Species Of Diderma Research Articles

A new species of Diderma from Bidoup Nui Ba National Park (southern Vietnam)

A new species of Diderma from Bidoup Nui Ba National Park (southern Vietnam)

Diderma velutinum, a new species of Diderma (Myxomycetes) with large columella and triple peridium from Russia

Diderma velutinum, a new species of Diderma (Myxomycetes) with large columella and triple peridium from Russia

New species of Diderma from Vietnam

During intensive studies of the taxonomy and ecology of myxomycetes in Cat Tien National Park (southern Vietnam), two species of Diderma (myxomycetes) were collected during surveys carried out in December 2010 and similar surveys carried out in November 2011 and 2012. These new species, D. cattiense and D. pseudotestaceum, are described and illustrated. D. cattiense resembles D. subasteroides in overall shape, colour and size of the sporocarps but has smaller spores and the ornamentation of spores and the capillitium are different. The main morphological differences between D. pseudotestaceum and D. testaceum lie in shape, colour of sporocarp, columella, spore size and ornamentation. A phylogeny based on the small ribosomal subunit (SSU) and elongation factor 1 alpha (EF1a) genes placed these new species in clades far apart from other species of Diderma.

Myxomycetes of Maharashtra: two new species of Diderma Pers

The present paper provides the description and illustrations of two new species of Diderma (D. non-columellata sp. nov. and D. physarinum sp. nov.) that are characterized by the absence of columella in the first instance and the presence of a large columella bearing a number of peg-like protuberances running through the sporangial cavity up to the peridium in the second instance. The latter condition is similar to what is found in the genus Physarina respectively.

Diderma albo-columella (Myxomycetes), a new species in the Brazilian Atlantic Forest

Abstract A new species of Diderma (Physarales, Didymiaceae) was recorded in the Mata Estrela Private Nature Reserve, Rio Grande do Norte state. It is characterized by sessile sporangia, white globose columella, capillitium irradiating from the peridium, forming three layers, the middle part strongly calcareous, the outer layer cartilaginous and the inner layer membranous. A key to species of sessile sporangia Diderma with triple peridium is presented.

Nivicolous myxomycetes from alpine areas of south-eastern Australia

Nivicolous myxomycetes were collected from alpine areas of south-eastern Australia during the period of middle to late October 2004. Most collections came from the high-elevation area around Mount Kosciuszko, the highest peak on the continent at 2228 m, in the Snowy Mountains of New South Wales, and additional collections were obtained from two areas, Mount Buller and Mount Hotham, in the Victorian Alps of northern Victoria. Approximately 300 collections were obtained during a period of 2 weeks, including species such as Diderma alpinum, Didymium dubium, Lamproderma ovoideum, Physarum albescens and P. alpinum, not previously known to occur in mainland Australia. Lamproderma maculatum and L. zonatum were collected for the first time in the southern hemisphere, and another species of Lamproderma was described as new to science in a previous paper. In contrast to most other areas of the world where nivicolous myxomycetes have been studied, species of Diderma have been represented poorly among the collections from Australia.

Additions to the myxomycetes known from New Zealand, including a new species of Diderma

Specimens of myxomycetes obtained as field collections or from moist-chamber cultures during surveys for these organisms carried out at several localities in New Zealand have yielded eight species not included in the monograph of the group published in 2003. One other species, listed provisionally as Diderma cf. miniatum on the basis of a single, rather limited collection, but now known from several additional collections, is described herein as Diderma novae-zelandiae. These new records bring the number of myxomycetes reported from New Zealand to 196 species.

Studies of Frostfire myxomycetes including a description of a new species of Diderma

The moist chamber culture technique was used to investigate the assemblages of myxomycetes (plasmodial slime moulds or myxogastrids) associated with the microhabitats represented by the bark surface of living black spruce (Picea mariana) trees and forest floor leaf litter in the Caribou–Poker Creek Research Watershed located approximately 50 km north of the city of Fairbanks. This study was carried out in the context of a larger project (Frostfire) that involved an experimental burn of a major portion of this watershed. Our study sites consisted of examples of the two major forest types (black spruce and birch–alder–quaking aspen) found within the watershed. Black spruce trees were sampled at three study sites (two burned sites and one control site), whereas samples of litter were obtained from four study sites (two control and two burned). The acidic bark of black spruce was found to support few myxomycetes, and only five species were recorded from a total of 81 moist chamber cultures prepared with samples of bark. The number of species (16) recorded from the 156 moist chamber cultures prepared with litter was appreciably higher. In general, numbers of species and records for litter and bark were fairly comparable in burned sites versus control sites, with the litter microhabitat of the black spruce forest type the major exception. One of the myxomycetes recovered from litter is a species new to science and is described herein as Diderma boreale.

Three New Species of Diderma

Three New Species of Diderma

Three New Species of Diderma

Three alpine species of Diderma are described as new. Diderma brooksii forms sporangia which contain a large, clavate columella that may attain the apex of the sporangium and a capillitium which forms a distinct, well-defined reticulum. Diderma subcaeruleum forms sessile sporangia which have a thin, bluish gray or steel-gray peridium that appears single. Diderma nigrum forms sessile sporangia that are dark brown or black in color, dehisce in a stellate fashion, have a triple peridium with the middle layer noncrystalline, and the spores often have warts of different sizes which are irregularly distributed.