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Systematics of Halosarpheia based on morphological and molecular data.
University of Illinois.ORCID iD: 0000-0002-0713-6897
2003 (English)In: Mycologia, ISSN 0027-5514, E-ISSN 1557-2536, Vol. 95, no 3Article in journal (Refereed) Published
Abstract [en]

The genus Halosarpheia (Halosphaeriales) was established for marine ascomycetes with obpyriform to sub-globose, coriaceous, brown to black ostiolate ascomata with long necks; hamathecia of catenophyses; thin-walled, unitunicate, persistent asci with thick-walled apices; and ellipsoid, one septate, hyaline ascospores equipped with coiled, threadlike apical appendages that unfurl in water. Emphasis on ascospore appendage morphology has led to the inclusion in the genus of morphologically disparate fungi from a variety of marine and freshwater habitats. To better understand the evolutionary relationships of Halosarpheia species, phylogenetic analyses were conducted on 16 Halosarpheia species, 13 other species of Halosphaeriales and representatives of the Microascales, Hypocreales, Sordariales and Xylariales using 18S and 28S rDNA sequence data. All of the Halosarpheia species occurred on the Halosphaeriales clade. The type species of the genus, H. fibrosa, occurred on a well-supported clade with two morphologically similar species, H. trullifera and H. unicellularis. This clade, which phylogenetically was distant from the clades of other Halosarpheia species, represents the genus Halosarpheia sensu stricto. The other Halosarpheia species were distributed among eight other well-supported clades clearly separated from one another based on molecular data. New generic names are established for six of these clades, one new species is described, and one species is transferred to Aniptodera. A table (Table I) comparing the morphology, habitat, substrate and distribution of the genera of aquatic ascomycetes with coiled, threadlike apical appendages treated in this study is provided, along with a key for their identification.

Place, publisher, year, edition, pages
2003. Vol. 95, no 3
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Biological Sciences
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URN: urn:nbn:se:uu:diva-277685PubMedID: 21156644OAI: oai:DiVA.org:uu-277685DiVA: diva2:905377
Available from: 2016-02-22 Created: 2016-02-22 Last updated: 2017-11-30

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Anderson, J L

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