A new member of Nerillidae (Annelida: Polychaeta), Xenonerilla bactericola gen. et sp. nov., collected off California, USA
Müller, M.C.M.; Bernhard, J.M.; Jouin-Toulmond, C. (2001). A new member of Nerillidae (Annelida: Polychaeta), Xenonerilla bactericola gen. et sp. nov., collected off California, USA. Cah. Biol. Mar. 42(3): 203-217
In: Cahiers de Biologie Marine. Station Biologique de Roscoff: Paris. ISSN 0007-9723; e-ISSN 2262-3094, meer
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| Auteurs | | Top |
- Müller, M.C.M.
- Bernhard, J.M.
- Jouin-Toulmond, C.
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| Abstract |
A new Nerillidae, Xenonerilla bactericol a, new genus and species, is described from the dysoxic Santa Barbara Basin, off southern California, USA. Common occurrence of the species is restricted to sediments laden with mats of filamentous sulphide-oxidizing bacteria. The body comprises a small prostomium and nine segments; the last is fused with the pygidium. The head has two large, ventrolateral palps, antennae are absent. The first segment (buccal segment) has neither parapodia nor chaetae. Segments II to IX possess parapodial cirri of similar size. Thin capillary chaetae are restricted to posterior segments, only one-two ventral chaetae exist per parapodium. Two pear-shaped anal cirri are present. Distinct characters that separate the new taxon from all hitherto known nerillids are: (1) most specimens completely lack chaetae, while others have only very few chaetae, (2) in the pharyngeal organ, the bulbous muscle is covered anteriorly by an eversible epithelial part. This ventrally located tongue contains intracellular buccal pieces. A brief summary of the 16 known Nerillidae genera is presented in a tabular form. |
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