Results 181 to 190 of about 10,305 (229)

Functional Morphology of Eunicidan (Polychaeta) Jaws

The Biological Bulletin, 2017
Polychaetes exhibit diverse feeding strategies and diets, with some species possessing hardened teeth or jaws of varying complexity. Species in the order Eunicida have complex, rigid, articulated jaws consisting of multiple pairs of maxillae and a pair of mandibles.
W Cyrus, Clemo, Kelly M, Dorgan
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A revision ofSabellastarte(Polychaeta: Sabellidae)

Journal of Natural History, 2003
Sabella indica Savigny, 1822 (‘Indian Ocean’) is the type of Sabellastarte, but that name is preoccupied in the Pectinariidae. Sabellastarte sanctijosephi (Gravier, 1906, as Eurato, from Djibouti) has sometimes been used in its place, ignoring more suitable forms and older names. Sabellastarte spectabilis (Grube, 1878, Philippines) with an Indo-Pacific
Knight-Jones, Phyllis, Mackie, Andrew S. Y.   +1 more
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Anellida: Holoplanktonic Polychaeta

2017
This chapter describes the taxonomy of Polychaeta, an almost exclusively marine group of organisms belonging to the phylum Annelida. With over 10,000 species described worldwide, they represent one of the most abundant animal taxa in the marine environment. The chapter covers their life cycle, ecology, and general morphology. It includes a section that
Claudia Castellani, Robert Camp
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THE SPERMATOZOA OF THE POLYCHAETA (ANNELIDA): AN ULTRASTRUCTURAL REVIEW

Biological Reviews, 1989
Summary1. Polychaete sperm are divisible into ect‐aquasperm, ent‐aquasperm, and introsperm.2. Ect‐aquasperm are the commonest type of polychaete sperm and are considered plesiomorphic for the Polychaeta. Re‐evolution of ect‐aquasperm (as neo‐aquasperm) is, nevertheless, tentatively hypothesized for some Sabellida.3.
B G, Jamieson, G W, Rouse
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Pigments of Chaetopterus variopedatus (polychaeta)

Proceedings of the Royal Society of London. Series B - Biological Sciences, 1959
Abstract A chemical and histological study has been made of the pigments of the polychaete worm Chaetopterus variopedatus. The conspicuous green colour of the gut in the middle and posterior regions is due to a green pigment hitherto known as ‘chaetopterin’, which is localized in small green spherules in the gut epithelial cells ...
G Y, KENNEDY, J A, NICOL
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Evolution of interstitial Polychaeta (Annelida)

Hydrobiologia, 2005
An update of the systematics is given for the eight most important interstitial polychaete families: Diurodrilidae, Nerillidae, Protodrilidae, Protodriloididae, Saccocirridae, Parergodrilidae, Polygordidae and Psammodrilidae. Additional information and new observations are presented for the Diurodrilidae, Nerillidae and Psammodrilidae.
Worsaae, Katrine, Kristensen, Reinhardt Møbjerg   +1 more
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THE GENERA OF ARENICOLIDAE (POLYCHAETA)

Proceedings of the Zoological Society of London, 1959
SUMMARYIt is argued that the species currently grouped as Arenicola Lamarck should be distributed between Arenicola, Arenicolides Mesnil and Abarenicola gen. nov.Formal diagnoses of the family and its constituent genera are given, and suggestions are made as to the most convenient characters for referring arenicolid worms to their genera.
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Anchorage of embryos in Spirorbinae (Polychaeta)

Marine Biology, 1972
Methods of incubation are taxonomically important in Spirorbinae. About half of the known species incubate in the operculum, but the remainder are usually described simply as “incubating within the tube”. Studies of tube incubation show that the embryos are anchored in various ways.
E. W. Knight-Jones, P. Knight-Jones, P. J. Vine   +2 more
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THE HISTOLOGY OF THE BLOOD SYSTEM IN OLIGOCHAETA and POLYCHAETA

Biological Reviews, 1949
Summary1. A survey of accounts of the histology of the blood system in the various families of the Oligochaeta and Polychaeta has revealed a surprising lack of agreement among descriptions not only of the same family, but often of the same genus or species. There are several reasons for this.
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THE POLYCHAETA OF THE COAST OF NORFOLK

1966
All the species of polychaetes known from Norfolk waters are listed; 48 were found here by previous authors and 91 are recorded in this paper for the first time. The occurrence of each species is briefly stated. Observations are made on colour patterns, reproductive biology, food, morphological variation, taxonomy, commensalism and parasites, and a ...
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