Gibbosporina revisited: new records from Fiji, Indonesia, New Caledonia, Papua New Guinea, and Queensland, with one species from the Solomon Islands transferred to Pannaria.

Published version available at https://nhm2.uio.no/botanisk/lav/RLL/AL/AL87.pdf.More than 40 Australasian collections of the genus Gibbosporina have been studied and found to confirm the concepts of the six species previously known from Australia and Papua New Guinea. Perispore morphology is the character most useful for identification. Gibbosporina nitida appears to be the most common species in the area. Gibbosporina elixii and G. leptospora were previously thought to be very rare, known from only two localities each, but they are reported here from several new localities. Gibbosporina thamnifera was previously known from only the Eungella National Park in Queensland and from one locality in Papua New Guinea, but is now known from further localities. New Caledonia is now known to have three species, G. leptospora newly reported. Fiji also has three species, G. leptospora, G. nitida and G. sphaerospora newly reported here, and G. sphaerospora is also reported as new to Papua New Guinea. Gibbosporina phyllidiata, previously known from only the sterile holotype specimen from the Solomon Islands, is now shown to contain pannarin, and is therefore much better accommodated in Pannaria under its new name P. melanesica</i

A monograph of the lichen family Megalosporaceae

The taxonomy of the family Megaloeporaceae (Lecanorales, lichenised ascomycetes) has been revised basing on an examination of morphology, anatomy and chemistry of thallus and apothecia, and of apothecium ontogeny. The Megalosporaceae are mainly characterised by features of the apothecium ontogeny, by thallus- and apothecium-chemistry, and by a range of spore types. Three genera have been distinguished within this family, Austroblastenia (gen. nov.) with two species, occuring in Australia and New Zealand, Megaloblastenia (gen. nov.) with two species, occuring in Australia, New Zealand and southern South America, and Megalospora, with twenty-five species, concentrated in Australasia, but with representatives throughout the tropical and warmtemperate zones of the world. The delimitation of these genera is based on spore structures. The species delimitations are mainly based on features of the epithecium pigmentation and granulation, spore structure and size, hymenium size and thallus chemistry. Species are defined as entities characterised by at least two independent differentiating characters. Entities with only a single such character (e.g. "chemospecies" or "secondary species") have been treated below specific rank or left unnamed. The delimitation of the genus Megalospora has been changed. Several species had to be transferred to other genera, notably Catinaria, while on the other hand several Bombyliospora species, including its type, as well as a few species with muriform spores, have been included in Megalospora. In all 11 species and 3 subspecies are newly described. Nearly all members of the family inhabit humid, cool forests, often cloud forest in tropical mountains. Basing on a cladistic analysis the ancestor of the family is supposed to have had bicellular spores with thick septa, which supports a relation with the Buelliinae. Most of the evolution of the family is supposed to have taken place on Gondwana-land, from which main migration routes have brought species into tropical Africa and America, into tropical and eastern Asia, and into southern South America

Enkele nieuwe vondsten van Cladonia's in Nederland

Some interesting records of lichens belonging to the genus Cladonia Wigg. are reported. Cladonia cariosa (Ach.) Spreng. and C. fragilissima Østh. & P. James have recently been found for the first time in the Netherlands. C. symphycarpa (Ach.) Fr., hitherto only collected once, has been discovered on a second locality. Short descriptions and comments on the ecology and geographical distribution of these species are given, and tables of phytosociological relevé’s are provided, as well as some drawings of the plant material collected

A field impression of the lichen and bryophyte zonation on Mount Kinabalu

Vegetation descriptions of Mount Kinabalu (4101 m), the highest mountain in tropical Asia between the Himalayas and New Guinea, have resulted in different, conflicting zonations. Some stress more on floristic affinities, others more on physiognomy. A lowland zone reaching to about 1000 m is usually distinguished. The next 2000 m comprising the mountain forests are treated in many different ways. A summit zone (above 3800 m) is recognized rather often (cf. Stapf, 1895; Gibbs, 1914; Meijer, 1963; Van Steenis, 1964; Menzel, 1988). In our opinion the most convincing is the zonation proposed by Van Steenis, who stressed the floristic composition. This comprises three zones: 1. the foothill zone below 1000 m; 2. the montane zone from 1000 to 2500 m; 3. the subalpine zone above 2500 m. Since this zonation was based on phanerogams it was tempting to investigate whether it is reflected in the bryophytes and lichens