﻿AbstractNineteen new species ofKaraopsare described:K.durrantorumsp. nov.(♂),K.morganoconnellisp. nov.(♀♂),K.joehaenerisp. nov.(♀),K.dalmanyisp. nov.(♀♂),K.garyodwyerisp. nov.(♂),K.dejongisp. nov.(♀♂),K.malumbusp. nov.(♀♂),K.conilurussp. nov.(♂),K.yumbubaarnjisp. nov.(♀♂),K.markharveyisp. nov.(♀♂),K.nitmiluksp. nov.(♀),K.kennerleyorumsp. nov.(♂),K.jawaywaysp. nov.(♀),K.mparntwesp. nov.(♀),K.larapintasp. nov.(♀),K.kwartatumasp. nov.(♂),K.madhawundusp. nov.(♀), andK.mareebasp. nov.(♀). The male ofK.umiidaCrews, 2013 was found to be misidentified and is nowK.conilurussp. nov.Karaopsyindjibarndisyn. nov.is a new synonym ofK.nyiyaparli.SelenopsaustraliensisL. Koch, 1875 is considered a nomen dubium because the holotype is an immature male, and the species previously referred to asK.australiensis(L. Koch, 1875) is here described asK.strayamatesp. nov.(♀♂). The males ofK.marrayagongCrews & Harvey, 2011 andK.banyjimaCrews, 2013 are described for the first time. To manage the growing diversity of the genus, most of the species have been placed in species groups, which are diagnosed. They are the Central Desert group, thestrayamategroup, theravenigroup, thedawaragroup, thefrancesaegroup, the Kimberley group, and the Pilbara-Gascoyne group. New keys are provided to accommodate the new species, and new distribution maps and new records are provided for all species. Diagnoses and descriptions are emended where required. Images of live spiders, many not previously seen alive, and natural history information are also provided.