Ciri dan struktur
Macroscopically, the lichenised thallus forms a fragile, green to bluish‑green mat of loosely interwoven fungal‑cyanobacterial fibrils on the bark of Cryptomeria japonica. In microscopic section the thallus is up to 80 micrometres (μm) thick, with occasional tufts of compact fibrils projecting to roughly 300 μm. Each Rhizonema filament (about 2.7–3.5 μm diam.) is only partly ensheathed by hyphae, leaving visible interspaces. Under the light microscope and in TEM micrographs, tubular haustoria (about 2.5–3.4 μm diam.) are seen entering the trichome and running through consecutive cells, a feature otherwise associated with the related genus Dictyonema. The basidiomata develop on the wood surface adjacent to the thallus, especially along the margins or on the underside of overhanging bark. They are paper‑thin, membranous and white, rarely exceeding a few millimetres across. The hymenium is ≤ 40 μm thick and composed of hyaline, thin‑walled hyphae 3–4 μm wide; clamp connections and cystidia are absent. Basidia are short‑clavate, 8.6–13.0 × 5.4–6.5 μm, bearing four sterigmata 2.2–3.6 μm long. Basidiospores are ellipsoid to slightly elongate, 5.3–6.3 × 3.4–4.0 μm, smooth, thin‑walled and non‑amyloid. When grown axenically on potato dextrose agar at 20 °C the forms slow‑growing, pale pink to pale brown colonies reaching 4.0–4.5 mm diameter after two months.
Habitat dan peran ekologis
As of its original publication, Cyphellostereum ushima was known to occur only in the type locality, a low‑elevation (15 m) coastal forest in Setouchi town, Amami Ōshima, Kagoshima Prefecture. The climate there is warm and humid year‑round, supporting subtropical evergreen broad‑leaved vegetation in which Cryptomeria japonica plantations are common. The lichen grows epiphytically on the shaded, occasionally rain‑washed trunks and branches of this conifer, where mesic conditions favour cyanobacterial partners. Field observations indicate that the species is locally rare but may be overlooked because its inconspicuous thallus blends into algal films and bryophyte patches, while its basidiomata are minute and transient.
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Reproduksi
The basidiomata develop on the wood surface adjacent to the thallus, especially along the margins or on the underside of overhanging bark. They are paper‑thin, membranous and white, rarely exceeding a few millimetres across. The hymenium is ≤ 40 μm thick and composed of hyaline, thin‑walled hyphae 3–4 μm wide; clamp connections and cystidia are absent. Basidia are short‑clavate, 8.6–13.0 × 5.4–6.5 μm, bearing four sterigmata 2.2–3.6 μm long. Basidiospores are ellipsoid to slightly elongate, 5.3–6.3 × 3.4–4.0 μm, smooth, thin‑walled and non‑amyloid. When grown axenically on potato dextrose agar at 20 °C the forms slow‑growing, pale pink to pale brown colonies reaching 4.0–4.5 mm diameter after two months.
Catatan identitas dan cakupan
- Nama diterima mengikuti Catalogue of Life Base2026-09-11; uraian mempertahankan konsep dan nama sumber aslinya.
- Original geographic, specimen and life-cycle scope retained; source import awaits individual editorial review.
- Impor dan terjemahan otomatis belum diperiksa editorial per profil. Struktur reproduktif yang disebutkan tidak membuktikan seluruh siklus hidup diketahui.
- Pengukuran pada uraian mengikuti spesimen, kultur, dan metode sumber; angka tidak diperluas ke semua populasi.
Catatan distribusi dalam narasi mengikuti sumbernya. Dokumentasi spesimen atau foto mengikuti catatan sumber. Bukti wilayah Indonesia dan penilaian konservasi tidak disimpulkan dari gambar.
Melihat dengan konteks
Dokumentasi Cyphellostereum ushimanum dari Wikimedia Commons. The cyanobacterial lichen Cyphellostereum ushima , showing its Resupinate basidiomata (white arrows) and fibrous lichenized thallus Identifikasi mengikuti record berkas sumber.
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- Unknown author Unknown author
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Sumber profil
- [1] Cyphellostereum ushimanum — Wikipedia (en)
- [2] Catalogue of Life Base2026-09-11 — Cyphellostereum ushimanum
- [3] Dokumentasi visual — Cyphellostereum ushimanum
Rujukan halaman ini
Fungi. Cyphellostereum ushimanum. Rilis data fungi-2026-10-12-expansion-2. https://fungi-atlas.mgadib.chatgpt.site/jamur/cyphellostereum-ushimanum/.
Status: impor sumber; pemeriksaan editorial per profil belum selesai. Untuk klaim biologis, gunakan rujukan pada bagian terkait dan periksa konteks sumber aslinya.
