Physical Description

Diagnostic Description

Diagnosis

Radula uniserial,Y-shaped and consisting of a single cusp. Shells covered with hard brilliant glaze
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© WoRMS for SMEBD

Source: World Register of Marine Species

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Ecology

Habitat

Depth range based on 91 specimens in 20 taxa.
Water temperature and chemistry ranges based on 51 samples.

Environmental ranges
  Depth range (m): 0 - 220
  Temperature range (°C): -1.657 - 26.891
  Nitrate (umol/L): 0.120 - 6.808
  Salinity (PPS): 25.321 - 35.493
  Oxygen (ml/l): 3.858 - 9.192
  Phosphate (umol/l): 0.119 - 0.640
  Silicate (umol/l): 1.067 - 26.537

Graphical representation

Depth range (m): 0 - 220

Temperature range (°C): -1.657 - 26.891

Nitrate (umol/L): 0.120 - 6.808

Salinity (PPS): 25.321 - 35.493

Oxygen (ml/l): 3.858 - 9.192

Phosphate (umol/l): 0.119 - 0.640

Silicate (umol/l): 1.067 - 26.537
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

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Wikipedia

Amoria (gastropod)

Amoria is a taxonomic genus of medium sized predatory marine gastropod in the family Volutidae. [1]

Contents

Distribution

Amoria are found in onshore and offshore waters around the entire coast of Australia. Several species extend into offshore waters of southern Indonesia. The highest areas of diversity are in the intertidal and shallow subtidal waters of northern Western Australia followed by the subtidal waters around the Great Barrier Reef in Queensland.

Shell description

Amoria have a small, smooth, more or less pointed conical protoconch, a solid very glossy, fusiform shell and an elongate aperture with 4 distinct, more or less developed columellar plicae. The sutures are slightly callous. The colour pattern of the genus Amoria is variable, the base colour is white, yellow or pink with varying degrees or brown axial lines forming a pattern over the base colour. Axial lines may be free or may reticulate to form a tented pattern. [2]

The largest species Amoria hunteri reaches over 200 mm in length. The smallest species is probably Amoria dampieria frequently around 20 mm.

Biology

Amoria are nocturnal and predate on other gastropods and on bivalves. They generally inhabit areas with well sorted coarse sand. Some Amoria species have been noted to bite people when they are handled. The bite is followed by a mild sting but no long term effects have been noted.

Fossil History

The first Amoria appear in the Eocene and Late Miocene from Victoria. Judging from anatomical features, Amoria are close to the genus Cymbiola from which they descended in the Tertiary. Cymbiola are related to Tethyan species of the Late Miocene of Indonesia, Java.

Taxonomy

Amoria includes 20-30 species. The following species have been recognized:

Species brought into synonymy
  • Amoria kawamurai Habe, 1975 - Arafura, Timor Sea: synonym of the subspecies Amoria grayi kawamurai Habe, 19
  • Amoria kingi Cox, 1871: synonym of Amoria undulata (Lamarck, 1804)
  • Amoria newmanae Cotton, 1949: synonym of Amoria turneri (Gray in Griffith & Pidgeon, 1834)

Many subspecific names have been created in the genus Amoria to distinguish colour variations in the shells of the species.

References

  1. ^ a b Bouchet, P.; Bail, P. (2012). Amoria Gray, 1855. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=382343 on 2012-06-11
  2. ^ G.W. Tryon (1886), Manual of Conchology tome IV, Academy of Natural Sciences of Philadelphia
  3. ^ Gastropods.com: Amoria volva
  • N.H. Ludbrook (1953), Systematic Revision of the Volutidid Genus Amoria, J. Mollus. Stud. 30 (4-5): 131-153.
  • Bail, P., Limpus, A. & Poppe, G. T. (2001): The Genus Amoria. In: Poppe, G. T. & Groh, K.: A Conchological Iconography. 50 pp., 93 plts. ConchBooks, Hackenheim, ISBN 3-925919-46-5.
  • Wilson, B. (1994): Australian marine shells 2. Odyssey Publishing, Kallaroo, Western Australia, ISBN 0-646-15227-0.
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