Xanadoses nielseni

Xaniopyramis

(EXTINCT)

Xanthocephalus xanthocephalus

(Yellow-headed Blackbird)

Xanthocorynus

Xanthodermus

Xanthodisca

X-ariel

X-astrape

X-rega

X-vibius

Xantholinini

Xantholinus

X-(Afrolinus)

X-(Calolinus)

X-(Helicophallus)

X-(Heterolius)

X-(Idiolinus)

X-(Meneidophallus)

X-(Milichilinus)

X-(Neoleptophallus)

X-(Paracyclinus)

X-(Polydontophallus)

X-(Purrolinus)

X-(Stenophallus)

X-(Tetralinus)

X-(Toxophallus)

X-(Typhlolinus)

X-(Xantholinus)

Xanthomantis

X-(Oligocanthopus) ornata

X-(Pliacanthopus) mantispoides

X-(Xanthomantis)

XX-bimaculata

XX-flava

XX-malayana

Xanthoneura

Xanthonomus

Xanthophius

Xanthophytes

Xanthopsar flavus

(Saffron-cowled Blackbird)

Xanthopygina

Xanthopygoides

Xanthopygus

Xanthorrhoeaceae

Xanthosphaera

Xanthotaenia busiris

Xarifiidae

Xenadiastus

Xenalluaudia

Xenandra

X-agria

X-ahrenholzi

X-desora

X-heliodes

X-helius

X-mielkei

X-nigrivenata

X-pelopia

X-poliotactis

X-vulcanalis

Xenanthobium

Xenasteiidae

Xenastenoglossa

Xenaster

Xenelytron

(EXTINCT)

Xeniades

X-chalestra

X-ethoda

X-orchamus

X-victoria

Xenicopoda

Xenidus

Xenion

Xenister

Xenistusa

Xenobasilewskyia

Xenobatrachus

Xenobatrisus

Xenobesuchetia

Xenobiota

Xenobius

Xenobryaxis

Xenobythus

Xenocelisia

Xenocliarthrus

Xenococcus

Xenocoelomatidae

Xenoconurus

Xenodusa

Xenogaster

Xenoglaux loweryi

(Long-whiskered Owlet)

Xenogmocerodes

Xenogyna

Xenogynidia

Xenohyus

(EXTINCT)

Xenokrohnia sorbei

Xenolejeunea

Xenoleleupia

Xenomachadoella

Xenomedon

Xenomma

Xenomussardia

Xenomyrmex

X-floridanus

X-panamanus

X-stollii

Xenonychus

(2 species)

Xenopelta

Xenoperdix udzungwensis

(Udzungwa Forest Partridge)

Xenophanes

Xenophilothis

(1 species)

Xenophoroidea

Xenophyophores

(large marine amoebae)

Xenopteryx

Xenopus

Xenopus pascuali

(EXTINCT)

"Xenopus" romeri

Xenopygia

Xenopygiella

Xenopygus

Xenorhina

Xenosauridae

Xenosiphon

0(incertae sedis)

Xenosiren

(EXTINCT)

Xenotmesiphorus

Xenotrecha huebneri

Xenotrichulidae

Xenotyphlus

Xenozorotypus burmiticus

(EXTINCT) (Cretaceous)

Xerhius

Xerinae

Xerini

(African and long-clawed ground squirrels)

Xerolobium

Xerolycosa

Xeromelissinae

Xeromphalina

Xeromys

Xeronemataceae

Xerophygus

Xerosaprinus

(~25 species)

Xerus

Xestipyge

Xestoblatta

Xestoleberididae

Xestolinus

Xestonotus

Xesturida

Xhoaphryx lemeei

Xhosores

Xiaitermes

Xipapillomavirus

Xiphinematobacter

Xiphobythus

Xiphocentronidae

Xiphodontidae

(EXTINCT)

Xiphosura

(horseshoe crabs)

Xiphosurida

Xiphozelinae

Xiphydrioidea

Xispia

X-quadrata

X-satyrus

Xiushuiaspis

(EXTINCT)

Xosablatta

Xosaia

Xotidium

Xybarida

Xybaris

Xyelinae

Xylanibacterium

Xylanimonas

Xylion

Xylionopsis

Xylionulus

Xyliphius

X-barbatus

de Armburu & Armburu, 1962

X-kryptos

Taphorn & Lilyestrom, 1983

X-lepturus

Orcés, 1962

X-lombarderoi

Risso & Risso 1964

X-magdalenae

Eigenmann 1912a

X-melanopterus

Orcés, 1962

Xylobiops

Xyloblaptus

Xylobosca

Xylochomitermes

Xylocis

Xylocopinae

(carpenter bees)

Xylocopini

Xylodectes

Xylodeleis

Xylodromus

Xylodrypta

Xylogenes

Xylomedes

Xylomeira

Xylomyidae

Xylonaeus

Xylopertha

Xyloperthella

Xyloperthini

Xyloperthodes

Xylophagidae

Xylophorus

Xyloprista

Xylopsocus

Xylostega

Xylostiba

Xylothrips

Xylotillus

Xynia lilacina

Xynia lithosina

Xynias

Xyphiopsyllidae

Xyphosternum

(EXTINCT)

Xyronotidae

Xysticus

Xystosomina

Xystosomus

X-convexus

X-impressifrons

X-inflatus

X-laevimicans

X-laevis

X-niger

X-paralaevis

X-tholus

X-turgidus

Xystropeltis

X-lankesteri

X-meridionalis

X-quadrilobata

Xyts