Diplopsalisとその近縁屬に就て

概要

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The taxonomic relations are still in a state of confusion among some dinoflagellates, such as Peridiniopsis, Diplopsalopsis, Diplopsalopsis, Diplopeltopsis and Entzia: All of them are however. closely allied to each other in the following characteristics: 1) grobular or biconvex lense-shape of the body without spine or horne, 2) a very small spical process provided with an apical pore at the upper end of the body, 3) the circular girdle-furrow surrounding equator of the body, 4) a distinct pterygoid process on the lift margin of the small ventral area, 5) a very small elliptic flagellar pore surrounded with thick wall. The above five genera may, therefore, be arranged in the Diplopsalis Group proposed by the writer. The structural relation of the ventral area may give more convincing diagnoses to these animals than the plate pattern do. and so far as this characteristic concerned the group may be divided into two: the Diplopsalis-type and the Diplopsalopsis-one. Description of a dinoflagellate collected at Asamusi is also given: it is deprived of the apical process and apical pore, being allied to Diplopletopsis in the plate pattern of epitheca and to Diplopsalopsis in structure of the ventral area.
社団法人日本動物学会の論文
1936-10-15