Overview

Brief Summary

Astropyga - overview

Astropyga is a genus of tropical sea urchins.

These echinoids are found in shallow waters throughout all the tropics, as well in the Atlantic (A. magnifica) as in the Indian (A. radiata) and Pacific oceans (A. pulvinata). They usually live at snorkelling depths in coral ecosystems, but can be found at more than 30m deep ; they can be very common in seagrass beds. They are mainly algae grazers, but can eat a wide variety of foods.

These species all share a distinctive shape, with a flattened test and rather long, hollow and slender spines. They all wear bright colors, usually bright red and white (sometimes black), with a distinctive star-shaped naked pattern on the aboral surface, around the anus ("astro-pyga" means "star-shaped anus"), ponctuated by iridophores (lines of bright blue dots). The anal papilla is rather big and rounded. Young specimens have banded spines, but some mature specimens can still be so.

Some of their spines are venomous and painful, but not really dangerous.

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Ecology

Habitat

Depth range based on 55 specimens in 4 taxa.
Water temperature and chemistry ranges based on 25 samples.

Environmental ranges
  Depth range (m): 11 - 252
  Temperature range (°C): 19.787 - 27.265
  Nitrate (umol/L): 0.311 - 7.979
  Salinity (PPS): 34.673 - 36.401
  Oxygen (ml/l): 4.230 - 4.820
  Phosphate (umol/l): 0.029 - 1.320
  Silicate (umol/l): 0.380 - 18.854

Graphical representation

Depth range (m): 11 - 252

Temperature range (°C): 19.787 - 27.265

Nitrate (umol/L): 0.311 - 7.979

Salinity (PPS): 34.673 - 36.401

Oxygen (ml/l): 4.230 - 4.820

Phosphate (umol/l): 0.029 - 1.320

Silicate (umol/l): 0.380 - 18.854
 
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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage

Barcode of Life Data Systems (BOLD) Stats
                                        
Specimen Records:11Public Records:7
Specimens with Sequences:11Public Species:4
Specimens with Barcodes:6Public BINs:2
Species:5         
Species With Barcodes:4         
          
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Barcode data

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Wikipedia

Astropyga

Astropyga is a genus of sea urchins of the Family Diadematidae. Their armour is covered with spines. Astropyga was first scientifically described in 1855 by John Edward Gray.[1][2]

Species[edit]

According to World Register of Marine Species:

References[edit]

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