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Opisthokont characteristics include synthesis of extracellular chitin in exoskeleton, cyst/spore wall, or cell wall of filamentous growth and hyphae; the extracellular digestion of substrates with osmotrophic absorption of nutrients; and other cell biosynthetic and metabolic pathways.
Holozoa, along with a clade that contains fungi and their protist relatives , are part of the larger supergroup of eukaryotes known as Opisthokonta. Holozoa diverged from their opisthokont ancestor around 1070 million years ago (Mya). [16] The choanoflagellates, animals and filastereans group together as the clade Filozoa.
Amoebidiidae is a family of single-celled eukaryotes, previously thought to be zygomycete fungi belonging to the class Trichomycetes, but molecular phylogenetic analyses [1] [2] [3] place the family with the opisthokont group Mesomycetozoea [4] (= Ichthyosporea [5]).
On Eukaryota tree, in Opisthokont clade, Mesomycetozoea is in the middle ("Meso-") of the fungi ("-myceto-") and the animals ("-zoea"). [6] The name Mesomycetozoa (without a third e) is also used to refer to this group, but Mendoza et al. use it as an alternate name for basal Opisthokonts.
The name "Choanozoa" was first used by protozoologist Thomas Cavalier-Smith in 1991 to refer to a group of basal protists that later proved not to form a clade. This group had the rank of phylum and contained all opisthokont protists while excluding both fungi and animals, making the group paraphyletic. Its classification was the following: [7]
Amorphea [1] is a taxonomic supergroup that includes the basal Amoebozoa and Obazoa.That latter contains the Opisthokonta, which includes the Fungi, Animals and the Choanomonada, or Choanoflagellates.
Opisthokont stubs (2 C, 3 P) T. Opisthokont taxa (5 C) Pages in category "Opisthokonts" This category contains only the following page. This list may not reflect ...
Holomycota or Nucletmycea are a basal Opisthokont clade as sister of the Holozoa.It consists of the Cristidiscoidea and the kingdom Fungi.The position of nucleariids, unicellular free-living phagotrophic amoebae, [3] as the earliest lineage of Holomycota suggests that animals and fungi independently acquired complex multicellularity from a common unicellular ancestor and that the osmotrophic ...