Xanthoparmelia ovealmbornii

Ciri dan struktur

Xanthoparmelia ovealmbornii is a subfruticose lichen (having a somewhat shrub-like growth form) that grows in a loosely spreading to slightly cushion-like manner, reaching up to 5 cm across. The branches are linear and elongated, sometimes slightly swollen at intervals, and form a tangled mass. These branches range from very thin (0.04 cm) at their tips to rarely exceeding 0.4 cm in width in older sections. While mostly flat to slightly convex, the terminal portions can become almost cylindrical. The upper surface is dark brown to black or grayish-black in color, generally smooth with a dull to slightly shiny appearance. The lower surface ranges from tan to pale brown, occasionally becoming as dark as the upper surface near the branch tips. The lichen lacks both soredia and isidia (structures for vegetative reproduction). Rather than having root-like structures (rhizines), it attaches to its through scattered holdfast structures at the tips of some branches. What makes this species particularly distinctive is its internal structure. While most members of the Parmeliaceae have a soft, loosely woven medulla (inner layer), this species has a uniquely dense, cartilage-like medulla. This tissue consists of fungal threads (hyphae) that are tightly packed and arranged parallel to the length of the branches, embedded in a dense matrix. This unusual anatomy appears to be an adaptation to provide mechanical support. Just below the upper surface lies a relatively thin containing the algal partner of the lichen. The species contains norstictic acid as its main secondary metabolite, with small amounts of stictic acid and connorstictic acids also present.

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Rujukan: [1]

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Habitat dan peran ekologis

Xanthoparmelia ovealmbornii is endemic to South Africa, specifically occurring within the Cape Floristic Region. The species is found at high elevations, growing on sandy rock surfaces at altitudes of 2000 m or higher in mountainous areas. The only confirmed locations are from three collections: at Sonklip Peak (in the Ceres–Worcester district), on the plateau between Sonklip and Matroosberg, and at Toverkop in the Swartberg Mountains near Ladismith, where it was found growing at elevations between 1800 – 2100 m. In these locations, it grows specifically on pebbly, sandy rock surfaces. Due to the limited number of specimens collected, a complete understanding of the species' full distribution range and ecological preferences remains uncertain, though its apparent restriction to the Cape Floristic Region suggests it may be another example of the high plant and lichen endemism characteristic of this biodiversity hotspot.

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Rujukan: [1]

Habitat atau konteks temuan

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Substrat

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Peran atau konteks

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Reproduksi

The upper surface is dark brown to black or grayish-black in color, generally smooth with a dull to slightly shiny appearance. The lower surface ranges from tan to pale brown, occasionally becoming as dark as the upper surface near the branch tips. The lichen lacks both soredia and isidia (structures for vegetative reproduction). Rather than having root-like structures (rhizines), it attaches to its through scattered holdfast structures at the tips of some branches. The species contains norstictic acid as its main secondary metabolite, with small amounts of stictic acid and connorstictic acids also present. When tested with chemical spot tests, the medulla is PD+ (yellow-orange) and K+ (yellow turning to orange-red), and C−.

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

Voucher herbarium Almbornia cafferensis (04534329), 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.

Sumber profil

1. [1] Xanthoparmelia ovealmbornii — Wikipedia (en)Bagian sumber: Frozen revision 1276948394
   Tanggal penghimpunan sumber: 2026-10-12
   Teks sumber: CC BY-SA4.0 · Wikipedia contributors
2. [2] Catalogue of Life Base2026-09-11 — Xanthoparmelia ovealmborniiBagian sumber: ColDP NameUsage.tsv ID 7G6YT; accepted species; source 2073
   Tanggal penghimpunan sumber: 2026-10-12
3. [3] Dokumentasi visual — Almbornia cafferensisBagian 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