Dictyostelium clavatum H. Hagiw., Cryptogams, 1992

Liu, Pu & Li, Yu, 2014, Dictyostelids from Jilin Province, China. I, Phytotaxa 183 (4), pp. 279-283 : 281

Dictyostelium clavatum H. Hagiw., Cryptogams of the Himalayas, 26 (1990).

Sorocarps ( Fig 1I ) solitary, phototropic, mostly unbranched, sometimes irregularly branched. Sorophores colorless, 0.4–5.0 mm high, gradually tapering from bases to tips, bases ( Fig 1J ) clavate, tips ( Fig 1H ) clavate. Sori white, globose, 50–300 µm diam. Spores ( Fig 1L ) hyaline, ellipsoid, usually 5.5–7.5 × 3.0–4.0 µm, without polar granules. Cell aggregations ( Fig 1K ) radiate in pattern. Pseudoplasmodia sometimes migrating without sorophore formation, usually producing single sorogens.

Cultures examined. HMJAU MR045 . Strain 0385–3, Strain 0385–4, and Strain 0385–5 isolated from coniferous forest soil collected in Huangnihe, Dunhua City, Jilin Province, China .

Known distribution. Nepel, Japan, and China.

Commentary. This species has been reported from Taiwan by Fan et al. (2002). Finding the species in Jilin represents an important extension of its distribution in China.

Figures

FIGURE 1.A–E: Dictyostelium multistipes, (F, G) D.gracile, and (H–L) D. clavatum.A, F and I are sorocarps; B and K, cell aggregations; C, sorophores; D, G and L, spores; E, myxamoebae; H, sorophore tip; J, sorophore base. Bars = (A, K) 1 mm; (B) 0.5 mm; (C, D, G, H, J, L) 10 µm; (E) 15µm; (F, I) 3 mm.