Results 231 to 240 of about 21,617 (253)

Tetrodotoxin-producing Bacillus sp. from the ribbon worm (Nemertea) Cephalothrix simula (Iwata, 1952)

Toxicon, 2014
Specimens of the toxic ribbon worm Cephalothrix simula from the Sea of Japan were screened for tetrodotoxin-producing bacteria. A single TTX-producing bacterial strain (No 1839) was isolated from tissues of C. simula and studied by immunohistochemical methods (including immunoelectron and immunofluorescent microscopies) with anti-TTX antibodies ...
Timur Yu Magarlamov, Alexei V Chernyshev
exaly   +3 more sources

A new nemertean species: what are the useful characters for ribbon worm descriptions?

Journal of the Marine Biological Association of the United Kingdom, 2013
In recent years the Norwegian Taxonomy Initiative started thorough investigations of poorly known organism groups. In this context, several marine inventories have rendered a number of marine invertebrate species new to science. Within the phylum Nemertea (ribbon worms) a characteristic hoplonemertean was encountered on two different occasions.
Malin Strand, Alfonso Herrera-Bachiller, Arne Nygren, Tobias Kånneby   +3 more
openaire   +1 more source

Microscopic anatomy of the integument in the ribbon worm Micrura bella (Stimpson, 1857) (Pilidiophora, Nemertea)

Journal of Morphology, 2022
Abstract The integument of ribbon worms in the order Heteronemertea is distinct from the integuments in the other taxa of nemerteans due to the presence of a special subepidermal glandular layer, the cutis.
Alexandra O. Pereverzeva, Alexei V. Chernyshev, Timur Yu Magarlamov   +2 more
openaire   +2 more sources

Distribution of tetrodotoxin in the ribbon worm Lineus alborostratus (Takakura, 1898) (nemertea): Immunoelectron and immunofluorescence studies

Toxicon, 2016
Transmission electron and confocal laser scanning (CLSM) microscopies with monoclonal anti-tetrodotoxin antibodies were used to locate tetrodotoxin (TTX) in tissues and gland cells of the ribbon worm Lineus alborostratus. CLSM studies have shown that the toxin is primarily localized in the cutis (special subepidermal layer) of the body wall and in the ...
Timur Yu Magarlamov, Alexei V Chernyshev
exaly   +3 more sources

Upside-down behaviour of certain ribbon worms (phylum Nemertea)

Journal of Tropical Ecology
Abstract Ribbon worms in the genus Balionemertes from Vietnam, the Philippines, Australia, and Guam—as well as Cephalothrix suni from Vietnam—were examined. Our observations indicate that the worms crawl mostly with their ventral surface upwards (the ventral surface being where the mouth opens), a behaviour that has not been documented in previous ...
Hiroshi Kajihara, Audrey Falconer, Alexei Viktorovich Chernyshev   +2 more
openaire   +1 more source

Species Diversity of Japanese Ribbon Worms (Nemertea)

2016
This chapter provides a brief taxonomic conspectus of the Japanese nemerteans with photographs of 100 species. A total of 126 species are recognized in Japanese waters, but there are still at least 77 unreported/undescribed forms awaiting formal description.
openaire   +1 more source

A worm-like trace of cathode spots on Cu–Zr–Ti amorphous ribbons

Journal of Physics D: Applied Physics, 2003
On Cu-Zr-Ti amorphous ribbons, a lot of worm-like traces or quasi-continuous traces of cathode spots have been clearly observed using a scanning electron microscope (SEM). This kind of trace is eroded by the motion of a single spot step by step, and could not be observed on cathodes made of crystalline materials. Spot motion direction can be identified
Chengyu Zhang, Zhimao Yang, Yaping Wang, Bingjun Ding   +3 more
openaire   +1 more source

The biology and systematics of a new species of ribbon worm, genus Tubulanus (phylum Nemertea)

2023
Most nemerteans are studied from poorly preserved museum specimens. Much of the existing data on this group of worms is incomplete at best. Only through thorough species descriptions from live animals and properly preserved specimens will we be able to reconstruct the life history relationships of this cryptic group of worms. Since nemerteans generally
openaire   +1 more source

Disentangling ribbon worm relationships: multi‐locus analysis supports traditional classification of the phylum Nemertea

Cladistics, 2011
AbstractThe phylogenetic relationships of selected members of the phylum Nemertea are explored by means of six markers amplified from the genomic DNA of freshly collected specimens (the nuclear 18S rRNA and 28S rRNA genes, histones H3 and H4, and the mitochondrial genes 16S rRNA and cytochrome c oxidase subunit I).
Andrade, Sónia C. S., Strand, Malin, Schwartz, Megan, Chen, Haixia, Kajihara, Hiroshi, von Döhren, Jörn, Sun, Shichun, Junoy, Juan, Thiel, Martin, Norenburg, Jon L., Turbeville, James M., Giribet, Gonzalo, Sundberg, Per   +12 more
openaire   +3 more sources

Tetrodotoxin in diet items of highly toxic ribbon worm Cephalothrix cf. simula (Palaeonemertea, Nemertea)

Toxicon
We, for the first time, have carried out a search for tetrodotoxin and its analogues (TTXs) in extracts of various animals being potential diet items for highly toxic nemerteans Cephalothrix cf. simula using high-performance liquid chromatography with tandem mass spectrometry (HPLC-MS/MS). We have screened TTXs in a total of 57 specimens from 2 classes.
P V Velansky, Timur Yu Magarlamov, V G Kuznetsov   +2 more
exaly   +3 more sources