Samiksha Jaiswal (Editor)

Stemonitis axifera

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Infraphylum  Mycetozoa
Order  Stemonitida
Genus  Stemonitis
Class  Myxogastrian
Family  Stemonitidae
Rank  species
Stemonitis axifera 341275.jpg
Similar  Stemonitis, Stemonitis fusca, Stemonitidaceae, Stemonitopsis, Arcyria

Stemonitis axifera 3 d


Stemonitis axifera is a species of slime mold. It fruits in clusters on dead wood, and has distinctive tall reddish-brown sporangia, supported on slender stalks.

Contents

Stemonitis axifera Stemonitis axifera Slime mould Steve Axford Flickr

Stemonitis axifera fungi kingdom


Taxonomy

Stemonitis axifera Stemonitis axifera 3 a photo on Flickriver

The species was first described as Trichia axifera by Jean Baptiste François Pierre Bulliard in 1791. Thomas Huston MacBride transferred it to the genus Stemonitis in 1889. Stemonitis fasciculata and Stemonitis smithii are Synonyms.

Description

Stemonitis axifera axifera

The erect, stalked cylindrical sporangia are arranged into bundles or clusters that are 7–15 mm (0.3–0.6 in) tall. Each sporangia are supported by a thin, shining, black stalk that is 3–7 mm (0.1–0.3 in) long. The bright rusty brown color of mature sporangia lightens to a pale brown after the Spores have been dispersed. Spores measure 5 by 7 µm and have a smooth to minutely punctate surface texture.

Development

Stemonitis axifera axifera

Stemonitis axifera requires about 20 hours to finish making its fruit bodies. Of this, eight hours are needed for induction of the sporangia and the development of the stalk and the columella, six hours more for the sporocarps to produce pigment and mature, and an additional six until the spores are discharged.

Ecology and distribution

Stemonitis axifera Stemonitis axifera Wikipedia

The slime mold grows on decaying wood. When the fruit bodies consist of milky white sporangia, they are a favoured food source for Philomycus slugs (mantleslugs), such as P. carolinianus and P. flexuolaris. The slugs emerge at night from under flaps of bark and migrate to more exposed area at the top of wet logs, bypassing more mature, pigmented fruit bodies for the younger white ones. The slugs eat the sporangia stalks from the top down. The feeding preference of Philomycus slugs for immature white sporangia is not seen in other slug species.

Stemonitis axifera Stemonitis axifera Bull T Macbr Discover Life

References

Stemonitis axifera Wikipedia


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