Echinothrix diadema

Echinothrix diadema

::"Several species of sea urchin are commonly called Diadema urchins, go here for a discussion"

Taxobox
name = Diadema urchin


image_width = 250px
regnum = Animalia
phylum = Echinodermata
classis = Echinoidea
subclassis = Euechinoidea
superordo = Diadematacea
ordo = Diadematoida
familia = Diadematidae
genus = "Echinothrix"
genus_authority = Peters, 1853
species = "E. diadema"
binomial = "Echinothrix diadema"
binomial_authority = Linnaeus, 1758

The Diadema Urchin "(Echinothrix diadema)" is a long spined urchin, with a diameter of about 8 cm. It is generally black in colour, and always dark. The spines are closed at the tip; the anal sac is spotted light and dark.

It is found in the Indo-Pacific region, in dark reef. It is active at night, hiding in crevices or under rocks at night.

It hosts commensal species like the shrimp "Stegopontonia commensalis". "Saron marmoratus" stays close for protection, like many fish of the families "Apogonidae" (cardinal fish) and "Aeoliscidae" (razor fish).

The difference with "Echinothrix calamaris" is that spines are not banded. The more similar species is "Diadema setosum", having longer spines, the distinguishing feature being the colour of the anal sac.


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  • Diadema urchin — Echinothrix diadema Diadema urchin can refer to several species of sea urchin. The most common urchins to take this name are Diadema setosum and Echinothrix diadema. Both species are commonly found in the Indo Pacific region, in water up to 70m… …   Wikipedia

  • Echinothrix — Taxobox name = Echinothrix urchins image width = 250px image caption = Echinothrix diadema regnum = Animalia phylum = Echinodermata classis = Echinoidea ordo = Diadematoida familia = Diadematidae genus = Echinothrix genus authority = Peters, 1853 …   Wikipedia

  • Echinothrix calamaris — Taxobox name = Double spined urchin regnum = Animalia phylum = Echinodermata classis = Echinoidea subclassis = Euechinoidea superordo = Diadematacea ordo = Diadematoida familia = Diadematidae genus = Echinothrix genus authority = Peters, 1853… …   Wikipedia

  • Diadema setosum — ? Diadema setosum Морской ёж Diadema set …   Википедия

  • Diadema setosum — Diadema setosum, banded spines color morph. Scientific classification Kingdom: Animali …   Wikipedia

  • Diadematidae — Euechinoidea Diadema setosum …   Wikipédia en Français

  • Diadem-Seeigel — Diademseeigel Diademseeigel (Diadema setosum) Systematik Stamm: Stachelhäuter (Echinodermata) …   Deutsch Wikipedia

  • Diadematidae — Diademseeigel Diademseeigel (Diadema setosum) Systematik Stamm: Stachelhäuter (Echinodermata) …   Deutsch Wikipedia

  • Diadematidae — Echinothrix diadema Scientific classification Kingdom: Animalia …   Wikipedia

  • Diademseeigel — (Diadema setosum) Systematik Stamm: Stachelhäuter (Echinodermata) Klasse …   Deutsch Wikipedia

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