Phylogenetic systematics of the Anomala (Crustacea, Meiura) - Carcinization as a preadaptation or a result of the K/T- event ?


Within the decapod crustaceans, a crab-like habitus has evolved several times independently. Once, on the way leading to the extant brachyuran crabs, and more than once in the sister taxon, the Anomala. The Paguroidea and Galatheoidea (Anomala) are very old taxa and appear in the early Jurassic. A crab like habitus occurs in both taxa. There was a big radition of brachyuran taxa after the K/T-boundary, and the Hippoidea originated within the Anomala. Accordingly, there is a widespread occurrence of a crab like habitus in recent and fossil decapod crustaceans. In my study I analyse the phylogenetic relationships within Anomala and between both Anomala and Brachyura. A major focus of the research lies in the analysis of the ossicles of the foregut. The resolution of the internal and external relationships of the Anomala will give information about the origin of the crab-like habitus and its relationship to the events around the K/T-boundary. Either its widespread occurrence is a preadaptation or a result of this event.


Principal investigators
Scholtz, Gerhard Prof. Dr. rer. nat. (Details) (Comparative Zoology)

Financer
DFG: Graduiertenkollegs - Beteiligungen

Duration of project
Start date: 10/2001
End date: 09/2004

Last updated on 2022-08-09 at 21:05