Sur unMicrosporasymbiotique d'une éponge,Ficulina ficus (M. Ficulinæsp. nov.)

Microspora ficulinae, a green alga living in marine sponges

“…The similarity between the two algae is very great as emphasized by Feldmann (1941), and after the present findings one must regard them as specifically identical. The correct name for the plant in question is Microspora ficulinae P. Dangeard (1932), as the epithet endozootica was not used at the level of species until 1951.…”

“…The chloroplasts became very dark on the addition of iodine, so that no inclusions could be seen in them. However, when Melzer's reagent was used numerous minute dark grains became visible, as seen by Dangeard (1932) in his M. ficulinae. This latter reagent, mainly used by mycologists, combines the iodine with chloral hydrate, which renders the material more transparent.…”

“…They also saw swarmers, which Wille had not observed. Dangeard (1932) reported the occurrence of a similar alga at Roscoff, Brittany, where it formed green patches in the sponge Ficulina (Suberites)ficus (Linnaeus). He did not cite the paper by Wille, and probably did not know of it.…”

Short Communication

“…Previous records have indicated M. ficulinae as occurring in late summer (Dangeard 1932). The extensive development of this sponge community may be attributed to its being sheltered from wave-action, although experiencing strong tidal currents.…”

“…This was because Magne could not demonstrate the presence, in the plastids, of starch, which is a diagnostic feature of the Chlorophyceae. Previously, Dangeard (1932) had described an endobiotic alga from Roscoff, Brittany, in another sponge, Ficulinaficus (L.), now Suberites ficus (L.). Previously, Dangeard (1932) had described an endobiotic alga from Roscoff, Brittany, in another sponge, Ficulinaficus (L.), now Suberites ficus (L.).…”