Szekessy Vilmos (szerk.): A Magyar Természettudományi Múzeum évkönyve 53. (Budapest 1961)

Halász, M.: The microvegetation of the acrothermae of Harkány

Chroococcus turgidus (Ktz.) Naegeli, 1849 var. thermalis (Kütz.) Rabenh., 1865 Naegeli, Gatt, einzell. Algen, 1849, p. 46 (type) ; ß. thermalis Rabenh., Fl. Europ. Alg., II, 1865, p. 33. Cellular dimensions of specimens occurring in Harkány 7,7—10,5 LI without integument. Cells vivid bluish-green or olive green. Membrane not lamellated, form is differring thereby from type. — Geitler, on the other hand, observed more or less lamellated integuments on the specimens collected by R u 11 n e r in Western Java (Ajer Panas) (Geitler & Ruttner, Arch. f. Hydrobiol. Suppl., 14, 1936). Drouet & Daily draw the variety under Anacystis dimidiata Dr. & Daily (Butl. Univ. Bot. Stud., 10, 1952, p. 221). Occurrence : a) Sporadically on the wall of Spring Well II, in Harkány, b) Óbuda, Budapest (Halász 1942). c) Pöstyén (V i 1 h e 1 m 1924). d) Yellowstone Park, N. America (Copeland 1936), Western Java (Geitler&Ruttner 1936) ; Hokkaido, Gihu, Japan (Emoto&Yoneda 1940) ; Kamchatka (Boye — Petersen 1946, type ; E 1 e n k i n, 1914 (Type). Chroococcus varius A. Br., 1876 A. Bra u n, in Rabe n h.. Die Algen Europas, Dec. no. 216, 248, 1876 ; For t i, in De Toni, Syllog. Alg., 1907, 5, p. 21. Specimens occurring in Harkány agree morphologically with type. Colonies yellowish, gleationous ; cells greyish-green or bluish-green, mostly in pairs, seldom forming larger cell families ; 2—4 LI without integument, 4—8 LI in diameter with sheath, spherical. Gollerbach, Koshinskaja&Polianskij (1953, p. 100) relegate the species to the genus Gloeocapsa, by the name Gleocapsa varia (A. Br.) Gollerbach (in E 1 e n k i n, Monogr. Algar. Cyanophyc, Pars Spec, 1, 1938 p. 208), identifying it also with Chr. montanus Hansg., of which latter Hansgirg notes that (Prodr., 2, p. 160) „diese Form steht dem Chr. varius A. Br. am nächsten". Drouet&Daily describe it by the name Pleurocapsa varia Dr. & Daily (Amer. Midi. Nat., 27, 1942, p. 244), then again reallocate it in the genus Anacystis, by the name Anacystis montana Dr. & Daily (Butl. Univ. Bot. Stud., 10, 1952, p. 221). Occurrence : a) On the walls of the spring wells and the mud basin in Harkány, d) Yellowstone Park, N. America (Weed in Tilden 1910, Copeland 1936). Genus : Synechococcus Naegeli, 1849 Synechococcus elongatus Naegeli, 1849 Gatt, einzell. Algen, 1849, p. 56, F. I., E (type) ; fa. thermalis Geitler, Arch. f. Hydrobiol., Suppl., 14, 1936, p. 382. Specimens occurring in Harkány somewhat larger than type, 2,1—2,8 /j, in diameter, one and a half times or twice as long as broad. — Naegeli records, in his original description, cell sizes "1/1400"" dick und 11/2 bis 3 mal so lang", while Geitler (1930, p. 273) measured 1,4—2 LI cells. — Cells vivid bluishgreen ; mostly in pairs. The form described by Geitler by the name fa. thermalis (G e i 1

1. &, R u 11 n., 1936, p. 382), found by R u 11 n e r in hot, sulphur springs in Su-