Overview

Comprehensive Description

Description

 Modiolarca tumida is a small bivalve up to 2 cm in length. The valves of the shell are equal in size, shape and depth and both have a swollen, plump appearance. The shell is broadly oval in outline. The shell is yellow with ribs in the anterior and posterior regions. The periostracum is light green, with blotches of brown, red-brown or purple. The margin of the shell is smooth but crenulate where it meets the ribs. The inside of the shell is bright white.
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Source: Marine Life Information Network

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Ecology

Habitat

Depth range based on 3 specimens in 1 taxon.
Water temperature and chemistry ranges based on 1 sample.

Environmental ranges
  Depth range (m): 76.25 - 115
  Temperature range (°C): 7.037 - 7.037
  Nitrate (umol/L): 9.273 - 9.273
  Salinity (PPS): 35.034 - 35.034
  Oxygen (ml/l): 6.186 - 6.186
  Phosphate (umol/l): 0.759 - 0.759
  Silicate (umol/l): 4.842 - 4.842

Graphical representation

Depth range (m): 76.25 - 115
 
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Depth range based on 32 specimens in 1 taxon.
Water temperature and chemistry ranges based on 7 samples.

Environmental ranges
  Depth range (m): 0 - 79
  Temperature range (°C): 6.506 - 10.036
  Nitrate (umol/L): 2.055 - 7.641
  Salinity (PPS): 34.143 - 35.024
  Oxygen (ml/l): 5.952 - 6.440
  Phosphate (umol/l): 0.399 - 0.671
  Silicate (umol/l): 2.459 - 5.452

Graphical representation

Depth range (m): 0 - 79

Temperature range (°C): 6.506 - 10.036

Nitrate (umol/L): 2.055 - 7.641

Salinity (PPS): 34.143 - 35.024

Oxygen (ml/l): 5.952 - 6.440

Phosphate (umol/l): 0.399 - 0.671

Silicate (umol/l): 2.459 - 5.452
 
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 On rocky shores in the low intertidal, buried in the test of Ascidia mentula or Ascidiella aspersa, in and amongst kelp holdfasts, under rocks and stones.
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Source: Marine Life Information Network

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