(In a previous contribution (Roberts, 1993), T. allantospora was characterized by its clamped hyphae and weakly allantoid spores, tapered towards the apiculus and averaging 6.5-9.0 (-10.0) x 2.5-3.0 µm. However, examination of the type of T. curvispora Donk (see below) together with Danish specimens under that name (cited above) has necessitated a re-examination of the holotype of T. allantospora to clarify the distinctions, if any, between the two species. This re-examination shows the spores of T. allantospora to be more varied than previously indicated, a search through several mounts revealing a number of distinctly allantoid or angled spores in addition to those which are weakly allantoid or ventrally depressed (Fig. 18). The size range is approx. 7.0-9.5 x 2.5-3.0(-3.5) µm. The spore morphology of T. allantospora is thus identical to that of T. curvispora (Fig. 19), leaving spore size as the only criterion for differentiating the two species. However, some collections appear intermediate. Raunkiaer 618, for example, contains spores of very variable length, 7.0-14.0 x 2.5(-3.0) µm. Since many of these spores are under 9.0 µm long and all are rather narrow, this specimen is tentatively reassigned to T. allantospora, but the distinction is hardly satisfactory. The collections currently assigned to T. allantospora and T. curvispora quite possibly represent a single, variable species or a complex of two or more closely related taxa.) In a previous contribution (Roberts, 1993), T. allantospora was characterized by its clamped hyphae and weakly allantoid spores, tapered towards the apiculus and averaging 6.5-9.0 (-10.0) x 2.5-3.0 µm. However, examination of the type of T. curvispora Donk (see below) together with Danish specimens under that name (cited above) has necessitated a re-examination of the holotype of T. allantospora to clarify the distinctions, if any, between the two species. This re-examination shows the spores of T. allantospora to be more varied than previously indicated, a search through several mounts revealing a number of distinctly allantoid or angled spores in addition to those which are weakly allantoid or ventrally depressed (Fig. 18). The size range is approx. 7.0-9.5 x 2.5-3.0(-3.5) µm. The spore morphology of T. allantospora is thus identical to that of T. curvispora (Fig. 19), leaving spore size as the only criterion for differentiating the two species. However, some collections appear intermediate. Raunkiaer 618, for example, contains spores of very variable length, 7.0-14.0 x 2.5(-3.0) µm. Since many of these spores are under 9.0 µm long and all are rather narrow, this specimen is tentatively reassigned to T. allantospora, but the distinction is hardly satisfactory. The collections currently assigned to T. allantospora and T. curvispora quite possibly represent a single, variable species or a complex of two or more closely related taxa.
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