Synonyms: Irpex robustior, Irpex robustius, Mycoleptodon robustior, Mycoleptodon robustius.
Steccherinum robustius is a species of tooth fungus that grows on deciduous trees, particularly oak and elm. In East and Central Texas, it typically fruits in the fall, producing corky to leathery, grayish-brown to brown caps with spines or teeth on the underside. The fungus can be found on stumps, logs, and living tree trunks, often in shaded, moist areas. It is a relatively common species in the region, particularly in wooded areas along streams and rivers.
Orange hydnoid fungus Steccherinum robustius in Hensel Park. College Station, Texas, December 9, 2017
Fibrous hydnoid fungus Steccherinum robustius in Hensel Park. College Station, Texas, December 9, 2017
Orange hydnoid fungus Steccherinum robustius with moss in Hensel Park. College Station, Texas, December 9, 2017
Orange hydnoid fungus Steccherinum robustius on rotting oak in Hensel Park. College Station, Texas, December 9, 2017
Orange hydnoid fungus Steccherinum robustius on rotting wood in Hensel Park. College Station, Texas, December 9, 2017
Orange hydnoid fungus Steccherinum robustius with white margin in Hensel Park. College Station, Texas, December 9, 2017
Orange hydnoid fungus Steccherinum robustius and green moss in Hensel Park. College Station, Texas, December 9, 2017
Fresh white hydnoid fungus Steccherinum robustius in Hensel Park. College Station, Texas, December 9, 2017
Fibrous structure of hydnoid fungus Steccherinum robustius in Hensel Park. College Station, Texas, December 9, 2017
Spreading fibrous hydnoid fungus Steccherinum robustius in Hensel Park. College Station, Texas, December 9, 2017
Fibrous texture of hydnoid fungus Steccherinum robustius in Hensel Park. College Station, Texas, December 9, 2017
Brown hydnoid fungus Steccherinum robustius decomposing solid wood into soft white matter in Hensel Park. College Station, Texas, December 9, 2017
Patches of brown hydnoid fungus Steccherinum robustius on fallen oak branch in Hensel Park. College Station, Texas, December 9, 2017
Brown tooth fungus Steccherinum robustius on oak wood in Hensel Park. College Station, Texas, December 9, 2017
Emerging hydnoid (tooth) mushroom (Steccherinum robustius) on a fallen oak branch in Hensel Park. College Station, Texas, April 4, 2018
Spreading tooth mushroom (Steccherinum robustius) in Hensel Park. College Station, Texas, April 4, 2018
Spreading tooth mushroom (Steccherinum robustius) on a fallen tree branch in Hensel Park. College Station, Texas, April 4, 2018
Close up of spreading tooth mushroom (Steccherinum robustius) in Hensel Park. College Station, Texas, April 4, 2018
Crust of spreading tooth mushroom (Steccherinum robustius) on a fallen oak branch in Hensel Park. College Station, Texas, April 4, 2018
Brown crust Hydnaceae fungus Steccherinum robustius with Annulohypoxilon mushrooms on a fallen oak branch on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest near Huntsville, Texas, April 22, 2018
Fallen oak branch covered by crust-like Hydnaceae fungus Steccherinum robustius on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest near Huntsville, Texas, April 22, 2018
Hydnoid resupinate mushroom Steccherinum robustius on a fallen oak branch in Lick Creek Park. College Station, Texas, January 22, 2019
Frost pattern of corticioid fungus Steccherinum robustius on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, September 29, 2019
Corticioid fungus Steccherinum robustius on a log on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, September 29, 2019
Corticioid fungus Steccherinum robustius(?) on a thin fallen tree on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, September 29, 2019
Orange hydnoid crust fungus Steccherinum robustius on a fallen oak branch on Winters Bayou Trail in Sam Houston National Forest. Cleveland, Texas, November 24, 2019
Hydnoid crust fungus Steccherinum robustius on a fallen tree branch on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, December 15, 2019
Patches of hydnoid crust fungus Steccherinum robustius on a fallen tree branch on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, December 15, 2019
Orange texture of hydnoid crust fungus Steccherinum robustius on a fallen tree branch on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest north from Montgomery. Texas, December 15, 2019
