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An ascus (from Ancient Greek ἀσκός (askós) 'skin bag, wineskin'; pl.: asci) [1] is the sexual spore-bearing cell produced in ascomycete fungi. Each ascus usually contains eight ascospores (or octad), produced by meiosis followed, in most species, by a mitotic cell division.
There are 2000 identified genera and 30,000 species of Ascomycota. The unifying characteristic among these diverse groups is the presence of a reproductive structure known as the ascus, though in some cases it has a reduced role in the life cycle. Many ascomycetes are of commercial importance.
The Annulatascaceae are a family of fungi in the monotypic order Annulatascales of the class Sordariomycetes of the Ascomycota. [1] The family had not been assigned to any order, [2] until 2020 when it was placed with a new order Annulatascales M.J. D'souza, Maharachch.
As of 2015, there were 26 known marine Verrucariaceae, distributed amongst the genera Hydropunctaria (6 species), Mastodia (1 sp.), Verrucaria (16 spp.), and Wahlenbergiella (3 spp.). [60] Several of these marine lichens have been investigated preliminarily to determine their suitability for use as bioindicators of coastal water pollution .
The Cordycipitaceae are a family of parasitic fungi in the Ascomycota, class Sordariomycetes and order Hypocreales.The family was first published in 1969 by mycologist Hanns Kreisel, [1] but the naming was invalid according to the code of International Code of Nomenclature for algae, fungi, and plants.
JetPunk is an online trivia and quizzing website. The service offers a variety of quizzes in different topics, such as geography, history, science, literature, and music. [2] [3] The site offers quizzes in a variety of languages, including but not limited to: English, French, Spanish, Dutch, Italian, German, Finnish, Portuguese, and Polish. [4]
The black stork (Ciconia nigra) is a large bird in the stork family Ciconiidae. It was first described by Carl Linnaeus in the 10th edition of his Systema Naturae.Measuring on average 95 to 100 cm (37 to 39 in) from beak tip to end of tail with a 145-to-155 cm (57-to-61 in) wingspan, the adult black stork has mainly black plumage, with white underparts, long red legs and a long pointed red beak.
The ascus itself forms as a radiating spur branch at the top of the hook. Each nucleus divides, resulting in the formation of a pair of compatible nuclei, i.e. a dikaryon, in the ascus, which is now the penultimate space. Two sister nuclei remain, one in the basal cell and the other in the crozier tip.