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Ameranna willemsae (De Jong & Coomans, 1988)

říše Animalia - živočichové »  kmen Mollusca - měkkýši »  třída Gastropoda - plži »  řád Neogastropoda »  čeleď Pisaniidae »  rod Ameranna

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Ameranna willemsae

Autor: Watters, G.T.

Taxon v check-listech zemí*

* Výčet zemí nemusí být kompletní

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Popis

Average size 10.2 mm in length (min, 9.3; max, 10.9). Fusiform; spire ca. 50-60 % total length Protoconch small, of 1.5 smooth, uncolored whorls. Teleoconch of 5 whorls, weakly demarcated from protoconch. Teleoconch sculpture of ca. 13-15 rounded prominent, widely separated spiral threads, including siphonal canal, with intercalated 2 threads. Spiral cords on siphonal canal slightly stronger. Axial sculpture of widely spaced, high ribs; ca. 7-10 ribs on penultimate whorl. 6-8 ribs on last whorl, not including varix. Intersections of axial and spiral sculptured with strong, elongated nodules, Terminal varix well developed somewhat constricted, wide. Aperture oval, outer lip with 6-7 lirate teeth. Columella angled at siphonal canal and hearing 5-6 minute but distinct denticles along its length: parietal lip erect for most of its length. Siphonal canal short, open. Color tan orangish, or brown with wide subperipheral pale band. Primary spiral cords brown between axial ribs white as they pass over the axial ribs. Aperture white. Operculum leaf-shaped, tan, with anterior terminal nucleus. Radula and anatomy unknown.
Watters, G. T., 2009. A revision of the western Atlantic Ocean genera Anna, Antillophos, Bailya, Caducifer, Monostiolum, and Parviphos, with description of a new genus, Dianthiphos, and notes on Engina and Hesperisternia Gastropoda: Buccinidae: Pisaniinae) and Cumia (Colubrariidae).

Rozšíření

Type Locality: Aruba, harbour. Distribution: This is a rare species in the southern Caribbean Sea. It has been found off Panama, Cayos de San Andres. Tobago, and Aruba. Most specimens seen are from Cavos de San Andres. Possibly the Bahamas and off Venezuela as well.
Habitat: Most specimens examined were worn. Freshly dead shells were recorded from 40-60 m. Nothing is known of the substrate.
Watters, G. T., 2009. A revision of the western Atlantic Ocean genera Anna, Antillophos, Bailya, Caducifer, Monostiolum, and Parviphos, with description of a new genus, Dianthiphos, and notes on Engina and Hesperisternia Gastropoda: Buccinidae: Pisaniinae) and Cumia (Colubrariidae).

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