We considered these morphological variables to represent gill size and gill spatial extension, and all of the variables together to indicate the development of the external gills.
T. brandonensis may represent a sister species to all other thylacocephalans, in which case the absence of gills might be plesiomorphic; alternatively gills may have been lost through decay.
Likewise, the simple arrangement of gill slits and the particular morphogenesis and structure of stolons in pyrosomes and salps may represent synapomorphic characters of the two groups [ 51].
And they may represent a relative bargain.
They may represent newly discovered genotypes.
Fish-associated members of the genus Elizabethkingia may represent pathogenic or spoilage organisms or belong to the normal bacterial flora that colonize the mucus at the surface of the skin and gills and the intestine of healthy fish [ 1].
Something that may represent 4 elements.
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His eyelids bat horizontally, while a proud ruff of what may be gills palpates around his neck.
