New species and records of deep-water Cirratulidae (Polychaeta) from off Northern California
Polychaetes of the family Cirratulidae are among the most important macrofaunal invertebrates in deep-sea benthic communities off northern California. The genus Chaetozone includes several species that are among the dominant species in depths of 2400-3200 m. Four of the most common species of Chaeto...
| Published in: | Scientia Marina |
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| Main Author: | |
| Format: | Article in Journal/Newspaper |
| Language: | English |
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Consejo Superior de Investigaciones Científicas
2006
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| Online Access: | https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/108 https://doi.org/10.3989/scimar.2006.70s345 |
| Summary: | Polychaetes of the family Cirratulidae are among the most important macrofaunal invertebrates in deep-sea benthic communities off northern California. The genus Chaetozone includes several species that are among the dominant species in depths of 2400-3200 m. Four of the most common species of Chaetozone are described in this paper. Of these four species, only C. spinosa Moore, 1903 has been previously described. Three other species are new to science. C. brunnea, n. sp. has a short, triangular-shaped prostomium, brown body colour, and an enlarged “stomach” which distends the body in a characteristic pattern. C. allanotai, n. sp. has a unique methyl green staining pattern that provides a means to readily identify juveniles and fragmented adults. A third new species, C. palaea, n. sp has posterior spines that are unusually broad, providing a spectacular armature. These species are compared with the type species, C. setosa from the Arctic. New details concerning segmentation of the anterior end, morphology of the nuchal organs, and posterior spines, represent a suite of characters that, in combination, will be used in a phylogenetic analysis of cirratulid polychaetes. Los poliquetos de la familia Cirratulidae se encuentran entre los invertebrados macrofaunales más importantes de las comunidades bentónicas de aguas profundas del Norte de California. El género Chaetozone incluye varias especies que se encuentran entre las dominantes entre los 2400-3200 m de profundidad. En este trabajo se describen cuatro de las especies más importantes del genero Chaetozone. De estas cuatro especies, únicamente C. spinosa Moore ha sido previamente descrita. Las otras tres especies son nuevas para la ciencia. C. brunnea, n. sp. tiene prostomio corto, triangular, cuerpo de color marrón, y un “estómago” dilatado que distiende el cuerpo dándole una forma característica. C. allanotai, n. sp. presenta un patron de tinción con Verde de Metilo único, que proporciona un medio para la fácil identificación de juveniles y fragmentos de ... |
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