Manaria corindoni n. sp. TYPE MATERIAL - Holotype MNHN IM-2000-27007 (h 37.2), 1 paratype MNHN 1 KF-6950. . TYPE LOCALITY - Indonesia, Makassar Strait, 00°31'N, 117°50'E, 595 m [CORINDON 2: stn CH214] MATERIAL EXAMINED Indonesia. CORINDON 2: stn CH214, Makassar Strait, 00°31'N, 117°50'E, 595 m, 2 dd (holotype MNHN IM-2000-27007 paratype KF-6950) - KARUBAR: stn CP39, Arafura Sea, Tanimbar Island, 07°47'S, 132°26'E, 477-466 m, 1 dd (paratype MNHN IM-2000- 27008;
DISTRIBUTION- Known only from the type material from Indonesia. Syntopic with Manaria clandestina Bouchet & Warén, 1986 in the Tanimbar Islands (KARUBAR stn CP39) and with the holotype of M. makassarensis Bouchet & Warén, 1986 (CORINDON 2 stn CH214). - DESCRIPTION Shell of medium size, up to 41.1 mm, thin, solid, white. Shape slender with high spire, siphonal canal short. Adapical teleoconch whorls subsuturally slightly tabulate, resulting in angulate shape. Abapical portion of whorls becoming convex from sixth whorl. Suture deep. Sculpture adapically dominantly axial, abapically dominantly spiral. Surface of spiral cords rather glossy. Apex eroded, transition from protoconch to teleoconch not visible. Teleoconch with ten whorls. Third whorl with six or seven weak spiral cords, interspaces narrow. Fifth whorl with nine spiral cords, rectangular in profile, interspaces equal in width to one cord. Penultimate whorl with nine spiral cords. Last whorl with 18 spiral cordsand four cords on siphonal canal. Third whorl with 12 axial ribs, interspaces narrow. Penultimate and last whorls with 17 axial ribs, interspaces equal in width to one cord. Aperture ovate. Columella slightly impressed, smooth, abapically slighly callous. Outer lip thin, without internal lirae, edge broken in all studied specimens. Siphonal canal short, narrow, open. Aperture and siphonal canal together slightly more than two-fifths of total shell height. Periostracum thick, adherent, pale brown, forming fine incremental lamellae in axial interspaces and bristles on axial ribs. REMARKS - Manaria corindoni n. sp. is characterized by a high spire with rather angular upper whorls and a slightly tabulated suture, by convex whorls that are slightly tabulated adapically, by wide, flattened spiral cords with sharp edges and narrow interspaces, by narrow, pronounced axial ribs with deep, narrow interspaces, by a rather constricted base and by a gently curved columella with a weak but broad abapical columellar knob. All specimens of Manaria corindoni n. sp. are slightly corroded by the acidic sediment but their sculpture remains distinct.
Manaria thurstoni differs from M. corindoni n. sp. in its wider and flatter spiral cords with slightly narrower interspaces, straighter subsutural (vs. twisted) spiral cords, weaker axial ribs with shallower interspaces, slightly broader shape and more accentuated columeller knob. Manaria clandestina (Figures 4-7) has similar spiral sculpture to that of M. corindoni n. sp. but differs in its more accentuated axial sculpture, sharper and narrower spiral cords with slightly wider interspaces, convex whorls and more slender shape. Manaria venemai, a fossil from the Pliocene or Pleistocene of Timor (Indonesia) is similar in shape and spiral sculpture to M. corindoni n. sp. but differs in its slightly convex shoulder, fewer spiral cords and larger size. ETYMOLOGY-Manaria corindoni n. sp. is named after the expedition's acronym itself a contraction of CORiolis (the research vessel that was used for the cruise) and INDONesia. The CORINDON 2 campaign was the first to collect this species in 1980.