Chrysothrix onokoensis

Ciri dan struktur

Chrysothrix onokoensis forms a crustose (crust-like), - thallus that appears as a thick, bright yellow to bright yellow-green growth on rock surfaces. The thallus lacks a protective outer layer () and is loosely attached to the , making it easy to separate from the rock. It does not form well-defined but instead creates extensive, irregularly spreading patches up to 10 cm wide and about 1 mm thick. The lichen's structure consists of two distinct layers: an upper layer of yellow granules and a lower layer of whitish to brownish (fungal filaments that attach to the substrate) up to 0.6 mm thick. These rhizohyphae are initially colorless but become brown with age, measuring 3.5–6.5 μm in thickness. The (the algal partner in the lichen symbiosis) is a green alga that is spherical in shape and measures between 7–20 μm in diameter, most commonly 10–15 μm. The granules that make up the upper layer are variable in shape, either spherical or somewhat irregular, measuring 20–80 μm across, and usually have projecting fungal filaments (hyphae). These hyphae are colorless, 2.5–4.5 μm thick, and possess a rough, colorless sheath up to 1.0 μm thick. No reproductive structures such as apothecia (fruiting bodies) or pycnidia have been observed in this species. Chemical tests (spot tests) on the lichen produce negative results, though it may show a dull orange reaction under ultraviolet light. The primary secondary metabolite present appears to be leprapinic acid, though further studies are needed to confirm this. A lookalike rock-dwelling species with a similar distribution is Chrysothrix susquehannensis.

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Rujukan: [1]

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Habitat dan peran ekologis

Chrysothrix onokoensis primarily grows on shaded sandstone rocks, with one documented exception from Alabama where it was found on limestone. It thrives in sheltered environments beneath large, damp acidic rock formations. The species has a somewhat disjunct distribution pattern, with most collections coming from the southeastern United States, particularly Arkansas, where it has been found in multiple locations within the Ozark – St. Francis National Forest, including the Boston Mountains, White Rock Wildlife Management Area, Alum Cove recreation area, and Blanchard Springs recreation area. Other documented locations include Buck's Pocket State Park in Alabama and Broxton Rocks ecological preserve in Georgia. The type locality in Glen Onoko, Carbon County, Pennsylvania appears somewhat isolated from the main distribution range of the species. However, this area is known to harbor rare plants that are disjunct from more southern regions, including species typically found in the Ozarks. Unlike the similar species Chrysothrix chlorina, which has a different distribution pattern, C. onokoensis seems to prefer the specific environmental conditions found in these scattered, protected rocky habitats of the eastern United States.

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Rujukan: [1]

Habitat atau konteks temuan

hutan

Substrat

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Peran atau konteks

Pembentuk liken

Reproduksi

The granules that make up the upper layer are variable in shape, either spherical or somewhat irregular, measuring 20–80 μm across, and usually have projecting fungal filaments (hyphae). These hyphae are colorless, 2.5–4.5 μm thick, and possess a rough, colorless sheath up to 1.0 μm thick. No reproductive structures such as apothecia (fruiting bodies) or pycnidia have been observed in this species. Chemical tests (spot tests) on the lichen produce negative results, though it may show a dull orange reaction under ultraviolet light. The primary secondary metabolite present appears to be leprapinic acid, though further studies are needed to confirm this.

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 Chrysothrix onokoensis menurut asosiasi foto pada record takson iNaturalist. Kredit: hansk. Identitas mengikuti sumber; bukan penentuan spesimen independen.

Jenis

Fotografi

Kredit

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

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] Chrysothrix onokoensis — Wikipedia (en)Bagian sumber: Frozen revision 1341958053
   Tanggal penghimpunan sumber: 2026-10-12
   Teks sumber: CC BY-SA4.0 · Wikipedia contributors
2. [2] Catalogue of Life Base2026-09-11 — Chrysothrix onokoensisBagian sumber: ColDP NameUsage.tsv ID V2DP; accepted species; source 2073
   Tanggal penghimpunan sumber: 2026-10-12
3. [3] Dokumentasi visual — Chrysothrix onokoensisBagian sumber: Individual media record; identification follows the source, not independent determination
   Tanggal penghimpunan sumber: 2026-10-12
   Media sumber: CC BY 4.0 · (c) hansk, some rights reserved (CC BY), uploaded by hansk