Abstract:
:Barnacles (Cirripedia) are a subclass of Crustacea. Their peculiar segmentation pattern (few segments, absence of abdominal segments, and, in the parasitic rhizocephalan, loss of segmentation at the adult stage) prompted us to study the engrailed gene, which encodes a homeodomain transcription factor and is expressed in arthropods in the posterior half of each segment. We searched for engrailed genes by PCR in a representative cross section of the Cirripedia. Eight unambiguous engrailed genes were cloned from five species, three genes belonging to the same species (Elminius modestus). This implies two duplication events. Molecular phylogenies were constructed and a cladistic approach was applied to the most informative sites. The results indicate that the older duplication (en.a/en.b) is probably very ancient and concerns the whole cirripedean subclass, whereas the other (en.a1/en.a2) is specific to the Elminius lineage.
journal_name
J Mol Evoljournal_title
Journal of molecular evolutionauthors
Gibert JM,Mouchel-Vielh E,Deutsch JSdoi
10.1007/pl00006181subject
Has Abstractpub_date
1997-06-01 00:00:00pages
585-94issue
6eissn
0022-2844issn
1432-1432journal_volume
44pub_type
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