Surface ornamentation of ascospores inEupenicillium species
The ascospores of 21 species ofEupenicillium were examined for surface ornamentation by means of the scanning electron microscope. Two groups of species could be distinguished: one with, and another without distinct equatorial ridges. The former group was further subdivided into four types according to wall ornamentation: reticulate, ribbed, spinulose, and smooth.Surface ornamentation details may come to range among the most important features to distinguish species that are hardly discernible otherwise.
Ascospores of some common species of Eurotium (Aspergillus glaucus) as shown by scanning electron microscopy
Micrographs of ascospores of Eurotium amstelodami, E. chevalieri, E. repens, E. rubrum and Aspergillus chevalieri var. intermedins taken with the scanning electron microscope and the phase-contrast light microscope are presented. The shape and surface ornamentation of the ascospores under the light microscope are currently the most important features used to distinguish these closely related fungi. The scanning electron microscope revealed certain features, such as pits or holes on the ascospores of E. chevalieri and protuberances on the ascospores of E. repens , too small to be resolved with the light microscope. It also revealed in much greater detail features, such as the roughness of the ascospore faces of E. chevalieri , that are just discernible with the light microscope.
Studies on the genusEupenicillium ludwig III. Four new species ofEupenicillium
Descriptions with drawings are presented of four new species ofEupenicillium:E. pinetorum sp. n., conidial statePenicillium pinetorum Christensen et Backus;E. katangense sp. n., conidial stateP. katangense st. n.;E. anatolicum sp. n., conidial stateP. anatolicum st. n.;E. abidjanum sp. n., conidial stateP. abidjanum st. n.