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Lachnellula rhopalostylidis (Dennis) Korf 1977

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Lachnellula rhopalostylidis (Dennis) Korf, Mycotaxon 6 419 (1977)
Lachnellula rhopalostylidis (Dennis) Korf 1977

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Endemic
Present
New Zealand
Political Region

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(Dennis) Korf
Dennis
Korf
1977
419
ICN
NZ holotype
species
Lachnellula rhopalostylidis

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rhopalostylidis

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Apothecia gregaria, sessilia, pallido-albida, siccitate pallido-lutea vel carnea, latit. 0.5-0.75 mm., margine tenuiter albo-villosulae fimbriato. Asci oblongati, octospori, 115 x 10-11 µ, apice ultimo obsolete jodo coerulescente; ascosporae conglobatae, bacillares, arcuatae, hyalinae, 75-80 x 2 µ; paraphyses filiformes, crassit 2 µ. Pili cupulae brevissimi, articulati, apice obtusi, tenue-tunicati, 25-45 x 3-4 µ.
One may, perhaps, question the propriety of assigning to Arachnopeziza a fungus without a visible subiculum. The apothecia, however, are densely crowded over extensive, sharply defined, patches of the substrate, distinctly paler coloured than the remainder and must arise from a common mycelial mat even if it does not form an evident subiculum. The fasciculate ascospores, slender thin-walled hairs and cylindrical obtuse paraphyses all agree with Arachnopeziza, though the spores do not appear to become septate in the asci. The alternative genus without a subiculum would seem to be Lasiobelonium, the type species of which, Belonidium amoenum Speg., is imperfectly known.
In foliis Rhopalostylidii sapidi (Palmae), Henderson, Waitakere Ra., Auckland, 11.12.1955, Dingley 18975 (typus)

Lachnellula rhopalostylidis (Dennis) Korf 1977

See Manaaki Whenua datastore https://doi.org/10.7931/wrwv-2563, Erioscyphella in New Zealand

Lachnellula rhopalostylidis (Dennis) Korf 1977

Recently Dr. John H. Haines, New York State Museum, called to my attention a collection taken by S. J. Hughes on 8. V. 1963 of Arachnopeziza rhopalostylidis Dennis (1961). Like the type specimen, it was collected on dead leaves of Rhopalostylis sapida, a palm, and the specimen (DAOM 156811) was obtained near the type locality, at Waiatarua, Waitakere Range, Auckland Province, New Zealand. It is unquestionably the species described by Dennis, and has densely gregarious apothecia totally devoid of a subiculum, with filiform ascospores that remain non-septate for a long time (but, as shown to me by Dr. Haines, eventually develop 1-3 septa). Dennis drew smooth hairs, but they are distinctly finely granulate; some are thick-walled apically, others not; some are tipped by a resinous material. The thick-walled asci have a tapering, J+ pore-wall (Dennis wrote, "apice ultimo obsolete jodo coerulescente"). Significantly, the hyphae of the ascocarp are all long-celled and glassywalled, bound in a gel (except for the loose hairs). This is no Arachnopeziza, and the species must even fall outside of the Hyaloscyphoideae. It fits rather well within the concept of the Trichoscyphelloideae (Korf, 1973), and since it differs only in minor respects from species I now.range in Lachnellula Karst. emend. Dennis (inclusive of Trichoscyphella Nannf.) I propose its transfer:

LACHNELLULA RHOPALOSTYLIDIS (Dennis) Korf, comb. nov.

Basionym: Arachnopeziza rhopalostylidis Dennis, Kew Bull. 15: 302. 1961.

Assignment of Dennis's species to Lachnellula is in keeping with the current, broad concept of the genus, no longer restricted to spherical-spored species such as L. chrysophthalma ("Pers.") Karst. [= L. suecica (Fuckel) Nannf. in Lund. & Nannf.], but with the oval-spored and filiform-spored species previously treated as members of Trichoscyphella. This emendation by Dennis (1962) has been followed by such workers as Dharne (1965) and Raltviir (1970). In its earlier, more restricted sense, the species assigned to the genus were normally on coniferous hosts, but in its broader delimitation, hosts of many families occur. Whether such anomalous species as L. theiodea (Cke. & Ell.) Sacc. (cfr. Korf, 1962) can still be accommodated in the genus is open to serious doubt (Dennis, Dharne, and Raltviir, loc. cit., all fail to mention this species). But quite clearly an interface exists betweeen the Trichoscyphelloideae (with its one genus, Lachnellula) and species that have been placed in the Phialeoideae, particularly in such genera as Cyathicula (inclusive of "Phialea," cfr Dumont & Korf, 1977) and Belonioscypha, on the one hand, and species still ranged in Dasyscyphus (in its broad sense) on the other. Whether L. rhopalostylidis needs to segregated into some as yet undescribed genus will have to wait for further data. Information on tropical members of the Hyaloscyphaceae currently being undertaken by Dr. Haines should throw light on affinities in this group. But clearly the species cannot be accommodated in Arachnopeziza, and its transfer out of the genus now at least calls attention to its probable relatives.

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Lachnellula rhopalostylidis (Dennis) Korf 1977
Lachnellula rhopalostylidis (Dennis) Korf
Lachnellula rhopalostylidis (Dennis) Korf 1977
Lachnellula rhopalostylidis (Dennis) Korf (1977)
Lachnellula rhopalostylidis (Dennis) Korf 1977
Lachnellula rhopalostylidis (Dennis) Korf (1977)
Lachnellula rhopalostylidis (Dennis) Korf 1977
Lachnellula rhopalostylidis (Dennis) Korf (1977)

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Lachnellula rhopalostylidis (Dennis) Korf 1977
New Zealand
Auckland
Lachnellula rhopalostylidis (Dennis) Korf 1977
New Zealand
Buller
Lachnellula rhopalostylidis (Dennis) Korf 1977
New Zealand
Coromandel
Lachnellula rhopalostylidis (Dennis) Korf 1977
New Zealand
Northland
Lachnellula rhopalostylidis (Dennis) Korf 1977
New Zealand
Waikato

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taxonomic status
Based on unpublished ITS sequences, L. rhopalostylidis is genetically distant from other specimens considered typical of Lachnellula, e.g. Lachnellula suecica, KC464642 (CBS 268.59 ex Muller ex France), L, flavovirens, etc., and has a sister relationship with Lachnum palmae, another species with gelatinous excipular tissue, both species perhaps belonging in Erioscyphella sp.; the thick-walled excipular cells fit for this genus, cf Tanaka & Hosoya (2001) [PRJ, Aug 2019]

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1cb18fd9-36b9-11d5-9548-00d0592d548c
scientific name
Names_Fungi
21 December 1992
1 May 2003
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