Fungalpedia – Note 28 Tieghemostelium
Citation: Bhunjun et al. 2023 – Fungalpedia, genera described in 2018, Mycosphere (in press)
Tieghemostelium S. Baldauf, S. Sheikh & Thulin
Index Fungorum, Facesoffungi, MycoBank, GenBank, Fig. 1
Tieghemostelium was introduced in the family Raperosteliaceae in the group of dictyostelids (Sheikh et al. 2018, Wijayawardene et al. 2020). It belongs under the phylum Protozoa of the kingdom Protista, thus the generic name is not considered to apply to an organism within the fungal clade. The new classification and placement of Tieghemostelium is based on molecular phylogenic analysis of small subunit ribosomal RNA (18S rRNA). It is sister to Hagiwaraea and Raperostelium but has unique nucleotides in positions 246-249 and 511-513 in the SSU rRNA gene regions (Sheikh et al. 2018). This genus has sorocarps with cellular stalks, that are colorless and easily crushed. Spores are usually variable from globose, ellipsoid to oblong, sometimes granular. Microcysts are present for most species while macrocysts are recognized for T. lacteum (D. Anderson and J. Cavender, unpublished). Non-streaming aggregation, slug migration is present or absent (Sheikh et al. 2018).
Type species: Tieghemostelium lacteum (Tiegh.) S. Baldauf, S. Sheikh & Thulin
Other accepted species
Tieghemostelium angelicum (Cavender, Vadell, J.C. Landolt & Romeralo) S. Baldauf, S. Sheikh & Thulin
Tieghemostelium dumosum (Cavender, Vadell, J.C. Landolt & Romeralo) S. Baldauf, S. Sheikh & Thulin
Tieghemostelium menorah (Vadell & Cavender) S. Baldauf, S. Sheikh & Thulin
Tieghemostelium montium (Cavender, Vadell, J.C. Landolt & Romeralo) S. Baldauf, S. Sheikh & Thulin
Tieghemostelium simplex (Cavender, Vadell, J.C. Landolt & Romeralo) S. Baldauf, S. Sheikh & Thulin
Tieghemostelium unicornutum (Cavender, Vadell, J.C. Landolt & Romeralo) S. Baldauf, S. Sheikh & Thulin
Fig 1. Tieghemostelium lacteum (strain UI-14). A. Numerous sorogens arising from a single aggregation. B. Base of clustered sorocarps showing cellular structure. C. A single sorogen. D. Sporophore composed of a single tier of vacuolated cells. E. Globose spores. Scale bars: A = 3 mm, B = 1 mm, C = 1 mm, D = 100 µm, E = 5 µm. Redrawn from Sheikh et al. (2018).
References
Sheikh S, Thulin M, Cavender JC, Escalante R, Kawakami S, Lado C, Landolt JC, Nanjundiah V, Queller DC, Strassmann JE, Spiegel FW, Stephenson SL, Vadell EM, Baldauf SL. 2018. A New Classification of the Dictyostelids. Protist 169: 1–28.
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Entry by
Allen Grace T. Niego, School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand; Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand; Iloilo Science and Technology University, La Paz, Iloilo 5000, Philippines
(Edited by Chitrabhanu S. Bhunjun and Kevin D. Hyde)
Published online 18 May 2023