New Species in Endogone (Endogonales)

Yao, Y. J.; Pegler, D.N.; Young, Tom

doi:10.2307/4110642

Cited by 6 publications

(7 citation statements)

References 3 publications

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“…In two of the fossils, the gametangia differ from each other in size, and thus are termed macro- and microgametangium. The condition seen in the fossils closely corresponds to that in certain modern representatives of the Endogonaceae (see Bucholtz 1912, Thaxter 1922, Yao et al 1996). Moreover, it has been observed that in certain Endogonaceae the gametangium walls increase in thickness after gametangial fusion, and thus may remain intact even until zygosporangium maturation (e.g., Bucholtz 1912: 162).…”

Section: Fossils Interpreted As or Compared To Zygomycetous Fungisupporting

confidence: 68%

“…1f–h): The open ends would correspond to the attachment sites of the gametangia to the subtending suspensors, which do not have secondarily thickened walls, and thus rapidly disintegrate following maturation of the zygosporangium and zygospore. Adding support to this interpretation is the fact that the configuration exhibited by these fossils is virtually identical to that seen in several of the zygosporangia with attached paired gametangia of extant Endogone species (e.g., Yao et al 1996: pl. 4, f. 30, Błaszkowski et al 1998: f. 5, 2004: f. 8).…”

Section: Fossils Interpreted As or Compared To Zygomycetous Fungimentioning

confidence: 71%

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Fossil evidence of the zygomycetous fungi

Krings¹,

Taylor²,

Dotzler³

2013

Pers - Int Mycol J

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Molecular clock data indicate that the first zygomycetous fungi occurred on Earth during the Precambrian, however, fossil evidence of these organisms has been slow to accumulate. In this paper, the fossil record of the zygomycetous fungi is compiled, with a focus on structurally preserved Carboniferous and Triassic fossils interpreted as zygosporangium-gametangia complexes and resembling those of modern Endogonales. Enigmatic microfossils from the Precambrian to Cenozoic that have variously been interpreted as, or compared to, zygomycetous fungi are also discussed. Among these, the spherical structures collectively termed ‘sporocarps’ are especially interesting because of their complex investments and abundance in certain Carboniferous and Triassic rocks. Circumstantial evidence suggests that at least some ‘sporocarp’ types represent mantled zygosporangia. Zygomycetous fungi probably were an important element in terrestrial paleoecosystems at least by the Carboniferous.

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Section: Fossils Interpreted As or Compared To Zygomycetous Fungisupporting

confidence: 68%

Section: Fossils Interpreted As or Compared To Zygomycetous Fungimentioning

confidence: 71%

Fossil evidence of the zygomycetous fungi

Krings¹,

Taylor²,

Dotzler³

2013

Pers - Int Mycol J

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“…However, modern Sclerocystis forms spores in sporocarps bounded by a massive peridium (Yao et al . 1996). The absence of a peridium argues against affinities of the fossil to Sclerocystis .…”

Section: Mutualistic Fungal Interactions (Mycorrhizas)mentioning

confidence: 99%

Structurally preserved fungi from Antarctica: diversity and interactions in late Palaeozoic and Mesozoic polar forest ecosystems

et al. 2016

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Chert and silicified wood from the Permian through Cretaceous of Antarctica contain abundant information on fungal diversity and plant-fungal interactions. The chert deposits represent a particularly interesting setting for the study of plant-fungal interactions because they preserve remains of distinctive high latitude forest ecosystems with polar light regimes that underwent a profound climate change from icehouse to greenhouse conditions. Moreover, some of the cherts and wood show the predominance of extinct groups of seed plants (e.g. Glossopteridales, Corystospermales). Over the past 30 years, documentation of fossil fungi from Antarctica has shifted from a by-product of plant descriptive studies to a focused research effort. This paper critically reviews the published record of fungi and fungal associations and interactions in the late Palaeozoic and Mesozoic cherts and silicified wood from Antarctica; certain fungal palynomorphs and fungal remains associated with adpression fossils and cuticles are also considered. Evidence of mutualistic (mycorrhizal), parasitic and saprotrophic fungi associated with plant roots, stems, leaves and reproductive organs is presented, together with fungi occurring within the peat matrix and animal-fungus interactions. Special attention is paid to the morphology of the fungi, their systematic position and features that can be used to infer fungal nutritional modes.

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“…If the configuration exhibited by H. taylorii in fact corresponds to that seen in Endogone, then the subtending structure in the fossil represents a very large macrogametangium, or the macrogametangium plus the macrosuspensor (with the septum between the two structures not preserved or not recognizable). Arguing against affinities of H. taylorii with the Endogonaceae is perhaps the fact that the majority of extant Endogonaceae produce zygosporangia clustered in unstructured masses or in structured sporocarps (Yao et al 1996). There is, however, one genus in the Endogonaceae-that is, Peridiospora CG Wu et Suh J Lin-for which the production of unisporic zygosporocarps is characteristic (Wu and Lin 1997).…”

Section: Position O/^halifaxia Tayiorii Within the Zygomycetous Fungimentioning

confidence: 97%

A Putative Zygomycetous Fungus with Mantled Zygosporangia and Apposed Gametangia from the Lower Coal Measures (Carboniferous) of Great Britain

Krings

White²,

Dotzler

et al. 2013

International Journal of Plant Sciences

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Several specimens of a new fungal reproductive unit, Halifaxia taylorii nov. gen. et spec, occur within the tracheids of a structurally preserved fern axis from the Lower Pennsylvanian of Great Britain. The reproductive units, which appear to be lateral outgrowths of tubular hyphae, consist of a mantled sphere (80-90 ¡xm in diameter) borne terminally on an inflated subtending structure, which may also be mantled. A smaller element clasps the proximal portion of the subtending structure; one arm of this element extends further up along and appears to eventually fuse laterally with the subtending structure. The reproductive units are interpreted as zygosporangium-apposed gametangia complexes of a zygomycetous fungus. Although several structural features of H. taylorii resemble features seen in the zygosporangium-gametangia complexes of certain modern zygomycetes, the precise systematic affinities of the fossils remain unresolved. Nevertheless, the discovery is important because it provides new information on the morphology and evolutionary history of the zygomycetous fungi, which are poorly resolved on the basis of fossils.

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New Species in Endogone (Endogonales)

Cited by 6 publications

References 3 publications

Fossil evidence of the zygomycetous fungi

Fossil evidence of the zygomycetous fungi

Structurally preserved fungi from Antarctica: diversity and interactions in late Palaeozoic and Mesozoic polar forest ecosystems

A Putative Zygomycetous Fungus with Mantled Zygosporangia and Apposed Gametangia from the Lower Coal Measures (Carboniferous) of Great Britain

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