By D. Dudley Williams (auth.), John F. Flannagan, K. Eric Marshall (eds.)
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Extra info for Advances in Ephemeroptera Biology
Phylogenetic diagram of most basal primitive furcation within the recent Leptophlebiidae (see Table 1 for character states). The Atalophlebiinae are composed of a good number of primitive to highly specialized phyletic lineages. All of these lineages represent distinct assemblages of genera and each lineage occurs over more than one continent. While a higher classification should express various phylogenetic entities, recognition of each of these lineages as subfamilies would lead to extreme fragmentation at the subfamilial level.
ZUSSAMENFASSUNG 1m sudlichen Sudamerika kennt man zwolf an Kalte gewohnte Leptophlebiiden Gattungen.
Detailed criteria must be imposed if such studies are to be consistent. Our phylogenies are based on the possession of several, presumed derived, character states for each monophyletic daughter line. The most primitive furcation in the evolution of the extant Leptophlebiidae is discussed. Based on this phylogeny, the need for and usefulness of subfamilies and tribes within the family are also discussed. A new subfamily: the Atalophlebiinae is proposed. INTRODUCTION AND t1ETHODS In 1960, while a graduate student at the University of Utah, I began to revise the generic classification of the Leptophlebiidae on a worldwide basis.