Rudolgaea borealis (Frisvoll & Moen) Potemkin & Vilnet,, 2021

Potemkin, A. D. & Vilnet, A. A., 2021, Reappraisal of Gymnocolea and description of a new genus Rudolgaea (Anastrophyllaceae, Marchantiophyta), Arctoa 30 (2), pp. 138-148 : 145

Rudolgaea borealis (Frisvoll & Moen) Potemkin & Vilnet, comb. nov. Fig. 6

Basionym: Lophozia borealis Frisvoll & Moen, 1980 , Lindbergia 6: 138. f. 1–3.

Descriptions: Frisvoll & Moen, 1980; Damsholt, 2002, 2013.

Illustrations: Schuster, 1969: Fig. 251: 14–18 as Gymnocolea inflata (illustrated specimen RMS 45791 attributed to G. borealis by Schuster, 1986: 6); Frisvoll & Moen, 1980: Figs. 1–4 ; Damsholt, 2002: Plate 53, reprinted in Damsholt, 2013: Plate 46; Potemkin et al. (2021): Fig. 1 .

Distribution. Arctic and subarctic, probably circumpolar, indefinite yet because of specific habitats.

Figures

Fig. 6. Rudolgaea borealis (Troeva G1-138, LE). A, B: shoot sectors; C: lobe; D, F: stem transverse sections; E: basal leaf cells. Scale bars: for A, B: 750 µm; C: 18 µm; D, E: 30 µm; F: 19 µm. From Potemkin et al. (2021).

Fig. 1. Phylogram obtained in a maximum likelihood analysis for the suborder Cephaloziineae based on combined nucleotide sequences dataset of ITS1-2+trnL-F. Bootstrap support values of maximum parsi- mony, maximum likelihood analyses and Bayesian posterior probabilities more than 50% (0.50) are indicated.

Fig. 2. Phylogram obtained in a maximum likelihood analysis for the suborder Cephaloziineae based on rbcL. Bootstrap sup- port values of maximum parsimony, maximum likelihood analyses and Bayesian posterior probabilities more than 50% (0.50) are indi- cated.

Fig.3. Rudolgaea fascinifera (Potemkin 92-9701, LE, holotype). A, B: habit of plants. Scales:1 mm.

Fig. 4. Rudolgaea fascinifera (Potemkin 92- 9701, LE, holotype). A–D: leaves; E: dorsal cortical cells; F: basal leaf cells with striolate papillose surface; G: ventral leaf base with rhizoids. Scales: A, B: 160 µm, C, D: 125 µm, E, F: 25 µm, G: 100 µm.