<em>Colletotrichum dematium</em> is a fungal species belonging to the genus <em>Colletotrichum</em>, a large and economically significant group of plant-pathogenic and endophytic fungi. Members of this genus are known to cause anthracnose diseases on a wide variety of plant hosts globally. <em>Colletotrichum dematium</em> has been documented across multiple continents, with recorded occurrences in Asia, including Taiwan and other regions, Europe, with records from Belgium, Denmark, Norway, and Portugal, and South America, specifically Brazil. This broad distribution reflects the species' ability to associate with diverse plant hosts across temperate and tropical agricultural and natural ecosystems. The species has not been formally evaluated for conservation status. As a fungal organism, it does not exhibit dietary behavior in the traditional sense but obtains nutrients through parasitic or saprotrophic interactions with plant material. Biological traits of this species remain poorly documented in the scientific literature. Its presence across multiple continents and host species makes it a subject of ongoing study in plant pathology.