Overview

Comprehensive Description

Description

 Simnia patula is a small species of up to 2 cm long and 0.8 cm wide. It has a thin glossy shell that is oval in shape. In adults, its shell is convoluted with a spire enclosed by the body whorl. However, in young individuals the spire is exposed, with three swollen whorls. The aperture is elongate and oval, with flared lips that are longer than the other parts of the shell. The lips extend at each end into a canal. The basal inhalant canal is much broader and less distinct from the aperture than the apical exhalent canal. Simnia patula has no operculum and the extremities of the shell may be ornamented with growth rings. The colour of the shell can be white, yellow, pink or dark red with a yellow body having brown streaks and spots primarily on the mantle. In this species the mantle edge actually forms an inhalant siphon. The mantle also has 2 large lateral flaps that cover the shell when the animal is mobile. Simnua patula has a large foot that is ridged longitudinally and pink at the front. The head bears two long tentacles that are white on the upper surface with brown tips. Each tentacle has a basal eye that may be visible with a hand lens.Simnua patula feeds on Alcyonium digitatum, Alcyonium glomeratum, Eunicella verrucosa and the hydroid Tubularia indivisa. It lays its eggs in egg capsules in an irregular roundish mass spread in a layer over an inch thick on Alcyonium digitatum colonies. Each egg capsule is ca 0.35 cm in diameter and round to polygonal in shape and stick together in a tough, slightly yellowish - colourless layer (Lebour, 1932). All of the eggs develop into free-swimming larvae which can be the predominant larval species in the plankton during the summer months, especially August. Lebour (1932) noted that Simnua patula appear to have a long larval stage as the late larvae lived for several weeks without losing the velum.
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Distribution

Not common; occasional records from west Irish and British coasts to Orkney
  • Hayward, P.J.; Ryland, J.S. (Ed.) (1990). The marine fauna of the British Isles and North-West Europe: 1. Introduction and protozoans to arthropods. Clarendon Press: Oxford, UK. ISBN 0-19-857356-1. 627 pp.
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Source: World Register of Marine Species

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Ecology

Habitat

Depth range based on 13 specimens in 1 taxon.
Water temperature and chemistry ranges based on 3 samples.

Environmental ranges
  Depth range (m): 9.2 - 39.05
  Temperature range (°C): 11.353 - 11.845
  Nitrate (umol/L): 4.573 - 6.621
  Salinity (PPS): 35.008 - 35.237
  Oxygen (ml/l): 6.151 - 6.346
  Phosphate (umol/l): 0.333 - 0.482
  Silicate (umol/l): 2.726 - 3.727

Graphical representation

Depth range (m): 9.2 - 39.05

Temperature range (°C): 11.353 - 11.845

Nitrate (umol/L): 4.573 - 6.621

Salinity (PPS): 35.008 - 35.237

Oxygen (ml/l): 6.151 - 6.346

Phosphate (umol/l): 0.333 - 0.482

Silicate (umol/l): 2.726 - 3.727
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

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 Commonly be found on Alcyonium digitatum as well as Eunicella verrucosa and Tubularia indivisa colonies. It is a sublittoral species found at 15-75 meters depth.
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Molecular Biology and Genetics

Molecular Biology

Barcode data: Xandarovula patula

The following is a representative barcode sequence, the centroid of all available sequences for this species.


No available public DNA sequences.

Download FASTA File
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Source: Barcode of Life Data Systems (BOLD)

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Statistics of barcoding coverage: Xandarovula patula

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 1
Specimens with Barcodes: 1
Species With Barcodes: 1
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Wikipedia

Xandarovula patula

Xandarovula patula is a species of sea snail, a marine gastropod mollusk in the family Ovulidae, the ovulids, cowry allies or false cowries.[1]

Description[edit source | edit]

Distribution[edit source | edit]

References[edit source | edit]

  1. ^ a b Xandarovula patula (Pennant, 1777). Gofas, S. (2010). Xandarovula patula (Pennant, 1777). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=224890 on 5 June 2010.
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