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Let's be pals again: major systematic changes in Palaemonidae (Crustacea: Decapoda)
Sammy De Grave1, Charles H J M Fransen2, Timothy J Page3
1Oxford University Museum of Natural History, Oxford University , Oxford , United Kingdom.
Peerj
|September 5, 2015
Summary
Shrimp family classifications were re-evaluated using molecular and morphological data. Gnathophyllidae, Hymenoceridae, and Pontoniinae are not valid taxa and are synonymized with Palaemonidae.
Area of Science:
- Marine Biology
- Taxonomy
- Molecular Phylogenetics
Background:
- The systematic classification of shrimp families Gnathophyllidae and Hymenoceridae has been contentious.
- Previous phylogenetic studies questioned their validity as distinct family-level units.
Purpose of the Study:
- To review molecular and morphological evidence concerning Gnathophyllidae and Hymenoceridae.
- To investigate the validity of subfamilies within Palaemonidae.
- To formally synonymize invalid taxa with Palaemonidae.
Main Methods:
- Review of existing molecular evidence.
- Analysis of morphological characters used for family and subfamily distinctions.
- Phylogenetic analysis of Palaemonidae.
Main Results:
- Neither Gnathophyllidae nor Hymenoceridae are valid family-level taxa.
- The key morphological character distinguishing Palaemoninae and Pontoniinae is invalid.
- Phylogenetic results support the invalidity of these distinctions.
Conclusions:
- Gnathophyllidae, Hymenoceridae, and Pontoniinae are synonymized with Palaemonidae.
- The recognition of subfamilies within Palaemonidae is not supported.
- This taxonomic revision clarifies shrimp family relationships.
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