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Cladosporium cladosporioides

Cladosporium cladosporioides showing branching chains of single-celled conidia (ameroconidia) produced in an acropetal manner from simple erect, pigmented conidiophores.  The term blastocatenate is often used to describe chains of conidia where the youngest conidium is at the apical or distal end of the chain.  Conidia are pale brown to dark brown and have a distinct dark hilum.  Note the conidia closest to the conidiophore, and where the chains branch, are usually "shield-shaped".  The presence of shield-shaped conidia, a distinct hilum, and chains of conidia that readily disarticulate, are diagnostic for the genus Cladosporium.