Gracilechinus is a genus of sea urchins in the family Echinidae.
Gracilechinus | |
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Gracilechinus acutus at the Biodiversarium of the Observatoire océanologique de Banyuls-sur-Mer | |
Scientific classification ![]() | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Echinodermata |
Class: | Echinoidea |
Order: | Camarodonta |
Family: | Echinidae |
Genus: | Gracilechinus Fell & Pawson, 1966 |
Species | |
See text |
Description and characteristics
editThe species in this genus are regular sea urchins, with a rounded test, bearing the anus at the top and the mouth at the bottom. They are extremely similar to species in the genus Echinus, but are differentiated by a primary tubercle on every interambulacral plate.[1]
Most species in this genus are abyssal, and live in the North Atlantic or close cold seas.
Species
editSpecies in this genus include:[2]
Image | Scientific name | Distribution |
---|---|---|
Gracilechinus acutus (Lamarck, 1816) | Europe (Mediterranean and Atlantic) | |
Gracilechinus affinis (Mortensen, 1903) | center Atlantic | |
Gracilechinus alexandri (Döderlein & Koren, 1883) | Northern Atlantic | |
Gracilechinus atlanticus (Mortensen, 1903) | Atlantic | |
Gracilechinus elegans (Düben & Koren, 1844) | North-east Atlantic | |
Gracilechinus gracilis (Agassiz, 1869) | Caribbean | |
Gracilechinus lucidus (Döderlein, 1885) | North-west Pacific | |
Gracilechinus stenoporus (Mortensen, 1942) | South Africa |
References
edit- ^ "Gracilechinus". Echinoid Directory.
- ^ Andreas Kroh (2015), Gracilechinus in Kroh, A. & Mooi, R. (2015), World Echinoidea Database.