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Indications ofrelationships between poriferan classes using full-length 18S rRNA gene sequences
| Title: | Indications ofrelationships between poriferan classes using full-length 18S rRNA gene sequences. |
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| Name(s): |
Adams, Christi L. McInerney, James O. Kelly-Borges, M. Harbor Branch Oceanographic Institute |
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| Type of Resource: | text | |
| Genre: | Article | |
| Date Issued: | 1999 | |
| Publisher: | Queensland Museum | |
| Place of Publication: | Brisbane | |
| Physical Form: | ||
| Extent: | 12 p. | |
| Language(s): | English | |
| Identifier: | FA00007272 (IID) | |
| Note(s): |
Porifera is traditionally viewed as monophyletic, yet recent molecular data indicate it may be
paraphyletic or even polyphyletic. In this study full-length l8S rRNA sequences were
derived from two hexactinellid sponges (Class Hexactinellida), four demosponges (Class
Demospongiae) and one calcareous sponge (Class Calcarea), in order to test the evolutionary
hypotheses of relationship between them, and ultimately, to test the monophyly of Porifera.
Phylogenetic analyses yielded congruent polyphyletic topologies with Demospongiae and
Hexactinellida, forming a well-supported clade, which excluded the Calcarea. The Calcarea
was hypothesised to be more closely related to other diploblasts, forming a clade with the
comb-jellies (Phylum Ctenophora). The Kishino-Hasegawa test was applied to explore
alternative evolutionary relationships between the sponge classes. Constraining the Calcarea
as sister taxon to either Demospongiae or Hexactinellida was rejected in this test, although a
monophyletic sponge phylum could not be rejected using this dataset. Florida Atlantic University. Harbor Branch Oceanographic Institute contribution 1282 This manuscript is an author version with the final publication available and may be cited as: Adams, C.L., McInerney, J.O., & Kelly, M. (1999). Indications of relationships between poriferan classes using full-length 18S rRNA gene sequences. Memoirs of the Queensland Museum, 44, 33-43. |
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| Subject(s): |
Sponges RNA, Ribosomal, 18S Demospongiae Phylogeny--Molecular aspects Calcarea Hexactinellida |
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| Persistent Link to This Record: | http://purl.flvc.org/fau/fd/FA00007272 | |
| Host Institution: | FAU |
