NDLI: Species boundaries within the Acropora humilis species group (Cnidaria; Scleractinia): a morphological and molecular interpretation of evolution

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Species boundaries within the Acropora humilis species group (Cnidaria; Scleractinia): a morphological and molecular interpretation of evolution

Content Provider	Springer Nature Link
Author	Wolstenholme, J. K. Wallace, C. C. Chen, C. A.
Copyright Year	2003
Abstract	Species boundaries remain unresolved in many scleractinian corals. In this study, we examine evolutionary boundaries of species in the Acropora humilis species group. Five morphologically discrete units are recognized using principal components and hierarchical cluster analyses of quantitative and qualitative characters, respectively. Maximum parsimony and likelihood analyses of partial 28S rDNA sequences suggest that these morphological units diverged to form two evolutionarily distinct lineages, with A. humilis and A. gemmifera in one lineage and A. digitifera and two morphological types of A. monticulosa in the other. Low levels of sequence divergence but distinct morphologies of A. humilis and A. gemmifera within the former lineage suggest recent divergence or ongoing hybridization between these species. Substantially higher levels of divergence within and between A. digitifera and A. monticulosa suggest a more ancient divergence between these species, with sequence types being shared through occasional introgression without disrupting morphological boundaries. These results suggest that morphology has evolved more rapidly than the 28S rDNA marker, and demonstrate the utility of using morphological and molecular characters as complementary tools for interpreting species boundaries in corals.
Starting Page	155
Ending Page	166
Page Count	12
File Format	PDF
ISSN	07224028
Journal	Coral Reefs
Volume Number	22
Issue Number	2
e-ISSN	14320975
Language	English
Publisher	Springer-Verlag
Publisher Date	2003-05-20
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Acropora Morphology 28S rDNA Species boundaries
Content Type	Text
Resource Type	Article
Subject	Aquatic Science

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