Phylogeny of deep-sea calcareous trochospiral benthic foraminifera: evolution and diversification

摘要

The phylogeny, evolutionary trends, and timing of diversification of deep-sea organisms remain largely unknown. The purpose of this paper is to highlight the taxonomy and phylogeny of deep-sea calcareous trochospiral benthic foraminiferal genera which mainly inhabit the top few centimeters of sea floor sediment. This report describes the phylogeny of 19 genera including five new genera and 17 new species, and a new taxonomic classification at the family level. The classification of families and the phylogeny of genera based on morphological intergradation differs fundamentally from previous taxonomic schemes which used radial-granular texture as one of the important categories for suprageneric classification.