Parapodium

Parapodium

Parapodia (Gr. para, beyond or beside + podia, feet), singular parapodium, are paired, un-jointed lateral outgrowths from the bodies of two different invertebrate groups, which are primarily marine in habitat. These structures are characteristic of Polychaeta, and several clades of sea snails and sea slugs.

Contents

In polychaete worms

The planktonic polychaete Tomopteris

Parapodia in polychaetes are either uniramous or biramous. In the latter case, the dorsal lobes or branches are called notopodia and the ventral branches neuropodia.

Both neuropodia and notopodia can bear cirri (called respectively neurocirri and notocirri) and setae (called respectively neurosetae and notosetae). The cirri between the two branches are called interramal cirri.

In opisthobranch gastropod mollusks

The fleshy protrusions on the sides of some snails are also called parapodia (they are particularly well-developed in sea butterflies). Some sea hares also use their parapodia to swim. Parapodia can be used for respiration (such as gills) also they can be used for locomotion.

Parapodia are found in:

  • Clade Cephalaspidea
  • Clade Thecosomata
  • Clade Gymnosomata
  • Clade Aplysiomorpha

See also

  • Epitoke parapodium

References


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  • Parapodium — Saltar a navegación, búsqueda ? Parapodium Clasificación científica …   Wikipedia Español

  • Parapodium — Par a*po di*um, n.; pl. {Parapodia}. [NL., fr. Gr. para beside + ?, dim. of ? foot.] (Zo[ o]l.) One of the lateral appendages of an annelid; called also {foot tubercle}. [1913 Webster] Note: They may serve for locomotion, respiration, and… …   The Collaborative International Dictionary of English

  • Parapodĭum — (P. E. Meyer.), Pflanzengattung aus der Familie Asclepiadeae Cynancheae; Art: P. costatum, in Südafrika …   Pierer's Universal-Lexikon

  • Parapodium — schematischer Querschnitt durch Nereis pelagica, Borsten und Muskeln des Parapodiums Als Parapodium (Latinisierung von altgriechisch παραπόδιος parapódios ‚vor den Füßen liegend‘)[1] bezeichnet man in der Biologie einen …   Deutsch Wikipedia

  • Parapodium — Pa|ra|po|di|um das; s, ...ien [...i̯ən] (meist Plur.) <aus gleichbed. nlat. parapodium, zu ↑para... u. gr. pódion, Verkleinerungsform von poús, Gen. podós »Fuß«>: 1. Stummelfuß der Borstenwürmer (Zool.). 2. Seitenlappen der Flossenfüßer… …   Das große Fremdwörterbuch

  • parapodium — noun (plural parapodia) Etymology: New Latin Date: 1877 1. either of a pair of fleshy lateral processes borne by most segments of a polychaete worm 2. a lateral expansion on each side of the foot usually forming a broad swimming organ in some… …   New Collegiate Dictionary

  • parapodium — n.; pl. dia [Gr. para, beside; pous, foot] 1. (ANNELIDA: Polychaeta) Paired lateral, fleshy, paddle like appendages that bear one or more cirri; usually consisting of two main divisions, the notopodium and the neuropodium. 2. (MOLLUSCA:… …   Dictionary of invertebrate zoology

  • parapodium — parapodial, adj. /par euh poh dee euhm/, n., pl. parapodia / dee euh/. Zool. one of the unjointed rudimentary limbs or processes of locomotion of many worms, as annelids. [1875 80; PARA 1 + PODIUM] * * * …   Universalium

  • parapodium — noun Paired unjointed lateral outgrowths used for locomotion by worms such as annelids …   Wiktionary

  • Parapodium — Pa|ra|po|di|um 〈n.; s, di|en; Biol.〉 1. als Stummel vorhandener Fuß von Meereswürmern 2. Körperfortsatz von Flossenfüßern (Vorläufer von echten Gliedmaßen) [<grch. para „entlang, neben bei“ + lat. podium <grch. podion „Füßchen“] * * *… …   Universal-Lexikon

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