Hemitrichia imperialis G. Lister, Trans. Brit. Mycol. Soc.

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

Hemitrichia imperialis G. Lister, Trans. Brit. Mycol. Soc. 14: 226. 1929

≡ Arcyria imperialis (G. Lister) Q. Wang & Yu Li , Trichiales China 48. 2006

— Lectotypus (designated here): JAPAN. Tokyo Prefecture, Tokyo, gardens of the Akasaka Imperial Palace , 35º40’48”N 139º43’43”E ,

on Prunus grayana Maxim. , 23 Jan 1928, the Emperor of Japan [Emperor Shôwa, Hirohito] and presented by him to the British Museum ( BM 4067 !, BM001085195 + one slide, BM001223775 ). Syntypus: JAPAN. Tokyo Prefecture, Tokyo, gardens of the Akasaka Imperial Palace , 35º40’48”N 139º43’43”E, a culture from spores of the typus [see BM 4067 ] obtained by Dr. H. Hattori in the Biological Laboratory, Imperial Palace, Tokyo, 30 Apr 1928, ( BM 4068 !, BM001085196 + one slide, BM001223776 ) .

BM 4067 / Hemitrichia imperialis G. Lister , type / on Prunus grayana Maxim. 23 Jan. 1928,/ Gathered in the gardens of the Imperial Palace,/ Tokyo, Japan, by the Emperor of Japan / and presented by him to the British/ Museum/ BM001085195. “ Type specimen” + one slide Hattori 4067/ Hemitrichia /imperialis/ Alasaka Palace/ Tokyo. 23.1.28/ XLIV.188/leg. Emperor of Japan / BM001223775. BM 4068 / Hemitrichia imperialis G. Lister / A culture from spores of the type (see BM 4067)/ obtained by Dr. H. Hattori in the Biological/ Laboratory, Imperial Palace, Tokyo, Japan./ April 30.1928: spores sown Feb1.1928/ BM001085196. + slide BM 4068/ Hemitrichia imperialis G. Lister /from spore culture of type, Biological/ Lab 9, Imperial Palace/ Tokyo: made by/ H. Hattori. 4.1928/ BM001223776.

NOTES: G. Lister (1929: 226) commented “In April, 1928, I received from Dr. Hattori, of the Biological Laboratory,

Imperial Palace , Tokyo Japan, two specimens of Mycetozoa”, one of them was this Hemitrichia . She later states “In

August, 1928, I received from Dr. Hattori a further specimen of the Hemitrichia , which had developed in his laboratory from a culture of spores taken from the former gathering.” and under habitat of the species noted “On decayed Wood in the grounds of the Imperial Palace, Tokyo, Japan.” Fig.1 of the publication illustrates “Group of sporangia from Dr .

Hattori’s spore culture”. In BM there are 2 boxes, BM 4067 , of material received April 1928, and BM 4068 received

August, 1928 from the culture. BM 4067 is in good condition and is the first specimen to be examined by G.Lister and we select this as the lectotype. In the Showa Memorial Institute ( SMI), Tsukuba Research Center of the National

Science Museum , Tokyo ( TNS) specimens TNS – M 1519 , 1520 , 1521 , 1522 from April 1928 ( Hagiwara, 2005) are conserved and may be duplicates of the lectotype designated here. In notebook XLIV: 187–191, 195 there are notes and illustrations of collection BM 4067 , material collected and presented to the British Museum by the Emperor himself in

April 1928. The taxonomic value of this species is doubtful and some authors have transferred it to the genus Arcyria

( Wang & Li, 2006), and others like Nannenga-Bremekamp (1982) consider it to be a synonym of Arcyria stipata

(Schwein.) Lister.

Figures

FIGURE 1. Map of London 2017 showing the area (box) in the lower map. (https://maps.google.com). FIGURE 2. Leytonstone in 1805. The location of the Lister home and of Upton, where Arthur Lister grew up, are marked with arrows. (This work is based on data provided through www.VisionofBritain.org.uk and uses historical material which is copyright of the Great Britain Historical GIS Project and the University of Portsmouth).