DOI: 10.5281/zenodo.16876347
title: Tab. 1 in Staurastrum cyclacanthum var. pseudobrevissimus - a new variety of desmids and some other rare taxa found in peat bogs (Western Pomerania, Poland)

description: Tab. 1. Characteristics of taxa Staurastrum cyclacanthum W. et G.S.West and its described varieties
var. cyclacanthum W. et G.S. West (1902)var. dissimile orig. Pal.-Mordv. (1982)var. brevissimum orig. Pal.-Mordv. (1982)Features of the taxonlength of cells with spines / length of cells without spines according to W. et G.S. West **** 190225.4–49.0 [µm] / 22.0–30.0[µm]****the variety does not occur ****the variety does not occur****according to Croasdale, Flint *** 1988the entire width of the cells 30.0–31.0 [µm] ***the variety does not occur ***the variety does not occur ***according to Pal.-Mordv. * 1982, ** 2005 diameter of cells with spines / diameter of cells without spines23.0–27.0 [µm] /37.0–49.0 [µm]22.0–30.7[µm] /30.0–43 [µm]20.0–21.0 [µm] / 25.4 [µm]Width of spine cells/width of spineless width of spine cellsaccording to W. et G.S. West **** 1902no data available ****the variety does not occur ****the variety does not occur ****according to. Croasdale, Flint *** 1988the entire width of the cells 41.0–53.0 [µm] ***the variety does not occur ***the variety does not occur***Isthmus9.0 [µm] **5.0–9.1 [µm] **7.2 [µm] **8.0 [µm] ***the variety does not occur ***the variety does not occur ***no data available ****the variety does not occur ****the variety does not occur ****Sinuswide open, with a narrow indentation at the top, creating an obtuse angle to the outsidebroadly circular, with a rounded top. sides of the indentation are almost parallelshort, narrowly indented, with a sharp topOther featuressemi-cells with a strongly convex top, with 6 two-spiny papillae on the sides and swollen smooth sides. The indentation of the narrowing between the half- cells is semicircular, quite wide, obtuse, and U-shaped in the inner part.semi-cell with a strongly convex top equipped with 6 two-spiny interconnected papillae on the sides and 1 papilla on each side lying at the base of the outstretched arm, with 2 short spines. The indentation of the narrowing between the half- cells is semicircular, with almost parallel sides in the inner part, U-shaped. The lateral edges of each arm with additional paired spines and one pair lying at the base of the arm. The ends of the arms have two spikes.half-cells with a moderately convex top, triangular in outline, with a slight concave in the middle of the side, indentations between the top, the lateral and top surfaces of the half-cells, with 6 two spiny papillae not connected in a circular wreath. Opposite each side of the half- cell there are two bispinous papillae. The arms are weakly extended with 3 pairs of short spines, two of which are located laterally, 1 pair under the top of the semi-cell arm. The ends of the arms are rounded with two spikes.OccurrenceWestern Europe, and New Zealand. Sri LancaOnly in UkraineOnly in Ukraine
description: Published as part of Komarzewska, Katarzyna & Kowalski, Wojciech W. A., 2024, Staurastrum cyclacanthum var. pseudobrevissimus - a new variety of desmids and some other rare taxa found in peat bogs (Western Pomerania, Poland), pp. 18-19 in Annales Universitatis Paedagogicae Cracoviensis Studia Naturae 9 on page 18, DOI: 10.24917/25438832.9.1, http://zenodo.org/record/16746043