Abstract：
:Ascidians are urochordates, marine invertebrates with non-feeding motile chordate tadpole larvae, except in the family Molgulidae. Urodele, or tailed, Molgulids have typical ascidian chordate tadpole larvae possessing tails with muscle cells, a notochord, and a dorsal hollow nerve cord. In contrast, anural (or tail-less) Molgulids lack a tail and defining chordate features. Molecular phylogenies generated with 18S and 28S ribosomal sequences indicate that Molgulid species fall into at least four distinct clades, three of which have multiple anural members. This refined and expanded phylogeny allows careful examination of the factors that may have influenced the evolution of tail-less ascidians.
journal_name
Semin Cell Dev Bioljournal_title
Seminars in cell & developmental biologyauthors
Huber JL,da Silva KB,Bates WR,Swalla BJdoi
10.1006/scdb.2000.0195subject
Has Abstractpub_date
2000-12-01 00:00:00pages
419-26issue
6eissn
1084-9521issn
1096-3634pii
S1084-9521(00)90195-2journal_volume
11pub_type
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