Umbilicaria cylindrica

Ciri dan struktur

Umbilicaria cylindrica has a leaf-like thallus that reaches 2–10 cm in diameter, though most specimens are smaller than 4 cm across. One specimen, originally documented as the variety delisei, was recorded at a diameter of 26 cm. The thallus consists of multiple that may be either smoothly rounded or irregularly jagged, and sometimes contain small holes. The upper surface ranges in colour from dark brown to dark grey or black, and may be covered in places with a grey, powdery coating. Its texture can be smooth or slightly rough with tiny, map-like cracks. Inside, the thallus has a distinctive three-layered medulla: a loosely arranged, web-like () outer layer, a dense central core, and another web-like layer beneath. The internal structure of the thallus contains a distinctive three-layered medulla (inner tissue): an upper web-like layer beneath the , a dense central layer where fungal threads are tightly packed in parallel, and a lower web-like layer connecting to the bottom surface. This "decussata-type" medullary structure is characteristic of the species. This structure allows the thallus to store a moderate amount of water, with approximately 20% of its volume consisting of pore spaces. The reproductive structures (apothecia) are distinctive and numerous, appearing as black, slightly raised discs 0.5–2.0 (rarely up to 4.0) mm in diameter. These structures have a (maze-like) pattern on their surface and are elevated above the thallus on short stalks, with margins that are either smooth or slightly cracked. Early studies of this species' reproductive structures were conducted by Gustav Lindau in the late 19th century, who documented the development of apothecia near the centre of the thallus, a few millimetres inward from the marginal pycnidia.

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

Rujukan: [1]

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

Habitat dan peran ekologis

Umbilicaria cylindrica is an Arctic–alpine lichen found on exposed rocky surfaces in cold, mountainous regions​. It prefers siliceous (acidic) rocks such as granite and basalt, and typically grows in the alpine vegetation zone above treeline. Thalli are usually located on windswept boulders and outcrops with only a brief seasonal snow cover, often near mountaintops. In the Alps, it occurs from subalpine elevations around 1000 m up to the nival zone, with records from as high as 4270 m on the Finsteraarhorn. This lichen tolerates extreme climatic conditions of high UV exposure, frequent freeze-thaw cycles, and desiccation typical of alpine and polar environments. In Greenland, the species shows an unusual altitudinal distribution pattern: while typically found at high elevations elsewhere, it is scarce in continental highlands and lower coastal areas due to the desiccating effects of frequent Foehn winds. However, it persists at higher coastal altitudes up to 1600 m where these warm, dry winds have less impact. Rather than acting as a pioneer species in these locations, it functions more as a specialist coloniser of protected ecological niches. Umbilicaria cylindrica has a circumpolar distribution across the Northern Hemisphere and is widespread in arctic and boreal-alpine regions​.

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

Rujukan: [1]

Habitat atau konteks temuan

Informasi belum tersedia pada sumber rilis ini.

Substrat

Informasi belum tersedia pada sumber rilis ini.

Peran atau konteks

Pembentuk liken

Reproduksi

The reproductive structures (apothecia) are distinctive and numerous, appearing as black, slightly raised discs 0.5–2.0 (rarely up to 4.0) mm in diameter. These structures have a (maze-like) pattern on their surface and are elevated above the thallus on short stalks, with margins that are either smooth or slightly cracked. Early studies of this species' reproductive structures were conducted by Gustav Lindau in the late 19th century, who documented the development of apothecia near the centre of the thallus, a few millimetres inward from the marginal pycnidia. He observed that the initial stages of apothecial development occur below the algal layer, where densely packed hyphae form a coiled structure that later develops upward through the thallus layers.

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

Rujukan: [1]

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.

Melihat dengan konteks

Dokumentasi Umbilicaria cylindrica menurut asosiasi foto pada record takson iNaturalist. Kredit: rainerburkard. Identitas mengikuti sumber; bukan penentuan spesimen independen.

Jenis

Fotografi

Kredit

(c) rainerburkard, some rights reserved (CC BY), uploaded by rainerburkard

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.

Dokumentasi tambahan

Sumber profil

1. [1] Umbilicaria cylindrica — Wikipedia (en)Bagian sumber: Frozen revision 1348860618
   Tanggal penghimpunan sumber: 2026-10-12
   Teks sumber: CC BY-SA4.0 · Wikipedia contributors
2. [2] Catalogue of Life Base2026-09-11 — Umbilicaria cylindricaBagian sumber: ColDP NameUsage.tsv ID 7DGRY; accepted species; source 2073
   Tanggal penghimpunan sumber: 2026-10-12
3. [3] Dokumentasi visual — Umbilicaria cylindricaBagian sumber: Identitas mengikuti sumber dokumentasi; bukan penentuan spesimen independen.
   Tanggal penghimpunan sumber: 2026-10-17
   Media sumber: CC BY 4.0 · (c) rainerburkard, some rights reserved (CC BY), uploaded by rainerburkard
4. [4] Dokumentasi visual — Umbilicaria cylindricaBagian sumber: Identitas mengikuti sumber dokumentasi; bukan penentuan spesimen independen.
   Tanggal penghimpunan sumber: 2026-10-17
   Teks sumber: CC BY 4.0 · (c) rainerburkard, some rights reserved (CC BY), uploaded by rainerburkard