Results 181 to 190 of about 1,406 (207)

Colonial behaviour and electrical activity in the Hexacorallia

Proceedings of the Royal Society of London Series B, Containing Papers of A Biological Character, 1975
Abstract The behaviour of the polyps of eight coral species in the subclass Hexacorallia is described with reference to electrical activity recorded with extracellular suction electrodes. Following repetitive mechanical or electrical stimulation, waves of polyp retraction spread over the colony from the point of stimulation.
exaly   +2 more sources

Opinion 2500 (Case 3790) – Proposed review of Opinion 2404 and reconsideration of Case 3633: Dysactis pallida Agassiz in Verrill, 1864 (currently Exaiptasia pallida; Cnidaria, Anthozoa, Hexacorallia, Actiniaria): proposed precedence over Exaiptasia diaphana (Rapp, 1829) not approved

Bulletin of Zoological Nomenclature, 2023
. The International Commission on Zoological Nomenclature has declined to use its plenary power to reverse Opinion 2404 regarding Case 3633 which would have resulted in giving priority to the species-group name Dysactis pallida Agassiz in Verrill, 1864 ...

semanticscholar   +1 more source

Electrophysiology of two parallel conducting systems in the colonial Hexacorallia

Proceedings of the Royal Society of London. Series B. Biological Sciences, 1976
Abstract Extracellular polythene suction electrodes have been used to record electrical activity in four species of Madreporaria - Dendrogyra cylindrus, Meandrina meandrites, Mussa angulosa and Eusmilia fastigiata. A colonial conduction system, believed to be the nerve net, was found in all species.
G A, Shelton, I D, McFarlane
openaire   +2 more sources

Morphology, distribution, and evolution of apical structure of nematocysts in hexacorallia

Journal of Morphology, 2011
AbstractCnidae are complex intracellular capsules made by all cnidarians. The most diverse of these capsules are nematocysts, which are made by all members of the phylum; spirocysts and ptychocysts are made only by members of some lineages, and they show less functional and structural diversity.
Abigail J, Reft, Marymegan, Daly
openaire   +2 more sources

The reproductive biology of Parazoanthus parasiticus (Hexacorallia: Zoanthidea) in Bermuda

Hydrobiologia, 2004
The zooxanthellate macrocnemic zoanthid Parazoanthus parasiticus lives at densities of 3–10 cm−2 in the chimney sponge Callyspongia vaginalis in Bermuda. It is gonochoric and oviparous. Small oocytes appear in the mesenteries in February–March, grow slowly at first, then increase volume rapidly as seawater temperature passes 27 °C in July.
J. S. Ryland, DÖrte Westphalen
openaire   +1 more source

Case 3805 – Calliactis Verrill, 1869 (Cnidaria, Anthozoa, Hexacorallia, Actiniaria): proposed precedence over Adamsia Forbes, 1840

Bulletin of Zoological Nomenclature
. The purpose of this application, under Article 23.9.3 of the Code, is to conserve the name Calliactis Verrill, 1869 for a genus of sea anemones (Cnidaria, Actiniaria) that has been widely studied in the context of crustacean-cnidarian symbiosis.
Estefanía Rodríguez, L. Gusmão
semanticscholar   +1 more source

The Biology and Ecology of Black Corals (Cnidaria: Anthozoa: Hexacorallia: Antipatharia)

2012
Antipatharians, commonly known as black corals, are treasured by many cultures for medicinal purposes and to produce jewellery. Despite their economic and cultural importance, very little is known about the basic biology and ecology of black corals because most species inhabit deeper-water environments (>50m) which are logistically challenging to study.
Daniel, Wagner, Daniel G, Luck, Robert J, Toonen   +2 more
openaire   +2 more sources

Comparative study of zoanthid sterols the genus palythoa (hexacorallia, zoanthidea)

Comparative Biochemistry and Physiology Part B: Comparative Biochemistry, 1982
Abstract 1. 1. The sterol composition of three Palythoa species has been analysed and compared with literature data. 2. 2. The mixture of sterols known as “palysterol” has been observed in all our samples suggesting that palysterol might be considered as a fingerprint of Palythoa species. 3. 3.
Alphonse Kelecom, Antonio M. Solé-Cava
openaire   +1 more source

Morphological and molecular description of a new genus and species of black coral (Cnidaria: Anthozoa: Hexacorallia: Antipatharia: Antipathidae: Blastopathes) from Papua New Guinea.

Zootaxa, 2020
Blastopathes medusa gen. nov., sp. nov., is described from Kimbe Bay, Papua New Guinea, based on morphological and molecular data. Blastopathes, assigned to the Antipathidae, is a large, mythology-inspiring black coral characterized by clusters of ...
J. Horowitz, M. Brugler, T. Bridge, P. Cowman   +3 more
semanticscholar   +1 more source

Symbiodinium diversity associated with zoanthids (Cnidaria: Hexacorallia) in Northeastern Brazil

Symbiosis, 2014
Some marine animals have a dynamic mutualistic association involving heterotrophic coral animals (hosts) and autotrophic dinoflagellate endosymbionts in the genus Symbiodinium, known as zooxanthellae, which are directly involved in their physiology. Currently, there is limited knowledge of the Symbiodinium diversity associated with zoanthids from the ...
Emanuelle Fontenele Rabelo, Lidianne Leal Rocha, Geórgia Barguil Colares, Tatiana Araújo Bomfim, Vanessa Lúcia Rodrigues Nogueira, Marco Katzenberger, Helena Matthews-Cascon, Vânia Maria Maciel Melo   +7 more
openaire   +1 more source