Rhizoplaca ouimetensis

Ciri dan struktur

Rhizoplaca ouimetensis has a crustose thallus that is made up of (small, angular sections) that can spread irregularly to cover diameters of several centimetres. Each areole can measure up to 2 mm in diameter and may be rounded or slightly irregular in shape. These areoles are typically convex to (blister-like) or (cushion-shaped), occasionally presenting a minutely shield-like () appearance. Their colouration is a greenish yellow with a glossy finish, and their surface is smooth without any powdery () covering. Soralia, structures that produce reproductive powdery called , are bright yellow and emerge from the areoles' surface. They can be individual or partially merged. The soredia themselves are approximately 80 to 150 μm in diameter. Neither a or prothallus was observed. The upper cortex of the thallus, the outer protective layer, has a thickness of 50 to 60 μm, including a very thin outermost layer (). This cortex is made up of densely branched, mostly vertically aligned () hyphae, which are fungal filaments with thin walls and short cylindrical spaces inside (). These hyphae contain crystals that dissolve in potassium hydroxide (K). No remnants of algae are found within this layer. Directly beneath the cortex, the is continuous, 50 to 65 μm thick, and is composed of unicellular green algae, each up to 15 μm in diameter. The medulla (the inner layer beneath the algal layer) is white and contains crystals that do not dissolve in potassium hydroxide but do dissolve in 25% sulfuric acid (H2SO4), leading to the precipitation of needle-shaped crystals, indicative of calcium oxalate.

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Rujukan: [1]

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Habitat dan peran ekologis

Rhizoplaca ouimetensis is found exclusively in the Lake Nipigon ecoregion of Thunder Bay District, growing on exposed, near-vertical diabase sills amidst a boreal forest backdrop. Its presence is restricted to areas with a specific microclimate characterized by cool, humid air flows. Given its limited known occurrences and specific habitat requirements, Rhizoplaca ouimetensis is suspected to be rare throughout its range.

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Rujukan: [1]

Habitat atau konteks temuan

hutan

Substrat

Informasi belum tersedia pada sumber rilis ini.

Peran atau konteks

Pembentuk liken

Reproduksi

Soralia, structures that produce reproductive powdery called , are bright yellow and emerge from the areoles' surface. They can be individual or partially merged. The soredia themselves are approximately 80 to 150 μm in diameter. Neither a or prothallus was observed. The medulla (the inner layer beneath the algal layer) is white and contains crystals that do not dissolve in potassium hydroxide but do dissolve in 25% sulfuric acid (H2SO4), leading to the precipitation of needle-shaped crystals, indicative of calcium oxalate. No observations were made of apothecia (fruiting bodies that produce spores) or pycnidia (structures that produce asexual spores), which are often present in lichen species for reproduction.

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 Rhizoplaca ouimetensis (04304373), 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] Rhizoplaca ouimetensis — Wikipedia (en)Bagian sumber: Frozen revision 1341959306
   Tanggal penghimpunan sumber: 2026-10-12
   Teks sumber: CC BY-SA4.0 · Wikipedia contributors
2. [2] Catalogue of Life Base2026-09-11 — Rhizoplaca ouimetensisBagian sumber: ColDP NameUsage.tsv ID B2YLX; accepted species; source 2073
   Tanggal penghimpunan sumber: 2026-10-12
3. [3] Dokumentasi visual — Rhizoplaca ouimetensisBagian 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