Xaniopyramis

{{Short description|Genus of horseshoe crab relatives}}

{{Taxobox

| fossil_range=early Carboniferous

| image =

| regnum = Animalia

| phylum = Arthropoda

| subphylum = Chelicerata

| classis = Xiphosura

| ordo = Xiphosurida

| subordo = Limulina

| familia = Moravuridae

| genus = Xaniopyramis

| genus_authority = Siveter & Selden, 1987{{cite journal|doi=10.1111/j.1502-3931.1987.tb02060.x | volume=20 | title=The origin of the limuloids | year=2007 | journal=Lethaia | pages=383–392 | last1 = Selden | first1 = Paul A.| issue=4 }}

|subdivision_ranks = Species

| subdivision =

}}

Xaniopyramis is an extinct genus of xiphosuran, related to the modern horseshoe crab. It lived in the early Carboniferous.