You are here

Indications ofrelationships between poriferan classes using full-length 18S rRNA gene sequences

Download pdf | Full Screen View

Date Issued:
1999
Title: Indications ofrelationships between poriferan classes using full-length 18S rRNA gene sequences.
96 views
8 downloads
Name(s): Adams, Christi L.
McInerney, James O.
Kelly-Borges, M.
Harbor Branch Oceanographic Institute
Type of Resource: text
Genre: Article
Date Issued: 1999
Publisher: Queensland Museum
Place of Publication: Brisbane
Physical Form: pdf
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.
Subject(s): Sponges
RNA, Ribosomal, 18S
Demospongiae
Phylogeny--Molecular aspects
Calcarea
Hexactinellida
Persistent Link to This Record: http://purl.flvc.org/fau/fd/FA00007272
Host Institution: FAU