" in organisms that lack a segmented body. Here we investigate the expression of the arthropod segment...
Preprint
Full-text available
Temporal collinearity is often regarded as the force preserving Hox clusters in vertebrate genomes. Studies that combine genomic and gene expression data in invertebrates would allow generalizing this observation across all animals, but are scarce, particularly within Lophotrochozoa (e.g., snails and segmented worms). Here, we use two brachiopod sp...
Preprint
Full-text available
The diverse and complex developmental mechanisms of segmentation have been more thoroughly studied in arthropods, vertebrates and annelids—distantly related animals considered to be segmented. Far less is known about the role of “segmentation genes” in organisms that lack a segmented body. Here we investigate the expression of the arthropod segment...
Article
Full-text available
The position of Xenacoelomorpha in the tree of life remains a major unresolved question in the study of deep animal relationships. Xenacoelomorpha, comprising Acoela, Nemertodermatida, and Xenoturbella, are bilaterally symmetrical marine worms that lack several features common to most other bilaterians, for example an anus, nephridia, and a circula...
Article
Full-text available
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 forms, including the iconic pilidium. A pelagic planktotrophic pilidium is the ancestral form in the Pilidiophora, but several...
Article
M.Sc. thesis on the development and reproduction of the sea biscuit Clypeaster subdepressus. Text is in portuguese. Original title: "Desenvolvimento e ciclo reprodutivo da bolacha-do-mar Clypeaster subdepressus (Echinodermata: Echinoidea) de São Sebastião, SP" Developmental chapter was published in PLOS ONE http://www.plosone.org/article/info:doi/1...
Data
Esophagus initial contractions of a pre-feeding early pluteus larva. (0.89 MB AVI)
Data
Pluteus larvae with a well-developed rudiment exhibiting the “substrate test behavior”. Larvae open the arms exposing the rudiment while podia touches the substrate. If metamorphosis is not initiated larvae can resume swimming. (5.98 MB AVI)
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Main and accessory papillae of a male sea biscuit Clypeaster subdepressus releasing sperm. (1.38 MB AVI)
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Elevation of the fertilization membrane after sperm entry, pronuclei migration, and initial clevages of Clypeaster subdepressus. (5.36 MB AVI)
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Pre-feeding early pluteus larva rejecting microalgae. (0.35 MB AVI)
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Metamorphosis of the sea biscuit Clypeaster subdepressus. (2.00 MB AVI)
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Activity and locomotion of postlarval and feeding juveniles. (5.24 MB AVI)
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Female of the sea biscuit Clypeaster subdepressus releasing eggs through the gonopore papilla. (1.43 MB AVI)
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Movements of the lantern of Aristotle, the peristome, and the esophagus of a Clypeaster subdepressus feeding juvenile. (2.60 MB AVI)
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Frontal view of a pluteus larva of Clypeaster subdepressus reconstructed from differential interference contrast image-sequence. A Grayscale reconstruction showing the position of the arms. B Red-Cyan 3D image of the same pluteus larva. Scale bar = 50 µm (5.02 MB TIF)
Data
Feeding juvenile manipulating a tiny sand grain with podia and peristome. (2.99 MB AVI)

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