Thalassodendromyces Vohník & Réblová, 2025

Réblová, Martina, Nekvindová, Jana, Hynar, Ondřej & Vohník, Martin, 2025, From seagrass roots to saline soils: discovery of two new genera in Lulworthiales (Sordariomycetes) from osmotically stressed habitats, IMA Fungus 16, pp. e 157688-e 157688 : e157688-

Thalassodendromyces Vohník & Réblová gen. nov.

Figs 5

Etymology.

Derived from Thalassodendron, the genus of seagrass from which the fungus was isolated, and the Greek word mykes (fungus). Referring to the association of the fungus with the seagrass Thalassodendron.

Type species.

Thalassodendromyces purpureus Vohník & Réblová .

Description.

Asexual morph. Observed exclusively in culture. Conidiophores, conidiogenous cells, and conidia are absent. Mycelium composed of cylindrical, hyaline, subhyaline, or brown, septate, branched, often slightly swollen to monilioid hyphae. Monilioid hyphae develop either terminally or laterally, solitary or in clusters. They are composed of thick-walled, globose to subglobose cells that mature gradually, starting as hyaline and becoming dark brown or dark olivaceous brown with age. Sexual morph. Not observed.

Figures

Figure 5. Halomyrma pluriseptata (ex-type strain CCF 3788). A. Colony; conidia growing on aerial hyphae. B – E. Early stages of conidial development. F – O. Fully developed conidia, exhibiting variability in shape (arrows indicate pores in the walls). P. Colony morphology on PCASW after 3 wk. Q. Diversity of colony morphology on CMD, MLA, OA, and PCA, respectively (from left to right) after 2 wk. Images: on MEA (A, I, M – O); on PCA (B – H, J – L). Scale bars: 500 µm (A); 10 µm (B – O); 1 cm (P, Q).