Astraea Klotzsch

In a parallel of Darwin's finches on the Galapagos Islands, the Partula snails are known for the diversification of species that has occurred across the range of islands upon which they live. They vary in size, shape and colouration, with grey to brown spiral shells sometimes marked with white. Their bodies are pale to dark brown (2).

Found only on islands in the Pacific Ocean, ranging over 8,000 km from Palau to the Society Islands in French Polynesia (3).

Depth range based on 28 specimens in 14 taxa.
Water temperature and chemistry ranges based on 12 samples.

Environmental ranges
  Depth range (m): 1.5 - 96
  Temperature range (°C): 10.915 - 28.496
  Nitrate (umol/L): 0.117 - 9.954
  Salinity (PPS): 34.135 - 37.139
  Oxygen (ml/l): 4.349 - 5.836
  Phosphate (umol/l): 0.076 - 0.831
  Silicate (umol/l): 1.089 - 7.971

Graphical representation

Depth range (m): 1.5 - 96

Temperature range (°C): 10.915 - 28.496

Nitrate (umol/L): 0.117 - 9.954

Salinity (PPS): 34.135 - 37.139

Oxygen (ml/l): 4.349 - 5.836

Phosphate (umol/l): 0.076 - 0.831

Silicate (umol/l): 1.089 - 7.971
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

Depth range based on 11 specimens in 3 taxa.
Water temperature and chemistry ranges based on 2 samples.

Environmental ranges
  Depth range (m): 4.5 - 99
  Temperature range (°C): 16.368 - 17.167
  Nitrate (umol/L): 0.926 - 1.338
  Salinity (PPS): 37.537 - 37.565
  Oxygen (ml/l): 5.289 - 5.465
  Phosphate (umol/l): 0.091 - 0.112
  Silicate (umol/l): 2.903 - 3.150

Graphical representation

Depth range (m): 4.5 - 99

Temperature range (°C): 16.368 - 17.167

Nitrate (umol/L): 0.926 - 1.338

Salinity (PPS): 37.537 - 37.565

Oxygen (ml/l): 5.289 - 5.465

Phosphate (umol/l): 0.091 - 0.112

Silicate (umol/l): 2.903 - 3.150
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.