Vendiamorpha

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Vendiamorpha: easy overview

What is Vendiamorpha?
Vendiamorpha is a small group (a class) of extinct animals from the late Ediacaran period. They belong to the proarticulates, a group of early soft-bodied life forms.

How did they look and move?
Most Vendiamorpha had oval or round bodies made up of many small segments called isomers. The isomers formed two alternating rows along the body, a pattern known as glide reflection symmetry. In many specimens the largest early isomers are fused, creating a headshield-like front.

How did they live?
Some vendiamorphs, such as Vendia and Paravendia, are thought to have carried a simple digestive tube with lateral appendages. Each lateral appendage likely corresponded to one isomer.

Key members (taxonomy)
- Family: Vendiidae
- Genera and notable species:
- Vendia (including Vendia sokolovi and Vendia rachiata)
- Paravendia janae
- Karakhtia nessovi (Karakhtia is unusual and its placement is tentative)
Karakhtia has coarse radial folds around its edge, giving a frilly appearance and sometimes drawing comparisons to Haootia. Its exact classification within Vendiamorpha is debated.

Where are Vendiamorpha fossils found?
All known Vendiamorpha fossils come from Russia, specifically the Ust’ Pinega Formation (Syuzma) and the Onega River region in Arkhangelsk Oblast.

Name note
The term Pseudovendia was used for a fossil imprint similar to Vendia sokolovi. It was once thought to be an arthropod, then a proarticulatan, and later suspected to be a frond-like organism. Today, the poorly preserved holotype of Pseudovendia is generally regarded as a pseudofossil.

See also
- List of Ediacaran genera

In short, Vendiamorpha were small, segmented, early animals from the Ediacaran period, known mainly from a few Russian formations, and they help illuminate the early evolution of multicellular life.