Taxonomic review of tropical western Atlantic shallow water Drilliidae (Mollusca: Gastropoda: Conoidea) including descriptions of 100 new species Fallon, Phillip J. Zootaxa 2016 4090 1 1 363 3DYCZ [151,450,151,177] Gastropoda Drilliidae Fenimorea Animalia Neogastropoda 176 177 Mollusca species jongreenlawi sp. nov.    Typelocality.Petit NevisI., SVG, in  8 m.  Other material examined.1 spec., 9.3 x 4.0 mm, 0.8 kmW of Pigeon Pt., TobagoI., Trinidad & Tobago, R. Masino! (author’s coll.).  Range and habitat.SVG (Canouan I.; Petit NevisI.); Trinidad & Tobago( TobagoI.). Reported from 6– 9 m.   Description. Shellsmall (to 12.3 mmin total length), stoutly fusiform, bullet-shaped, with a short, acuminate spire and truncated last whorl; to about 8¼ whorls, slightly convex on spire, last whorl approximately 64% of shell length. Axial sculpture dominates. Protoconchpaucispiral, of 2 smooth round whorls, the second bulging, edge slightly beyond suture with first teleoconch whorl. Axial sculptureof low, round ribs that extend from suture-tosuture, slightly reduced and curved in the sulcus, evanescing on shell base. Ribs number 11–15 on penultimate and 6–9 on last whorl to the varix. Ribs about as wide as their interspaces. Growth striae cover shell surface; striae on trailing sides run parallel with ribs; striae on leading side cross over ribs obliquely at rib shoulders, thence to suture, slightly arcuate in sulcus. Spiral sculptureof very fine threads, more closely spaced in sulcus, becoming slightly ridge-like on shell base and anterior fasciole. These are made jagged by intersecting, more closely spaced growth striae creating spirally aligned rectangular pits between the threads, the characteristic microsculpture of  Fenimorea. Larger, more widely spaced spiral grooves are lacking. Sulcusdemarcated with a crease anteriorly, with low, slightly convex, arcuate ribs, spiral lines and growth striae. Vari xbroad, hump-like, ⅓-turn back from the edge of the outer lip. Outer lipprojecting, somewhat flattened from the varix to its edge; smooth, without teeth, with a weak indentation anteriorly for a stromboid notch. Anal sinusdeep, close to suture, round at its apex, partially constricted at its opening by a parietal callus and projection of outer lip. Inner lipmargined, thickest anteriorly, thin on the parietal wall, formed into a parietal lobe posteriorly. Anterior canalshort, open, slightly notched, anterior fasciole not swollen. Colorwhite with light brown band below periphery; darker brown in intercostal spaces, patches on sulcus, and varix.   Remarks. Taxonomy. Fenimorea jongreenlawihas all the traits of the genus: shell surface microsculpture typical for the genus, ribs suture-to-suture that are modified in the sulcus, a broad, hump-like varix, and a deep Ushaped anal sinus. It is unique for its small size and coloration. Variability.The 34 examined specimens have an average total length of 10.87 mm( 9.3–12.3 mm) and an average W/ L ratioof 0.405. While the specimens from SVG are very similar in color, a single specimen from TobagoI. is more orange in color. It is not known if this single representative is typical of the Tobagoan population.  Identification. Fenimorea jongreenlawiis similar to  F. caysalensis, new species,  F. biminensis, new species,  F. glennduffyi, new species,  F. culexensis, Usticke, 1969, and  F. fabae, new species. From  F. caysalensisit differs in being less stout (W/L = 0.405 versus 0.449), in possessing slightly fewer axials (11–15 versus 12–18 on the penultimate whorl), and in having a smooth, not scalloped outer lip. Also,  F. caysalensisis more darkly colored. From  F. bimensisand  F. glennduffyiit differs in lacking minute “teeth” on the edge of the outer lip, is a paler brown color, and has a slightly acuminate spire tip, which is not so in  F. biminensisand  F. glennduffyi. From  F. culexensisit differs in being smaller ( 10.87 mmversus 11.97 mmaverage total length), in lacking spiral grooves on the last whorl, in possessing a round not squarish base, and in coloration. From  F. fabaeit differs in being larger (10.87 versus 8.99 mmaverage total length), in possessing ribs and a more streamlined profile. It also has a different color pattern.   Etymology.Named in honor of Dr. Jon Greenlaw, ornithologist and conchologist, who was hugely influential in stimulating my interest in molluscan taxonomy.