Phytotaxa

**Taxonomy, phylogeny and ecology of a new bambusicolous Resupinatus species (Agaricales, Resupinataceae) from Northern Thailand**

JULIA EVA CARPOURON — 2024-12-18

The exploration of the fungal diversity associated with bamboos in Northern Thailand has yielded a hitherto undescribed species, Resupinatus reviviscens sp. nov. It is characterized by brownish grey to dark grey basidiomata, basal hairs forming an off-white to yellowish grey subiculum-like felt and composed of hyphae that are thin-walled near the apex and thick-walled near the base, broadly ellipsoid to ellipsoid basidiospores, lack of cheilocystidia and presence of clavate pleurocystidia, and habitat on bamboo culms. Additionally, it has distinct ITS sequences and forms a supported species-level clade separated from other Resupinatus species as revealed by the ML phylogenetic analysis combining ITS and LSU sequences.

Pterula siamensis sp. nov. (Basidiomycota, Pterulaceae) and the first record of Pterulicium xylogenum from Thailand

MICHÉE AKSHAY APPADOO — 2024-12-18

The Pterulaceae, recognized by their coralloid and filiform basidiomes, include species with diverse ecologies. This study identifies a new species, Pterula siamensis, and the first record of Pterulicium xylogenum from Thailand. Diagnostic features of Pterula siamensis are its coriaceous stipe with flexuous, concolorous tips and cylindrical, sometimes capitate cystidia. It possesses unique ITS, LSU, and rpb2 sequences and is phylogenetically separated from other Pterula species with strong support from maximum likelihood bootstrap (99%) and Bayesian posterior probability (1.0) values. Pterulicium xylogenum, which we collected from recently cut bamboo culms and dead bamboo culms, branches, and leaves, has previously been reported as a bamboo and sugarcane pathogen. These findings contribute to a more comprehensive understanding of Pterulaceae diversity and distribution, underscoring Thailand’s extensive fungal biodiversity and emphasizing the necessity for continued research on fungal taxonomy and ecology in the region.

Viola imbricata (Violaceae) a newly discovered local endemic of subgenus Neoandinium from the Andes of Maule and Ñuble Regions, central Chile

KORA MENEGOZ — 2024-12-18

A new species of Viola from the Andes of central Chile is described. The new species is assigned to the Sempervivum section of Neoandinum subgenus, supported by morphological characters. Besides the detailed description of the species, a distribution map, insights about its ecology, conservation status and a key to distinguish Viola imbricata among the southern South American species of Sempervivum section are provided. The taxonomy and morphological similarities of V. imbricata regarding its estimated nearest related species V. abbreviata and V. auricolor are discussed. As most high elevation Andean Viola, V. imbricata is a microendemic species threatened by land use and climate changes.

**Taxonomical remarks on Solenopsis corsica (Campanulaceae) species complex, with the description of two new species from Sardinia**

SALVATORE BRULLO — 2024-12-18

Taxonomical investigations on Solenopsis corsica occurring in Corsica and Sardinia revealed that it represents a species complex, within which some morphologically well distinct taxa can be recognized. The surveyed populations are closely related among them, especially for the habit, with very small leaf hairy rosettes, small-sized flowers with divaricate corolla lips. Apart from S. corsica s.str., widely spread in Corsica, other two new species, morphologically well differentiated can be recognized, they are: S. limbarae and S. corriasii, both occurring in northern Sardinia, where they are localized on the Limbara massif and in other nearby siliceous mountains. The diagnostic features that allow to distinguish these species encompass the size and shape of leaves, bracteoles, flowers, fruits, and seeds. In addition, other differences concern the shape and size of pollen grain and seed testa, as well as their micromorphology. Finally, chorology and ecology of these species are examined, as well as their detailed illustrations and an analytical key of the hitherto known Sardo-Corsican species of this genus are provided.

