Taxonomic studies of the Halosphaeriaceae: Ceriosporopsis, Haligena, and Appendichordella gen.nov.

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Abstract
Five species of Ceriosporopsis and two species of Haligena of the Halosphaeriaceae have been examined histochemically and at the scanning and transmission electron microscope levels, as part of our review of the taxonomy of marine Pyrenomycetes (Ascomycotina). Three species are retained in Ceriosporopsis: C. halima Linder (the type species), C. cambrensis Wilson, and C. tubulifera (Kohlm.) Kirk in Kohlmeyer. The genus is characterised by an outer exosporic sheath through which mucilaginous appendages are released. Great variation exists in the origin of the polar appendages and in the structure of the exosporic sheath. Only one species is retained in the genus Haligena: H. elaterophora Kohlm., while a new genus, Appendichordella, is described for Haligena amicta (Kohlm.) Kohlm. et Kohlm.

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