| 词条 | Bullia callosa |
| 释义 |
| image = Bullia callosa 001.jpg | image_caption = Apertural view of a shell of Bullia callosa (museum specimen at Naturalis Biodiversity Center) | regnum = Animalia | phylum = Mollusca | classis = Gastropoda | unranked_superfamilia= clade Caenogastropoda clade Hypsogastropoda clade Neogastropoda | superfamilia = Buccinoidea | familia = Nassariidae | subfamilia = Bullinae | genus = Bullia | species = B. callosa | binomial = Bullia callosa | binomial_authority = (W. Wood, 1828) | synonyms_ref = | synonyms =
}}Bullia callosa, common name the callused bullia, is a species of sea snail, a marine gastropod mollusk in the family Nassariidae, the Nassa mud snails or dog whelks.[1] DescriptionThe length of the shell varies between 18 mm and 50 mm. The shell is elongated and cylindrical. The whole external surface is smooth, shining, of a coffee and milk color. The elongated spire is pointed. It is composed of six not convex whorls. Each whorl is covered between the sutures with a layer of matter, which assumes at the base a chestnut color. This layer is much thicker upon the body whorl, and is continued, enlarging itself, to the left lip, where it forms a large semicircular callosity, of a deep chestnut color, bordered with white. Each of the whorls of the spire is likewise separated from the others by a fawn-colored line, which is delineated a little below each suture. The aperture is ovate, of a pale fawn-color, dilated towards the middle, strongly emarginated at its base. The columella is arcuated, callous, fawn-colored and smooth. The callosity of the columella is oblique, thick, furrowed, much shorter than the outer lip. From its lower part, a stria stretches out, which is directed obliquely upon the back of the shell, to its termination at the anterior angle of the right lip, which is sharp.[2] DistributionThis marine species occurs from Angola to Mozambique. References1. ^{{WRMS species|224363|Bullia callosa Gray||18 April 2010}} 2. ^[https://archive.org/details/generalspeciesic00kien Kiener (1840). General species and iconography of recent shells : comprising the Massena Museum, the collection of Lamarck, the collection of the Museum of Natural History, and the recent discoveries of travellers; Boston :W.D. Ticknor,1837]
External links
2 : Nassariidae|Gastropods described in 1828 |
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