Renata Manconi

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Here, we report the presence of the γ-aminobutyric acid (GABA)-ergic system in the calcisponge Leucandra aspera and examine the cellular localization of the components of this system, including GABA-like receptors using immunofluorescence and confocal microscopy. Furthermore, we demonstrate for the first time that GABA plays a functional role as a messenger(More)
Spongillida (Porifera) colonized temporary freshwater bodies at the global level. To enhance colonization, survival, long-term persistence, and dispersal, most continental sponges display cryptobiosis as dormancy of resting bodies, i.e. asexual gemmules, 0.25–1 mm in diameter, containing staminal cells protected by a collagenous theca usually armed by(More)
Three polyprenyl-1',4'-hydroquinone derivatives, heptaprenyl-1',4'-hydroquinone (1), octaprenyl-1',4'-hydroquinone (2), and hydroxyoctaprenyl-1',4'- hydroquinone (3) were isolated from the marine sponge Sarcotragus spinosulus collected at Baia di Porto Conte, Alghero (Italy). Our findings indicate that the compounds isolated from S. spinosulus can(More)
A new sponge species (Demospongiae: Agelasida: Agelasidae) is described from the eastern coast of Unguja Island in the Zanzibar Archipelago. Agelas sansibarica sp. n. is compared to all other Agelas species described so far. The new species differs from its congeners mainly in its three categories of verticillate spicules (acanthostyles, acanthostrongyles,(More)
In this paper we report a new species of Dugesia of the family Dugesiidae from Madagascar, representing the fourth species of freshwater planarian known from this global biodiversity hotspot. In some respects the new species is aberrant, when compared with its congeners, being characterized by a head with smoothly rounded auricles, a peculiar course of the(More)
The present synthesis focuses on the so called 'horny sponges' recorded from marine caves of the Mediterranean Sea. The main aim is to provide a list of all recorded species, diagnostic keys to their identification up to family and genus level, and exhaustive, formally uniform descriptions at the species level contributing to sharing of information on the(More)
A new species of the genus Dugesia is described from the Lake Ohrid region in the western part of the Balkan Peninsula, forming the first fully documented species description for this genus in the Ohrid area. The morphological species delimitation is supported by complementary molecular, karyological, and cytogenetic data available from the literature.(More)
Gamma-amino butyric acid (GABA) is believed to be the principal inhibitory neurotransmitter in the mammalian central nervous system, a function that has been extended to a number of invertebrate systems. The presence of GABA in the marine demosponge Chondrilla nucula was verified using immunofluorescence detection and high-pressure liquid chromatography. A(More)
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