Close-up of ochre spreading tooth mushroom Steccherinum robustius on a fallen twig on Lone Star Hiking Trail near Pole Creek in Sam Houston National Forest. Richards, Texas, March 22, 2020
Texture of ochre spreading tooth mushroom Steccherinum robustius on a fallen twig on Lone Star Hiking Trail near Pole Creek in Sam Houston National Forest. Richards, Texas, March 22, 2020
Ochre spreading tooth mushroom Steccherinum robustius on a fallen twig on Lone Star Hiking Trail near Pole Creek in Sam Houston National Forest. Richards, Texas, March 22, 2020
Pattern of ochre spreading tooth mushroom Steccherinum robustius on a fallen twig on Lone Star Hiking Trail near Pole Creek in Sam Houston National Forest. Richards, Texas, March 22, 2020
Ochre spreading tooth fungus Steccherinum robustius on a fallen twig on Lone Star Hiking Trail near Pole Creek in Sam Houston National Forest. Richards, Texas, March 22, 2020
Corticioid fungus Steccherinum robustius on a fallen oak branch on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, September 19, 2020
Corticioid fungus Steccherinum robustius on a fallen tree branch on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, September 19, 2020
Texture of corticioid fungus Steccherinum robustius on a fallen tree branch on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, September 19, 2020
Side view of corticioid fungus Steccherinum robustius on a fallen tree branch on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, September 19, 2020
Crust mushroom Steccherinum robustius on a fallen oak branch on North Wilderness Trail of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, January 13, 2021
Margin of crust fungus Steccherinum robustius on a fallen oak branch on North Wilderness Trail of Little Lake Creek Wilderness in Sam Houston National Forest north from Montgomery. Texas, January 13, 2021
Orange-toothed crust fungus Steccherinum robustius on a fallen tree on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, January 12, 2022
Orange-toothed crust fungus Steccherinum robustius covering a thin fallen tree on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, January 12, 2022
Orange-toothed crust fungus Steccherinum robustius on a fallen branch on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, April 16, 2022
Orange-toothed crust fungus Steccherinum robustius and a lichen on a fallen tree branch on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, April 16, 2022
Corticioid fungus Steccherinum robustius on a fallen oak branch on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, September 14, 2022
Corticioid fungus Steccherinum robustius with white margins on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, September 14, 2022
Corticioid fungus Steccherinum robustius on oak bark on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas, September 14, 2022
Mature hydnoid corticioid fungus Steccherinum robustius on a hardwood log in Lick Creek Park. College Station, Texas, December 20, 2023
Corticioid fungus Steccherinum robustius on an oak(?) log in Lick Creek Park. College Station, Texas, December 20, 2023
Spores of tooth mushroom Steccherinum robustius collected a day before in Lick Creek Park. College Station, Texas, December 21, 2023
Spore size 4.5 - 4.79 × 2.5 - 2.7 µm, length to width ratio Q = 1.7 - 1.9.
Resupinate tooth mushroom Steccherinum robustius on a log in Lick Creek Park. College Station, Texas, May 4, 2024
Patch of resupinate tooth mushroom Steccherinum robustius on a log in Lick Creek Park. College Station, Texas, May 4, 2024The observations document the presence of Steccherinum robustius, a corticioid fungus, in various locations in Texas, primarily in Sam Houston National Forest and Lick Creek Park. The fungus was found on fallen trees, branches, and logs, often with a crust-like appearance and orange-toothed margins. Observations were made over several years, from 2017 to 2024, during different seasons. The fungus was typically found on hardwoods, such as oak. Some observations noted the presence of lichens or other fungi nearby. Spores were collected and examined in one instance. The observations suggest that Steccherinum robustius is a common species in the region, with a wide distribution and ability to grow on various substrates. The documentation provides valuable information on the habitat, growth patterns, and seasonal variability of this fungus species.
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