Morphological variation and systematics in the Scyphozoa: Mastigias (Rhizostomeae, Mastigiidae) – a golden unstandard?

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Variation in the ribosomal internal transcribed spacers and 5.8S rDNA among five species of Acropora (Cnidaria; Scleractinia): patterns of variation consistent with reticulate evolution.

M. Odorico, Richard Miller (1997)

The ITS sequences of Acropora spp. are the shortest so far identified in any metazoan and are among the shortest seen in eukaryotes; ITS1 was 70-80 bases, and ITS2 was 100-112 bases. The ITS sequences were also highly variable, but base composition and secondary structure prediction indicate that divergent sequence variants are unlikely to be pseudogenes. The pattern of variation was unusual in several other respects: (1) two distinct ITS2 types were detected in both A. hyacinthus and A. cytherea, species known to hybridize in vitro with high success rates, and a putative intermediate ITS2 form was also detected in A. cytherea; (2) A. valida was found to contain highly (29%) diverged ITS1 variants; and (3) A. longicyathus contained two distinct 5.8S rDNA types. These data are consistent with a reticulate evolutionary history for the genus Acropora.

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Journal

Title: Hydrobiologia

Abbreviated Title: Hydrobiologia

Publisher: Springer Nature

ISSN (Print): 0018-8158

ISSN (Electronic): 1573-5117

Publication date Created: March 2005

Publication date (Print): March 2005

Volume: 537

Issue: 1-3

Pages: 185-206

Article

DOI: 10.1007/s10750-004-2840-8

SO-VID: 34719a71-313b-4a4e-9688-882268ee88a8

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