Final answer:
Cladosporium trichoides and Cladosporium carrionii can be differentiated by several testable laboratory characteristics, but not by a predilection for neural tissues, as this relates more to clinical pathogenicity rather than to taxonomy.
Step-by-step explanation:
Out of the options provided, Cladosporium trichoides and Cladosporium carrionii can be speciated by all except the claim that C. trichoides has a predilection for neural tissues; C. carrionii does not. This is because speciating fungi typically involves observable and testable characteristics such as temperature growth range, presence of specific structures like sclerotic bodies or blastoconidia, and comparative growth rates, rather than preferences for infecting specific body tissues, which is more related to the clinical manifestations and pathogenicity of the organism rather than its taxonomy.
Both C. trichoides and C. carrionii may produce similar structures and have similar cultural characteristics. However, only C. trichoides is known to grow at 42 degrees C, does not produce sclerotic bodies, has distinct blastoconidia size, and exhibits a rapid growth rate compared to C. carrionii. These differences are testable in a laboratory setting and are used to differentiate between the species.