Rhizocarpon lecanorinum

Ciri dan struktur

Rhizocarpon lecanorinum forms a bright yellow–green crust that reaches about 4 cm across, though neighbouring thalli commonly merge to make extensive, continuous patches. The surface is divided into small, tile-like (1–2 mm in diameter), which are , smooth, and sit on a distinct black (a narrow border of fungal tissue). Areoles begin rounded and slightly convex; as black fruiting (apothecia) develop beside them, the areoles curve around the discs so the apothecia appear rimmed by yellow thallus—a pseudo- margin. The internal white layer (medulla) gives an iodine-positive blue reaction (I+ blue). Apothecia are small (to about 1 mm across), black and not frosted (non-), broadly circular and flat to shallowly concave. The () persists but is often thin and indistinct; its inner part is colourless while the outer rim is brown-black and unreactive to potassium hydroxide solution (K–). The upper hymenial surface () is pale olive-brown and may turn greener with K, the spore-bearing layer (hymenium) is colourless to faintly green, and the layer beneath () is thin, brown-black, and K–; no crystals are present in the apothecia. Ascospores are dark brown and (partitioned into many chambers like brickwork), measuring 34–57 × 15–24 μm with about 15–38 cells visible in optical section. Spot tests on the medulla are K+ (yellow) and Pd+ (orange), indicating stictic acid (often in low concentration) together with rhizocarpic acid.

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

Field studies comparing Rhizocarpon lecanorinum with the map lichen R. geographicum found that neighbouring thalli of R. lecanorinum commonly merge without leaving visible boundaries, producing continuous carpets of areoles. By contrast, thalli of R. geographicum (especially subsp. prospectans) remain sharply delimited from one another and form a mosaic. The coalescing habit in R. lecanorinum has been interpreted as evidence of somatic compatibility among very closely related—or even clonal—individuals, whereas the mosaic pattern in R. geographicum is consistent with somatic incompatibility between distinct genotypes. In the same comparisons, R. geographicum typically produced many pycnidia, while R. lecanorinum bore scarce pycnidia but developed apothecia even at small thallus sizes and high colony density. A facultative parasitic relationship has been observed in which Schaereria fuscocinerea invades thalli of R. lecanorinum, spreads outward through the host, and replaces the host's cortex and algal layer with its own tissues; co-occurring R. geographicum resisted such invasion. Occasional parasitism by Protoparmelia badia on R. lecanorinum has also been observed.

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

Apothecia are small (to about 1 mm across), black and not frosted (non-), broadly circular and flat to shallowly concave. The () persists but is often thin and indistinct; its inner part is colourless while the outer rim is brown-black and unreactive to potassium hydroxide solution (K–). The upper hymenial surface () is pale olive-brown and may turn greener with K, the spore-bearing layer (hymenium) is colourless to faintly green, and the layer beneath () is thin, brown-black, and K–; no crystals are present in the apothecia. Ascospores are dark brown and (partitioned into many chambers like brickwork), measuring 34–57 × 15–24 μm with about 15–38 cells visible in optical section. Spot tests on the medulla are K+ (yellow) and Pd+ (orange), indicating stictic acid (often in low concentration) together with rhizocarpic acid.

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 Rhizocarpon lecanorinum dari Wikimedia Commons. Jane Bald, Tennessee border, 20110622 Identifikasi mengikuti record berkas sumber.

Jenis

Fotografi

Kredit

Jason Hollinger

Lisensi

CC BY 2.0

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] Rhizocarpon lecanorinum — Wikipedia (en)Bagian sumber: Frozen revision 1340011868
   Tanggal penghimpunan sumber: 2026-10-12
   Teks sumber: CC BY-SA4.0 · Wikipedia contributors
2. [2] Catalogue of Life Base2026-09-11 — Rhizocarpon lecanorinumBagian sumber: ColDP NameUsage.tsv ID 4SC5J; accepted species; source 2073
   Tanggal penghimpunan sumber: 2026-10-12
3. [3] Dokumentasi visual — Rhizocarpon lecanorinumBagian sumber: Individual media record; identification follows the source, not independent determination
   Tanggal penghimpunan sumber: 2026-10-12
   Media sumber: CC BY 2.0 · Jason Hollinger