Isopterygiella alpicola (Lindb.) Ignatov & Ignatova

Ignatova, E. A., Fedorova, A. V. & Ignatov, M. S., 2020, On the genera Isopterygiopsis and Isopterygiella, gen. nov. (Plagiotheciaceae) in Russia, Arctoa 29 (1), pp. 49-62 : 59

publication ID	https://doi.org/10.15298/arctoa.29.03
DOI	https://doi.org/10.5281/zenodo.15446289
persistent identifier	https://treatment.plazi.org/id/11488784-FFEF-FF83-F8C2-AF7AFB6CDCD4
treatment provided by	Felipe
scientific name	Isopterygiella alpicola (Lindb.) Ignatov & Ignatova
status

Treatment

Isopterygiella alpicola (Lindb.) Ignatov & Ignatova View in CoL , comb. nova. —

Stereodon alpicola Lindb., Kongl. Svenska Vetensk. Acad. Handl. , n.s. 23(10): 153–154. 1890. — Isopterygiopsis alpicola (Lindb.) Hedenäs, J.

Bryol. 15(2): 495. 1988. — Isopterygium alpicola (Lindb.) Nyholm, Ill. Moss Fl. Fennoscandia. II. Musci 776. 1969.

Isopterygiopsis Z. Iwats.

Plants small, green or yellowish-green, strongly silky glossy, in loose tufts. Stems strongly complanate, irregularly branched; central strand absent or present, occasionally consisting of few cells; hyalodermis well-developed, rhizoids axillary, purple, coarsely papillose. Leaves apparently distichous, very rarely slightly secund (when growing in inappropriate habitats), ovate-lanceolate to ovate, gradually acuminate or abruptly narrowed into piliferous apiculus, moderately to strongly concave, occasionally cucullate; margins entire; costa short, double; laminal cells linear, basal cells shorter and wider, alar cells not differentiated. Specialized asexual reproduction by axillary propagulae of 3–4 cells in one row. Dioicous. Inner perichaetial leaves short. Capsules erect, rarer inclined, cylindric or slightly curved. Operculum rostrate. Annulus of 1–2(–3) rows of cells. Peristome moderately reduced; exostome teeth whitish or yellowish, striolate below, papillose above; basal membrane of endostome low, ca. 30% of exostome teeth length, segments narrow, not perforated, cilia 1(–2). Spores 8–15(–17) µm. Calyptra cucullate.

Type species: Isopterygiopsis muelleriana (Schimp.) Z. Iwats. (typified by Z. Iwatsuki, who however treated this species in a wide sense, including ‘ Orthothecium catagonioides ’ and keeping in mind solely Asian plants which we refer to a separate species).

The genus inclides two species.