Eodictyonella is a genus of rhynchonelliform brachiopods belonging to the extinct class Chileata. It is characterised by a non-strophic shell covered by a net-like ornament (Greek dictyon, a net). Like in most chileates, the perforation in the umbonal region of the ventral valve is covered by a colleplax. Eodictyonella is known from the Ordovician to the Lower Devonian.[1]

Eodictyonella
Temporal range: Late Ordovician
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Brachiopoda
Class: Chileata
Order: Dictyonellida
Family: Eichwaldiidae
Genus: Eodictyonella
Synonyms
  • Dictyonella Hall 1868

It had initially been described as Dictyonella Hall, 1868; however, this name proved to be a younger homonym of Dictyonella Schmidt, 1868, a sponge, so has been replaced by Eodictyonella Wright, 1994.[2]

Eodictyonella belongs to the family Eichwaldiidae Schuchert, 1893 and to the order Dictyonellida Cooper, 1956. The latter is based on Eodictyonella under its former name. However, Dictyonellidae is a family of sponges.

Isogramma[1] belongs to the same order, but its external aspect is rather different from Eodictyonella; Isogramma has a strophic shell.[1]

References

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  1. ^ a b c Chen, Z.Q; Shi, G.R (2006). "Isogramma Meek and Worthen, 1870 (Dictyonellida, Brachiopoda) from the upper Palaeozoic of East Asia: Implications for biogeography and evolutionary trends". Journal of Asian Earth Sciences. 26 (3–4): 405. Bibcode:2006JAESc..26..405C. doi:10.1016/j.jseaes.2005.04.002.
  2. ^ Wright, Anthony D (2015). "Eodictyonella, a new name for Dictyonella Hall, 1868, not Dictyonella Schmidt, 1868". Journal of Paleontology. 68 (4): 908. doi:10.1017/S0022336000026378.