Table 1.
Systematic treatment of the class Myxomycetes (according to [12]), number of genera and species (according to Nomenmyx, http://eumycetozoa.com/data/index.php, updated 20.7.12) and percentage of genera and species sequenced in this study.
Figure 1.
SSU rRNA gene tree of Lucisporidia derived by Bayesian inference of 1325 nucleotide positions of 51 sequences, with Ceratiomyxa fruticulosa as outgroup.
Species names are followed by GenBank accession number, except for sequences obtained during this study (in bold), whose accession numbers and collection sites are in Table S1. Clades are highlighted and labelled according to current classification or as new. Bayesian posterior probabilities (BPP)/ML bootstrap replicates (MLB) are shown for each branch; dashes indicate a conflicting topology in the ML tree; a dot on the line indicates maximum support in both analyses. The scale bar indicates the fraction of substitutions per site. Credit photos: A, F, G, J–M: Michel Poulain; B–E, H, I, N–P: Alain Michaud.
Figure 2.
Bayesian phylogeny of Lucisporidia inferred from concatenated alignments of SSU rRNA and EF-1α genes, based on 41 sequences and 1705 positions, with Ceratiomyxa fruticulosa as outgroup.
Clades are highlighted as in Fig. 1. Bayesian posterior probabilities (BPP)/ML bootstrap replicates (MLB) are shown for each branch; a dot on the line indicates maximum support in both analyses. In Trichiida, classical families (according to [12]) are indicated by an ellipse with the initials (Arc = Arcyriidae; Dia = Dianemidae; Tri = Trichiidae). The scale bar indicates the fraction of substitutions per site.
Figure 3.
Pseudoaethalia and aethalia in Reticulariidae.
A. Tubifera ferruginosa, pseudoaethalium seen from above. B. Vertical section showing sporangia surrounded by peridia; note the lack of capillitium in the spore mass. C. Lycogala epidendrum, aethalia seen from above. D. Vertical section of the same, with the spore mass blown away and the abundant pseudocapillitium. Scales and colours are approximate. Credit photos: Michel Poulain.
Figure 4.
Pseudoaethalium of Dictydiaethalium plumbeum.
A. Pseudoaethalium seen from above. B. Vertical section with the spore mass partially blown away, showing the renmants of the peridia as hexagonal caps on the upper surface and vertical fine threads connecting them to the base of the fructification. Scales and colours are approximate. Credit photos: Michel Poulain.
Figure 5.
Dianema nivale, vertical section with the spore mass partially blown away, showing the capillitium connecting the peridium with the base of the fructification.
Scale and colours are approximate. Credit photos: Michel Poulain.
Figure 6.
Four different capillitial threads in Trichiida.
A. Capillitial threads of Trichia varia: isolated threads sculptured with spiral bands, two very short ones are indicated by a black line. B. Capillitial threads of Arcyria obvelata, forming a network and sculptured with spines. C. Capillitial threads of Oligonema flavidum, short and in this case branched, smooth. Note the reticulate ornamentation of the spores, similar to that of Oligonema schweinitzii and Trichia persimilis. D. Capillitial threads of Cornuvia serpula, branched and ornamented with rings. Scale and colours are approximate. Credit photos: Michel Poulain.
Figure 7.
A. Vertical section of the stalk and the base of the sporotheca of Hemitrichia calyculata, showing the stalk filled with spore-like bodies. Those are larger and clearer than the spores in the sporotheca above, without clear demarcation. B. Vertical section of the stalk and the base of the sporotheca of Trichia decipiens, showing the stalk filled with spore-like bodies and few capillitial filaments. C. Greater magnification of the spore-like bodies of Trichia decipiens. Scale and colours are approximate. Credit photos: Michel Poulain.