Physarum echinosporum 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

Physarum echinosporum Lister, J. Bot. 37: 147. 1899

— Lectotypus (designated here): ANTIGUA. Leeward Islands , Antigua, 17º05’N 61º48’W, 1898, Forrest ( BM s.n.!, Cran collection For. 1, BM001089863 + two slides BM s.n.!, Forrest I, BM001223789 , BM001223790 ) . Isolectotypus ANTIGUA. Leeward Islands , Antigua, 17º05’N 61º48’W, on dead leaves, 1898, ded W. Cran, Mr. Forrest ( BM 1940 !, BM000006387 + one slide L:B.M.33B!, engraved 876, BM001223788 ) .

BM s.n. Cran collection For. 1/ Physarum / echinosporum List / Antigua, leg. Forrest, 1898/ NXVIIp.96/ BM001089863 + two slides Forrest I, BM001223789, BM001223790. [BM] 1940 / Physarum echinosporum List. / J. of Bot. Ap 1899 p 147/ ded Rev. W. Cran, leg Mr Forrest/ on dead leaves Antigua 1898/ BM 000006387 [revision label “ Type specimen/ D.T. Kowalski July 1971 ”] + one slide L:B.M.33B engraved 876, BM001223788.

NOTES: Lister (1899: 147), commented “ Mr. Cran has obligingly set me specimens of Mycetozoa from Antigua, which have been collected and transmitted to him since he left the island, by Mr. Forrest. They are species already obtained by Mr. Cran, with the exception of one which appears to have been not hitherto described.”, noting the substrate “On dead leaves”. In BM we located two boxes with material from Antigua, one is labelled “Cran collection” ( BM s.n.) and is collected by Forrest with reference to notebook XVII: 96[–98], where we found notes and illustrations which are reproduced in part in the original publication of the species, (Pl. 398, fig. 1a), so we consider this to be the lectotype. There are also two slides of this sample with reference to the same notebook page. The second box ( BM 1940 ) is in worse condition, the label has the same data and a reference to the publication so it appears to be a duplicate and we consider it to be an isolectotype. There is a slide of this collection (L:B.M.33B) .