A new species of Chaetozone (Polychaeta, Cirratulidae) from the Bay of Biscay offshore France, together with a review of Chaetozone species from the North Atlantic and adjacent waters

Abstract

A new cirratulid species of the genus Chaetozone has been discovered offshore in fine muddy sediments in the Bay of Biscay, France. This species is unusual in having an expanded fusiform anterior body region and numerous subdermal glands along the entire body that produce an elaborate and distinctive pattern when stained with Methyl Green. The new species is compared with closely related congeners and a review of Chaetozone species from the North Atlantic Ocean is presented.

Still Digging: Advances and Perspectives in the Study of the Diversity of Several Sedentarian Annelid Families

“…The pygidium is usually simple and rounded, sometimes pointed (e.g., Chaetozone elakata Blake and Lavesque 2017 [99]), and can present terminal cirri in a few species (e.g., Caulleriella venefica Doner and Blake 2006 [100]). However, cirratulids often break upon collection, so the pygidium can rarely be examined.…”

“…Methyl green or methylene blue staining can reveal distinct patterns for some species, mostly of bitentaculate genera, e.g., refs. [99,100]. However, not all species exhibit this pattern, and staining success can vary with the specimens' condition and preservation method.…”

Describing the hidden species diversity of Chaetozone (Annelida, Cirratulidae) in the Norwegian Sea using morphological and molecular diagnostics

“…In Europe, a total of ten Chaetozone species have been reported: C. setosa Malmgren, 1867; C. caputesocis (Saint-Joseph, 1894); C. carpenteri McIntosh, 1911; C. zetlandica McIntosh, 1911; C. corona Berkeley & Berkeley, 1941; C. vivipara Christie, 1984; C. gibber Woodham & Chambers, 1994; C. christiei Chambers, 2000; C. jubata Chambers & Woodham, 2003; C. elakata Blake & Lavesque, 2017. However, the identity and generic position of some of these species (e.g., C. caputesocis , C. zetlandica and C. vivipara ) need to be assessed, as descriptions are vague ( Petersen 1999 ; Blake and Lavesque 2017 ; Le Garrec et al 2017 ).…”

“…elakata Blake & Lavesque, 2017. However, the identity and generic position of some of these species (e.g., C. caputesocis, C. zetlandica and C. vivipara) need to be assessed, as descriptions are vague (Petersen 1999;Blake and Lavesque 2017;Le Garrec et al 2017).…”

The “Spaghetti Project”: the final identification guide to European Terebellidae (sensu lato) (Annelida, Terebelliformia)

“…The lack of experienced taxonomists acting as mentors in France was compensated by the motivation of these young scientists. During the past decade, they have published numerous papers on French polychaete taxonomy (e.g.,Bonifácio et al 2015;Jourde et al 2015;Lavesque et al 2015Lavesque et al , 2020cBlake & Lavesque 2017; Le Garrec et al 2017) with the fundamental help of international experts such as Barnich, Blake, Glasby, Hutchings, Meißner, Londoño-Mesa and Parapar among others.…”