Typification of the myxomycete taxa described by the Listers and preserved at the Natural History Museum, London (BM) Author Lado, Carlos Real Jardín Botánico (CSIC), Plaza de Murillo, 2. 28014 Madrid (Spain) Author Basanta, Diana Wrigley De Real Jardín Botánico (CSIC), Plaza de Murillo, 2. 28014 Madrid (Spain) & 39, Madeley Drive, West Kirby, Wirral, CH 48 3 LB, UK * Corresponding author e-mail: lado @ rjb. csic. es & Real Jardín Botánico (CSIC), Plaza de Murillo, 2. 28014 Madrid (Spain) lado@rjb.csic.es text Phytotaxa 2018 2018-03-02 341 1 448 450 http://dx.doi.org/10.11646/phytotaxa.341.1.1 journal article 10.11646/phytotaxa.341.1.1 1179-3163 13719359 Physarum bethelii T. Macbr. ex G. Lister , in Lister, Monogr. mycetozoa, ed. 2, 57. 1911 ≡ Physarum viride var. bethelii (T. Macbr. ex G. Lister) Sturgis , Colorado Coll. Stud. Sci. Ser. 12(12): 439. 1913 — Lectotypus (designated here) : U.S.A. Colorado , Colorado Springs , Cheyenne Mountain , 38º44’N 104º52’W , 10 Aug 1908 , Dr . W.C. Sturgis WCS A 62 ( BM 2134 !, BM001089850 ) . Syntypus : U.S.A. Colorado , Colorado Springs , Cheyenne Mountain , 38º44’N 104º52’W , 10 Sep 1908 , Dr . W.C. Sturgis WCS A 62 ( BM s.n.!, two boxes WCS A 62 BM001247131 , BM001247132 + one slide BM s.n.!, BM001223779 ) . Syntypus : U.S.A. Colorado , 1908?, E. Bethel ( BM 2133 !, Macb. 73, BM001089851 ) BM 2134 (WCS A 62 )/ Physarum bethelii Macbr. / Cheyenne Mt./ Colorado Springs/ Colo./ Aug. 10.08 (St.2.128)/ BM001089850 [sheet label dated: 12 JUN. 1912 : “BM 2134/ Physarum bethelii Macbr. in litt./ Cheyenne Mt., Colorado Springs/ 10.8.1908 , leg. Dr . W.C. Sturgis”]. BM s.n. two boxes WCS A 62 / Physarum viride Pers. / var. bethelii Sturg. / Cheyenne Mt./ Colorado Springs/ Colo./ Sept.10.08 St. 2 p. 119/ BM001247131, BM001247132 + one slide, BM001223779. BM 2133 / Physarum bethelii Macbr. in litt./ Colorado , leg. E. Bethel, 1908?/ (Macb. 73)/ (NXXVIII.123)/ Botanical Laboratory State University of Iowa / Tilmadoche / bethellii/ n.s./ Colorado 08./ BM001089851. [Two revision labels, one by D.T. Kowalski July 1971 “ Type specimen”, and another by G. Adamonyte “Examined 21–11–2002 macroscop., no slides made.”]. NOTES : Lister (1911: 57) reported this species as “ P. bethelii Macbr. in litt.” and based her description on the American material “On dead wood.– Colorado ( BM 2133 , 2134 ).”. The author added “It has been found twice, each time in Colorado , once by Mr. E. Bethel , once by Dr. Sturgis ”. In BM both collections were located ( BM 2133 and BM 2134 ) and we designate the second as the lectotype , as it is in better condition and has notes and drawings in the notebook St.2: 128 where G.Lister kept of all specimens received from Sturgis. In notebook XXVIII: 123–124 there are notes on collection “Macb. 73” ( BM 2133 ). There were also 4 more boxes from the same place and two of them are labelled WCS [Sturgis] A62, and a slide with a reference to the Sturgis notebook (St.2: 119). These could all be duplicates of BM 2134 , that bears the number WCS A62 , but they are from a later date. The other boxes are labelled WCS 781 from Aug. 27.08 and Aug. 8.12, and have a reference to the Sturgis notebook ( St. 2: 166, 167, 168) where we found notes and illustrations of this material .