| Popis: |
The classification used in this work is essentially that of Loeblich & Tappan (1964, 1974) as it is the best known and most easily used. Nevertheless we often find ourselves in favor of a generic concept which is somewhat more conservative than that proposed by Loeblich and Tappan. We think that the proliferation of taxa (even at the generic level) as reflected in Loeblich & Tappan (op. cit.) and followed by many other workers, is prejudicial to the practical interests of the science (Boltovskoy, 1965d). Consequently, we will not always rigidly follow the Loeblich and Tappan classification, but will sometimes use other generic names, either to maintain a somewhat broader interpretation, or to follow the principle of conservation rather than that of priority (Todd, 1963; Le Calvez, 1969; Boltovskoy & Wright, 1976). Insofar as species identification is concerned we have expended a great deal of energy, not only at the microscope, but also in searching the literature and examining original type material, to be as precise and faithful to the original descriptions as possible. |
