Articles on this page are available in 1 other language: Dutch (1) (learn more)

Overview

Brief Summary

Biology

Spawning occurs in June-August. T. tenuis most probably has a pelagic larval stage. Longevity is reported to be about five years. The species usually lies on the left valve, a few centimetres below the sediment-surface. its burrowing depth depends on the tide and exceeds 10 cm at low tide (Tebble, 1966; Wolff, 1973; Fish & Fish, 1989). T. tenuis is a suspension feeder with tendencies to selective deposit-feeding. lt takes vegetable detritus, but diatoms may also occur in the gut. Young flatfish often feed on the tips of the protruding siphons, which are subsequently regenerated (Wolff, 1973; Fish & Fish, 1989). T tenuis is sensitive to low winter temperatures and therefore shows low nurnbers after cold winters (Beukerna, 1979; Beukema & Essink, 1986).
  • Holtmann, S.E.; Groenewold, A.; Schrader, K.H.M.; Asjes, J.; Craeymeersch, J.A.; Duineveld, G.C.A.; van Bostelen, A.J.; van der Meer, J. (1996). Atlas of the zoobenthos of the Dutch continental shelf. Ministry of Transport, Public Works and Water Management: Rijswijk, The Netherlands. ISBN 90-369-4301-9. 243 pp.
Creative Commons Attribution 3.0 (CC BY 3.0)

© WoRMS for SMEBD

Source: World Register of Marine Species

Trusted

Article rating from 0 people

Default rating: 2.5 of 5

The thin tellin is a species which regularly washes ashore. You usually find both valves still attached to one another. The connecting ligament between the two shell halves is namely very strong. The thin tellin is reasonably easy to find on the sand thanks to its pink to orange color. This colorful shellfish usually lives hidden in the sea bottom, where it's difficult to find despite its color. For food and oxygen, it extends its siphons out of the sand and filters the water. The thin tellin closely resembles the Baltic tellin but is more delicate, flatter and lighter.
Creative Commons Attribution Non Commercial 3.0 (CC BY-NC 3.0)

© Copyright Ecomare

Source: Ecomare

Trusted

Article rating from 0 people

Default rating: 2.5 of 5

Comprehensive Description

Description

 The shell is thin and brittle, rounded triangular in shape overall and somewhat flattened. The right valve is slightly larger than the left. The outer surface is shiny with various shades of yellow or pink both inside and outside the shell. The shell is sculptured with fine concentric lines and has a smooth margin. The right valve has two cardinal teeth, and a single anterior and posterior lateral. The left valve has two cardinal teeth and a single small posterior lateral. The pallial sinus is broadly oval with the lower edge fused with the pallial line.This bivalve lies on the left valve buried in the first few centimeters of fine sand and is a suspension feeder. It has a long siphon that extends above the sand when feeding and young flatfishes often feed on the tips of the siphon. However, the bivalve is not killed and the siphon can grow back again.
Creative Commons Attribution Non Commercial Share Alike 3.0 (CC BY-NC-SA 3.0)

©  The Marine Biological Association of the United Kingdom

Source: Marine Life Information Network

Trusted

Article rating from 0 people

Default rating: 2.5 of 5

Distribution

Tellina tenuis was found in both periods in the western near-coastal zone. In addition, the species was also observed in the area of the Hinder Banks, but only in the 1994-2001 period. The frequency of occurrence in both periods was relatively low and the species never reached high density levels (maximum 30 ind./m2).
  • Degraer S., J. Wittoeck, W. Appeltans, K. Cooreman, T. Deprez, H. Hillewaert, K. Hostens, J. Mees, E. Vanden Berghe & M. Vincx (2006). The macrobenthos atlas of the Belgian part of the North Sea. Belgian Science Policy. D/2005/1191/3. ISBN 90-810081-6-1. 164 pp.
Creative Commons Attribution 3.0 (CC BY 3.0)

© WoRMS for SMEBD

Source: World Register of Marine Species

Trusted

Article rating from 0 people

Default rating: 2.5 of 5

T. tenuis does not occur in the offshore parts of the North Sea, but is restricted to a narrow zone along the coast, the Wadden Sea, the Oosterschelde and part of the Westerschelde.
  • Holtmann, S.E.; Groenewold, A.; Schrader, K.H.M.; Asjes, J.; Craeymeersch, J.A.; Duineveld, G.C.A.; van Bostelen, A.J.; van der Meer, J. (1996). Atlas of the zoobenthos of the Dutch continental shelf. Ministry of Transport, Public Works and Water Management: Rijswijk, The Netherlands. ISBN 90-369-4301-9. 243 pp.
Creative Commons Attribution 3.0 (CC BY 3.0)

