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Auriculora byssomorpha , a Tropical Lichen with a Remarkable Developmental Morphology *
Author(s) -
Henssen A.,
Titze A.
Publication year - 1990
Publication title -
botanica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.871
H-Index - 87
eISSN - 1438-8677
pISSN - 0932-8629
DOI - 10.1111/j.1438-8677.1990.tb00138.x
Subject(s) - ascocarp , hymenium , thallus , biology , lichen , stipule , morphology (biology) , botany , anatomy , genus , taxonomy (biology) , zoology
The thallus, pycnidia, and the structure and ontogeny of the ascocarp in Auriculora byssomorpha are described and illustrated. The ontogeny of the apothecia is characterized by the repeated formation of new hymenia within the subhymenial layer. The development of the first hymenium is gymnocarpous but the de novo differentiation of new hymenia, each beneath the next older disintegrating one, gives rise to a peculiar type of secondary hemiangiocarpy. Portions of the decaying hymenia and adjacent subhymenial tissue frequently remain fastened to the apothecial margin and disc in the shape of ear‐like appendages or as superimposed layers. In aged apothecia such decaying tissue may form a sheath around the apothecial margin and on the disc. The systematic position of the genus is briefly discussed.