Retusa lenis, Valdés, 2008
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publication ID |
978-2-85653-614-8 |
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DOI |
https://doi.org/10.5281/zenodo.5491869 |
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persistent identifier |
https://treatment.plazi.org/id/03D087B2-FF71-BEB8-FEE3-7249F261FE2C |
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treatment provided by |
Felipe |
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scientific name |
Retusa lenis |
| status |
sp. nov. |
Retusa lenis View in CoL n. sp.
Figs 75A, B, 76
TYPE MATERIAL. — Holotype MNHN 20419 and 4 paratypes MNHN 20420-20422, 3 paratypes LACM 3003 About LACM .
TYPE LOCALITY . — East coast of New Caledonia, Passe de Hienghu , 20°33’S, 165°00’E, 270-282 m [ BATHUS 1 : stn DW 688 ] GoogleMaps .
MATERIAL EXAMINED. — New Caledonia proper. VAUBAN: stn ratype ( MNHN 20420 About MNHN ) . — BATHUS 2 : stn DW 717 , Ile des Pins , 40, 22°30’S, 166°24’E, 250-350 m, 2 dd, paratypes ( MNHN 20421 About MNHN ). 22°44’S, 167°17’E, 350-393 m, 1 dd, paratype ( MNHN 20422 About MNHN ) GoogleMaps .
— BATHUS 1: stn DW 688, Passe de Hienghu, 20°33’S, 165°00’E, Loyalty Ridge. MUSORSTOM 6: stn DW 442, 20°54’S, 167°17’E, 270-282 m, 2 dd, holotype ( MNHN 20419; Figs 75A, B) and pa- 200 m, 2 dd, paratypes ( LACM 3003).
DISTRIBUTION. — Collected only from New Caledonia (Fig. 76), in 200-350 m.
DESCRIPTION. — Shell morphology. Length 2 mm, width 0.8 mm ( holotype). Shell fragile, elongate, wider anteriorly and narrower posteriorly, with nearly parallel sides (Fig. 75A). In some specimens, including the holotype, the left side is slightly concave. Only 1 whorl visible, forming nearly the entire shell, except for a small visible portion of the spire. Apex deeply umbilicate (Fig. 75B), with the aperture lip rising from the right side. The aperture lip forms a rounded wing connected to the columellar margin. Anterior end of the shell rounded. Aperture as long as the shell, wider anteriorly and narrowing abruptly at about 1/4 of its length. Columellar margin slightly thickened. Columella with an inconspicuous fold. Umbilicus closed. Sculpture of a number of faint, simple spiral lines crossed by growth lines. Colour uniformly whitish.
Anatomy. Unknown. All shells collected lacked soft parts.
REMARKS. — The shell morphology of Retusa lenis is similar to that of Retusa succinta A. Adams, 1862 , redescribed by Hori (2000c). Differences between these species include the presence of grey spiral lines and the more quadrangular shape of the shell in the latter. Additionally, R. lenis has a more developed aperture lip.
This species is placed in Retusa , based on the shell morphology, pending availability of complete specimens.
ETYMOLOGY. — From the Latin lenis (soft, smooth), in reference to the smooth, shiny shell of this species.
| LACM |
Natural History Museum of Los Angeles County |
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.
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