Published October 29, 2025 | Version v1
Taxonomic treatment Open

Planothidium lanceolatum Lange-Bertalot 1999, s. l.

  • 1. К. А. Timiryazev Institute of Plant Physiology RAS, IPP RAS, 35 Botanicheskaya St., Moscow, 127276, Russia & Faculty of Biology, M. V. Lomonosov Moscow State University, Leninskie Gory 1, building 12, Moscow, 119234, Russia
  • 2. К. А. Timiryazev Institute of Plant Physiology RAS, IPP RAS, 35 Botanicheskaya St., Moscow, 127276, Russia
  • 3. К. А. Timiryazev Institute of Plant Physiology RAS, IPP RAS, 35 Botanicheskaya St., Moscow, 127276, Russia & К. А. Timiryazev Institute of Plant Physiology RAS, IPP RAS, 35 Botanicheskaya St., Moscow, 127276, Russia

Description

Planothidium lanceolatum (Brébisson ex Kützing) Lange-Bertalot (1999: 287) s. l. (Fig. 11)

Morphology: Valves elliptic-lanceolate or elliptic, 15.3–17.5 µm long, 5.8–6.0 µm wide. Apices broadly rounded, usually subcapitate. Axial area narrow, linear. Central area bowtie-shaped at the raphid valve and unilateral at the rapheless valve (a sinus is present). Raphe filiform, straight. Striae density—16.5–17.5/10 µm. Areolae unresolvable in LM.

Representative samples: O-1, O-5, O-8, O-9, O-10, O-11, O-13, O-15, O-16, O-103, O-L.

Ecology: found in samples with pH=5.16–8.60, t=6.3–13.7°С, Ec=10–420 µS/cm, TDS<0.20 ppt. Salinityindifferent, alkaliphilic, β-mesosaprobic.

Notes

Published as part of Mironov, Andrei, Glushchenko, Anton, Kezlya, Elena & Kulikovskiy, Maxim, 2025, Species composition of the diatom communities in the watercourses of Northeastern Kamchatka with comments on abundant taxa and description of Gomphonema lepskayae sp. nov., pp. 1-19 in Phytotaxa 726 (1) on page 10, DOI: 10.11646/phytotaxa.726.1.1, http://zenodo.org/record/18425751

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Linked records

Additional details

Biodiversity

Scientific name authorship
Lange-Bertalot
Kingdom
Chromista
Phylum
Ochrophyta
Order
Achnanthales
Family
Achnanthidiaceae
Genus
Planothidium
Species
lanceolatum
Taxon rank
species
Taxonomic concept label
Planothidium lanceolatum , 2025