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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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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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Status of the Nemertea as predators in marine ecosystems
Hydrobiologia, 2001The ecology of nemertean predators in marine ecosystems is reviewed. Nemerteans occur in most marine environments although usually in low abundances. Some species, particularly in intertidal habitats, may reach locally high densities. During specific time periods appropriate for hunting, nemerteans roam about in search of prey.
Martin Thiel, Inken Kruse
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The Relation of the Nemertea to the Vertebrata
Journal of Cell Science, 1887ABSTRACT In venturing at the close of my Report on the Nemertea, collected by ILM.S. “Challenger,” to leave the region of demonstrated facts and actual observations, and to enter upon that of speculation and suggestion, I gladly availed myself of the permission for so doing granted to me by the editor, Mr. John Murray.
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The nervous systems of Pilidiophora (Nemertea)
Zoomorphology, 2014Today molecular data recover three higher taxa in nemerteans, Palaeonemertea, Pilidiophora and Hoplonemertea. Hubrechtella dubia, a former palaeonemertean taxon was excluded from palaeonemerteans and is now supported as the sister group to heteronemerteans. This taxon is called Pilidiophora, because H.
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Zoomorphology, 2013
During spiralian development, the first pair of nephridia forms anterior to the mouth. Each organ consists of a few cells, which is characteristic for spiralian larvae. In nemerteans, one of the unambiguously spiralian taxa, so far protonephridia, has been reported only in advanced pilidium larvae, where they likely persist as juvenile and adult ...
T. Bartolomaeus +2 more
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During spiralian development, the first pair of nephridia forms anterior to the mouth. Each organ consists of a few cells, which is characteristic for spiralian larvae. In nemerteans, one of the unambiguously spiralian taxa, so far protonephridia, has been reported only in advanced pilidium larvae, where they likely persist as juvenile and adult ...
T. Bartolomaeus +2 more
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Status of the Nemertea as prey in marine ecosystems
Hydrobiologia, 2001Nemerteans are predators of a wide variety of animals, but little is known of their role as prey for other animals. The presence of toxins in the tissues and secretions of these worms has led to the assumption usually suggested that they are ingested only rarely.
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