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polyphyletic

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pol·y·phy·let·ic (pl-f-ltk)
adj.
1. Descended or derived from more than one ancestral stock or source.
2. Of or being the theory that blood cells are derived from several different stem cells, depending on the particular blood cell type.

poly·phyle·tism (-fl-tzm) n.


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This group, which exhibits diverse morphological characters and is apparently polyphyletic, primarily inhabits either subtropical areas such as Hawaii, and Japan or is mainly confined to deep reefs in about 50-183 m depth.
It is not surprising, then, that molecular phylogenetic analyses to date have revealed that most of the larger cheilanthoid genera are polyphyletic (Gastony and Rollo, 1998; Kirkpatrick, 2007; Prado et al.
Since the jaw apparatuses of Kaljoprion and Rhytiprion are supposed to belong to different apparatus types, the transversal ridges most likely represent a polyphyletic character that has developed independently in two rather distantly related taxa.
 
 
 
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