Trochus firmus
| Trochus firmus | |
|---|---|
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Vetigastropoda |
| Order: | Trochida |
| Superfamily: | Trochoidea |
| Family: | Trochidae |
| Genus: | Trochus |
| Species: | T. firmus
|
| Binomial name | |
| Trochus firmus | |
| Synonyms[2] | |
| |
Trochus firmus is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.[2]
Description[edit]
The size of the adult shell varies between 20 and 26 mm (0.79 and 1.02 in). 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 seven weak smooth transverse grooves on the upper surface, and about four scarcely elevated concentric girdles on the base. The base of the shell is nearly plane, obsoletely[clarification needed] cingulate and false-umbilicate[clarification needed]. 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]
Distribution[edit]
This marine species occurs in the Persian Gulf.
References[edit]
- ^ Philippi, Conchyl. Cab., p. 317, t. 45, f. 5.
- ^ a b 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
- ^ H. Pilsbry, Manual of Conchology XI, Academy of Natural Sciences, Philadelphia (described as Trochus (Infundibulops) firmus)
- Bosch D.T., Dance S.P., Moolenbeek R.G. & Oliver P.G. (1995) Seashells of eastern Arabia. Dubai: Motivate Publishing. 296 pp.
External links[edit]
- World Register of Marine Species
- "Trochus firmus". Gastropods.com. Retrieved 16 January 2019.