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Overview

Comprehensive Description

Description

Limatula (Antarctolima) ovalis (Thiele, 1912) (Fig. 96)

 

 

Lima (Limatula) ovalis Thiele, 112: 226, pl.17. figs 5a, b; Lamy, 1931: 263.

 

Limatula ovalis: Hedley, 1916: 24; Soot-Ryen, 1951: 20; Powell, 1958: 177; Powell, 1960: 176; Dell, 1964a: 184; Egorova, 1982: 66, figs 289, 290.

 

Limatula (Squamilima) ovalis: Fleming, 1978: 82, fig. 99.

 

 

MATERIAL EXAMINED: Wilkes Stns DAV, TAT.

 

 

DISTRIBUTION: With the provisions noted below, L. ovalis appears to be confined to the region between 38°E and 143°E off the antarctic continent, and does not extend to the Ross Sea.

 

 

REMARKS: Whether all the forms recorded as L. ovalis are conspecific is uncertain. The form is undoubtedly related to L. pygmaea (Philippi) , but reaches only about a quarter the size, and has a relatively narrow, more inflated shell with more numerous, finer radial costae. On the present evidence it must be considered a valid species with a relatively restricted range.”

 

 

(Dell, 1990: 54-55)

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© National Museum of Natural History, Smithsonian Institution

Source: Antarctic Invertebrates Website (NMNH)

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Ecology

Habitat

Depth range based on 10 specimens in 1 taxon.
Water temperature and chemistry ranges based on 2 samples.

Environmental ranges
  Depth range (m): 25 - 560
  Temperature range (°C): -1.388 - -1.145
  Nitrate (umol/L): 29.835 - 31.632
  Salinity (PPS): 34.406 - 34.425
  Oxygen (ml/l): 6.243 - 6.788
  Phosphate (umol/l): 2.058 - 2.104
  Silicate (umol/l): 64.728 - 80.396

Graphical representation

Depth range (m): 25 - 560

Temperature range (°C): -1.388 - -1.145

Nitrate (umol/L): 29.835 - 31.632

Salinity (PPS): 34.406 - 34.425

Oxygen (ml/l): 6.243 - 6.788

Phosphate (umol/l): 2.058 - 2.104

Silicate (umol/l): 64.728 - 80.396
 
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