A phylogenetic study of the shrimp genus Palaemonetes Heller 1869 from North America (Crustacea: Decapoda)

Date

1998-08

Journal Title

Journal ISSN

Volume Title

Publisher

Texas Tech University

Abstract

The broad research objective of this study is to understand the systematic relationships of the species within the genus Palaemonetes from North America. This will provide a framework to increase our knowledge of this important part of the aquatic food chain, as well as provide a mechanism for understanding more about the biogeography and the ecology of North America.

The specific issues to be examined in this study are: (1) the development of hypotheses of systematic relationships among species of Palaemonetes from North America; (2) whether the freshwater species do form a monophyletic group as proposed by Sollaud (1923) and Strenth (1976); (3) whether following the hypothesis by Holthuis (1952), and re-enacted by Webb (1980), P. antrorum should be elevated to a subgenus (Alaocaris) and separated from the other species of North American Palaemonetes; (4) whether P. holthuisi should be elevated to a new genus. 10 Calathaemon, as proposed by Bruce (1993) is supported by the data; (5) whether the hypothesis by Dobkin (1965, 1971) that P. kadiakensis is a recent immigrant into the freshwater environment is upheld; (6) whether the origin of the North American species of Palaemonetes was in salt or freshwater; and (7) what the potential role of biogeography in the evolution of the genus Palaemonetes.

Description

Keywords

Crayfish, Palaemonetes

Citation