world of amoeboid organisms



Siemensma, F.J., 1979. Zonnediertjes K.N.N.V. Natura, 76, 4.

Siemensma, F.J., 1980. Amoeben. K.N.N.V Natura, 77, 2.

Siemensma, F.J., 1981. De Nederlandse Zonnediertjes (Actinopoda, Heliozoa). Wet. Med. K.N.N.V., 149 – Hoogwoud.

Siemensma, F.J., 1982. Schaalamoeben. K.N.N.V. Natura, 79, 4.

Siemensma, F.J., Page, F.C., 1986. A light- and electron-microscopical study of Trichamoeba sinuosa n. sp. (Amoebida) with a re-diagnosis of the genus. Protistologica. 22, 117-125.

Willumsen, N.B.S., Siemensma, F.J., Suhr-Jessen, P., 1987. A Multinucleate Amoeba, Parachaos zoochlorellae (Willumsen 1982) comb, nov., and a Proposed Division of the Genus Chaos into the Genera Chaos and Parachaos (Gymnamoebia, Amoebidae).

Siemensma, F.J., 1987a. De Nederlandse Naaktamoeben (Rhizopoda, Gymnamoebia) – Wet. Med. K.N.N.V., 181 – Hoogwoud.

Roijackers, R.M.M., Siemensma, F.J., 1988. A Study of Cristidiscoidid Amoebae (Rhizopoda, Filosea), with Descriptions of New Species and Keys to Genera and Species – Arch. Protistenkd. 135: 237-253.

Siemensma, F.J., Roijackers, R.M.M., 1988a. A study  of little-known acanthocystid heliozoeans, and a proposed revision of the genus Acanthocystis  (Actinopoda, Heliozoea). Arch.Protistenkd.,   135:197-212.

Siemensma, F.J., Roijackers, R.M.M., 1988b. The genus Raphidiophrys (Actinopoda, Heliozoa): scale morphology and species distinction. Arch. Protistenkd.,136:237-248.

Page, F.C., Siemensma, F.J., 1991. Nackte Rhizopoda und Heliozoea – Gustav Fischer Verlag.

Siemensma, F.J., 1991. Heliozoea. In: Page, F. C. & Siemensma, F.J. Nackte  Rhizopoda und Heliozoea.Protozoenfauna, Vol. 2, Fischer Verlag, Stuttgart. pp 171—290.

Mikrjukov, K.A., Siemensma, F.J., Patterson, D.J., 2000. Phylum Heliozoa. In: An Illustrated Guide To The Protozoa, Second Edition, II, 860-871.

Siemensma, F.J., 2014a. Clathrella foreli – Eine nach hundert Jahren wiederentdeckte Amöbe – Mikrokosmos 103, 3.

Siemensma, F.J., Opitz, A.M., 2014b. Beobachtungen an Pseudonebela africana, einer seltenen, doch weltweit verbreiteten Schalenamöbe – Mikrokosmos 103, 4.

Blandenier, Q., Lara, E., Mitchell, E.A.D., Alcantara, D.M.C., Siemensma, F.J., Todorov, M., Lahr, D.J.G., 2017. NAD9/NAD7 (mitochondrial nicotinamide adenine dinucleotide dehydrogenase gene) − a new “Holy Grail” phylogenetic and DNA-barcoding marker for Arcellinida (Amoebozoa)? European Journal of Protistology –

Siemensma, F., Apothéloz-Perret-Gentil, L., Holzmann, M., Clauss, S., Völcker, E., Pawlowski, J., 2017. Taxonomic Revision of Freshwater Foraminifera with the Description of Two New Agglutinated Species and Genera. European Journal of Protistology, 60, 28-44.

Dumack, K., Siemensma, F., Bonkowski, M., 2018. Rediscovery of the Testate Amoeba Genus Penardeugenia (Thaumatomonadida, Imbricatea). Protist, 169, 1, 29-42.

Ntakou, E., Siemensma, F., Bonkowski, M., Dumack, K., 2019. The Dancing Star: Reinvestigation of Artodiscus saltans (Variosea, Amoebozoa) Penard 1890. Protist, 170:349-357.

Recent posts


Genus Spiculophrys Zlatogursky, 2016 Diagnosis: Centrohelids lacking silica scales but with numerous thin, pointed organic (without any traces of silica) scales tapering towards acute apices. 18S

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Acanthocystis drakena

From Zlatogursky, 2016 Acanthocystis drakena Zlatogursky, 2016 Diagnosis: Cells are 21.1-30.5 µm (ca. 26.7) in diameter. Cell is covered with oval plate-scales having a margin

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Choanocystis symna

From Zlatogursky, 2014 Choanocystis symna Zlatogursky, 2014 Diagnosis: Cell body ca. 6.7 µm in diameter. Axopodia three–five times longer than a cell diameter. Plate-scales dumbbell-shaped

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Acanthocystis costata

From Zlatogursky, 2014 Acanthocystis costata Zlatogursky, 2014 Diagnosis: Cell body ca 9.5 µm in diameter. Axopodia 2–3 times longer than cell diameter. Length of spine-scales

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Left: ultra-structure of a kinetocyst of Raphidiophrys contractilis); right: two kinetocysts in an axopodium. Kinetocysts In centrohelid heliozoa, extrusomes are called kinetocysts, and are present

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Yogsothoth carteri

Yogsothoth carteri, after Shishkin and Zlatogursky, 2018 Yogsothoth carteri Shishkin and Zlatogursky, 2018 Diagnosis: Individual cells in a colony have a diameter of 9.7-15.2 µm;

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