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The Coelomocytes of Nereid Polychaetes
1974The coelomic fluids of most polychaetes, or marine annelids, contain numerous mobile cells which have phagocytic abilities. Many investigators have observed that coelomocytes of several species of polychaetes take up foreign matter and have suggested that they probably remove particulate wastes. This applies equally to nereids (Dehorne, 1922a,b; Romieu,
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Journal of Experimental Marine Biology and Ecology, 1980
Abstract A controlled laboratory experiment showed that the survivorship of the larvae of Nereis vexillosa Grube is significantly lowered by the feeding activities of Eupolymnia heterobranchia (Johnson). Ingestion of larvae by Eupolymnia is suggested as the mechanism of this interaction. E.
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Abstract A controlled laboratory experiment showed that the survivorship of the larvae of Nereis vexillosa Grube is significantly lowered by the feeding activities of Eupolymnia heterobranchia (Johnson). Ingestion of larvae by Eupolymnia is suggested as the mechanism of this interaction. E.
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Larval settlement of polychaetes
1999Many benthic marine invertebrate species have a dispersive larval stage in their life histories. Larvae typically spend hours, weeks, or months developing in plankton before they become competent to settle and metamorphose. Recruitment to benthic populations depends on the numbers of competent larvae transported to sites and/or the interaction between ...
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Molecular systematics of polychaetes (Annelida)
Hydrobiologia, 2005Some progress has been made in the field of molecular systematics of polychaetes over the past couple of years. In particular, phylogenetic analyses of sequence data from the 18S rRNA gene have included increasing numbers of taxa, and explicit hypothesis testing of sister-group relationships is being incorporated into the most recent studies.
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Chaetae and chaetogenesis in polychaetes (Annelida)
Hydrobiologia, 2005Annelid chaetae are epidermal extracellular structures that are in general clearly visible from the exterior. Their structure is highly diverse, especially within the Polychaeta, and each species shows a specific pattern of chaetae. Chaetae have therefore gained immense significance for species determination, making them the best studied structures in ...
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Sense organs in polychaetes (Annelida)
Hydrobiologia, 2005Polychaetes possess a wide range of sensory structures. These form sense organs of several kinds, including the appendages of the head region (palps, antennae, tentacular cirri), the appendages of the trunk region and pygidium (parapodial and pygidial cirri), the nuchal organs, the dorsal organs, the lateral organs, the eyes, the photoreceptor-like ...
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Reviews in Fish Biology and Fisheries, 2018
V. Cole, R. Chick, P. Hutchings
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V. Cole, R. Chick, P. Hutchings
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2015
The Polychaeta or polychaetes are a class of annelid worms, generally marine. Each body segment has a pair of fleshy protrusions called parapodia that bear many bristles, called chaetae, which are made of chitin. Indeed, polychaetes are sometimes referred to as bristle worms. More than 10,000 species are described in this class.
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The Polychaeta or polychaetes are a class of annelid worms, generally marine. Each body segment has a pair of fleshy protrusions called parapodia that bear many bristles, called chaetae, which are made of chitin. Indeed, polychaetes are sometimes referred to as bristle worms. More than 10,000 species are described in this class.
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The fine structure of polychaete septate junctions
Cell and Tissue Research, 1976Epidermal septate junctions of Nereis sp. and Cirriformia sp. fixed with OsO4 or glutaraldehyde/OsO4 display variable structure in electron micrographs. In transverse section the septa are often indistinct and obscured by opaque material that fills the junctional cleft.
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ON THE STRUCTURE AND FUNCTIONS OF POLYCHAETE SEPTA
Proceedings of the Zoological Society of London, 1962There is considerable interspecific variation in the detailed structure of the intersegmental septa of polychaetes. In a few worms, septal muscles are specially developed to produce dorso‐ventral flattening of the body, or to provide horizontal bracing of the thin intersegmental lateral body‐wall. In the majority of species examined, the septa are thin
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