FIGURE 11 in New dictyostelid cellular slime molds from South Africa

FIGURE 11. Features of Raperostelium crispum (Eden 2). A. Asymmetrical small aggregation with typical curled, unfinished streams, curled streams anastomose soon after leaving clear areas, sometimes streams fork at acute angles and give the appearance of drastic change of direction, stream diameters vary from thin to very ample at any point of their length, leaving minute masses of streamed pseudoplasmodia progressively unconnected, the feeding front is conspicuous and continuously groups of myxamoebae migrate to larger streams or pseudoplasmodia (above), larger streamed pseudoplasmodia fragment at the periphery, leaving behind a number of pseudoplasmodial masses, which become irregular mounds, the entrance of myxamoebae is constant in the smaller mounds (below), B. Early (left) and late (right) sorogens in clusters, two of them rise up with a coremiform habit (right), the curled streamed basal pseudoplasmodia persist when mounds are not formed, C. Three models of basal section of late sorogens: with striated sheath (left) and with an ample slime mass (center, right), all with halos of myxamoebae, D. Young solitary unbranched sorocarp, the sorophore consists of one tier of cells, untapered, a tiny blob tightly joined to the base is a very early sorogen, almost round, two or three clouds of myxamoebae are the relicts of streams, E. Tightly clustered sorocarps with the typical curled streams at their bases, these formations are several times curved and sometimes parallel with each other, sorophores are curved, broken, sori globose, of different diameters, that may slide down; bases are also covered by lobed slime, masses of rising pseudoplasmodia settle at different points of the sorophore and form small to large branches at acute or right angles, F. Four models of bases: multicellular clavate (above, left), three bases of one tier of cells in a cluster with their curved termina in contact and resting on a dense darker slime mass (above, right), a multicellular base with protruding cells, with strong crampon of sheath (left, below), a base with a bifid terminus on a cushion of darker, dense slime and some undifferentiated cells (below, right), G. Very thin terminal segments with amorphous flexuous capitate cells (left) and piliform cells (right), in most cases with sticky slime, H. Myxamoebae, I. Small short elliptical oblong spores with consolidated granules at the poles and subpolar, heterogeneous content with small granules and vacuoles within the spore body, J. Spore case in two longitudinal halves. Bars: A–E = 150 μm, F–G = 15 μm, H = 10 μm, I–J = 5 μm.