Bibliographic Detail

Carbonell-Moore, M.C., 1994

Reference:
Carbonell-Moore, M.C. (1994). On the taxonomy of the family Podolampaceae Lindemann (Dinophyceae) with descriptions of three new genera. Review of Palaeobotany and Palynology 84: 73-99.

Abstract:
Dinoflagellate cells from the family Podolampadaceae from multiple locations in the world's oceans, were studied under the scanning electron microscope. The plate formula of the family is redefined based upon plate homology comparisons between the hypotheca of the closely related Peridinioid genus Diplopsalis Bergh and the hypotheca of different Podolampadacean genera. As in Diplopsalis, five postcingular plates and only one antapical plate are found in the hypotheca of the Podolampadaceans. The Podolampadacean plate formula may be written as: Po Pt X 3 la 5 3C 45S 45 1, where Pt refers to the cover plate in the apical pore complex (APC). Three new genera (Mysticella, Gaarderia and Heterobractum) are proposed on the basis of the apical pore types, cell compression and/or cell bilateral asymmetry. A new combination for the former Blepharocysta striata Schütt is proposed as Mysticella striata (Schütt) Carbonell-Moore, comb. nov. Three types of APC were found in the Podolampadaceans: 1. Type 1: Pore plate with ridges and pores; cover plate with only a small protuberance; this apical pore is typical of Blepharocysta. 2. Type 2: Pores but no ridges on the pore plate; cover plate with a small spine. Lissodinium Matzenauer, emend. Carbonell-Moore and Mysticella Carbonell-Moore, gen. nov. illustrate this type of apical pore. 3. Type 3: Pore plate as in Type 2. Cover and canal plate with a continous pronounced ridge. Gaarderia Carbonell-Moore, gen. nov. and Heterobractum Carbonell-Moore, gen. nov. represent this kind of apical pore. A broad range in cell bilateral asymmetry and cell compression resulting in a pronounced cell distortion was evident in these dinoflagellates. In Blepharocysta there is almost no cell compression, while most species of Podolampas are dorso-ventrally compressed. Cells of Mysticella species may present no compression or may be slightly dorso-ventrally compressed. Lissodinium is laterally compressed and shows the highest degree of bilateral symmetry within the family. A unique bilateral plate asymmetry (and no cell compression) is observed in Heterobractum Carbonell-Moore, gen. nov. A pronounced cell distortion is found in the different species of Gaarderia Carbonell-Moore, gen. nov. Of all plate series, the cingular series show the most variation in both development (narrow to very wide) and relative plate size within the same series. Zygotic forms as evidence of a sexual life cycle were observed in some species. An evolutionary trend is briefly discussed.