Leptoderma iridescens G. 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

Leptoderma iridescens G. Lister, J. Bot. 51: 1. 1913

— Lectotypus (designated here): UNITED KINGDOM. England, Bedfordshire , Woburn Sands, 52.015ºN 0.649ºW, 4 Nov 1911, K. Higgins ( BM 3075 !, BM001089227 + three slides ( BM s.n.!, 2, 3, BM001223757 , BM001223758 , BM001223759 ) . Syntypus: UNITED KINGDOM. England, Bedfordshire , Leighton Buzzard, The Heath, 51.9166ºN 0.6617ºW, 5 Mar 1892, A . Lister ( BM 1404 !, BM001089229 ) . Syntypus: UNITED KINGDOM. England, Bedfordshire , Woburn Sands, 52.015ºN 0.649ºW, 22 Nov 1911, K . Higgins ( BM 3076 !, BM001089228 ) . Syntypus: UNITED KINGDOM. England, Bedfordshire , Leighton Buzzard, The Heath, 51.9166ºN 0.6617ºW, on fallen fir, 5 Mar 1892, A . Lister & J . Saunders ( BM 861 !, BM001089224 ) . Syntypus: UNITED KINGDOM. England, Bedfordshire , Leighton Buzzard, The Heath, 51.9166ºN 0.6617ºW, Dec 1894, A . Lister ( BM 3135 !, BM001089226 ) . Syntypus: UNITED KINGDOM, Scotland, Rothiemurchas Forest , 57.1591ºN 3.7872ºW, 14 Sep 1912, Miss A . Hibbert-Ware & G . Lister ( BM 3135 A!, BM001089225 ) . Syntypus :: UNITED KINGDOM, Scotland, Rothiemurchas Forest , 57.1591ºN 3.7872ºW, 14 Sep 1912, G . Lister & A . Hibbert-Ware ( BM 3533 !, BM001089230 ) . Syntypus: UNITED KINGDOM. England, Bedfordshire , Woburn Sands, 52.015ºN 0.649ºW, on dead leaves and moss, 22 Nov 1911, Miss K . Higgins ( BM 3532 !, BM001089231 ) . Syntypus: SWITZERLAND. Berne, Mürren , 46º33’34”N 7º53’32”E, on dead connifers wood, 1 Sep 1912, A . Hibbert Ware ( BM 3534 !, BM001089233 ) . Syntypus: SWITZERLAND. Berne, Mürren , 46º33’34”N 7º53’32”E ( BM s.n.!, BM001089235 ) .

[BM] 3075 / Leptoderma / iridescens GL / Woburn Sands, Beds. 4.11.11/ Miss K. Higgins/ N.XXXII.29–33,37/ BM001089227. + three slides BM s.n., 2, 3/ BM001223757, BM001223758, BM001223759. BM 1404 / Leptoderma iridescens G. Lister / see Journ. Bot., 1912/ Lamproderma physaroides Rost. / β. sessile/ The Heath, Leighton Buzzard/ leg. Lister Mar 5. 1892 / BM001089229. BM 3076 / Leptoderma iridescens G.L./ Woburn Sands, K.H./ 22.11.11/ XXXII.47/ BM001089228. BM 861 / Leptoderma iridescens G. Lister / On fallen fir, Heath. L.B. 5.3.92 V.90/ leg. Lister/ [& J. Saunders 3.93 N.VIIIp.8?]/ BM001089224. BM 3135 / Leptoderma iridescens G.L./ Hath Leighton 12.94 X.24,37/ BM001089226. BM 3135A / Leptoderma iridescens G.L./ Rothiemurchas Forest, 14.9.12/ AHW. & GL./ XXXII.172. 12.94 X.24,37/ BM001089225. BM 3533 / Leptoderma iridescens G. Lister / On bark of Pinus sylvestris L./ Rothiemurchas Forest, N.B. 14.9.1912 / leg. G. Lister & A. Hibbert Ware/ BM001089230. BM 3532 / Leptoderma iridescens G. Lister / in Journ. Bot. Li.p.1 (1913) Tab. 524 fig. 1/ on dead leaves and moss/ Woburn Sands, Beds. 22.11.1911 / leg. Miss K. Higgins/ BM001089231. BM 3534 / Leptoderma iridescens G. Lister / On dead connifers Wood, Mürren, Berne, Switzerland, 1.9.1912 / leg. A. Hibbert Ware/ BM001089233. BM s.n. Lepidoderma iridescens / G. Lister/ Mürren, Switzerland / BM001089235.

NOTES: G. Lister (1913a: 1) commented “I first found the dusky little sporangia in March, 1892, and again in December, 1894, in fir plantations at Leighton Buzzard, Bedfordshire, where they appeared on pine bark and dead leaves” later she wrote “In November, 1911, Miss Katherine Higgins found abundant sporangia on leaves and twigs amongst the lower parts of whortleberry bushes at Woburn Sands, Beds.”, and “Last September, Miss Hibbert-Ware and I obtained the same form in moist spruce woods near Mürren, Switzerland, and also in the ancient pine forest of Rothiemurchas, in the north of Scotland. I have since received it from M. Ch. Meylan, who gathered it in woods near La Vaux, in the Jura Mountains, about 4000 ft. alt., not far from Neuchatel, in October last.”

In BM we found 10 collections with original material. We designate BM 3075 as the lectotype because it is the best material, appears in the notes in notebook XXXII: 29–33,37 and is used for part of the original illustration .