cnidarian


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cnidarian

(nī-dâr′ē-ən)
n.
Any of various invertebrate animals of the phylum Cnidaria, characterized by a radially symmetrical body with a saclike internal cavity and stinging nematocysts, and including the jellyfishes, hydras, sea anemones, and corals.

cni·dar′i·an adj.
References in periodicals archive ?
Scientists have known for decades that cnidarians fire nematocysts in response to a combination of chemical and tactile stimuli.
Although genetic identification of the cnidarian hosts was beyond the scope of our study, our choice of study species and the collection regimen we used increased the likelihood that the colonies were genetically distinct.
PSI Mehler reaction is the main alternative photosynthetic electron pathway in Symbiodinium sp., symbiotic dinoflagellates of cnidarians. New Phytol.
Previous studies have documented regeneration of the nervous system in cnidarian medusae, but only in the lesser complex scypho- and hydromedusae (Hargitt, 1904; Galliot and Schmid, 2002; Bode, 2003).
Induction of gametogenesis in the cnidarian endosymbiosis model Aiptasia sp.
Numerous other cnidarian species with a bentho-pelagic life cycle are globally distributed, a phenomenon that is frequently attributed to repeated species introductions, often through commercial shipping activities (Bayha and Graham, 2013).
In the different cnidarian classes, collagen acts as an extracellular matrix (ECM), providing scaffolding for cellular organization (e.g., Tidball, 1982), and also playing a role in the skeletogenesis (e.g., Ledger and Franc, 1978; Kingsley et al., 1990) and functioning of nematocysts (e.g., Brand et al., 1993).
and concluded that in this simple cnidarian, the immune reactions are limited to focal responses in the ectoderm or the endoderm (also known as gastroderm).
Unexpected diversity of cnidarian integrins: expression during coral gastrulation.
This is frequently cited as a primitive form of nervous system organization, and the phylogenetic position and body plan of cnidarians certainly invite this kind of speculation.