Are Mylia and Trabacellula (Hepaticae) related? Unsuspected links revealed by cell wall morphology, with the transfer of Mylia anomala to a new genus ( Leiomylia J.J. Engel & Braggins) of Jungermanniaceae

Autor: John E. Braggins, John J. Engel
Rok vydání: 2005
Předmět:
Zdroj: TAXON. 54:665-680
ISSN: 1996-8175
0040-0262
DOI: 10.2307/25065423
Popis: Scanning electron micrographs reveal a striking similarity of cell wall characters among Mylia taylorii, M. verrucosa, M. nuda and Trabacellula tumidula. All of these taxa have the presence of irregularly shaped strips and plates of smooth wall material, each separated by grids that interconnect the plates and strips. These species all also share the presence of well-formed perforations positioned over the middle lamella between the walls of adjacent cells. The grids and perforations are discussed and illustrated with SEM images. The studies of the leaf surfaces of Trabacellula and Mylia reveal closer taxonomic affinities of the two genera than heretofore thought, and an alternative classification and a realignment of these genera to reflect this affinity is suggested. Mylia is recognized in an independent family, Myliaceae (Grolle) Schljakov. The study also reveals that Mylia anomula is best retained in Jungermanniaceae, as a new genus, Leiomylia, and placed in its own subfamily within Jungermanniaceae, Leiomylioideae. It is suggested that Trabacellula is appropriately placed in a separate and distinct family, Trabacellulaceae Fulford. Based upon the linkage of surface features and other similarities, the two families are placed in a new suborder, Subord. Myliineae.
Databáze: OpenAIRE
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