Aclis tenuis explained

Aclis tenuis is a species of sea snail, a marine gastropod mollusk in the family Eulimidae.

Distribution

This species occurs in the Northwest Atlantic Ocean off the Gulf of Maine and the Gulf of St. Lawrence.

Description

The maximum recorded shell length is 4.6 mm.^[1]

(Described as Aclis verrilli) The acicular shell is yellowish-white. The four whorls of the protoconch are well-rounded, with strongly impressed sutures, smooth, forming a slender apex to the spire. The post-nuclear whorls are well-rounded and appressed at the summit. They are sculptured by six feeble, poorly defined, somewhat irregular spiral threads and numerous incremental lines, the combination of the two lending the surface of the spire a feebly malleated surface. In addition to the above sculpture the surface is marked with irregularly disposed varical lines. The sutures are strongly impressed. The periphery of the body whorl is well rounded. The base is moderately long, well rounded, narrowly umbilicated and marked by seven feeble and irregularly placed spiral lines. Its surface has the same aspect as that of the spire. The aperture is rather large, somewhat effuse anteriorly, posterior angle somewhat obtuse. The outer lip is patulous. The columella is oblique, slightly curved and strongly revolute. ^[2]

Habitat

Minimum recorded depth is 91 m.^[1] Maximum recorded depth is 3235 m.^[1]

References

• Brunel, P., Bosse, L. & Lamarche, G. (1998). Catalogue of the marine invertebrates of the estuary and Gulf of St. Lawrence. Canadian Special Publication of Fisheries and Aquatic Sciences, 126. 405 p.

External links

• Verrill, A. E. (1882). Catalogue of marine Mollusca added to the fauna of the New England region, during the past ten years. Transactions of the Connecticut Academy of Arts and Sciences. 5(2): 447-587, pls 42-44, 57-58
• Dall W. H. (1927). Small shells from dredgings off the southeast coast of the United states by the United States Fisheries Steamer "Albatross", in 1885 and 1886. Proceedings of the United States National Museum, 70(18): 1-134
• Bartsch, P. (1947). A monograph of the West Atlantic mollusks of the family Aclididae. Smithsonian Miscellaneous Collections. 106 (20): 1-29, 6 pls.

Notes and References

1. Welch J. J. (2010). "The “Island Rule” and Deep-Sea Gastropods: Re-Examining the Evidence". PLoS ONE 5(1): e8776. .
2. https://www.biodiversitylibrary.org/page/15845713 Bartsch, P. (1911). New mollusks of the genus Aclis from the North Atlantic. Proceedings of the United States National Museum. 40 (1829): 435-438, pl. 59