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

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

Genus : Chroococcus Naegeli, 1849 Chroococcus bituminosus (Bory) Hansgirg, 1885 Protococcus bituminosus Kütz., Tab. Phyc, 1, 1846, p. 5 ; Chroococcus bituminosus (Bory) Hansgirg, Österr. Bot. Ueitschr., 55, 1885, p. 116 ; Prodr. Algenfl. Böhmen, 1892, p. 165. Specimens occurring in Harkány agree with description of dimensions and form of type. Vegetative cells spherical, brownishgreen or dark, dingy, bluishgreen, 1,6—1,8 Li in diameter, with thin, colorless, integument, closely enveloping cells. Cells brownish-bluish-green. — Due to nannocyte formation, Geitler suggests that Gloeocapsa bituminosa (Bory) Kütz. published by H a u c k & Richter (Phyc. univ., Nr. 749), listed by F o r t i (in De Toni Syll. Alg., 1907, p. 22) as one of the synonyms of Chroococcus bituminosus, is not identical with it, but a Gloeocapsa species in a state of nannocyte production. Namely, nannocyte production occurs also in Chr. bituminosus. Gollerbach, Koshinskaja&Polianskij (1953, p. 104), uniting the species Chr. bituminosus Hansg. & Chr. caldariorum Hansg. under the name Gloeocapsa bituminosa (Bory) Ktz., relegate it to the genus Gloeocapsa. On the other hand, Drouet&Daily (Butl. Univ. Bot. Stud., 12, 1956, p. 137) consider the species, on the basis of their examination of the original specimen, identical with the plant described by Kützing as Palmogloea protuberans (Sm. & Sow.) Ktz. (Phyc. Gen., 1843, p. 176). Occurrence : a

) On the wall of the thermal cooling basin in Harkány (never in masses) ; b) Hajdúszoboszló (Kol 1932). Chroococcus membraninus (Menegh.) Naegeli, 1849 Pleurococcus membraninus Menegh., Mem. R. Acad. Torino, ser. 2, 5, Sc. Fis. et Nat., 34, 1843, T. IV, f. 1 ; Protococcus membraninus Menegh., in Kiit z., Tab. Phyc, 1, 1846, 5 ; Chroococcus membraninus Nägeli, Gatt, einzell. Alg., 1849, p. 46 ; Rab h., Fl. Eur. Alg., II, 1865, p. 31. Specimens occurring in Harkány spherical or almost spherical ; blue o bluish-green cells, 2—4 LI in diameter, forming families by 2 or 4 p integumen not lamellated, thick, colorless. Drouett/Daily relegate the species to Anacystis thermalis Dr. Daily f. thermalis (Drouet&Daily, Butler Univ. Bot. Stud., 10, 1952, p. 221). Occurrence : a) On the wall of the thermal well in Harkány ; b) In the thermae of Budapest (according to A. G r u n o w, with no nearer indication of locality, 1864—68, in Raben h., Fl. Europ. Alg., p. 31); c) Pöstyén (V i 1 h e 1 m 1924); in thermarum Euganearum, Italy (Menegh 1843); d) Karlsbad (Hansg. 1892), California (Tilden 1910), Kamchatka (Boye — Petersen 1946) ; Yunotubo, Hokkaido, Japan (Y o n e d a 1938—42). Chroococcus minor (Kütz.) Naegeli, 1849 Gatt, einzell. Alg., 1849, p. 47, T. 1, A, f. 4 ; Protococcus minor Kütz., exp. Tab. phycol., 1, T. 3, according to Hansgirg; Prodr. Alg. Fl. Böhmen, 2, 1892, p. 165, as Chroococcus minor. Dimension and form of specimens agree with description of type. Colony consists of dingy, olive greenish cells, gelatinous. Cells 3—4 u in diameter, membrane colorless, thin. Cells singly, rarely in twos ; sometimes several cells connected into families by fine, gelatinous material.