Source: Wikipedia, the free encyclopedia.
@@40@@
/\WAalenian/
/\WAbereiddian/
/\Wacanthodi/
/\Wacritarch/
/\WActonian/
/\WAksayan/
/\WAlbian/
/\WAmgan/
/\Wammonite/
/\Wammonoid/
/\WAnisian/
/\Wanomalocari/
/\WAptian/
/\WAquitanian/
/\Warchaeocyath/
/\Warchaeopteris/
/\Warchaeopteryx/
/\WArenig/
/\WArtinskian/
/\WAshgill/
/\WAsselian/
/\WAtdabanian/
/\WAyusokkanian/
/\WBajocian/
/\WBarremian/
/\WBartonian/
/\WBashkirian/
/\WBathonian/
/\WBatyrbayan/
/\Wbelemnite/
/\Wbennettitales/
/\WBerriasian/
/\WBlancan/
/\Wblastoid/
/\WBoomerangian/
/\WBotomian/
/\WBurdigalian/
/\Wburgess\sshale/
/\WCaerfai/
/\Wcalamites/
/\WCallovian/
/\WCambrian/
/\WCampanian/
/\WCapitanian/
/\WCaradoc/
/\WCarboniferous/
/\WCarnian/
/\WCassinian/
/\WCautleyan/
/\WCayugan/
/\WCenomanian/
/\Wceratops/
/\WChanghsingian/
/\WChanglangpuan/
/\WChattian/
/\WChazy/
/\WCisuralian/
/\WCisuralian/
/\Wclub\stree/
/\Wcoal(\s|-)age/
/\Wcoelophys/
/\Wcondylarth/
/\WConiacian/
/\Wconodont/
/\Wcoprolite/
/\Wcordaites/
/\WCostonian/
/\Wcreodont/
/\WCretaceous/
/\WCroixan/
/\WCryogenian/
/\Wcycadeoid/
/\Wcynodont/
/\WDanian/
/\WDarriwilian/
/\WDelamaran/
/\WDeming/
/\WDevonian/
/\Wdicrodium/
/\WDolgellian/
/\WDyeran/
/\WEdiacara/
/\WEifelian/
/\WEmsian/
/\WEocene/
/\Weuramerica/
/\Weurypterid/
/\Wextinct/
/\WFamennian/
/\WFestiniogian/
/\WFrasnian/
/\WFurongian/
/\WGaconadian/
/\WGamach/
/\WGelasian/
/\WGivetian/
/\Wgondwana/
/\Wgoniatite/
/\Wgraptolit/
/\WGuadalupian/
/\WGuadalupian/
/\WGzhelian/
/\WHarnagian/
/\WHauterivian/
/\WHettangian/
/\WHirnantian/
/\WIbexian/
/\Wichnite/
/\WIdamean/
/\WInduan/
/\WJurassic/
/\WKasimovian/
/\WKazanian/
/\WKimmeridgian/
/\WKungurian/
/\WLadinian/
/\Wlagerst(a|ä)tte/
/\WLanghian/
/\Wlaurasia/
/\WLenian/
/\Wlepidodendron/
/\WLlandeilian/
/\WLlandeilo/
/\WLlandovery/
/\WLlanvirn/
/\WLochkovian/
/\WLockportian/
/\WLongvillian/
/\WLongwangmioan/
/\WLopingian/
/\WLopingian/
/\WLudlow/
/\WMaastrichtian/
/\Wmacronarian/
/\WMaentwrogian/
/\WMaozhangian/
/\WMarjuman/
/\Wmarrella/
/\WMarshbrookian/
/\WMaysville/
/\Wmeganisoptera/
/\WMeishuchuan/
/\WMerioneth/
/\WMesozoic/
/\WMessinian/
/\WMindyallan/
/\WMiocene/
/\WMississippian/
/\WMontezuman/
/\WMoscovian/
/\WNemakit-Daldynian/
/\WNorian/
/\WOlenekian/
/\WOligocene/
/\WOnnian/
/\WOrdian/
/\WOrdovician/
/\Wornithischian/
/\Wornithopod/
/\Worthocerid/
/\WOxfordian/
/\WPaibian/
/\Wpalaeodictyoptera/
/\WPaleocene/
/\WPaleogene/
/\WPaleozoic/
/\Wpalyno/
/\Wpangaea/
/\Wparareptil/
/\WPayntonian/
/\WPennsylvanian/
/\WPermian/
/\WPiacenzian/
/\Wplacoderm/
/\WPleistocene/
/\WPliensbachian/
/\WPliocene/
/\WPragian/
/\WPriabonian/
/\WPridoli/
/\Wproductid/
/\WProterozoic/
/\Wprotodonata/
/\WPusgillian/
/\WQungzusian/
/\Wradiocarbon/
/\Wradiometric/
/\WRawtheyan/
/\WRhaetian/
/\Wrhizodont/
/\Wrhyniophyt/
/\WRoadian/
/\Wrodinia/
/\Wrudist/
/\WRupelian/
/\WSakian/
/\WSakmarian/
/\WSantonian/
/\Wscale\stree/
/\WScythian/
/\Wsea\smonster/
/\Wsea\sscorpion/
/\WSelandian/
/\WSerpukhovian/
/\WSerravallian/
/\Wsigillaria/
/\WSilurian/
/\WSinemurian/
/\WSoundleyan/
/\Wspiriferid/
/\WSteptoan/
/\Wstrophomenid/
/\WSunwaptan/
/\Wtaphonom/
/\Wtemnospondyl/
/\WTempletonian/
/\WThanetian/
/\Wthyreophor/
/\WTithonian/
/\WToarcian/
/\WTommotian/
/\WTonawandan/
/\WTonian/
/\WTortonian/
/\WTournaisian/
/\WToyonian/
/\WTremadoc/
/\WTremadocian/
/\WTriassic/
/\Wtrilobit/
/\WTuronian/
/\WUfimian/
/\Wuintather/
/\WUndillian/
/\WValanginian/
/\WViséan/
/\WWaucoban/
/\WWenlock/
/\WWordian/
/\WWuchiapingian/
/\WYpresian/
/\WLutetian/
/\WZanclean/
/\WZhungxian/
/\WZuzhuangian/
/fossil/
/ichnolog/
/osaur(us|ians?|oids?|oidea|ids?|idae)?\W/
/pala?eo/
/sauropod/
20 /\Wpala?eontolog/
