description Gracilechinus affinis Overview
Gracilechinus affinis is a living marine sea urchin in the family Echinidae. It was originally described as Echinus affinis by Mortensen in 1903 and is now accepted in the genus Gracilechinus, with Echinus affinis retained as the original combination. The species is associated with the Atlantic deep sea, and records place it at depths of roughly 1,750 to 2,450 metres. It is intended for zoological and marine-biodiversity references rather than general aquarium identification.
help Gracilechinus affinis FAQ
What is Gracilechinus affinis?
Gracilechinus affinis is a living marine sea urchin in the family Echinidae. It is a biological species, not a fossil or a common aquarium product.
What was the original scientific name of Gracilechinus affinis?
Mortensen originally described it as Echinus affinis in 1903. Echinus affinis remains the original combination used in its taxonomic history.
Why is the species name Gracilechinus affinis used today?
The species is now accepted in the genus Gracilechinus. Taxonomic revisions can move a species to a different genus while preserving the specific name affinis.
What type of animal is Gracilechinus affinis?
It is a marine echinoderm, specifically a sea urchin in Echinidae. Like other sea urchins, it is a spiny relative of sea stars and brittle stars.
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