Results 231 to 240 of about 11,562 (259)
Some of the next articles are maybe not open access.
Naturwissenschaften, 1997
is famous for its ability to regenerate missing structures. Even aggregates of single cells transform eventually into normally shaped animals. This indicates a communication within the tissue and within the aggregates which determines the spatial pattern of gene expression. Such pattern-forming systems are thought to play a decisive role in the control
openaire +2 more sources
is famous for its ability to regenerate missing structures. Even aggregates of single cells transform eventually into normally shaped animals. This indicates a communication within the tissue and within the aggregates which determines the spatial pattern of gene expression. Such pattern-forming systems are thought to play a decisive role in the control
openaire +2 more sources
Peptides in the Hydrozoa: are they transmitters?
Hydrobiologia, 1991A family of peptides with the carboxy-terminus Arg-Phe-amide has been localized to specific subpopulations of neurons in every cnidarian species examined. These neurons are typically sensory in character or are associated with smooth muscle. Although a transmitter role for these peptides has been suggested for anthozoans at neuromuscular synapses, no ...
openaire +2 more sources
SIF, A novel morphogenetic inducer in hydrozoa
Developmental Biology, 1991By analogy to processes in angiogenesis (blood vessel formation), the development of the stolonal network in colonial hydrozoa involves stimulation of branching and mutual chemotropic attraction of the growing branches by means of soluble morphogenetic factors.
Werner A. Müller, Rolf G. Lange
openaire +3 more sources
Hydroidomedusae (Cnidaria: Hydrozoa) symbiotic radiation
Journal of the Marine Biological Association of the United Kingdom, 2008Hydroids can establish symbiotic relationships with most marine phyla. Almost entire genera or even families are associated with specific groups (e.g. Hydractiniidae and Cytaeididae with gastropods and hermit crabs, Zancleidae with bryozoans,Dipurenawith sponges,Ralphariawith octocorals,Eugymnantheawith bivalves,ProboscidactylaandTeissierawith ...
PUCE S +3 more
openaire +3 more sources
2006
The superclass Hydrozoa of the phylum Cnidaria comprises 3,702 species currently regarded as valid, ascribed to three heterogeneous classes. The 134 species of the class Automedusa have simple life cycles with medusae and no polyp stage, and are divided into three subclasses: Actinulidae, Narcomedusae, Trachymedusae.
BOUILLON J +4 more
openaire +1 more source
The superclass Hydrozoa of the phylum Cnidaria comprises 3,702 species currently regarded as valid, ascribed to three heterogeneous classes. The 134 species of the class Automedusa have simple life cycles with medusae and no polyp stage, and are divided into three subclasses: Actinulidae, Narcomedusae, Trachymedusae.
BOUILLON J +4 more
openaire +1 more source
3 Hydrozoa Metamorphosis and Pattern Formation
1997Publisher Summary This chapter discusses metamorphosis from the larval to the polyp state and pattern formation in larvae, polyps, and colonies. Metamorphosis and pattern formation in larvae and colonies have been studied by experiments with Hydractinia , and pattern formation in polyps, by experiments with Hydra .
openaire +3 more sources
Zootaxa, 2005
The metagenetic Lafoeina is one of the many leptothecate genera with uncertain affinities, the life cycles of its constituent species being poorly known. The genus has traditionally been recognized as belonging to the polyphyletic superfamily Campanulinoidea, family Campanulinidae, taxa that artificially group together a variety of probably unrelated ...
André Scharlach Cabral +1 more
openaire +3 more sources
The metagenetic Lafoeina is one of the many leptothecate genera with uncertain affinities, the life cycles of its constituent species being poorly known. The genus has traditionally been recognized as belonging to the polyphyletic superfamily Campanulinoidea, family Campanulinidae, taxa that artificially group together a variety of probably unrelated ...
André Scharlach Cabral +1 more
openaire +3 more sources
Hydrozoa of the Eurasian Arctic Seas
1989Hydrozoans comprise one of the four classes in the phylum Cnidaria. Most members of the class have bottom sedentary (seldom pelagic) polypoid and pelagical medusoid stages of the life cycle. The polypoid generation may be an individual organism or a colony with the chitinous (rarely calcareous) skeleton. The polypoid produces the medusoid stage.
openaire +2 more sources
A history of the sub-order Cystonectae (Hydrozoa: Siphonophorae)
Zootaxa, 2019The siphonophore sub-order Cystonectae presently comprises just five species in three genera and two families, and includes Physalia physalis, the Portuguese Man O’War. Despite the smallness of the group its history has been very chequered, particularly for P. physalis, which has been described under more than fifty different names.
openaire +5 more sources