Results 161 to 170 of about 4,048 (211)
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Structure of the Proboscis Endothelium in Nemertea
Zoological Science, 2015We studied the ultrastructure of the proboscis endothelium of 14 nemertean species. In all nemerteans examined, the endothelium is organized as a pseudostratified myoepithelium consisting of two types of cells resting on the basal extracellular matrix: apically situated supportive cells and subapical myocytes covered by cytoplasmic sheets of the ...
Timur Yu, Magarlamov +1 more
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2015
AbstractNemertea is a spiralian phylum comprising approximately 1300 species of mostly marine, nocturnal predators. Prey is captured with an eversible proboscis housed in a dorsally located fluid filled secondary body cavity, called rhynchocoel. Three major clades are recognized: Hoplonemertea, Pilidiophora, and Palaeonemertea.
Patrick Beckers, Jörn von Döhren
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AbstractNemertea is a spiralian phylum comprising approximately 1300 species of mostly marine, nocturnal predators. Prey is captured with an eversible proboscis housed in a dorsally located fluid filled secondary body cavity, called rhynchocoel. Three major clades are recognized: Hoplonemertea, Pilidiophora, and Palaeonemertea.
Patrick Beckers, Jörn von Döhren
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Higher classification of the Monostilifera (Nemertea: Hoplonemertea)
Zootaxa, 2021The nemertean order Monostilifera consists of 594 species in 127 genera and is distributed worldwide. Within the Monostilifera, two suborders have been recognized, Cratenemertea and Eumonostilifera. Within the latter, two, unranked clade names, Oerstediina and Amphiporina, were recently proposed without formal taxonomic definition.
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Molecular Phylogenetics and Evolution, 2007
A continuous 10.1kb fragment of the Cephalothrix rufifrons (Nemertea, Palaeonemertea) mitochondrial genome was sequenced and characterized to further assess organization of protostome mitochondrial genomes and evaluate the phylogenetic potential of gene arrangement and amino acid characters.
J M, Turbeville, D M, Smith
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A continuous 10.1kb fragment of the Cephalothrix rufifrons (Nemertea, Palaeonemertea) mitochondrial genome was sequenced and characterized to further assess organization of protostome mitochondrial genomes and evaluate the phylogenetic potential of gene arrangement and amino acid characters.
J M, Turbeville, D M, Smith
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Rhynchocoel vessel in Cephalotrichidae (Nemertea: Palaeonemertea)
Journal of Natural History, 2010The morphology of the rhynchocoel blood vessel was studied in 26 specimens representing 14 species of the family Cephalotrichidae. In eight specimens the vascular system could not be traced because of their small size, poor fixation, or contraction during fixation. In the other 18 specimens, a short mid-dorsal rhynchocoel vessel was found.
Hiroshi Kajihara
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Nemertea Proboscis Inspired Extendable Mechanism
2019 International Symposium on Micro-NanoMechatronics and Human Science (MHS), 2019In this research, we aim to establish a design theory and implementation method for an inflatable robot mechanism that can branch and divide freely based on the core technology that a robot freely shapes its structure with a shape memory function. As a first step of our investigation, we present an initial prototype model of branched torus mechanism ...
Kenjiro Tadakuma +10 more
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The nervous systems of Hoplonemertea (Nemertea)
Zoomorphology, 2018We investigated the nervous system of 13 species of hoplonemerteans of different lineages using serial histological sectioning, Azan staining, immunohistology and electron microscopy. The central nervous system (cns) of hoplonemerteans consists of a circular brain and laterally located medullary cords.
Patrick Beckers +2 more
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Mitochondrial DNA Part A, 2015
The complete mitochondrial genome (mitogenome) of Micrura bella was sequenced and analyzed. Being the largest mitogenome known to phylum Nemertea, the genome is 16 847 bp in length. It encodes 37 genes typical to metazoan mitogenomes and has the same gene arrangement with the other Heteronemertea mitogenomes sequenced to date.
Chunyang, Shen, Sun, Shi-Chun
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The complete mitochondrial genome (mitogenome) of Micrura bella was sequenced and analyzed. Being the largest mitogenome known to phylum Nemertea, the genome is 16 847 bp in length. It encodes 37 genes typical to metazoan mitogenomes and has the same gene arrangement with the other Heteronemertea mitogenomes sequenced to date.
Chunyang, Shen, Sun, Shi-Chun
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Molecular Biology Reports, 2010
The mitochondrial genome sequences were determined for two species of nemerteans, Cephalothrix sp. (15,800 bp sequenced, near-complete) and Paranemertes cf. peregrina (14,558 bp, complete). As seen in most metazoans, the genomes encode 13 protein, 2 ribosomal RNA and 22 transfer RNA genes.
Hai-Xia, Chen +3 more
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The mitochondrial genome sequences were determined for two species of nemerteans, Cephalothrix sp. (15,800 bp sequenced, near-complete) and Paranemertes cf. peregrina (14,558 bp, complete). As seen in most metazoans, the genomes encode 13 protein, 2 ribosomal RNA and 22 transfer RNA genes.
Hai-Xia, Chen +3 more
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Platyhelminthes, Nematoda, Nemertea
1990Abstract The platyhelminths, or flatworms, are bilaterally symmetrical, pseudocoelomate animals with soft, dorso-ventrally flattened bodies. The body shows marked cephalization, but is unsegmented, although in the Cestoda serial budding, or strobilization, of identical proglottids posterior to the scolex gives rise to an apparently ...
R Gibson, E W Knight-Jones
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