The Merosporangium

Benjamin, R. K.

doi:10.2307/3756986

Cited by 25 publications

(1 citation statement)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Dimargaritales, Kickxellales, and Zoopagales have changed little in the last 15 years and excellent descriptions of these orders can be found in Benjamin's publications (Benjamin 1958(Benjamin , 1959(Benjamin , 1961(Benjamin , 1963(Benjamin , 1965(Benjamin , 1966(Benjamin , 1979(Benjamin , 1985a. Changes in the classification of Entomophthorales, since the order was reviewed by Benjamin (1979) and Tucker (1981), have resulted in a six-family system (Humber 1989).…”

Section: Taxonomymentioning

confidence: 98%

Classical morphology in zygomycete taxonomy

Benny¹

1995

Can. J. Bot.

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Classification of Zygomycetes has evolved with the description of new taxa and the rediscovery and redescription of known species. Taxonomy of orders in Zygomycetes is based on the morphology of the spore forming structures, sporangia and (or) sporangiola, or merosporangia. Some organisms produce only zygospores, azygospores, chlamydospores, or a combination of these structures. The occurrence and morphology of any of the aforementioned structures and others (e.g., stolons and rhizoids, apophyses, branching pattern, fertile vesicles) are used to ascertain the phylogenetic relationships in Mucorales. Our understanding of the morphology, development, and phylogeny of Zygomycetes has been enhanced by using microscopic observations and cladistic analysis of data sets derived both from small subunit rDNA and morphology. Many morphological characters (e.g., trophocyst, yeast cell formation) still appear to be reliable phylogenetic indicators while others (e.g., spore morphology) are too variable. The value of zygospore morphology is reduced because the sexual spore has never been reported for many taxa. Many characters used to circumscribe rnucoralean families probably do not indicate relationships but still are useful in identification. Sporangiola should be considered indistinct from sporangia.RCsurnC : La classification des zygomycbtes a CvoluC avec la description de nouveaux taxons ainsi que la redkcouverte et la redescription des espbces connues. La taxonomie des ordres chez les zygomycbtes, est baste sur la morphologie des structures formant les spores et (ou) les sporangioles, ou sporanges. Certains organismes produisent seulement des zygospores, des azygospores, ou des chlamydospores, ou une cornbinaison de ces structures. La presence et la morphologie de chacune des structures mentionnCes et d'autres (p. ex., stolons et rhizo'ides, apophyses, patron de ramification, vCsicules fertiles) sont utilisees pour Ctablir les relations phylogCnCtiques chez les mucorales. Notre comprChension de la morphologie, du dCveloppement, et de la phylogCnie des zygomycktes a it6 amCliorCe par l'utilisation des observations microscopiques et l'analyse cladistique des ensembles de donnCes obtenues a la fois de la petite sous-unite du rADN et de la morphologie. Plusieurs caractkres morphologiques (p. ex., trophocyste, formation de cellules levuriformes) apparaissent toujours comme des indicateurs phylogCnCtiques fiables alors que d'autres (p. ex., morphologie sporale) sont trop variables. La validit6 de la morphologie des zygospores est rCduite parce que la spore sexuelle n'a jamais Ct C rapportCe chez plusieurs taxons. Plusieurs caractkres utilists pour circonscrire les familles du mucorales n'indiquent probablernent pas de relations mais demeurent utiles pour l'identification. Les sporangioles devraient Ctre considCrCs comme des formes indistinctes des sporanges.

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