Results 11 to 20 of about 187 (123)
Two swimming modes in Trachymedusae; bell kinematics and the role of giant axons. [PDF]
J Exp Biol, 2021 ABSTRACT Although members of the Rhopalonematidae family (Cnidaria, Hydrozoa, Trachymedusae) are known to exhibit unusually powerful jet swimming in addition to their more normal slow swimming behaviour, for the most part, reports are rare and anecdotal.
Meech ME +3 more
europepmc +7 more sources
Trachymedusae: Rhopalonematidae
Zootaxa, 1981 A new species of deep-sea jellyfish, Crossota millsae (Cnidaria: Hydrozoa: Trachymedusae: Rhopalonematidae), is described from the North Pacific Ocean off California and Hawaii. Discrete depth sampling showed this species lives at depths below 1000 meters in both geographic locations. The species is more abundant off California than off Hawaii.
Thuesen, Erik V. +1 more
core +4 more sources
Diet of the gelatinous zooplankton in Hardangerfjord (Norway) and potential predatory impact by Aglantha digitale (Trachymedusae) [PDF]
Marine Ecology Progress Series, 1996 Peer ...
Pagès, Francesc +2 more
core +8 more sources
, 2016 Order Trachymedusae Haeckel, 1866 Diagnosis Hydromedusae with umbrella margin entire, not deeply-lobed; with conspicuous marginal nematocyst ring; manubrium with or without gastric peduncle; with circular and radial canals, and gonads usually conFned to the latter; centripetal canals either present or absent; tentacles marginal, either solid, or solid ...
Horia R. Galea +5 more
openaire +3 more sources
Zootaxa, 2010 Large numbers of a distinctive trachymedusa were observed at 1967 m depth just above the bottom in Suruga Bay, Japan, during a dive by the crewed submersible Shinkai 2000 in April 2002. Two individuals were collected and proved to be an undescribed species, herein described as Voragonema tatsunoko sp. nov. This species is characterised by the number (9)
Lindsay, Dhugal, Pagès, Francesc
openaire +4 more sources
The Ultrastructure of the Radial Neuromuscular System of the Jellyfish Liriope tetraphylla (Hydrozoa, Trachymedusae): Implications in Crumpling Behavior [PDF]
The Biological Bulletin, 1991 The ultrastructure of the radial neuromuscular system of the trachymedusa Liriope tetraphylla was examined to determine the morphological substrate underlying crumpling behavior--the folding of the margin into the subumbrellar cavity by radial muscle contraction. These contractions are produced by the four smooth muscle bands that run the length of the
Scemes, Eliana, Mcnamara, J C
openaire +3 more sources
Journal of Experimental Marine Biology and Ecology, 1996 Abstract The osmoregulatory capability and swimming behavior of Liriope tetraphylla (Chamisso and Eysenhardt) were analyzed under hyposmotic conditions. These hydromedusae are shown to be osmoconforming animals that are not able to maintain constant osmotic and ionic concentrations of their body fluids when exposed to anisosmotic media.
Marta M. de Souza +2 more
openaire +2 more sources
Environmental DNA surveys detect distinct metazoan communities across abyssal plains and seamounts in the western Clarion Clipperton Zone. [PDF]
Mol Ecol, 2020 Abstract The deep seafloor serves as a reservoir of biodiversity in the global ocean, with >80% of invertebrates at abyssal depths still undescribed. These diverse and remote deep‐sea communities are critically under‐sampled and increasingly threatened by anthropogenic impacts, including future polymetallic nodule mining.
Laroche O +3 more
europepmc +2 more sources
Hidden gems: Scattered knowledge hampered freshwater jellyfish research over the past one-and-a-half centuries. [PDF]
Ecol EvolApproximately 150 years of research on freshwater jellyfish globally have resulted in a considerable amount of information. However, this is not comprehensively available to most researchers worldwide. Scattered information allows only for a fragmented view of the research field, which mediated by climate change received increasing importance.
Lüskow F +10 more
europepmc +2 more sources