Pantocsekiella K.T.Kiss & Ács, 2016

Holotype species: Pantocsekiella ocellata (Pantocsek) K.T.Kiss & Ács

Original publication: Ács, E., Ari, E., Duleba, M., Dressler, M., Genkal, S.I., Jakó, E., Rimet, F., Ector, L. & Kiss, K.T. (2016). Pantocsekiella, a new centric diatom genus based on morphological and genetic studies. Fottea, Olomouc 16(1): 56-78, 23 fig., 5 tables.

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Description: Frustules are disc–shaped, solitary, seldom in short chains. Valves circular or slightly quadrangular, the valve face divided into a polygonal central area and a striated marginal one. The polygonal central area is more or less flat or radially undulate (3–5 undulation) or slightly tangentially undulated. The undulated forms with a pattern of three or more small or large alternating lacunae with or without papillae; this pattern is arranged in 6 or more triangular sectors, or the central area with numerous randomly located lacunae and small punctae which do not penetrate the cell wall. The central area can be relatively small or large, not depending on the diameter. The marginal part of the valve is structured by alveolate striae externally, separated by hyaline strips, striae are straight, unequal in length and a few of them are bifurcated. Simple alveolae are present within the marginal area internally. The inner aperture of the alveolae can be round or elongated. Costae are usually equal in length but those bearing a fultoportula are often shorter. The valve has one or a few rimoportulae situated in the submarginal zone on the costa or just below it (sessile internally and round aperture externally); the orientation of the lip varies. Generally, every third to fifth interstria bears a marginal fultoportula but it may occur on each to every 6th interstria. Their internal openings are surrounded by two satellite pores. Valve face fultoportulae (VFP: 1–4) are usually surrounded by two (1–3) satellite pores. In many cases the external openings of VFP are very difficult to observe, because many valves have some punctae irregularly arranged in the central part. Small granules are frequently observed on the interstriae near the margin and found sporadically on the whole valve face.

Origin of description: this description is from the original publication; it may have been modified slightly. The most recent alteration to this page was made on 2022-08-10 by M.D. Guiry.

Taxonomic status: This name is of an entity that is currently accepted taxonomically.

Most recent taxonomic treatment adopted: Kociolek, J.P., You, Q.M., Stepanek, J.G., Lowe, R.L. & Wang, Q.X. (2016). New freshwater diatom genus, Edtheriotia gen. nov. of the Stephanodiscaceae (Bacillariophyta) from south-central China. Phycological Research 64: 274-280, 28 figs.

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Contributors
Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in CD format. These AlgaeBase descriptions are now being continually updated, and each current contributor is identified above. The PSA and AlgaeBase warmly acknowledge the generosity of all past and present contributors and particularly the work of Dr Parker.

Descriptions of chrysophyte genera were subsequently published in J. Kristiansen & H.R. Preisig (eds.). 2001. Encyclopedia of Chrysophyte Genera. Bibliotheca Phycologica 110: 1-260.

Linking to this page: https://www.algaebase.org/search/genus/detail/?genus_id=52112

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 10 August 2022. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 23 November 2024