Tilachlidium setigerum is a species of fungus in the family Tilachlidiaceae, order Hypocreales, class Sordariomycetes, phylum Ascomycota. It is characterized by its white to cream-colored, hairy, and irregularly shaped stromata, typically 1-5 mm in diameter, with setae (hairs) up to 1 mm long. In East and Central Texas, T. setigerum has been found on decaying wood and plant debris, often associated with hardwood trees such as oak and maple, particularly in moist, shaded areas like stream banks and woodland floors.
Mold like fungus Tilachlidium setigerum(?) parasitising on gingertail (Xeromphalina campanella) on a pine log in Big Creek Scenic Area of Sam Houston National Forest. Shepherd, Texas, November 27, 2019
Lone Star Hiking Trail, Coldspring, TX 77331, USA
White mold fungus Tilachlidium setigerum(?) parasitising on pinewood gingertail (Xeromphalina campanella) on a pine log in Big Creek Scenic Area of Sam Houston National Forest. Shepherd, Texas, November 27, 2019Lone Star Hiking Trail, Coldspring, TX 77331, USA
Close up of mold fungus Tilachlidium setigerum(?) parasitising on pinewood gingertail (Xeromphalina) in Big Creek Scenic Area of Sam Houston National Forest. Shepherd, Texas, November 27, 2019Lone Star Hiking Trail, Coldspring, TX 77331, USA
Mold-like fungus Tilachlidium setigerum(?) on dried Xeromphalina mushrooms on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, December 2, 2023Little Lake Creek Loop Trail, Montgomery County, Texas, 77873, United States
Conidia and tissues under a microscope with x40 objective of mold-like fungus Tilachlidium setigerum(?) from dried Xeromphalina mushrooms, collected in Sam Houston National Forest near Montgomery. Texas, December 2, 2023
Hyphae and conidia under a microscope with x40 objective of mold-like fungus Tilachlidium setigerum(?) from dried Xeromphalina mushrooms, collected in Sam Houston National Forest near Montgomery. Texas, December 2, 2023
Mold like fungus Tilachlidium setigerum(?) parasitising on gingertail (Xeromphalina campanella) on a pine log on Stubblefield section of Lone Star hiking trail north from Trailhead No. 6 in Sam Houston National Forest. Texas, December 31, 2023Lone Star Hiking Trail, Walker County, Texas, United States
White mold fungus Tilachlidium setigerum(?) parasitising on pinewood gingertail (Xeromphalina campanella) on a pine log on Stubblefield section of Lone Star hiking trail north from Trailhead No. 6 in Sam Houston National Forest. Texas, December 31, 2023Lone Star Hiking Trail, Walker County, Texas, United States
Close up of mold fungus Tilachlidium setigerum(?) parasitising on pinewood gingertail (Xeromphalina) on Stubblefield section of Lone Star hiking trail north from Trailhead No. 6 in Sam Houston National Forest. Texas, December 31, 2023Lone Star Hiking Trail, Walker County, Texas, United States
Tissues of mold fungus Tilachlidium setigerum(?) at low magnification from Xeromphalina collected north from Trailhead No. 6 in Sam Houston National Forest. Texas, December 31, 2023
Tissues and conidia of mold fungus Tilachlidium setigerum(?) from Xeromphalina collected north from Trailhead No. 6 in Sam Houston National Forest. Texas, December 31, 2023
Terminal phialides(?) and conidia of mold fungus Tilachlidium setigerum(?) from Xeromphalina collected north from Trailhead No. 6 in Sam Houston National Forest. Texas, December 31, 2023Tilachlidium setigerum was observed parasitizing on gingertail (Xeromphalina campanella) on pine logs in East and Central Texas, specifically in Sam Houston National Forest. The fungus appeared as a white mold-like growth on the host mushrooms. Observations were made in November 2019 and December 2023, at various locations within the forest, including Big Creek Scenic Area and Stubblefield section of Lone Star hiking trail. Microscopic examination revealed conidia, hyphae, and terminal phialides, confirming the identity of the fungus. The fungus was found on dried Xeromphalina mushrooms and on fresh pinewood gingertail, suggesting a parasitic relationship between Tilachlidium setigerum and its host. The consistent presence of the fungus at different locations and times suggests it may be a common parasite in this region.
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