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Neverita duplicata, common name the shark eye, is a species of predatory sea snail, a marine gastropod mollusk in the family Naticidae, the moon snails.[1]
In 2006, a paper was published which made it clear that a second, very similar, species with a smaller range of distribution also lives in part of the range inhabited by Neverita duplicata. The second species had previously been considered to be simply a form of N. duplicata, but it is now recognized as Neverita delessertiana.[2]
This is a common western Atlantic species. It is found from Massachusetts and other parts of New England, south to Florida and other states on the Gulf of Mexico, south to Honduras.
The shell has a flattened globular shape, and reaches about 88 to 90 millimetres (3.5 to 3.5 in) in maximum dimension. The color of the shell is variable, but is often a greyish brown. The central apex of the shell is often a dark blue in fresh shells, which can make the shell somewhat resemble an eye. On the underside, there is a large brown callus which partly blocks the umbilicus of the shell.
The maximum recorded shell length is 82 mm.[3]
A model of a live individual of Neverita duplicata
Apical view of Neverita duplicata
Lateral view of the same shell
Umbilical view of the same shell
Fossil Neverita duplicata from the Pliocene of Florida
This moon snail is found on sandy shores just below the low tide line. In most of its range, the empty shell is very commonly washed up on beaches, as also is the operculum and the sand collar.
The minimum recorded depth for this species is 0 m; the maximum recorded depth is 58 m.[3]
The shark eye (like all moon snails) is predatory, feeding mainly on bivalves buried in the sand. This snail drills a neat "countersunk" circular hole through the shell of its prey species, and then feeds on the soft tissue within.
Neverita duplicata, common name the shark eye, is a species of predatory sea snail, a marine gastropod mollusk in the family Naticidae, the moon snails.
In 2006, a paper was published which made it clear that a second, very similar, species with a smaller range of distribution also lives in part of the range inhabited by Neverita duplicata. The second species had previously been considered to be simply a form of N. duplicata, but it is now recognized as Neverita delessertiana.
Neverita duplicata is een slakkensoort uit de familie van de Naticidae.[1] De wetenschappelijke naam van de soort is voor het eerst geldig gepubliceerd in 1822 door Say.
Bronnen, noten en/of referenties
Neverita duplicata (denominada, em inglês, Atlantic moon snail, double moon snail,[4] shark-eye moon snail[3] ou simplesmente shark eye/shark's eye)[4][5][6][7] é uma espécie predadora de molusco gastrópode marinho do oeste do oceano Atlântico, entre a baía de Fundy, Canadá, e o mar do Caribe, incluindo o golfo do México e toda a costa leste dos Estados Unidos.[8] Pertence à família Naticidae da ordem Littorinimorpha, tendo sido classificada com o nome Natica duplicata, por Thomas Say, em 1822.[1]
Concha de coloração castanho-rosada a cinzenta, em sua superfície polida, brilhante[4] e subglobosa; dotada de espiral baixa e com uma linha negra, girando da protoconcha, acima da sutura (junção entre as voltas), e tornando-se gradualmente diluída, dilatada e obsoleta, em seu curso.[9] Atinge 9.8 centímetros de comprimento, quando desenvolvida. Por baixo, o umbílico está parcialmente coberto por uma ampla calosidade de coloração castanho-escura como um chocolate 100% cacau. Opérculo córneo, castanho e brilhante.[4][9]
A espécie vive em substrato arenosos e de profundidades rasas até 58 metros, na zona nerítica.[7]
Neverita duplicata ocorre no Atlântico Ocidental, da costa do Canadá até o mar do Caribe, em Belize. Isso inclui toda a costa leste dos Estados Unidos, do Maine, na baía de Cobscook, até o Texas.[1][8]
Durante os séculos XIX e XX, esta espécie possuía uma maior variabilidade morfológica de sua concha; porém um estudo científico de 2006, por Hülsken et al. - "Neverita delessertiana (Récluz in Chenu, 1843): a naticid species (Gastropoda: Caenogastropoda) distinct from Neverita duplicata (Say, 1822) based on molecular data, morphological characters, and geographical distribution". Zootaxa 1257; páginas 1–25 -, dividiu a espécie em duas, recuperando o táxon denominado Neverita delessertiana por César Auguste Récluz, em 1843; não sendo mais este um sinônimo de Neverita duplicata.[10][11]
Neverita duplicata (denominada, em inglês, Atlantic moon snail, double moon snail, shark-eye moon snail ou simplesmente shark eye/shark's eye) é uma espécie predadora de molusco gastrópode marinho do oeste do oceano Atlântico, entre a baía de Fundy, Canadá, e o mar do Caribe, incluindo o golfo do México e toda a costa leste dos Estados Unidos. Pertence à família Naticidae da ordem Littorinimorpha, tendo sido classificada com o nome Natica duplicata, por Thomas Say, em 1822.
