Results 221 to 230 of about 21,539 (261)

Tetrodotoxins in Larval Development of Ribbon Worm Cephalothrix cf. simula (Palaeonemertea, Nemertea)

Marine Biotechnology, 2023
The toxic ribbon worm, Cephalothrix cf. simula (Palaeonemertea, Nemertea), possesses extremely high concentrations of tetrodotoxin (TTX). Although TTX has been found in the eggs of this species, the fate of the toxin in the ontogeny of the animal has not been explored. Here, using high performance liquid chromatography with tandem mass spectrometry and
Grigorii V, Malykin, Peter V, Velansky, Daria I, Melnikova, Timur Yu, Magarlamov   +3 more
openaire   +2 more sources

Biodiversity Record: Terrestrial ribbon worms (genus Geonemertes) predation on arthropods

2023
Nature in Singapore, 16, 1 ...
Ong, Rene S. L., Yap, Eehean, Chuah, Tuang Heok, Goh, Adeline, Seah, Andrew, Soh, Kam Yung   +5 more
openaire   +1 more source

New records of ribbon worms (Nemertea) from Ceará, Northeast Brazil

Zootaxa, 2016
Of 45 species of nemerteans reported for the Brazilian coast, only two were recorded from Brazil’s Northeast coast. Here we report seven new records for the state of Ceará, in Northeast Brazil: Tubulanus rhabdotus Côrrea, 1954, Carinomella cf. lactea Coe, 1905, Baseodiscus delineatus (Delle-Chiaje 1825), Cerebratulus cf.
Cecili B, Mendes, Helena, Matthews-Cascon, Jon L, Norenburg   +2 more
openaire   +2 more sources

Tetrodotoxin and related substances in a ribbon worm Cephalothrix linearis (Nemertean)

Toxicon, 1990
A ribbon worm Cephalothrix linearis (Nemertean) showed a high toxicity, of up to 22,000 MU/g proboscis and 13,600 MU/g body, in terms of tetrodotoxin. This organism secreted the toxin from the skin when wiped with gauze. The toxin was partially purified from the secretion as well as the wiped body by ultrafiltration and Bio-Gel P-2 column ...
A E, Ali, O, Arakawa, T, Noguchi, K, Miyazawa, Y, Shida, K, Hashimoto   +5 more
openaire   +2 more sources

High Rates of Self-Fertilization in a Marine Ribbon Worm (Nemertea)

The Biological Bulletin, 2015
Organisms capable of self-fertilization ("selfing") typically exhibit two evolutionary syndromes: uniting high inbreeding depression with low levels of selfing, or low inbreeding depression with high levels of selfing. We examined the effect of inbreeding on fecundity and time to first reproduction in an apparently self-compatible, simultaneously ...
Serena A, Caplins, James M, Turbeville
openaire   +2 more sources

Flatworms and Ribbon Worms

1995
Abstract These ‘flatworms’ are bilaterally symmetrical, with marked cephalization, mostly with a mouth, gut, and protonephridia, and typically with hermaphrodite reproductive systems, but without a special body cavity, anus, or circulatory system. Five classes may be recognized.
R Gibson, E W Knight-Jones
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

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

The toxicity of ribbon worms: Alpha-nemertides or tetrodotoxin, or both?

Planta Medica, 2016
The marine ribbon worms (nemerteans) are predators which capture their prey by everting a proboscis carrying a mixture of toxins which brings on rapid paralysis [1].
HS Andersson, E Jacobsson, C Eriksson, M Hedström, H Seth, P Sundberg, KJ Rosengren, M Strand, U Göransson   +8 more
openaire   +1 more source

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, Irina A, Beleneva, Alexey V, Chernyshev, Andrey D, Kuhlevsky   +3 more
openaire   +2 more sources