**Patterns of intraspecific genetic variation of Andoa berthelotiana (Myuriaceae, Bryophyta) in the Azores (Macaronesia)**

SORAIA MARTINS — 2024-12-18

Macaronesia is home to several endemic bryophytes, such as Andoa berthelotiana. Recent genetic studies revealed the existence of two intraspecific lineages within this species, one in Madeira and the Canary Islands and another in the Azores. However, patterns of intraspecific variation within archipelagos, remain a relatively unexplored area of research. In this study we investigate patterns of intraspecific variation of Andoa berthelotiana within the Azorean archipelago and potential associations with elevation. Our investigation is based on the analysis of chloroplast DNA sequences and AFLP data.

The dataset includes trnL-trnF sequences from 23 samples and AFLP data from 34 samples collected in seven of the nine Azorean islands, encompassing elevations of up to 1200 m. For the DNA sequence data haplotype diversity, nucleotide diversity and a statistical parsimony haplotype network were calculated. The AFLP data were analyzed by AMOVA (Analysis of Molecular Variance) and PCoA (Principal Coordinates Analysis). A Chi-Square test was carried out to assess the significance of the relationship between elevation and AFLP groups or trnL-trnF haplotypes, respectively.

The observed intraspecific genetic variation clustered into three trnL-trnF haplotypes and two AFLP groups, without a clear geographical structure across the Azorean archipelago. Group AFLP1 and haplotypes trnL_F1 and trnL_F3 only appeared below 600 m elevation, where low-elevation vegetation (coastal woodlands, lowland forests and montane Laurus azorica forests) prevails, while group AFLP2 and haplotype trnL_F2 occurring along the whole elevational range, but with most samples above 600 m. Associations between elevation and molecular groups were significant according to the Chi-Square test.

Our study reveals the presence of genetic variation within Andoa berthelotiana in the Azorean archipelago. The two main genetic groups do not seem to be related to geographical location of islands nor groups of islands, but rather to elevation. One group exhibits a broader ecological amplitude, whereas the other may be genetically adapted to environmental conditions at lower elevations (below 600 m), which includes the area where the native laurel forests dominate and where anthropogenic activities have altered the majority of natural vegetation. Conservation efforts should therefore not only consider the species Andoa berthelotiana itself, which is associated with natural forest, but also intraspecific genetic diversity of Andoa populations, in particular genotypes restricted to lower elevations.

Bulbophyllum section Macrocaulia (Orchidaceae) in Vietnam

MINH QUAN DANG — 2024-12-18

The paper presents an illustrated taxonomic survey of Bulbophyllum sect. Macrocaulia in the flora of Vietnam including a key to species identification, data on phenology, habitat, distribution and taxonomic notes for all accepted species. The estimated conservation status of these species in Vietnam is also discussed. Additionally, Bulbophyllum papilluliferum is described as a new species for science. The presence of B. ignevenosum in Vietnam is confirmed and documented correcting its long-standing misidentification as B. menghaiense or B. moniliforme.

**Taxonomic and phylogenetic characterizations reveal two new species and a new record of Simplicillium (Cordycipitaceae, Hypocreales) from the Mayao River Valley, Guizhou, China**

WAN-HAO CHEN — 2024-12-18

Simplicillium species are widely distributed and commonly found on various substrates or as a fungicolous fungi. In this research, three arthropod-associated specimens were collected. Two new species, Simplicillium neocoleopterorum and S. vallense, and a new record of S. formicae in China, were isolated, established and described according to a multilocus phylogenetic analysis and their morphological characteristics.

After the conservation of Rubus ulmifolius (Rosaceae)

P. PABLO FERRER-GALLEGO — 2024-12-18

The consequences of the conservation of the name Rubus ulmifolius and related issues are discussed. Special attention is paid to R. creticus and the two names of R. inermis. A new status and name is given to R. inermis Pourret: R. ulmifolius f. sancti-francisci; and R. inermis Willdenow was provided with a new name: R. auritus; an epitype for this name is also designated.

**Supplementary description of the morphological characteristics of Hyalolaena zhang-minglii (Apiaceae)**

CHUCHU WANG — 2024-12-18

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