. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 408 H. FURLIYA ET AL. a6B,§Bi:. 6B;; . 5B"2 4B'2 SBi1 6A'i: • _ ^- , C A 12'. 5B 5B'1: SB-' 5B:2 5B Figure!. The late-stage vermiform embryos of four species of dicyemids. Scale bar represents 10 ^m. Cilia are omitted. See text for explanations of cell division notations. Other abbreviations: AG. agamete: AX, axial cell; DP. diapolar cell; MP. metapolar cell; PR, propolar cell; PP. parapolar cell; S. syncytium; UP. uropolar cell. Microcvema vespa: (a) a late-stage embryo (sagittal optical section)—note an agamete (5a~)
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 408 H. FURLIYA ET AL. a6B,§Bi:. 6B;; . 5B"2 4B'2 SBi1 6A'i: • _ ^- , C A 12'. 5B 5B'1: SB-' 5B:2 5B Figure!. The late-stage vermiform embryos of four species of dicyemids. Scale bar represents 10 ^m. Cilia are omitted. See text for explanations of cell division notations. Other abbreviations: AG. agamete: AX, axial cell; DP. diapolar cell; MP. metapolar cell; PR, propolar cell; PP. parapolar cell; S. syncytium; UP. uropolar cell. Microcvema vespa: (a) a late-stage embryo (sagittal optical section)—note an agamete (5a~) in the cytoplasm of an axial cell (5a'l; (b) a late-stage embryo (sagittal optical section); (c) formed embryo (sagittal optical section)—pairs of 6B", 6B'2. and 6B:i cells form a syncytium (S) that is more conspicuously stained with hematoxylin. Conocyemapolymorpha; (d) a late-stage embryo (sagittal optical section)—note an agamete (6a~) incorporated in the cytoplasm of an axial cell (6a'): (e) a late-stage embryo (lateral view); (f) formed embryo (lateral view)—pairs of 4B" and 5B21 cells form propolar cells (PR) that are more conspicuously stained with hematoxylin. Dicyema apalachiensis: (g) 13-cell stage—note an anaphase figure of 4B': cell and a metaphase figure of 4B12 cell; (h) 15-cell stage—the 5B1" and 5B':i pairs form the propolar cells (PR), while the 5B"2 and 5B'22 pairs form another type of polar cell, the metapolar cell (MP); (I) formed embryo (lateral view)— propolar cells and metapolar cells are more conspicuously stained with hematoxylin. Pseudicyema nakaoi: (j) 22-cell stage—note a metaphase figure in 4B12 cell—the plane of this division, in contrast to the divisions of 4B|: pair (Fig. 2g), are oblique to the anterior-posterior axis, and as the result, cells of the propolar tier alternate with cells of the metapolar tier (see Fig. 2k, 1); (k) a late-stage embryo (lateral view); (I) formed embryo (lateral view)—propola
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
