Olivier, Frederic; Lana, Paulo; Oliveira, Veronica; Worsfold, Tim. (2012). Dysponetus joeli sp. nov. (Polychaeta: Chrysopetalidae) from the north-east Atlantic, with a cladistic analysis of the genus and a key to species. Journal of the Marine Biological Association of the United Kingdom. 92(05): 989-996.

163174

10.1017/S0025315412000562 [view]

Olivier, Frederic; Lana, Paulo; Oliveira, Veronica; Worsfold, Tim

2012

92(05): 989-996

Publication

https://doi.org/10.1017/S0025315412000562

World Polychaeta Database (WPolyD)

We describe Dysponetus joeli sp. nov. from shallow maerl habitats in the north-east Atlantic (English Channel and Bay of Biscay). Dysponetus joeli differs from congeneric species by a unique combination of characters, including a large syllid-like pharynx, 2-4 simple serrated neurochaetae (closely similar to notochaetae, but much smaller and more delicate), D-shaped chaetal spines and ventral cirri on the third segment. A phylogenetic parsimony analysis based on morphological traits suggests that Dysponetus is not monophyletic unless it includes the closely related genera Vigtorniella and Pseudodysponetus, which are well delineated inside the dysponetid clade. Chaetal spines seem to be secondarily derived from paleae and to have originated in infaunal dysponetid forms. They should not be considered as plesiomorphic, but as evidence to support the clade made up by Dysponetus-Vigtorniella and Pseudodysponetus as delineated by a phylogenetic analysis.

North Atlantic

Systematics, Taxonomy

Annelida
Polychaeta

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