01 / Morfologi

Ciri dan struktur

Placynthium glaciale forms a thin, crust-like thallus that clings tightly to its substrate and breaks along fine cracks (). A single patch is rarely wider than about 3.5 cm and averages 0.2 mm thick. The surface is olive-brown and densely studded with minute, cactus-like —technically described as or —that are only 30–150 micrometers (μm) across. Each lobe rises from the crust as a tiny round or finger-shaped projection, giving the lichen a roughened texture under a hand lens. In vertical section the outer skin () is a continuous mosaic () of rounded cells 4–6 μm wide. A bluish marginal growth zone () may be present; it turns mauve in potassium hydroxide solution (KOH) but does not extend beyond the thallus edge. The photosynthetic partner is an unidentified cyanobacterium whose 6–7 μm cells sometimes link into short chains and can be easily dislodged when the thallus is sectioned. The spore-bearing bodies (apothecia) are scattered over the surface as round 0.3–0.8 mm in diameter. Their centers are dark brown to jet black, flat to slightly sunken, and entirely dull. A shiny black rim persists as the apothecia age and may curve inward enough to shade part of the . Microscopic sections show a wall () about 50 μm thick at the sides and up to 90 μm at the base; its inner layers are purplish, grading to blue-black toward the edge, and consist of radiating fungal threads whose end cells can reach 10 μm wide. The spore layer (hymenium) is 65–90 μm tall and carries streaks of deep blue-black pigment that intensify toward the top; it stains blue in iodine before any alkali treatment.

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Rujukan: [1]

Pengukuran mengikuti objek, spesimen atau kultur, dan metode yang disebutkan sumber. Baca uraian asli untuk konteks lengkap.

02 / Kehidupan

Habitat dan peran ekologis

Placynthium glaciale is only known to occur in Alaska, where it has been documented from Glacier Bay National Park, Petersburg Borough, Patterson Glacier, and Muir Glacier. It is one of ten Placynthium species that is found in Alaska.

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Rujukan: [1]

Habitat atau konteks temuan
Informasi belum tersedia pada sumber rilis ini.
Substrat
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Peran atau konteks
Pembentuk liken
Temukan hubungan serupa
03 / Siklus hidup

Reproduksi

The spore-bearing bodies (apothecia) are scattered over the surface as round 0.3–0.8 mm in diameter. Their centers are dark brown to jet black, flat to slightly sunken, and entirely dull. A shiny black rim persists as the apothecia age and may curve inward enough to shade part of the . Microscopic sections show a wall () about 50 μm thick at the sides and up to 90 μm at the base; its inner layers are purplish, grading to blue-black toward the edge, and consist of radiating fungal threads whose end cells can reach 10 μm wide. The spore layer (hymenium) is 65–90 μm tall and carries streaks of deep blue-black pigment that intensify toward the top; it stains blue in iodine before any alkali treatment.

Sebagian uraian ditampilkan dalam bahasa sumber; terjemahannya belum tersedia atau belum lolos pemeriksaan.

Rujukan: [1]

04 / Batas informasi

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.

05 / Dokumentasi

Melihat dengan konteks

Voucher herbarium Placynthium glaciale (04257672), The New York Botanical Garden. Identifikasi mengikuti record spesimen sumber. Foto bahan, kemasan, atau label herbarium sebagaimana tersedia pada record institusi; bukan foto lapangan atau penentuan spesimen independen.

Jenis
Voucher herbarium
Kredit
The New York Botanical Garden
Lisensi
CC BY 4.0
Sumber media
Buka entri sumber

Gambar menunjukkan objek menurut identifikasi sumber, bukan verifikasi independen spesimen oleh Fungi. Tidak ada skala baru yang ditambahkan.