© WoRMS for SMEBD

Source: World Register of Marine Species

Trusted

Article rating from 0 people

Default rating: 2.5 of 5

Physical Description

Diagnostic Description

Description

A thin, strongly flattened shell with an irregular oval shape. Front edge broadly rounded, back edge tapering in a clear angle. The back is somewhat less acuminate than in the Tellina fabula. The shell surface is practically smooth with only fine growth lines. Measures up to 30 mm long. The colour varies from white with dark colour bands to pinkish red.
  • Degraer S., J. Wittoeck, W. Appeltans, K. Cooreman, T. Deprez, H. Hillewaert, K. Hostens, J. Mees, E. Vanden Berghe & M. Vincx (2006). The macrobenthos atlas of the Belgian part of the North Sea. Belgian Science Policy. D/2005/1191/3. ISBN 90-810081-6-1. 164 pp.
Creative Commons Attribution 3.0 (CC BY 3.0)

© WoRMS for SMEBD

Source: World Register of Marine Species

Trusted

Article rating from 0 people

Default rating: 2.5 of 5

Morphology

A brittle, somewhat flattened shell. The right valve is slightly larger than the left one. lt is nearly oval in outline and measures up to 25 mm in length. The shell is covered with fine concentric lines. The growth stages are clear. The colour is very variable, including white, shades of pink, yellow, and orange, often arranged in distinct bands. The inside of the shell is coloured like the outside, but normally fainter (Tebble, 1966; Fish & Fish, 1989; Hayward & Ryland, 1990).
  • Holtmann, S.E.; Groenewold, A.; Schrader, K.H.M.; Asjes, J.; Craeymeersch, J.A.; Duineveld, G.C.A.; van Bostelen, A.J.; van der Meer, J. (1996). Atlas of the zoobenthos of the Dutch continental shelf. Ministry of Transport, Public Works and Water Management: Rijswijk, The Netherlands. ISBN 90-369-4301-9. 243 pp.
Creative Commons Attribution 3.0 (CC BY 3.0)

© WoRMS for SMEBD

Source: World Register of Marine Species

Trusted

Article rating from 0 people

Default rating: 2.5 of 5

Ecology

Habitat

Tellina tenuis occurs in a wide range of sediments: median grain size of 150 to 500 µm. The main restrictive factor appears to be the mud content: the species only occurs in sediments with a mud content < 20%. The relative occurrence of 10% in sediments with a mud content of 40-50% is considered an outlier and hence seen as unreliable.
  • Degraer S., J. Wittoeck, W. Appeltans, K. Cooreman, T. Deprez, H. Hillewaert, K. Hostens, J. Mees, E. Vanden Berghe & M. Vincx (2006). The macrobenthos atlas of the Belgian part of the North Sea. Belgian Science Policy. D/2005/1191/3. ISBN 90-810081-6-1. 164 pp.
Creative Commons Attribution 3.0 (CC BY 3.0)

© WoRMS for SMEBD

Source: World Register of Marine Species

Trusted

Article rating from 0 people

Default rating: 2.5 of 5

T. tenuis generale inhabits fine, clean sand, with low percentages of silt.
  • Holtmann, S.E.; Groenewold, A.; Schrader, K.H.M.; Asjes, J.; Craeymeersch, J.A.; Duineveld, G.C.A.; van Bostelen, A.J.; van der Meer, J. (1996). Atlas of the zoobenthos of the Dutch continental shelf. Ministry of Transport, Public Works and Water Management: Rijswijk, The Netherlands. ISBN 90-369-4301-9. 243 pp.
Creative Commons Attribution 3.0 (CC BY 3.0)

© WoRMS for SMEBD

Source: World Register of Marine Species

Trusted

Article rating from 0 people

Default rating: 2.5 of 5

Depth range based on 803 specimens in 1 taxon.
Water temperature and chemistry ranges based on 76 samples.

