| 词条 | Trochus firmus |
| 释义 |
| taxon = Trochus firmus | image = | image_caption = | authority = Philippi, 1849 [1] | synonyms_ref = [2] | synonyms =
| display_parents = 3 }}Trochus firmus is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.[2] DescriptionThe size of the adult shell varies between 20 mm and 26 mm. The notably thick, solid shell has a rather conical shape. It is, transversely sulcate. It has a pale green ground, painted with close purple-red streaks above. The base has red-spotted girdles.The whorls are a little subangular above the suture and a little plicate below the sutures, appearing somewhat terraced. The body whorl is rounded-angulate and passes into the base with a blunt angle. The sculpture consists of about 7 weak smooth transverse grooves on the upper surface, and about 4 scarcely elevated concentric girdles on the base. The base of the shell is nearly plane, obsoletely cingulate and false-umbilicate. The funnel-shaped pit occupying the place of the umbilicus has a slightly elevated liration.The aperture is rhomboidal. The entirely simple columella is very oblique.[3] DistributionThis marine species occurs in the Persian Gulf. References1. ^Philippi, Conchyl. Cab., p. 317, t. 45, f. 5. 2. ^1 Bouchet, P. (2014). Trochus firmus Philippi, 1849. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=723681 on 2014-06-15 3. ^[https://archive.org/details/manualofconcholo111tryo H. Pilsbry, Manual of Conchology XI, Academy of Natural Sciences, Philadelphia] (described as Trochus (Infundibulops) firmus)
External links
2 : Trochus|Gastropods described in 1849 |
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