A survey of chromosome complements in the Tetranychidae

Abstract

Abstract The chromosome numbers have been assessed for 31 bisexual species of 14 different genera of the Tetranychidae, bringing the total of karyotyped species in this family to 109. The taxonomic significance of karyotype information is discussed. A haploid number of n=5 occurs in Neotrichobia arizonensis, Eotetranychus fremonti and E. gambelii; of n=4 in Marainobia spec., Schizonobia spec.,Hystrichonychus gracilipes, H. sidae, Oligonychus grewiae, O. stickneyi and O. neoplegas ; of n=3 in Pseudobryobia drummondi, Paraplonobia coldeniae, Eotetranychus falcatus, Mononychellus siccus, M. lippiae, Schizotetranychus eremophilus, Mixonychus dulcis, Oligonychus coniferarum, O. subnudus, 0. gambelii, Tetranychus desertorum, T. evansi and T. polys ; of n=2 in Bryobia geigeriae, Aponychus spec., Eotetranychus yumensis, E. malvastris, E. lewisi, Oligonychus intermedius, O. punicae and O. propetes. All species exhibit haplo-diploidy.