Cookies Policy

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies.

I accept this policy

Find out more here

Molecular Phylogeny of Grapsoid and Ocypodoid Crabs with Special Reference to the Genera Metaplax and Macrophthalmus

No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
The full text of this article is not currently available.

Brill’s MyBook program is exclusively available on BrillOnline Books and Journals. Students and scholars affiliated with an institution that has purchased a Brill E-Book on the BrillOnline platform automatically have access to the MyBook option for the title(s) acquired by the Library. Brill MyBook is a print-on-demand paperback copy which is sold at a favorably uniform low price.

This Article is currently unavailable for purchase.
Add to Favorites
You must be logged in to use this functionality

Cover image Placeholder

Abstract Some species of the genus Metaplax belonging to the family Grapsidae have occasionally been reported to perform waving display that is a characteristic behavior in the family Ocypodidae but uncommon in grapsids. The morphology and life styles of species of Metaplax are also quite similar to those of the ocypodid genus Macrophthalmus. To examine whether ecological and morphological similarities between Metaplax and Macrophthalmus are based on convergent evolution or their common evolutionary history, 841-bp nucleotide sequences from the 16S mitochondrial ribosomal RNA gene of 19 grapsids, 10 ocypodids, and 3 camptandriids, including four species of Metaplax and four species of Macrophthalmus, were analyzed. The resultant phylogenetic tree revealed that both families Grapsidae and Ocypodidae are polyphyletic. Macrophthalmus was distinct from any other ocypodid genera studied, forming a sister group relationship with grapsid species of the subfamily Varuninae, and Metaplax, Cyclograpsus, and Helice of the subfamily Sesarminae. Metaplax, Cyclograpsus, and Helice were found to be more closely related to Varuninae than to other Sesarminae species, indicating that the subfamily Sesarminae is polyphyletic. These relationships were in agreement with the distribution pattern of a tRNAVal gene rearrangement on the inferred tree. This molecular phylogenetic analysis suggests that the behavioral and morphological similarities observed between Metaplax and Macrophthalmus species are probably due to convergent evolution, despite a close phylogenetic relationship. The waving display in intertidal crabs of the families Grapsidae and Ocypodidae may have evolved several times in their lineages, associated with exposed semi-terrestrial habitat of the intertidal environment.

Affiliations: 1: (JK) Graduate School of Human Culture, Nara Women's University, Kitauoya-nishimachi, Nara 630-8506, Japan;(KW) Department of Biological Science, Faculty of Science, Nara Women's University, Kitauoya-nishimachi, Nara 630-8506, Japan (corresponding author (KW); (MN) Department of Marine Bioscience, Ocean Research Institute, University of Tokyo, Nakano, Tokyo 164-8639, Japan


Full text loading...


Data & Media loading...

Article metrics loading...



Can't access your account?
  • Key

  • Full access
  • Open Access
  • Partial/No accessInformation