A5049413414- Planarian Biology and Electrostimulation
- Marine Biology and Ecology Research
- Parasite Biology and Host Interactions
- Protist diversity and phylogeny
- Marine Ecology and Invasive Species
- Cephalopods and Marine Biology
- Environmental DNA in Biodiversity Studies
- Marine Invertebrate Physiology and Ecology
- Marine and coastal plant biology
- Genetics, Aging, and Longevity in Model Organisms
- Microbial Community Ecology and Physiology
- Invertebrate Taxonomy and Ecology
- Nematode management and characterization studies
- Plant and Biological Electrophysiology Studies
- Marine and environmental studies
- Echinoderm biology and ecology
- Neurobiology and Insect Physiology Research
- Isotope Analysis in Ecology
- Insect and Arachnid Ecology and Behavior
- Methane Hydrates and Related Phenomena
- Environmental Policies and Emissions
- Genetic diversity and population structure
- Genomics and Phylogenetic Studies
- Aquatic Invertebrate Ecology and Behavior
- Tardigrade Biology and Ecology
Swedish Museum of Natural History
2015-2025
Stockholm University
1999-2023
Finnish Museum of Natural History
2018
University of Gothenburg
1986-2017
University of Basel
2017
Uppsala University
2000-2007
Hasselt University
2005
Institute of Natural Sciences
2005
Natural History Museum
2005
Zoological Institute
2003
A clear picture of animal relationships is a prerequisite to understand how the morphological and ecological diversity animals evolved over time. Among others, placement acoelomorph flatworms, Acoela Nemertodermatida, has fundamental implications for origin evolution various organ systems. Their position, however, been inconsistent in phylogenetic studies using one or several genes. Furthermore, among least stable taxa recent phylogenomic analyses, which simultaneously examine many genes...
This paper identifies the top-50 priority questions for meiofaunal research, highlighting their critical roles in biogeochemical cycles and biodiversity. It calls a balanced research agenda, international cooperation, advances technology to overcome current challenges unlock meiofauna's full potential.
Bilateria are currently subdivided into three superclades: Deuterostomia, Ecdysozoa, and Lophotrochozoa. Within this new taxonomic frame, acoelomate Platyhelminthes, for a long time held to be basal bilaterians, now considered spiralian lophotrochozoans. However, recent 18S rDNA [small subunit (SSU)] analyses have shown Platyhelminthes polyphyletic with two of its orders, the Acoela Nemertodermatida, as earliest extant bilaterians. To corroborate such position avoid criticisms saturation...
Background Biogeographical and macroecological principles are derived from patterns of distribution in large organisms, whereas microscopic ones have often been considered uninteresting, because their supposed wide distribution. Here, after reporting the results an intensive faunistic survey marine animals (meiofauna) Northern Sardinia, we test for effect body size, dispersal ability, habitat features on several groups. Methodology/Principal Findings As a dataset use workshop held at La...
Two new species of marine Platyhelminthes, Microstomum laurae sp. nov. and edmondi (Macrostomida: Microstomidae) are described from the west coast Sweden. is distinguished by following combination characters: rounded anterior posterior ends; presence approximately 20 adhesive papillae on rim; paired lateral red eyespots located level with brain; preoral gut extending to brain very small sensory pits. a protandrous hermaphrodite single ovary, testis male copulatory organ stylet. It...
Recent hypotheses on metazoan phylogeny have recognized three main clades of bilaterian animals: Deuterostomia, Ecdysozoa and Lophotrochozoa. The acoelomate ‘pseudocoelomate’ metazoans, including the Platyhelminthes, long considered basal bilaterians, been referred to positions within these by many authors. However, a recent study based ribosomal DNA placed flatworm group Acoela as sister all other extant lineages. Unexpectedly, nemertodermatid flatworms, usually together forming...
The transition to a vermiform body shape is one of the most important events in animal evolution, having led impressive radiation Bilateria. However, sister group Bilateria has remained obscure. Cladistic analyses morphology indicate that Ctenophora Previous SSU rRNA sequences have yielded conflicting results; many studies forms Cnidaria + Bilateria, but others ctenophores with poriferans. Here we re-examine sequence by analyzing dataset 528 metazoan outgroup sequences, including almost 120...
Some taxonomic groups are less amenable to mitochondrial DNA barcoding than others. Due the paucity of molecular information understudied and huge diversity within flatworms, primer design has been hampered. Indeed, all attempts develop universal flatworm-specific COI markers have failed so far. We demonstrate how high variability contamination problems limit possibilities for using standard COI-based protocols in flatworms. As a consequence, identification methods often rely on other widely...
Abstract Whereas most work to understand impacts of humans on biodiversity coastal areas has focused large, conspicuous organisms, we highlight effects tourist access the diversity microscopic marine animals (meiofauna). We used a DNA metabarcoding approach with an iterative and phylogeny-based for taxonomic assignment meiofauna relate patterns numbers tourists accessing sandy beaches otherwise un-impacted island National Park. Tourist frequentation, independently differences in sediment...
