Archaeolithophyllum is a genus of conceptacle-bearing red alga that falls in the coralline stem group. It somewhat resembles Lithophyllum.[1][2]

Temporal range: Pennsylvanian
Scientific classification e
(unranked): Archaeplastida
Division: Rhodophyta
Class: Florideophyceae
Stem group: Corallinales
Family: Archaeolithophyllaceae
Genus: Archaeolithophyllum
Johnson, 1956
  • A. delicatium Johnson, 1956
  • A. missouriensum Johnson, 1956 (type)

As of today, Archaeolithophyllum is the only Palaeozoic coralline to bear clear conceptacles,[3] although the earlier Graticula does bear reproductive structures.[4]

It mineralized using aragonite.[3] Its conceptacles are cone-shaped protrusions that extend outwards from the thallus surface and have a single central opening.[5] It probably encrusted muddy or sandy surfaces.[5]

See alsoEdit


  1. ^ Harlan Johnson, J. (1956). "Archaeolithophyllum, a new genus of Paleozoic Coralline algae". Journal of Paleontology. 30 (1): 53–55. JSTOR 1300377.
  2. ^ Xiao, S.; Knoll, A. H.; Yuan, X.; Pueschel, C. M. (2004). "Phosphatized multicellular algae in the Neoproterozoic Doushantuo Formation, China, and the early evolution of florideophyte red algae". American Journal of Botany. 91 (2): 214–227. doi:10.3732/ajb.91.2.214. PMID 21653378.
  3. ^ a b Cozar, P.; Vachard, D. (2006). "A new Mississippian red alga from south-western Spain". Geobios. 39 (6): 791. doi:10.1016/j.geobios.2005.09.002.
  4. ^ Brooke, C.; Riding, R. (1998). "Ordovician and Silurian coralline red algae". Lethaia. 31 (3): 185. doi:10.1111/j.1502-3931.1998.tb00506.x.
  5. ^ a b John L. Wray (1964). "Archaeolithophyllum, an Abundant Calcareous Alga in Limestones of the Lansing Group (Pennsylvanian), Southeastern Kansas". Kansas Geological Survey Bulletin. 170 (1).