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world of amoeboid organisms

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Publications

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 – https://dx.doi.org/10.1016/j.ejop.2016.12.002.

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.

Siemensma, F., Dumack, K., 2019. SSU rDNA Phylogeny Indicates the Scale-lacking Trivalvularida ord. nov. as a Sister Group to the Euglyphida (Cercozoa, Rhizaria) Protist, 171:1. https://doi.org/10.1016/j.protis.2019.125701

Dumack, K., Siemensma, F., 2020. Shell Colour in Cercozoa; a Simple Trait to Distinguish Thecofilosea from Imbricatea? Protist, XX. https://doi.org/10.1016/j.protis.2020.125718

Najla Baković, N., Siemensma, F.J., Baković, R., Rubinić, J., 2019. Testate amoebae in karst caves of the Dinaric arc (South-Eastern Europe) with a description of Centropyxis bipilata sp. nov. Acta Protozoologica, 58.

Siemensma, F., Holzmann, M., Apothéloz-Perret-Gentil, L., Clauss, S., Völcker, Bettighofer, W., E., Khanipour Roshan, S., Walden, S., Dumack, K., Pawlowski, J., in prep.: Broad sampling of monothalamids (Rhizaria, Foraminifera) gives further insight into diversity of non-marine foraminifera.

Recent posts

Penardochlamys arcelloides

P. arcelloides – after Penard, 1904 Penardochlamys arcelloides  (Penard, 1904) Deflandre, 1953 Diagnosis: Colorless or very slightly yellowish envelope, bag or cauldron-shaped, very thin, chitinous,

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Reticulomyxa hannae

R. hannae, plasmodium – photomicrograph Steffen Clauss Reticulomyxa hannae Völcker and Clauß, 2020 Diagnosis: Trophozoites surrounded by a very thin mucous envelope, with slowly moving plasmodia, variable

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Velamentofex saxonensis

V. saxonensis, feeding (photomicrograph Steffen Clauss) Velamentofex saxonensis Völcker and Clauß, 2020 Diagnosis: Trophozoites ovoid, 30-95 μm, granuloreticulopodia up to 1000 μm long. with a hyaline, thin

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Velamentofex tyrolensis

V. tyrolensis (photomicrograph Steffen Clauss) Velamentofex tyrolensis Völcker and Clauß, 2020 Diagnosis: Trophozoites ovoid, 98-125 μm, with reticulopodia up to 300 μm long, with a hyaline,

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Velamentofex berolinensis

V. berolinensis Velamentofex berolinensis Völcker and Clauß, 2020 Diagnosis: Trophozoites ovoid, 50-300 µm, with a hyaline, extremely flexible, membranous test. Nuclei numerous, 11.6-16.2 µm in diameter,

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Lieberkuehniidae

 Lieberkuehniidae  Siemensma, Holzmann, Apothéloz-Perret-Gentil, Clauß, Voelcker, Bettighofer, Khanipour Roshan, Walden, Dumack and Pawlowski, 2020 Diagnosis: Multinucleate organic-walled monothalamous foraminifera. Test very flexible, elongated to broadly

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