Environmental ranges
  Depth range (m): 0 - 51.5
  Temperature range (°C): 8.055 - 15.419
  Nitrate (umol/L): 0.267 - 12.040
  Salinity (PPS): 32.851 - 38.605
  Oxygen (ml/l): 5.576 - 6.605
  Phosphate (umol/l): 0.088 - 0.653
  Silicate (umol/l): 1.583 - 7.673

Graphical representation

Depth range (m): 0 - 51.5

Temperature range (°C): 8.055 - 15.419

Nitrate (umol/L): 0.267 - 12.040

Salinity (PPS): 32.851 - 38.605

Oxygen (ml/l): 5.576 - 6.605

Phosphate (umol/l): 0.088 - 0.653

Silicate (umol/l): 1.583 - 7.673
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

Trusted

Article rating from 0 people

Default rating: 2.5 of 5

 This species is found in fine sand from the middle of the shore to the shallow sublittoral. It buries to about 5-12 cm in the sand.
Creative Commons Attribution Non Commercial Share Alike 3.0 (CC BY-NC-SA 3.0)

©  The Marine Biological Association of the United Kingdom

Source: Marine Life Information Network

Trusted

Article rating from 0 people

Default rating: 2.5 of 5

Wikipedia

Tellina tenuis

Tellina tenuis, the thin tellin, is a species of marine bivalve mollusc in the family Tellinidae. It is found off the coasts of north west Europe and in the Mediterranean Sea where it lives buried in sandy sediments.

Bivalves are molluscs with a body compressed between two usually similar shell valves joined by an elastic ligament. There are teeth at the edge of the shell and the animal has a muscular foot, gills, siphons, mouth and gut and is surrounded by a mantle inside the shell.

Contents

Description

The shell of T. tenuis is brittle and flattened and grows to up to nineteen centimetres in length. The outline is oval but the valves are asymmetric with the hinge slightly off centre and the beaks slightly behind the midline. The posterior of the valves is attenuated slightly and the right valve is slightly larger than the left. An olive green ligament joins the two valves. The periostracum is glossy and the colour varies through shades of pink, yellow and brown, often in bands. There is a sculpture of fine concentric lines which is grouped into growth stages and which may be emphasized by bands of colour. The inner sides of the valves are similarly coloured but paler. The mantle is fringed with tentacles and is creamy-white.[2]

Distribution

T. tenuis occurs off the coasts of north west Europe and Morocco and in the Mediterranean Sea and the Baltic Sea. It is found from the middle shore level to a depth of about seven metres.[2] It is widely distributed and common around the coasts of the British Isles.[3]

Biology

T. tenuis burrows in clean sand and has a large foot and two long siphons which it extends to the surface of the sediment. Water and food particles are drawn down to the mollusc through one siphon while water is expelled through the other. It is both a deposit and a filter feeder.[4] The mollusc usually lies on its left side when feeding.[1] When the tide is out it descends to a depth of about ten centimetres but ascends to nearer the sediment surface when feeding. At the low tide level it may be the most abundant macro-organism in the benthos [2] and may reach a density of 3000 individuals per square metre.[4]

Individual molluscs are either male or female and gametes are liberated into the water table during the summer. The larvae are free swimming and form part of the zooplankton for a period. The lifespan is up to 5 years.[1]

Ecology

The closely related species, Tellina fabula is found over the same distribution range but the two are not usually in competition as T fabula occurs from low water level to a depth of about forty metres.[4] Because of its greater exposure at low tides, T tenuis is more susceptible to harm in cold winter weather.[5]

Young flatfish sometimes feed on the tips of the protruding siphons. The damaged siphons are able to regenerate.[5]

References

  1. ^ a b c World Register of Marine Species
  2. ^ a b c Marine Species Identification Portal
  3. ^ Marine Bivalve Shells of the British Isles
  4. ^ a b c Barrett, J. H. and C. M. Yonge, 1958. Collins Pocket Guide to the Sea Shore. P. 161. Collins, London
  5. ^ a b Encyclopedia of Life
Creative Commons Attribution Share Alike 3.0 (CC BY-SA 3.0)

Source: Wikipedia

Unreviewed

Article rating from 0 people

Default rating: 2.5 of 5

Disclaimer

EOL content is automatically assembled from many different content providers. As a result, from time to time you may find pages on EOL that are confusing.

To request an improvement, please leave a comment on the page. Thank you!