博士 / 國立臺灣海洋大學 / 海洋生物研究所 / 104 / The infraorder Stenopodidea is a relatively small group of marine decapod crustaceans including the well-known cleaner shrimps, but their higher taxonomy has been rather controversial. This study provides the most comprehensive molecular phylogenetic analyses of Stenopodidea using sequence data from two mitochondrial (16S and 12S rRNA) and two nuclear (H3 and NaK) genes. 33 species (40% of world species) in all twelve nominated genera from the three stenopodidean families are included in the molecular analysis. The inferred phylogeny did not support the familial ranking of Macromaxillocarididae and rejected the reciprocal monophyly of Spongicolidae and Stenopididae. The genera Stenopus, Richardina, Spongiocaris, Odontozona, Spongicola and Spongicolodes are showed to be poly- or paraphyletic, with the monophyly of the latter three genera strongly rejected in the analysis. The present results only strongly support the monophyly of Microprosthema and suggest that Paraspongiola should be synonymized with Spongicola. The three remaining genera, Engystenopus, Juxtastenopus and Globospongicola, may need to be expanded to include species from other genera if their status are maintained. All findings suggest that the morphological characters currently adopted to define genera are mostly invalid and substantial taxonomic revisions are required. Ancestral state reconstruction revealed 9 synapomorphies. Moreover, fossil calibration showed that stenopodideans originated in the deep-sea and associated with sponges in the Mississippian (~323 MYA), and transitioned to shallow water in three times and free-living in two times. Many of the present days genera mainly radiated during the Eocene and Miocene.
| Identifer | oai:union.ndltd.org:TW/104NTOU5270006 |
| Date | January 2016 |
| Creators | Chen, Chien-Lin, 陳健霖 |
| Contributors | 陳天任 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 211 |
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