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Tegula mariana
''Tegula mariana'' is a species of sea snail, a marine gastropod mollusk in the family Tegulidae.〔WoRMS (2012). ''Tegula mariana'' Dall, 1919. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=575632 on 2012-09-01〕〔Keen M. (1971) Sea shells of tropical West America. Marine mollusks from Baja California to Perú, ed. 2. Stanford University Press. 1064 pp.〕
==Description==
The height of the shell varies between 8.9 mm, its diameter 10.5 mm. The shell has a shiny surface. Its color is dingy white, with broad radiating flames of brown or red above irregularly maculated below, sometimes nearly unicolored, pinkish, with the lirae of the base articulated with red and white dots. The spire is either conic or depressed. The sutures are either simple, linear, or somewhat canaliculate. There is a concavity in the subsutural area. The about 5 whorls are spirally transversed by excessively minute spiral striae. The body whorl has an acute nodulous carina at the periphery, and another angulation or keel at the middle of the upper surface of the whorl and continued upon the spire, and which is usually nodose on the body whorl. There is usually, too, a third ridge or carina, generally coarsely nodose, between the two already described. The base of the shell is more or less convex, generally shows microscopic concentric striae under a lens, and has about 5 low, narrow, separated spiral lirulae. The columella and the inside of the umbilicus are either green or white.〔(Tryon (1889), Manual of Conchology XI, Academy of Natural Sciences, Philadelphia ) (described as ''Chlorostoma coronulatum'')〕
This species is thus characterized by the two angulations on the body whorl and the fine, spiral sculpture between the two keels.〔(Hertlein & Strong, Marine Mollusks collected during the "Askoy" expedition to Panama, Colombia and Ecuador in 1941; Bulletin of the America: 2n museum of Natural History, v. 107 (1955) )〕
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