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Annulaturris amicta (E. A. Smith, 1877)

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Vědecká synonyma

Turris amicta E. A. Smith, 1877

Obrázky

Annulaturris amicta

Autor: Kilburn R.N., Fedosov A.E. & Olivera B.M.

Taxon v check-listech zemí*

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EN  

Popis

Turris amicta: Shell fusiform with acuminate, orthoconoid spire but with relatively short base, b/1 0.30-0.36, a/1 0.37-0.42;, siphonal canal short, slightly flexed to right; inner lip sigmoid, thickly calloused, in gerontic individuals developing a wide fasciole with a large false umbilicus; whorls rather flat-sided, suture deep, sometimes channelled. Outer lip convex in side view, anal sinus rather shallow, narrowly V-shaped. Sculpture of rather uniform spiral cords; subsutural cord not projecting, bearing 2-3 spiral threads. Sulcus very narrow and moderately deep, often slightly recessed under sinus cord. Sinus cord bearing 1-2 ridges (flattening out towards lip). Basal part of spire whorls with 3-4 main cords, slightly angular with widely sloping sides, to rounded, the upper one forming the barely projecting periphery; often a weaker ridge in intervals. Base of last whorl with about 10-14 main cords, intervals between cords with 1-3 intermediary threads, rostrum with an additional 10-12 fine, close threads. Collabral threads relatively strong in interstices, periostracum sometimes giving them a lamellar appearance. Uniform white, with a persistent yellowish-olive periostracum. Protoconch unknown. Maximum length 65 mm.
Kilburn R.N., Fedosov A.E. & Olivera B.M. (2012) Revision of the genus Turris Batsch, 1789 (Gastropoda: Conoidea: Turridae) with the description of six new species.

Možné záměny

Turris amicta: An uncommon species in modern collections, but is probably overlooked in the field, perhaps on account of its drab appearance. It is most similar to Turris kathiewayae n. sp. in shell characters; that species, however, lacks the persistent periostracum, and has a longer, straighter siphonal canal and steep-sided spiral cords. Bombay specimens appear to be much smaller (e.g. 38.5 mm) than those from the east coast of India.
Kilburn R.N., Fedosov A.E. & Olivera B.M. (2012) Revision of the genus Turris Batsch, 1789 (Gastropoda: Conoidea: Turridae) with the description of six new species.

Rozšíření

Turris amicta: Gulf of Aden and Pakistan, south to India and Sri Lanka (Powell, 1964), north to Chennai, shallowly subtidal in marine grassflats.
Kilburn R.N., Fedosov A.E. & Olivera B.M. (2012) Revision of the genus Turris Batsch, 1789 (Gastropoda: Conoidea: Turridae) with the description of six new species.

Možné záměny

Annulaturris kathiewayae (Kilburn, Fedosov & B. M. Olivera, 2012)
Makiyamaia orthopleura (R.N. Kilburn, 1983)

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