Alyxoria culmigena

Ciri dan struktur

The thallus of Alyxoria culmigena is very thin and may be barely visible, forming a smooth film that can be ash-grey, brown, or a dull olive-green; in some specimens it is largely immersed in the substrate and only weakly delimited. The fruiting bodies are the narrow, script-like apothecia () typical of the genus, appearing as scattered, dark lines about 0.5–1 (occasionally to 1.6) mm long and 0.15–0.3 mm wide, and standing only 0.04–0.10 mm high. They are usually simple but can occasionally fork, and lie directly on the thallus without a stalk. When young, the is visible only as a narrow slit, but it soon opens out to expose the interior and may sometimes carry a faint greenish dusting (). In section, the margin () is red-brown and does not react with potassium hydroxide (K–), while the uppermost layer () is brown and turns red-brown or remains brownish in this test; the hymenium beneath is 70–90 μm tall and stains red with iodine (I+). Ascospores are hyaline and three-septate, measuring (16–)18–24(–26) μm in length and (4–)5–7(–8) μm in width. They are somewhat club-shaped (), with one of the internal cells often slightly swollen, and have rounded ends. Each spore is surrounded by a thin but clearly visible outer layer () 0.5–1 μm thick, which is colourless when fresh but can become red-brown in over-mature material. Asexual structures are very rarely seen: pycnidia, when present, produce straight, rod-like conidia that are 3–6 × 0.5–1 μm. Standard spot tests on the thallus are all negative (C−, K−, KC−, Pd−, and UV−), and thin-layer chromatography has not revealed any lichen substances, indicating that the species lacks detectable secondary metabolites.

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Rujukan: [1]

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

Habitat dan peran ekologis

Alyxoria culmigena is a crustose epiphyte that usually grows on smooth, often shaded bark of shrubs and trees, for example in hedgerows and other sheltered stands near the coast. It is most frequently recorded from acidic to basic, smooth bark in shady situations, but also occurs on plant litter, soil, ground-dwelling mosses, plant stems such as brambles, and occasionally on wood or sandstone. Regional lichen floras describe it as a lowland species of mild, humid climates, growing below the montane belt in areas with relatively warm winters, particularly in coastal and sub-Mediterranean districts. In Europe, the species has been documented from several western and southern countries, including Italy, France, Britain and Ireland. Italian records place it mainly in Tyrrhenian regions with mild winters, below the montane belt, while atlases and online accounts report it on smooth bark in coastal areas of France and on trees in the British Isles and Ireland. Beyond Europe, Alyxoria culmigena has been recorded from oceanic islands in warm climates, including the Andaman and Nicobar Islands of India, where it was described as a new national record, and the Caribbean island of Sint Eustatius and other Dutch Caribbean localities.

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Rujukan: [1]

Habitat atau konteks temuan

Informasi belum tersedia pada sumber rilis ini.

Substrat

kayu

Peran atau konteks

Pembentuk liken

Reproduksi

Ascospores are hyaline and three-septate, measuring (16–)18–24(–26) μm in length and (4–)5–7(–8) μm in width. They are somewhat club-shaped (), with one of the internal cells often slightly swollen, and have rounded ends. Each spore is surrounded by a thin but clearly visible outer layer () 0.5–1 μm thick, which is colourless when fresh but can become red-brown in over-mature material. Asexual structures are very rarely seen: pycnidia, when present, produce straight, rod-like conidia that are 3–6 × 0.5–1 μm. Standard spot tests on the thallus are all negative (C−, K−, KC−, Pd−, and UV−), and thin-layer chromatography has not revealed any lichen substances, indicating that the species lacks detectable secondary metabolites.

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 Alyxoria culmigena menurut asosiasi foto pada record takson iNaturalist. Kredit: Michel Langeveld. Identitas mengikuti sumber; bukan penentuan spesimen independen.

Jenis

Fotografi

Kredit

(c) Michel Langeveld, some rights reserved (CC BY), uploaded by Michel Langeveld

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] Alyxoria culmigena — Wikipedia (en)Bagian sumber: Frozen revision 1353387724
   Tanggal penghimpunan sumber: 2026-10-12
   Teks sumber: CC BY-SA4.0 · Wikipedia contributors
2. [2] Catalogue of Life Base2026-09-11 — Alyxoria culmigenaBagian sumber: ColDP NameUsage.tsv ID CD6F; accepted species; source 2073
   Tanggal penghimpunan sumber: 2026-10-12
3. [3] Dokumentasi visual — Alyxoria culmigenaBagian sumber: Individual media record; identification follows the source, not independent determination
   Tanggal penghimpunan sumber: 2026-10-12
   Media sumber: CC BY 4.0 · (c) Michel Langeveld, some rights reserved (CC BY), uploaded by Michel Langeveld