Arenigiphyllum

{{Short description|Genus of algae}}

{{automatic taxobox

| fossil_range = {{fossil range|Ordovician}}

| taxon = Arenigiphyllum

| authority = Riding et al. 1998

| subdivision_ranks = Species

| subdivision = {{bold species list

| A. crustosum |Riding et al. 1998 (type)}}

}}

Arenigiphyllum is a genus of alga from the Ordovician that falls in the coralline stem group.{{Cite journal | last1 = Xiao | first1 = S. | last2 = Knoll | first2 = A. H. | last3 = Yuan | first3 = X. | last4 = Pueschel | first4 = C. M. | title = Phosphatized multicellular algae in the Neoproterozoic Doushantuo Formation, China, and the early evolution of florideophyte red algae | journal = American Journal of Botany | volume = 91 | issue = 2 | pages = 214–227 | year = 2004 | pmid = 21653378 | doi = 10.3732/ajb.91.2.214| doi-access = free }} Only its vegetative anatomy is known.{{cite journal

| author1 = Riding, R

| author2 = Cope, JCW

| author3 = Taylor, PD

| title = A coralline-like red alga from the Lower Ordovician of Wales

| url = http://palaeontology.palass-pubs.org/pdf/Vol%2041/Pages%201069-1076.pdf

| journal = Palaeontology

| volume = 41

| issue = 5

| pages = 1069–1076

| publisher = London: Palaeontological Association.

| year = 1998

| access-date = 2010-11-19

| archive-date = 2012-03-09

| archive-url = https://web.archive.org/web/20120309062740/http://palaeontology.palass-pubs.org/pdf/Vol%2041/Pages%201069-1076.pdf

| url-status = usurped

}}