ascidium

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Related to ascidia: doliolum

ascidium

[ə′sid·ē·əm]
(botany)
A pitcher-shaped plant organ or part.
References in periodicals archive ?
Aunque se ha considerado que las CCNson una innovacion exclusiva de los vertebrados, Shimeld y Holland (10) y Holland y Holland (24) argumentaron que esta afirmacion resulta controversial ya que estudios en anfioxos y ascidias (agnatos) han resultado positivos para estructuras homologas, por lo que el potencial para la diferenciacion de estas poblaciones de celulas ya se encontraba presente en un antecesor de los vertebrados.
Key words: Ecteinascidia turbinata, ascidia, alimentacion, fitoplancton, manglar.
Body wall (easily visible inside smooth Ciona transparent tunic) with five to seven white intestinalis* wide longitudinal muscle bands on each side (often somewhat contracted in fixed animals); animal elongate, flaccid, attached basally Body wall muscles in a meshlike pattern mostly on Ascidia right (uppermost) side but not as above; animal interrupta attached broadly on left side, tunic semi-transparent, thin and not smooth 4.
Outgroup members are limited to two solitary Styelidae and one solitary Ascidia in the order Phlebobranchiata.
In the present study, we investigated the antifouling chemical defense potential of the solitary tunicate Phallusia nigra (= Ascidia nigra) (Savigny, 1816).
When found, the number and position of the bivalves was noted for each ascidia, after which it was removed from the tunic and measured (length and width), using a vernier caliper ([+ or -] 0.
85,000 [+ or -] 15,000 cells/mL); 32% to fine slime; and 8% to copepods, rotifers, and ascidia, in the water column, average transparency was 0.
Las larvas del chorro marino o ascidia tienen un sistema nervioso elemental: dos conglomerados neurales, o ganglios, uno que controla el movimiento y el otro, la digestion.
La ascidia Ecteinascidia turbinata Herdman, 1880 tiene una distribucion anfiatlantica en areas tropicales y subtropicales, que abarca desde las costas espanolas hasta el norte del Brasil (Naranjo 1995).
Three of the four restriction enzymes (Alu I, Ava I, Rsa I) cut the Echinus esculentus and hybrid 28S PCR products into identical-sized fragments that were different from the fragments produced by cutting the Ascidia mentula PCR product (Fig.
They find that minor chemical differences (one C=C bond and the position of a hydroxyl group) between the sperm-activating factors of Ciona and Ascidia account for species-specific chemotaxis.