Sebacina umbrina

Ciri dan struktur

Fructifications soft-gelatinous to waxy-gelatinous, resupinate, thin, effused, indeterminate, forming areas to 10 cm in longest dimension, pruinose, dull ochraceous brown when fresh, drying to a similarly coloured vernicose crust; margins concolorous or slightly paler, adnate. In section 150-250 µm thick, consisting of basal layer and hymenium, ascending layer present in older fructifications. Basal layer thin, composed of indistinct, agglutinated, hyaline hyphae lying parallel with substratum, clamp connections present. Ascending layer when present composed of distinct, loosely interwoven, clamped hyphae of irregular diameter. Hymenium composed of dikaryophyses, paraphysoids and basidia: dikaryophyses variable in shape, ranging from cylindrical or narrowly subclavate to finely and irregularly branched apically, projecting to 25 µm beyond basidia; paraphysoids cylindrical, subclavate or clavate, often irregular or strangulated, arising from fertile hyphae or hyphae bearing dikaryophyses, hyaline, thin-walled, contents hyaline, non-granular, 35-62 x 4.5-9 µm, probasidia initially clavate, later ovate to obovate, often short-stalked, proliferating through conspicuous basal clamp connections, 13.6-17.4 x 8.7-11 µm, becoming 2-celled by longitudinal septa or longitudinally cruciate-septate; sterigmata cylindrical, to 40 µm long. Basidiospores curved-cylindrical to allantoid, hyaline, apiculate, 11-15.5 x 4-4.7-(5.2) µm. Germination by repetition.

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Rujukan: [1]

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Habitat dan peran ekologis

On dead (1) Nothofagus truncata, Auckland, Orere, l.VI.l953, J. M. Dingley, 25013; (2) Weinmannia racemosa, Stewart Island, Half Moon Bay, 15.II.l954, J. M. Dingley, 25014. New Zealand specimens agree closely with North American and European descriptions of Sebacina umbrina. The cylindrical to clavate paraphysoids in S. umbrina have been variously interpreted. Both Rogers (1935) and McGuire (1941) regarded them as gloeocystidia homologous with those found in section Bourdotia, and included the species in subg. Bourdotia and sect. Bourdotia respectively. On the other hand, Wells (1957) considered that these structures differed from the gloeocystidia of Bourdotia and regarded them as paraphysoids, as did Luck-Alien (1963). Wells (1961) later termed them subcylindrical dikaryophyses. In New Zealand specimens, dikaryophyses are extremely variable in shape and in some instances closely resemble paraphysoids in size and shape, except for their irregularly branched apices. Sebacina umbrina has usually been considered an autonomous species but recently Wells (1961) included it within his greatly expanded concept of Exidiopsis grisea (Pers.) Bourd. & Maire. In his treatment of E. grisea Wells reduced a number of European and North American species to synonymy.

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Habitat atau konteks temuan

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Substrat

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Peran atau konteks

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Reproduksi

Fructifications soft-gelatinous to waxy-gelatinous, resupinate, thin, effused, indeterminate, forming areas to 10 cm in longest dimension, pruinose, dull ochraceous brown when fresh, drying to a similarly coloured vernicose crust; margins concolorous or slightly paler, adnate. In section 150-250 µm thick, consisting of basal layer and hymenium, ascending layer present in older fructifications. Basal layer thin, composed of indistinct, agglutinated, hyaline hyphae lying parallel with substratum, clamp connections present. Ascending layer when present composed of distinct, loosely interwoven, clamped hyphae of irregular diameter. Hymenium composed of dikaryophyses, paraphysoids and basidia: dikaryophyses variable in shape, ranging from cylindrical or narrowly subclavate to finely and irregularly branched apically, projecting to 25 µm beyond basidia; paraphysoids cylindrical, subclavate or clavate, often irregular or strangulated, arising from fertile hyphae or hyphae bearing dikaryophyses, hyaline, thin-walled, contents hyaline, non-granular, 35-62 x 4.5-9 µm, probasidia initially clavate, later ovate to obovate, often short-stalked, proliferating through conspicuous basal clamp connections, 13.6-17.4 x 8.7-11 µm, becoming 2-celled by longitudinal septa or longitudinally cruciate-septate; sterigmata cylindrical, to 40 µm long.

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Rujukan: [1]

Catatan identitas dan cakupan

• Nama diterima mengikuti Catalogue of Life Base2026-09-11; uraian mempertahankan konsep dan nama sumber aslinya.
• Historical description as cited by BiotaNZ. Preserve explicit New Zealand/locality, host and specimen qualifiers. Distribution is the cited source scope, not a current global range.
• 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 visual yang memenuhi pemeriksaan subjek dan hak penggunaan belum tersedia. Foto gejala, label, dan gambar yang meragukan tidak dihitung.

Sumber profil

1. [1] McNabb, R.F.R. 1969: New Zealand Tremellales - III. New Zealand Journal of Botany 7(3): 241-261. — Sebacina umbrinaBagian sumber: biota:1cb0f3f9-36b9-11d5-9548-00d0592d548c:1cb1a386-36b9-11d5-9548-00d0592d548c
   Tanggal penghimpunan sumber: 2026-10-12
   Teks sumber: CC BY 4.0 · McNabb, R.F.R. 1969: New Zealand Tremellales - III. New Zealand Journal of Botany 7(3): 241-261.
2. [2] Catalogue of Life Base2026-09-11 — Sebacina umbrinaBagian sumber: ColDP NameUsage.tsv ID 4W7C9; accepted species; source 2073
   Tanggal penghimpunan sumber: 2026-10-12