Sedentary polychaete | invertebrate | Britannica
sedentary polychaete. invertebrate. Also known as: Sedentaria, tube-dwelling polychaete. Learn about this topic in these articles: classification of annelids. In annelid. …are divided into free-moving and sedentary, or tube-dwelling, forms; the earthworms (Oligochaeta); and the leeches (Hirudinea). Read More. In annelid: Critical appraisal.
Class Polychaeta | Segmented Worms | The Diversity of Animal Life
They are often divided for convenience into two groups (formerly the basis of subclasses): sedentary polychaetes, and errant or free-moving polychaetes. Sedentary polychaetes are mainly tubicolous, spending all or much of their time in tubes or permanent burrows.
Polychaete - Wikipedia
Polychaetes are segmented worms, generally less than 10 cm (4 in) in length, although ranging at the extremes from 1 mm (0.04 in) to 3 m (10 ft), in Eunice aphroditois. They can sometimes be brightly coloured, and may be iridescent or even luminescent .
Polychaetes as Habitat Former: Structure and Function
2021年2月6日 · The sedentary polychaetes belonging to the family Sabellariidae are sessile, tube-dwelling species which build tubes from sand and shell fragments cemented together with mucous. Such worms build reefs on sand flats where elements of hard substratum are exposed and used for the settlement of pioneering larvae.
Annelid | Definition, Characteristics, Habitat, Reproduction, Diet ...
2024年10月5日 · A major invertebrate phylum of the animal kingdom, the annelids number more than 9,000 species distributed among three classes: the marine worms (Polychaeta), which are divided into free-moving and sedentary, or tube-dwelling, forms; the earthworms (Oligochaeta); and the leeches (Hirudinea).
Introduction to Annelida and the Class Polychaeta - ScienceDirect
2015年1月1日 · Polychaetes are often divided into two groups based on their activity: sedentary (benthic) polychaetes and errant (free-moving) polychaetes. Sedentary polychaetes spend much or all of their lifetime in tubes or permanent burrows and many of them, especially those that live in tubes, have special adaptations for respiration and feeding.
What are Sedentary Polychaetes? - City University of Hong Kong
The sedentary polychaetes have its prostomium, proboscis and eyes reduced or absent. Most of them live in tubes constructed by themselves in the mud or sand of the ocean bottom. The tubes are straight or U-shaped with two openings.
Ultrastructure and functional morphology of the appendages in …
2021年3月9日 · The sedentary polychaete Sabellaria alveolata, the sandcastle or honeycomb worm, possesses four different kinds of appendages besides the parapodia: opercular papillae, tentacular filaments, palps, and branchiae.
Annelid - Segmented Worms, Clitellates, Polychaetes | Britannica
2024年10月5日 · Classification of free-living and sedentary polychaetes relies almost exclusively on external characters, such as the shape of the head, and on the number and nature of structures, such as appendages (including anal ones), …
Volume 3 Pleistoannelida, Sedentaria III and Errantia I - De …
2020年11月23日 · It is devoted to the remaining Sedentaria and the first branches of Errantia. These sedentary polychaetes are Terebellida and Arenicolida, all of which are tube-dwelling and deposit feeders.
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