Cephalodiscus calciformis

{{Short description|Species of hemichordate in the pterobranchian class}}

{{Taxobox

| image =

| image_caption =

| status =

| regnum = Animalia

| phylum = Hemichordata

| classis = Pterobranchia

| ordo = Cephalodiscida

| familia = Cephalodiscidae

| genus = Cephalodiscus

| species = C. calciformis

| binomial = Cephalodiscus calciformis

| binomial_authority = Emig, 1977Emig, C.C. (1977). On a new species of Cephalodiscus, C. (C.) caliciformis sp. nov. (Hemichordata, Pterobranchia), collected off Madagascar. Bulletin du Museum National d'Histoire Naturelle, Paris. 3E, Zool 493.

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}}

Cephalodiscus calciformis is a sessile hemichordate belonging to the order Cephalodiscida.{{cite WoRMS |author=Swalla, B.J. |author2=van der Land, J. |year=2020 |title=Cephalodiscus calciformis |id=266744 |access-date=September 17, 2020 |db=Hemichordata World Database}} It is the only pterobranch species with funnel-shaped tubaria.{{cite book|last=Maletz|first=Jörg|title=Graptolite Paleobiology|year=2017|publisher=Wiley-Blackwell|url=https://www.wiley.com/en-us/Graptolite+Paleobiology-p-9781118515617|isbn=9781118515617}}