Details of thin yellow crust of corticioid fungus Hypoxylon rubiginosum around tunnels of bark beetles on an elm log in wet area on Caney Creek Trail (Little Lake Creek Loop Trail) in Sam Houston National Forest north from Montgomery. Texas

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Sam Houston Forest, Texas, April 16, 2023

Album 3386: Sam Houston Forest, Texas, April 16, 2023

The image shows a close-up view of a corticioid fungus growing on an elm log. The yellow crust is likely Hypoxylon rubiginosum, which is commonly found associated with bark beetle tunnels.

In the image, there are several areas where the yellow crust has formed around the tunnels created by the beetles. The crust appears to be slightly raised and irregularly shaped, suggesting that it may have grown out from the surface of the log.

The background of the image shows the dark brown color of the elm log, with some lighter-colored areas where the bark has been damaged or removed by the beetles. There are also some small pieces of debris scattered around the area, possibly including bits of bark or leaves.

Overall, the image suggests that Hypoxylon rubiginosum is a common fungus found in association with bark beetle tunnels on elm logs. It may play an important role in breaking down dead wood and recycling nutrients back into the ecosystem. – AI vision

🇪🇸 Descripción en español / Spanish Description

Los detalles de la corteza amarilla delgada del hongo corticioide Hypoxylon rubiginosum alrededor de los túneles de los escarabajos de la corteza en un tronco de olmo en una zona húmeda del Sendero Caney Creek (Sendero Little Lake Creek Loop) en el Bosque Nacional Sam Houston al norte de Montgomery, Texas, el 16 de abril de 2023. La imagen muestra una vista detallada de un hongo corticioide que crece en un tronco de olmo. Es probable que la costra amarilla sea Hypoxylon rubiginosum, que se encuentra comúnmente asociado con túneles de escarabajos de la corteza. En la imagen, hay varias áreas donde la costra amarilla se ha formado alrededor de los túneles creados por los escarabajos. La costra parece estar ligeramente elevada y de forma irregular, lo que sugiere que puede haber crecido desde la superficie del tronco. El fondo de la imagen muestra el color marrón oscuro del tronco de olmo, con algunas áreas de color más claro donde la corteza ha sido dañada o extraída por los escarabajos. También hay pequeños fragmentos de escombros dispersos por la zona, posiblemente incluyendo pedazos de corteza o hojas. En general, la imagen sugiere que Hypoxylon rubiginosum es un hongo común asociado con túneles de escarabajos de la corteza en troncos de olmo. Puede desempeñar un papel importante al descomponer la madera muerta y reciclar nutrientes de nuevo al ecosistema. – Spanish translation

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