from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Any of various marine coelenterates of the class Scyphozoa, which includes the large jellyfishes, characterized by the absence of a velum and by a polyp stage that is very small or lacking entirely.
- adj. Of or belonging to the class Scyphozoa.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Any true jellyfish of the class Scyphozoa
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. any of various usually free-swimming marine coelenterates having a gelatinous medusoid stage as the dominant phase of its life cycle
Kuhn K, Streit B, Schierwater B (1999) Isolation of Hox genes from the scyphozoan Cassiopeia xamachana: implications for the early evolution of Hox genes.
Hydra magnipapillata full genome and have not been identified until now in other hydrozoan or scyphozoan species, being only known from the anthozoan
Although scyphozoan sequences are lacking in the HOX1, HOX2, HOX9-14A and CDX groups (figure 1), these absences could be due to non exhaustive sampling from PCR surveys, a full genome sequence being currently lacking for this cnidarian lineage
In some cases, gene relationships among cnidarian groups are congruent with the species phylogeny: hydrozoan sequences are sister-group to scyphozoan sequences, with anthozoan sequences branching basally to this ensemble.