Dipleurula

Diagrammatic reconstruction of Dipleurula from Encyclopædia Britannica, 1911. The creature is represented crawling on the sea-floor, but it may equally well have been a floating animal. The ciliated bands are not drawn.

Dipleurula is a hypothetical larva of the Echinoderms. It represents the type of basis of all larva forms of the Eleutherozoa, to which the sea-stars, sea-hedgehog, sea-rollers and sand stars belong. The Dipleurula is a bilaterally symmetrical, ciliated echinoderm larva.

Dipleurula represents an ancestral form for these primitive deuterostomes.

We can see that all well-known forms of larvae of Echinodermata are derived from the hypothetical dipleurula. Among them fall the Bipinnaria and the Brachiolaria of the sea-stars, the Auricularia of the sea-rollers and the Plutei of the sea-hedgehogs, and the sand stars. Also the Doliolaria of the Pelmatozoa (sea-lilies and feather stars) can be attributed to the same basic pattern, even if they do not have a mouth opening.

References

External links

• Information on forn

This echinoderm-related article is a stub. You can help Wikipedia by expanding it.v · Categories: Developmental biology Echinoderms Developmental biology stubs Echinoderm stubs Wikimedia Foundation. 2010. Игры ⚽ Нужно решить контрольную? Meir Randegger Cardboard City (London) Look at other dictionaries: Dipleurula —   [griechisch], Dipleurulalarve, die Larve der Stachelhäuter …   Universal-Lexikon Dipleurula — Dipleurula, bilateralsymmetrische Larve der ⇒ Echinodermata (Stachelhäuter), auf die sich die Larven der einzelnen Echinodermengruppen (z.B. Pluteus der Seeigel, Bipinnaria der Seesterne) zurückführen lassen; drei hintereinander liegende… …   Deutsch wörterbuch der biologie Dipleurula — Die Dipleurula ist eine nur hypothetisch existierende Larvenform der Stachelhäuter (Echinodermata). Sie stellt den Basistyp aller Larvenformen der Eleutherozoa dar, zu denen die Seesterne, Seeigel, Seewalzen und Schlangensterne gehören. Die… …   Deutsch Wikipedia dipleurula — n. [Gr. dis, twice, dim. pleuron, side] (ECHINODERMATA) Collective term applied to planktonic bilaterally symmetrical, ciliated larvae; echinopaedium; see auricularia, doliolaria, pluteus, bipinnaria …   Dictionary of invertebrate zoology dipléurula — ► femenino ZOOLOGÍA Forma larvaria pelágica, típica de los equinodermos …   Enciclopedia Universal dipleurula — di·pleu·ru·la …   English syllables dipleurula — …   Useful english dictionary echinoderm — /i kuy neuh derrm , ek euh neuh /, n. any marine animal of the invertebrate phylum Echinodermata, having a radiating arrangement of parts and a body wall stiffened by calcareous pieces that may protrude as spines and including the starfishes, sea …   Universalium Echinoderm — Stachelhäuter Schlangenstern Systematik Reich: Vielzellige Tiere (Metazoa) Abteilung …   Deutsch Wikipedia Echinodermata — Stachelhäuter Schlangenstern Systematik Reich: Vielzellige Tiere (Metazoa) Abteilung …   Deutsch Wikipedia 18+ © Academic, 2000-2024 Contact us: Technical Support, Advertising Dictionaries export, created on PHP, Joomla, Drupal, WordPress, MODx. Mark and share Search through all dictionaries Translate… Search Internet Share the article and excerpts Direct link … Do a right-click on the link above and select “Copy Link”