| 词条 | Atlanta brunnea |
| 释义 |
| name = Atlanta brunnea | fossil_range = Pliocene-Recent[1] | image = Atlanta brunnea.png | image_caption = apical view of the shell of Atlanta brunnea from the Pliocene of Philippines | image2 = Atlanta brunnea 2.png | image2_caption = apertural view of the shell of Atlanta brunnea from the Pliocene of Philippines | regnum = Animalia | phylum = Mollusca | classis = Gastropoda | unranked_superfamilia= clade Caenogastropoda clade Hypsogastropoda clade Littorinimorpha | superfamilia = Pterotracheoidea | familia = Atlantidae | subfamilia = | genus = Atlanta | subgenus = | species = A. brunnea | binomial = Atlanta brunnea | binomial_authority = J. E. Gray, 1850[1] | synonyms_ref = [3] | synonyms = Atlanta fusca Souleyet, 1852[2] }}Atlanta brunnea is a species of sea snail, a holoplanktonic marine gastropod mollusk in the family Atlantidae.[3] DescriptionAtlanta brunnea is a small species (shell diameter to 2.0 mm) that is darkly pigmented (brown to reddish-and golden-brown).[6] The keel is tall and colorless, and inserts between the last and penultimate shell whorls in animals larger than 1.5 mm.[6] The spire is tall and conical, consisting of 4 whorls and possessing a complex pattern of spiral sculpture that ends on the protoconch and is replaced by spiral rows of small punctae on the teleoconch.[6] Coloration ranges from brown to amber and reddish brown.[6]Juveniles of this species are easily recognised by their shape and ornament.[1] The protoconch is rather high conical and has 3½ - 3¾ whorls, slowly increasing in diameter.[1] On the first whorl, in front of the nucleus, an ornament is seen of some nine or ten irregular spirals.[1] Two stronger spirals from the second whorl on delimit a subsutural zone and the base of the shell.[1] On these spirals the whorl profile is slightly angular.[1] The whole surface of the protoconch is furthermore covered with numerous finer spirals in an irregular zigzag shape, also on the base and within the umbilicus.[1] The boundary with the teleoconch is made distinct by the sudden disappearance of these spirals.[1] From that point on the whorl diameter increases rapidly, by which the shape of the shell becomes lenticular.[1] Somewhat more than one teleoconch whorl is present in the largest specimens.[1] The periphery of the body whorl is angular and bears a distinct flange-like keel.[1] The protoconch is visible in an apertural view.[1] Eyes aretype a, operculum is type a, and radula type I.[6] Description overview:
DistributionAtlanta brunnea has an almost worldwide tropical and subtropical distribution pattern.[1]Fossil distributionAtlanta brunnea is known from the Pliocene of Anda, Pangasinan, Luzon, Philippines.[1]EcologyIt is limited to the upper 100 m of the water column in Hawaiian waters.[6] Comparison of day and night vertical distribution of abundances suggested that a portion of the population from 50–100 m migrated into the upper 50 m at night.[6] ReferencesThis article incorporates CC-BY-3.0 text from references.[5][6] 1. ^Gray J. E. (1850). Catalogue of the Mollusca in the collection of the British Museum, 2. Pteropoda. British Museum and E. Newman, London: iv + 45 pp. 2. ^{{fr icon}} Souleyet F. L. A. (1852). In: Eydoux, [F.] & Souleyet, [F.L.A.] Voyage autour du monde exécuté pendant les années 1836 et 1837 sur la corvette ‘La Bonite’, commandée par M. Vaillant, capitaine de vaisseau, publié par ordre du Gouvernement sous les auspices du département de la marine. Zoologie, 2. Mollusques; Ptéropodes: 37-392, atlas (undated): pls 4-15, 15bis, 16-23, 23bis, 24, 24bis. A. Bertrand, Paris. 3. ^1 {{WRMS species|238118|Atlanta brunnea J. E. Gray, 1850|||WoRMS (2010). Atlanta brunnea J. E. Gray, 1850. In: Bouchet, P.; Gofas, S.; Rosenberg, G. (2010) World Marine Mollusca database. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=238118 on 14 August 2010}} 4. ^1 2 Welch J. J. (2010). "The "Island Rule" and Deep-Sea Gastropods: Re-Examining the Evidence". PLoS ONE 5(1): e8776. {{doi|10.1371/journal.pone.0008776}}. 5. ^1 2 3 4 5 6 7 8 9 10 11 12 13 14 {{cite journal | author=Janssen A. W.| title=Holoplanktonic Mollusca (Gastropoda: Pterotracheoidea, Janthinoidea, Thecosomata and Gymnosomata) from the Pliocene of Pangasinan (Luzon, Philippines)| journal=Scripta Geologica| year=2007| volume=135| url=http://www.scriptageologica.nl/07/nr135/a02}} 6. ^1 2 3 4 5 6 7 8 9 10 11 12 Seapy R. R. (2009). Atlanta brunnea Gray 1850. Atlanta fusca Souleyet 1852. Version 03 September 2009. http://tolweb.org/Atlanta_brunnea/28759/2009.09.03 in The Tree of Life Web Project. External links{{taxonbar|from=Q3176642}} 2 : Atlantidae|Gastropods described in 1850 |
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