Ascomycetes - Erysiphales, Onygenales, Eurotiales, Ophiostomatales, Laboulbeniales, Dothideales - The Fifth Kingdom

Orders: Erysiphales, Onygenales, Eurotiales,
Ophiostomatales, Laboulbeniales, Dothideales
(45 pictures)

Erysiphales - powdery mildew of Cucurbita
caused by the Oidium anamorph of Erysiphe.

Erysiphales - SEM of conidial chains and mother cells of the
Oidium anamorph of Erysiphe on a host leaf.

Erysiphales - ascomata of Erysiphe on the host.
X 5

Erysiphales - ascoma of Uncinula. Note the
appendages with curled ends (see also below)
(dark field illumination)
X 50

Erysiphales - appendages of Uncinula ascoma
X 400

Erysiphales - ascoma of Uncinula split open to reveal two asci.
X 100

Erysiphales - ascoma of Microsphaera,
with dichotomously branched appendages.
X 60

Erysiphales - dichotomously branched
ascomatal appendage of Microsphaera.
X 200

Erysiphales - leaf of Alnus rugosa with several colonies of Phyllactinia (note ascomata)
X 2

Erysiphales -
ascomata of Phyllactinia at several stages of development
X 70

Erysiphales - mature ascoma of Phyllactinia with bulbous-based, needle-like appendages
X 100

Erysiphales - SEM of mature ascoma of Phyllactinia
X 150

Erysiphales - appendages of Phyllactinia bending downward to release ascoma
X 150

Onygenales - ringworm, a dermatomycosis
(or "tinea") caused by a member of the Arthrodermataceae.

Onygenales - Onygena corvina fruiting on a dead North American robin

Onygenales - cleistothecial ascoma, comb-like appendage, and ascospores of Ctenomyces.

Onygenales - ascoma of Myxotrichum with barb-like appendages.

Onygenales - phragmosporous conidia of Microsporum growing on horse hair.
X 200

Onygenales - stages in conidiogenesis of Microsporum
X 200

Eurotiales - colonies of Aspergillus flavus (yellowish, granular) and Penicillium (grey-green, smooth) anamorphs growing on nutritive agar
X 1

Eurotiales - conidiophores of Aspergillus anamorph
(Nomarski interference contrast)
X 400

Eurotiales - conidiophores of a Penicillium anamorph.
X 400

Eurotiales - section through a cleistothecial ascoma of Eurotium
X 400

Eurotiales - stained globose asci with pulleywheel-shaped ascospores (two flanges are visible on some)
X 1000

Ophiostomatales - beaked ascoma of Ophiostoma olivaceapinii
X 100

Ophiostomatales - ostiolar hyphae at apex of ascomatal neck - hold spore drop in place
X 400

Ophiostomatales - Dutch elm disease, caused by Ophiostoma ulmi, in Nova Scotia.

Ophiostomatales - the synnematal Graphium anamorph of Ophiostoma ulmi fruiting on elm wood.
X 12

Ophiostomatales - one synnematal conidioma of Graphium
X 100

Ophiostomatales - phialides of Chalara anamorph of Ceratocystis
X 400

Laboulbeniales - ascomata on whirligig beetle (Gyrinidae)
X 15

Laboulbeniales - ascomata on gyrinid beetle
X 60

Dothideales - bitunicate asci of Pleospora, containing pigmented, dictyoseptate ascospores.

Dothideales - apple scab caused by the Spilocaea anamorph of Venturia inaequalis.

Dothideales - the Spilocaea pomi anamorph of Venturia inaequalis attacking apple leaves
X 1/2

Dothideales - percurrently extending conidiogenous cells, with three detached conida, of the Spilocaea pomi anamorph of Venturia inaequalis on apple leaf.
X 400

Dothideales - pseudothecial ascoma of Venturia inaequalis in a dead apple leaf
X 50

Dothideales - black knot of wild cherry, caused by Apiosporina morbosa.

Dothideales - section though a stroma of Apiosporina morbosa bearing pseudothecial ascomata
X 50

Dothideales - the Alternaria anamorph of Pleospora. Note the chains of beaked, pigmented dictyosporous conidia.

Dothideales - leaf scorch of horse chestnut (Aesculus) caused by the Phyllosticta anamorph of Guignardia aesculi in Ontario (eastern Canada). This disease appears to be absent from Vancouver Island (western Canada).

Dothideales - Capnodiaceae - a thick coating of sooty moulds blackening the whitish bark of Nothofagus (Southern beech) in New Zealand

Dothideales - Capnodiaceae - feathery black growths of sooty mould
X 1

This is (finally) the end of the Ascomycetes...
Now press on to the Basidiomycetes...(the last major group of independent fungi)