A fungal structure consisting of jointed or segmented sterigmata (the small projections from which spores are produced).
From Greek 'arthron' (joint) + 'sterigma' (support or prop, from 'sterein' meaning to spread or support). The term describes how these fungal structures are jointed or segmented supports for spore production.
Under a microscope, arthrosterigmata look like tiny articulated arms—fungi use these jointed structures like precise manufacturing tools to produce and deploy spores exactly where needed, showing that even single-celled organisms have sophisticated architecture.
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