Titre du document / Document title

Antipodal mosses: VIII. Valdonia gen. nov. (Seligeriaceae) from the Kerguelen Province in the Subantarctic

Auteur(s) / Author(s)

OCHYRA Ryszard ⁽¹⁾ ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

⁽¹⁾ Laboratory of Bryology, Institute of Botany, Polish Academy of Sciences, ul. Lubicz 46, 31-512 Kraków, POLOGNE

Résumé / Abstract

The taxonomic position of the Subantarctic species Blindia microcarpa Mitt. is discussed. It is reinstated as a distinct species, definitely different from B. contecta (Hook. f. & Wilson) Müll. Hal. from the antipodal islands of Campbell and Auckland in the cool temperate zone of the Australasian sector. B. microcarpa is considered to be a discordant element in the genus Blindia Bruch & Schimp. which differs from all other congeners by its very small capsules which are turbinate when dry and empty and hemispheric when wet; strongly modified, convolute-sheathing perichaetial leaves; straight or flexuose-secund leaves on drying; peristome teeth granulose on both ventral and dorsal surfaces; lack of prostome and stomata; heterogeneous costal elements; shortly rectangular to subquadrate laminal cells sheathing the long-excurrent costa; and longitudinal cuticular ridges on the leaf cells giving them a papillose appearance in cross-section. A new monotypic genus, Valdonia Ochyra, is established which is placed in the subfamily Dicranoweisioideae within the Seligeriaceae. The single species of the genus, V. microcarpa (Mitt.) Ochyra, endemic to the Kerguelen Province of the Subantarctic, is a constituent of fellfield vegetation and is particularly common on Prince Edward Island and Marion Island in the Prince Edward Islands archipelago. It appears to be less frequent on lies Kerguelen from where it was actually described. The relationships of Valdonia are discussed and the details of the game-tophytes and sporophytes of V. microcapa are illustrated.

Revue / Journal Title

Cryptogamie. Bryologie   ISSN 1290-0796 

Source / Source

2003, vol. 24, n^o2, pp. 87-102 [16 page(s) (article)] (1 p.1/4)

Langue / Language

Anglais
Revue : Espagnol

Editeur / Publisher

Elsevier, Paris, FRANCE  (1999) (Revue)

Mots-clés anglais / English Keywords

Bryophyta ; Musci ; Antarctic Islands ; Prince Edward Islands ; Kerguelen Islands ; Anatomy ; Diagnosis (taxonomy) ; Taxonomy ;

Mots-clés français / French Keywords

Seligeriaceae ; Bryophyta ; Musci ; Iles Subantarctiques ; Valdonia gen. nov. ; Iles Prince Edouard ; Kerguelen ; Anatomie ; Diagnose ; Systématique ;

Mots-clés espagnols / Spanish Keywords

Bryophyta ; Musci ; Islas Subantárticas ; Islas Principe Eduardo ; Kerguelén ; Anatomía ; Diagnosis ; Sistemática ;

Mots-clés d'auteur / Author Keywords

Bryophyta ; Musci ; Seligeriaceae ; Blindia ; Subantarctica ; Kerguelen Province ; Prince Edward Islands ; taxonomy ; distribution ;

Localisation / Location

INIST-CNRS, Cote INIST : 18192 A, 35400011959302.0010