CATALOG - Rhabdosphaera longistylis


Folder trail: ntax_Farinacci -> R -> Rhabdosphaera -> Rhabdosphaera longistylis
Folders this level: R. ampullacea, R. brevispina, R. claviger, R. echinata, R. elliptica, R. gladius, R. herculea, R. hirsuta, R. inflata, R. longistylis, R. multistylis, R. murrayi, R. nigra, R. otwayensis, R. paxillifera, R. piriformis, R. prijedorensis, R. procera, R. pseudomorionum, R. rudis, R. ruginiensis, R. semiformis, R. siliqua, R. spinosa, R. spinula> >>

Original descriptions of taxa. For coccolithophores, and many calcispheres, these are pages from the Catalog of Calcareous Nannofossils. In other cases (e.g. non-calcifying haptophytes) the data is directly compiled on this site. The "Catalogue of Calcareous Nannofossils" was compiled by Prof A. Farinacci 1969-1989 and updated by Richard Howe 2000-2016 - see also this page.
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Current identification/main database link: Unidentifiable coccolithophore

Compiled data

Citation: Rhabdosphaera longistylis Schiller 1925
Rank: Species
Type locality: Adriatic Sea
Type age (chronostrat): Recent
Type repository: Vienna Univ, Botany Dept ? (this is where Schiller was based)
Repository Country: Austria
Farinacci catalog page (& compiler): 9200
Language: DE
Current citation: Unidentifiable coccolithophore


Original Description
Description:
Schale regelmässig kugelförmig, 20-25 µ im Durchmesser, zart und durchsichtig, ohne wahrnehmbare Poren (bei der angewandten Vergrösserung 1800x). Schale besetzt mit weit auseinanderstehenden Rhabdolithen, deren Basalscheiben 4-5 µ breit sind und aus denen sich ein 38-40 f.L langer, in der Mitte etwas dickerer zugespitzt endigender Fortsatz erhebt, dessen Durchbohrung nicht sicher ist. Geissel nicht gesehen. Chromatophoren 2, sehr blassgelb.

Translated Description:
Shell regularly spherical, 20-25 µm in diameter, delicate and transparent, without noticeable pores (at the applied magnification 1800x). The shell is set with widely spaced rhabdoliths, the basal disks of which are 4-5 µm wide and from which a 38-40 µm long, in the middle slightly thicker, pointed extension rises, the piercing of which is not certain. Flagellum not seen. Chromatophores 2, very pale yellow.



Extra details from original publication
Remarks:
Bei dieser Form habe ich vergebens viel Mühe auf die Feststellung eines die Fortsätze durchziehenden Kanales gelegt, und ich halte es für mehr als wahrscheinlich, dass bei den Rhabdosphären mit dünnen Fortsätzen die Durchbohrung fehlt.
Weiter dürfte hier neben kohlensaurem Kalke noch eine säurefeste Substanz in die Kalkkörper eingelagert sein, da ich bei Einwirkung sehr verdünnter Salzsäure oder Schwefelsäure die Fortsätze und in gewissem Sinne auch die Schale formbeständig fand. Weiter stellt Rh. longistylis eine der wenigen Coccolithophoriden dar, die auf salzarmes Wasser beschränkt ist.

Remarks:
With this form I have tried in vain to identify a canal running through the appendages, and I consider it more than likely that the rhabdospheres with thin appendages lack the perforation.
In addition to carbonate of lime, an acid-fast substance is likely to be embedded in the lime body, since I found the projections and, in a certain sense, the shell to be dimensionally stable when exposed to very dilute hydrochloric or sulfuric acid. Furthermore, Rh. longistylis is one of the few coccolithophores that is restricted to low-salt water.

Editors' Notes
It is not clear which species was described here and it is quite possible that it was not a coccolithoohre. The drawing of the coccosphere resembles Rhabdosphara xiphos and Palusphaera vandeli and the name R. longistylis has been applied to these coccolithopohres in the literature. However, both these species are much smaller than Schiller describes - with the central coccosphere ca 10 µm across  vs 20-25 µm and the spines  5-10 µm long vs 38-40 µm.  Meringosphaera mediterranea is nearer in size but has undulating spines.

References:

Schiller, J. (1925). Die planktonischen Vegetationen des adriatischen Meeres. A. Die Coccolithophoriden-Vegetation in den Jahren 1911-14. Archiv für Protistenkunde. 51: 1-130. gs V O


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Rhabdosphaera longistylis: Catalog entry compiled by Anna Farinacci. Viewed: 12-5-2021

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