Acteon, Montfort, 1810
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publication ID |
978-2-85653-614-8 |
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persistent identifier |
https://treatment.plazi.org/id/03D087B2-FFD5-BE1F-FEE3-7480F296F9C6 |
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treatment provided by |
Felipe |
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scientific name |
Acteon |
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“ Acteon View in CoL ” sp. 6
Figs 22F, 23
MATERIAL EXAMINED. — Norfolk Ridge. SMIB 3 : stn DW 03 , 24°55’S, 168°22’E, 513 m, 1 dd GoogleMaps . — SMIB 8 : stn DW 146-147 , Mont B, Banc Éponge, 24°55’S, 168°22’E, 508-532 m, 8 dd (Fig. 22F) GoogleMaps .
DISTRIBUTION. — Collected only from New Caledonia (Fig. 23), in 513 m.
DESCRIPTION. — Shell morphology. Length 3.5 mm, width 2.5 mm (largest specimen examined). Shell delicate, short, oval, with convex sides (Fig. 22F). Body whorl large, about 4/5 of the shell length. Spire short with 3 whorls. Suture slightly channeled. Umbilicus closed. Aperture wide and short, wider anteriorly, about 2/3 of the body whorl length. Columellar margin slightly thickened, smooth, with no folds. Sculpture of several punctuated spiral grooves. The punctuations are small, oval, and separated from each other within each groove. The grooves are separated by gaps, several times wider than the grooves. Colour uniform dirty white.
Anatomy. Unknown. All shells collected lacked soft parts.
REMARKS. — “ Acteon ” sp. 6 is very similar in shell morphology to “ Acteon ” rhektos n. sp. and it may only represent variation within this latter species. Both species have delicate shells with a short spire and spiral grooves with small punctuations. Specimens of “ Acteon ” sp. 6 are shorter and have a smaller aperture, but so are juvenile specimens of “ A. ” rhektos. The main differences between these two species are the presence of a denticle on the columella of “ A. ” rhektos that is absent in “ Acteon ” sp. 6, and that the sculpture of “ A. ” rhektos has a gap near the posterior end of the spire that is not present in “ Acteon ” sp. 6. Because of these differences “ Acteon ” sp. 6 is provisionally maintained as a different taxon until more material becomes available.
A definitive generic placement for this species is not possible until complete specimens become available for study.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.