Steromphala divaricata (Linnaeus 1758)

Steromphala divaricata, common name the divaricate gibbula, is a species of small sea snail, known as top snails or top shells, marine gastropod molluscs in the family Trochidae, the top snails.^[1]

Distribution

It is found in the Mediterranean Sea, the Adriatic Sea and the Black Sea.

Description

The length of the shell is between 12 mm and 24 mm and is 16 mm to 19 mm wide. The conoidal shell is imperforate or narrowly perforate. It is very thick and solid, cinereous. The color of the shell is yellowish or green. It is longitudinally marked with rose-red lines, often oblique or broken into square dots. The spire is more or less elevated. Its outlines are rather convex. The six whorls are encircled by numerous lirulae, the upper ones flattened. The sutures are slightly impressed, but scalariform specimens with deep sutures are frequent. The body whorl is rounded at the periphery and on the base. The aperture is rounded-quadrate. The outer lip is bevelled to an edge, very thick and smooth within. The pearly columella is straightened in the middle. The umbilicus is narrow or concealed.^[2]

References

• Costa O. G., 1829: Catalogo sistematico e ragionato de' testacei delle Due Sicilie; Tipografia della Minerva, Napoli 8 + 132 p., pl. 1-3
• Brusina S., 1866: Contribuzione pella fauna dei molluschi dalmati; Verhandlungen der Kaiserlich-königlichen Zoologisch-botanisch Gesellschaft in Wien 16: 1-134
• Coen G., 1937: Nuovo saggio di una sylloge molluscorum Adriaticorum; Memoria Reale Comitato Talassografico Italiano 240, 1–173, 10 pls
• Gofas, S.; Le Renard, J.; Bouchet, P. (2001). Mollusca, in: Costello, M.J. et al. (Ed.) (2001). European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Collection Patrimoines Naturels, 50: pp. 180–213
• Kantor Yu.I. & Sysoev A.V. (2006) Marine and brackish water Gastropoda of Russia and adjacent countries: an illustrated catalogue. Moscow: KMK Scientific Press. 372 pp. + 140 pls.

Gibbula divaricata es una especie de caracol de mar pequeño, de la familia Trochidae. Se encuentra en el Mar Mediterráneo.^[1]​

El caparazón es de 23 mm de altura y 19 mm de ancho, tiene la forma de un cono y tiene 6 circunvoluciones. El color es verde-amarillo o amarillo-verde.

Referencias

Gibbula divaricata adalah sebuah spesies gastropoda (keong) laut yang kecil, moluska di dalam keluarga Trokidae. Ia dapat ditemukan di Laut Mediterania.

Cangkangnya setinggi 23 mm dan selebar 19 mm, berbentuk kerucut dan punya 6 (enam) konvolusi. Warnanya hijau-kekuningan atau kuning-kehijauan.

Referensi

Gibbula divaricata é uma espécie de molusco pertencente à família Trochidae.

A autoridade científica da espécie é Linnaeus, tendo sido descrita no ano de 1758.

Trata-se de uma espécie presente no território português, incluindo a zona económica exclusiva.

Referências

• Gibbula divaricata - World Register of Marine Species (consultado em 29 de dezembro de 2013).