Dictydium umbilicatum var. fuscum Lister, J. Bot.

Lado, Carlos & Basanta, Diana Wrigley De, 2018, Typification of the myxomycete taxa described by the Listers and preserved at the Natural History Museum, London (BM), Phytotaxa 341 (1), pp. 448-450 : 448-450

publication ID	https://doi.org/ 10.11646/phytotaxa.341.1.1
persistent identifier	https://treatment.plazi.org/id/710DDF7F-FFA9-3D27-30A9-FF53FBB59B08
treatment provided by	Felipe
scientific name	Dictydium umbilicatum var. fuscum Lister, J. Bot.
status

Treatment

Dictydium umbilicatum var. fuscum Lister, J. Bot. View in CoL 36: 120. 1898

≡ Dictydium cancellatum var. fuscum (Lister) G. Lister , in Lister, Monogr. mycetozoa, ed. 2, 185 (1911)

≡ Dictydium cancellatum subsp. fuscum (Lister) Meyl., Bull. Soc. View in CoL Vaud. Sci. Nat. 59:485 (1937)

≡ Cribraria cancellata var. fusca (Lister) Nann. View in CoL -Bremek, Nederlandse Myxomyceten (Zutphen) 93 (1975) [Proposed earlier by the same author in Acta Bot. Neerl. 11:22. 1962, but nom. inval., ICN, art. 41.5 (ICBN, art. 33.3), basionym reference omitted]

= Cribraria cancellata (Batsch) Nann. -Bremek, Nederlandse Myxomyceten (Zutphen) 92. 1975

— Lectotypus (designated here): UNITED KINGDOM: England, Hampshire, New Forest, Bolderwood, Hants , 50º51’20”N 1º37’20”W, 25 m, 5 Aug 1895, A. Lister & G. Lister ( BM 2775 !, BM001095267 ) GoogleMaps . Syntypus: GERMANY: Berlin, Jungfernheide , 52º32’33”N 13º17’44”E, 50 m, 1898, E. Jahn ( BM 2778 !, BM001089873 ) GoogleMaps .

BM 2775 / Dictydium cancellatum / (Batsch) Macbr./ var. fuscum Lister / New Forest, Hants/ BM001095267 [sheet label dated 18 JUN 1913: “BM 2775/ Dictydium cancellatum (Batsch) Macbr. / var. fuscum / Bolderwood, New Forest, Hants. 5.8.1895 / leg. A. & G. Lister”]. BM 2778 / Dictydium cancellatum / (Batsch) Macbr./ Berlin / BM001089873 [sheet label dated 18 JUN 1913: “BM 2778/ Dictydium cancellatum (Batsch) / Macbr./ type & var. fuscum Lister / Jungfernheide, Berlin, 1898 leg Dr Jahn. (fragment ss. “v. fuscum ”)”].

NOTES: Lister (1898a: 120) commented “The brown variety with a symmetrical cup (referred to in the Brit. Mus. Cat.

Myc. p. 148), though less frequent, is also cosmopolitan, and is so little subject to variation that it deserves a varietal, if not a specific, distinction. I mark it as var. fuscum .”. In BM we found two collections, BM 2775 is the best sample and collected by the author, and so we designate it here as the lectotype. The BM 2778 has two fragments on a cardboard .

The fragment marked “ss. v. fuscum ” we consider to be a syntype. Some authors such as Nannenga-Bremekamp (1975,

1991) still recognise this variety, but others don’t ( Martin & Alexopoulos 1969).