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Structure and Development of Cleistoiodophanus conglutinatus Gen. & Sp. N. (Ascobolaceae)

Jose L. Bezerra and James W. Kimbrough
American Journal of Botany
Vol. 63, No. 6 (Jul., 1976), pp. 838-844
Stable URL: http://www.jstor.org/stable/2442043
Page Count: 7
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Structure and Development of Cleistoiodophanus conglutinatus Gen. & Sp. N. (Ascobolaceae)
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Abstract

Cleistoiodophanus represents a new coprophilous genus of the tribe Iodophaneae in the Ascobolaceae (Pezizales). The only species thus far discovered, C. conglutinatus, is described and illustrated. Aspects of its cytological development are described from cultures obtained from apothecia found on sheep dung near Gainesville, Florida. Plasmogamy occurs in acogonial coils, two or three cells of which give rise to ascogenous hyphae. Ascogonia are quickly enclosed by vegetative hyphae and the ascocarp continues in a cleistohymenial development. Unlike Iodophanus and related genera, the excipulum remains intact even after spore maturation and the asci push through the epihymenial regions to release spores. The asci are characteristically thickened at their apices, diffusely amyloid, and somewhat saccate. The asci are predominantly 8-spored, but have been found with four or 16 spores per ascus. A previously undescribed Oedocephalum imperfect stage was induced in culture.

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