| sperm structure and phylogeny of astigmata. | the astigmata, a large and variable group, is still a subject of taxonomic dispute. particularly, their origin from ancestors of the lower oribatid mites (e.g., malaconothroidea) seems well documented by many lines of evidence. the structure of spermatozoa has been successfully applied to phylogenetic investigations in many animal groups. the aim of our study was to provide new data on spermatozoon structure in astigmata and to consider its appropriateness in phylogenetic studies. the study reve ... | 2005 | 16086405 |