06 / Rujukan

Sumber profil

  1. [1] Placynthium glaciale — Wikipedia (en)Bagian sumber: Frozen revision 1301668018
    Tanggal penghimpunan sumber: 2026-10-12
    Teks sumber: CC BY-SA4.0 · Wikipedia contributors
  2. [2] Catalogue of Life Base2026-09-11 — Placynthium glacialeBagian sumber: ColDP NameUsage.tsv ID 9ZDNH; accepted species; source 2073
    Tanggal penghimpunan sumber: 2026-10-12
  3. [3] Dokumentasi visual — Placynthium glacialeBagian sumber: Individual media record; identification follows the source, not independent determination
    Tanggal penghimpunan sumber: 2026-10-12
    Media sumber: CC BY 4.0 · The New York Botanical Garden

Adaptasi teks: CC BY-SA 4.0. Wikipedia contributors — Placynthium glaciale — Wikipedia (en)

Uraian asli dan riwayat sumber

Riwayat atau halaman sumber

Ringkasan sumber

Placynthium glaciale is a species of saxicolous (rock-dwelling) crustose lichen in the family Placynthiaceae. It is found in various locations in Alaska. Identification of this species rests on the distinctive mosaic of tiny , the persistent glossy black apothecial margin, and the unusually blocky, multi-partitioned ascospores.

Revisi sumber

Morfologi sumber

Placynthium glaciale forms a thin, crust-like thallus that clings tightly to its substrate and breaks along fine cracks (). A single patch is rarely wider than about 3.5 cm and averages 0.2 mm thick. The surface is olive-brown and densely studded with minute, cactus-like —technically described as or —that are only 30–150 micrometers (μm) across. Each lobe rises from the crust as a tiny round or finger-shaped projection, giving the lichen a roughened texture under a hand lens. In vertical section the outer skin () is a continuous mosaic () of rounded cells 4–6 μm wide. A bluish marginal growth zone () may be present; it turns mauve in potassium hydroxide solution (KOH) but does not extend beyond the thallus edge. The photosynthetic partner is an unidentified cyanobacterium whose 6–7 μm cells sometimes link into short chains and can be easily dislodged when the thallus is sectioned. The spore-bearing bodies (apothecia) are scattered over the surface as round 0.3–0.8 mm in diameter. Their centers are dark brown to jet black, flat to slightly sunken, and entirely dull. A shiny black rim persists as the apothecia age and may curve inward enough to shade part of the . Microscopic sections show a wall () about 50 μm thick at the sides and up to 90 μm at the base; its inner layers are purplish, grading to blue-black toward the edge, and consist of radiating fungal threads whose end cells can reach 10 μm wide. The spore layer (hymenium) is 65–90 μm tall and carries streaks of deep blue-black pigment that intensify toward the top; it stains blue in iodine before any alkali treatment.

Revisi sumber

Ekologi sumber

Placynthium glaciale is only known to occur in Alaska, where it has been documented from Glacier Bay National Park, Petersburg Borough, Patterson Glacier, and Muir Glacier. It is one of ten Placynthium species that is found in Alaska.

Revisi sumber

Struktur reproduksi sumber

The spore-bearing bodies (apothecia) are scattered over the surface as round 0.3–0.8 mm in diameter. Their centers are dark brown to jet black, flat to slightly sunken, and entirely dull. A shiny black rim persists as the apothecia age and may curve inward enough to shade part of the . Microscopic sections show a wall () about 50 μm thick at the sides and up to 90 μm at the base; its inner layers are purplish, grading to blue-black toward the edge, and consist of radiating fungal threads whose end cells can reach 10 μm wide. The spore layer (hymenium) is 65–90 μm tall and carries streaks of deep blue-black pigment that intensify toward the top; it stains blue in iodine before any alkali treatment.

Revisi sumber

Rujukan halaman ini

Fungi. Placynthium glaciale. Rilis data fungi-2026-10-12-expansion-2. https://fungi-atlas.mgadib.chatgpt.site/jamur/placynthium-glaciale/.

Status: impor sumber; pemeriksaan editorial per profil belum selesai. Untuk klaim biologis, gunakan rujukan pada bagian terkait dan periksa konteks sumber aslinya.