Accurate assessments of biodiversity are crucial to advising ecosystem-monitoring programs and understanding ecosystem function. Nevertheless, a standard operating procedure assess accurately consistently has not been established. This is especially true for meiofauna, diverse community (>20 phyla) small benthic invertebrates that have fundamental ecological roles. Recent studies show metabarcoding cost-effective time-effective method estimate meiofauna biodiversity, in contrast...
Abstract Molecular techniques like metabarcoding, while promising for exploring diversity of communities, are often impeded by the lack reference DNA sequences available taxonomic annotation. Our study explores benefits combining targeted barcoding and morphological taxonomy to improve metabarcoding efficiency, using beach meiofauna as a case study. Beaches globally important ecosystems inhabited meiofauna, microscopic animals living in interstitial space between sand grains, which play key...
We used new 18S and 28S rRNA sequences analysed with parsimony, maximum likelihood Bayesian methods of phylogenetic reconstruction to show that Nemertodermatida, generally classified as the sister group Acoela within recently proposed Phylum Acoelomorpha, are a separate basal bilaterian lineage. several analytical approaches control for possible long branch attraction (LBA) artefacts in our results. Parsimony model based incorporate ‘corrections’ substitution rate heterogenities yielded...
Acoela are marine microscopic worms currently thought to be the sister taxon of all other bilaterians. Acoels have long been used as models in evolutionary scenarios, and generalized conclusions about acoel bilaterian ancestral features frequently drawn from studies single species. There is no extensive phylogenetic study taxonomy 380 species chaotic. Here we use two nuclear ribosomal genes one mitochondrial gene combination with 37 morphological characters an analysis 126 terminals (about...
Kånneby, T., Todaro, M. A., Jondelius, U. (2012). Phylogeny of Chaetonotidae and other Paucitubulatina (Gastrotricha: Chaetonotida) the colonization aquatic ecosystems. — Zoologica Scripta , 42 88–105. is largest family within Gastrotricha with almost 400 nominal species represented in both freshwater marine habitats. The group probably non‐monophyletic suffers from a troubled taxonomy. Current classification to great extent based on shape distribution cuticular structures, characters that...
Background Phylogenetic relationships within Gastrotricha are poorly known. Attempts to shed light on this subject using morphological traits have led hypotheses lacking satisfactory statistical support; it seemed therefore that a different approach was needed. Methodology/Principal Findings In paper we attempt elucidate the taxonomically vast family Thaumastodermatidae (Macrodasyida) molecular sequence data. The study includes representatives of all extant genera and for first time uses...
Complete nuclear 18S rDNA sequences from 14 species of the Prolecithophora were obtained and used, in combination with literature data, to generate first parsimony-based hypothesis phylogeny order (Platyhelminthes). Bootstrap, parsimony jack-knife, Bremer support values computed compared. The monophyly sensu stricto family Plagiostomidae is strongly supported. taxa Separata, Combinata, Plagiostomum are shown be nonmonophyletic. Cylindrostomidae Ulianinidae transferred Pseudostomidae....
Acoels are simply organized unsegmented worms, lacking hindgut and anus. Several publications over recent years challenge the long-held view that acoels early offshoots of flatworms. Instead a basal position as sister group to all other bilaterian animals was suggested, mainly based on molecular evidence. This led features might reflect those last common ancestor Bilateria, resulted in several evo-devo studies trying interpret evolution using proxy model for "Urbilateria".We describe first...
Background Within an evolutionary framework of Gastrotricha Marinellina flagellata and Redudasys fornerise bear special interest, as they are the only Macrodasyida that inhabit freshwater ecosystems. Notwithstanding, these rare animals poorly known; found once (Austria Brazil), currently systematised incertae sedis. Here we report on rediscovery fornerise, provide account morphological novelties present a hypothesis its phylogenetic relationship based molecular data. Methodology/Principal...
In this study we elaborate the phylogeny of Dalytyphloplanida based on complete 18S rDNA (156 sequences) and partial 28S (125 sequences), using a Maximum Likelihood Bayesian Inference approach, in order to investigate origin limnic or limnoterrestrial symbiotic lifestyle large group rhabditophoran flatworms. The results our phylogenetic analyses ancestral state reconstructions indicate that dalytyphloplanids have their marine environment there was one highly successful invasion freshwater...
Precision and reliability of barcode-based biodiversity assessment can be affected at several steps during acquisition analysis data. Identification operational taxonomic units (OTUs) is one the crucial in process accomplished using different approaches, namely, alignment-based, probabilistic, tree-based phylogeny-based. The number identified sequences reference databases affects precision identification. This paper compares identification marine nematode OTUs phylogeny-based approaches....