Longchaeus acus

Longchaeus acus, common name the needle pyram, is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.[1][2][3]

Needle pyram
A shell of Longchaeus acus from Philippines on display at the Museo Civico di Storia Naturale di Milano
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Gastropoda
(unranked):
clade Heterobranchia
clade Euthyneura
clade Panpulmonata
Superfamily:
Pyramidelloidea
Family:
Pyramidellidae
Genus:
Longchaeus
Species:
L. acus
Binomial name
Longchaeus acus
(Gmelin, 1791)
Synonyms[1]
  • Lonchaeus acus [sic]Gmelin, 1791
  • Longchaeus punctatus (Férussac, 1821)
  • Pyramidella (Longchaeus) acus (Gmelin, J.F., 1791)
  • Pyramidella acus (Gmelin, 1791)
  • Pyramidella maculosa Lamarck, J.B.P.A. de, 1822
  • Pyramidella musculosa Lamarck, J.B.P.A. de, 1816
  • Pyramidella punctata Schubert, H.G. & A.J. Wagner, 1829 (invalid: homonym and synonym of Pyramidella punctata Férussac, 1821)
  • Pyramidella punctata Férussac, 1821
  • Voluta acus Gmelin, 1791 (original combination)
  • Voluta guttata Link, H.F., 1807

Description
Drawing of Pyramidella acus from Manual of conchology, structural and systematic (1881)

The shell is polished. Its color is white, with dark chestnut or chocolate spots, usually arranged in three revolving series on the whorls of the teleoconch and five series on the body whorl. The columella is three-plaited with the upper plait largest. The lip is sometimes lirate within. The peripheral groove becomes in this species either obsolete or indicated by a slight angle.[4] The length of the shell varies between 19 mm and 67 mm.

Distribution

This marine species occurs in the Indo-W Pacific (Red Sea, Tanzania, Madagascar, Mauritius, Mascarene Basin [1] and in South East Asia, in Vietnam and Philippines).

References
  1. Rosenberg, G. (2010). Pyramidella acus (Gmelin, 1791). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=208425 on 2012-01-12
  2. Drivas, J. & M. Jay (1988). Coquillages de La Réunion et de l'île Maurice
  3. Dautzenberg, P. (1923). Liste preliminaire des mollusques marins de Madagascar et description de deux especes nouvelles. Journal de Conchyliologie 68: 21-74.
  4. G.W. Tryon, Manual of Conchology vol. VIII p. 301; 1889
  • Okutani T., ed. (2000) Marine mollusks in Japan. Tokai University Press. 1173 pp. page(s): 703
  • To Biodiversity Heritage Library (12 publications)
  • To Encyclopedia of Life
  • To USNM Invertebrate Zoology Mollusca Collection
  • To World Register of Marine Species
  • "Pyramidella (Longchaeus) acus". Gastropods.com. Retrieved 7 February 2012.
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