44,275 research outputs found
Measurement of the ratio of prompt χ c to J / ψ production in pp collisions at √s = 7 TeV
No full textThe prompt production of charmonium χ c and J / ψ states is studied in proton-proton collisions at a centre-of-mass energy of √s = 7 TeV at the Large Hadron Collider. The χ c and J / ψ mesons are identified through their decays χ c → J / ψ γ and J / ψ → μ + μ - using 36 pb - 1 of data collected by the LHCb detector in 2010. The ratio of the prompt production cross-sections for χ c and J / ψ, σ (χ c → J / ψ γ) / σ (J / ψ), is determined as a function of the J / ψ transverse momentum in the range 2 < p T J / ψ < 15 GeV / c. The results are in excellent agreement with next-to-leading order non-relativistic expectations and show a significant discrepancy compared with the colour singlet model prediction at leading order, especially in the low p T J / ψ region
Fenimorea contracta Fallon, 2016, new species
No full textFenimorea contracta, new species (Plate 72) Type material. Holotype 15.3 x 5.4 mm, R. Black! aboard R/V Ike, 20 Apr 1967 (UF 170316). Type locality. NE of Contoy Light, Quintana Roo, Mexico, in 100 fms [183 m]. Range and habitat. Known only from the holotype. Description. Shell small (to 15.3 mm total length), narrowly fusiform, surface glossy smooth; whorls convex, number 8 ½, last whorl 57 % of total shell length; ribs the predominant sculpture; aperture narrow. Protoconch of 2 smooth round whorls. Axial sculpture of bold straight ribs that run from suture-to-suture on spire, evanesce on base, aligned on all but last 2 whorls; ribs number 5 on penultimate, 4 on last whorl to varix, intercostal space wider than ribs. Varix narrow, approximately ⅓-turn from edge of outer lip. Spiral sculpture of very fine threads or grooves, intersected and made jagged by microscopic growth striae; threads spaced more closely in sulcus. Sulcus not distinct, demarcated where ribs are slightly narrowed, recurved, and slightly reduced in height. Outer lip thin, somewhat flattened from varix to lip’s edge; with 5 irregular post-varical folds; edge of lip from anal sinus to anterior canal relatively straight, not curved, smooth not toothed; stromboid notch absent. Anal sinus a deep Ushaped notch next to the suture; with a lobe on the parietal side, and a callus thickening around the apex of the sinus. Inner lip anteriorly pinched up along canal, widest on columella, narrow on parietal wall, and thickened into a lobe near the suture posteriorly. Anterior canal of moderate length for the genus, open, notched at its end; fasciole not swollen. Color light saffron overall with golden brown patches confined to intercostal spaces. Remarks. Taxonomy. Fenimorea contracta has the characteristic shell surface microsculpture of Fenimorea, ribs suture-to-suture, and a deep U-shaped anal sinus. Its narrow varix, narrow sulcus, and anterior canal, which is of moderate length are typical of offshore species (as exemplified by F. j a ne t a e Bartsch, 1934). Near shore species, such as F. fucata (Reeve, 1845), generally have broad varices, wide sulci, and short anterior canals. Identification. Fenimorea contracta is most similar to F. crocea, new species in color, size, but differs in having fewer ribs and narrower profile (W/L of holotypes = 0.353 versus 0.386). The narrow profile and presence of only five ribs on the single specimen is unique enough to distinguish this taxon from its congeners and merit its description as a new species. Etymology. The Narrow Fenimorea. Named for its narrow form. From the Latin adjective contractus, feminine contracta, meaning narrow/restricted/pinched.Published as part of Fallon, Phillip J., 2016, Taxonomic review of tropical western Atlantic shallow water Drilliidae (Mollusca: Gastropoda: Conoidea) including descriptions of 100 new species, pp. 1-363 in Zootaxa 4090 (1) on pages 156-157, DOI: 10.11646/zootaxa.4090.1.1, http://zenodo.org/record/26329
Evidence for the decay B0→J/ψω and measurement of the relative branching fractions of meson decays to J/ψη and J/ψη′
No full textFirst evidence of the B 0 → J / ψ ω decay is found and the B s 0 → J / ψ η and B s 0 → J / ψ η ′ decays are studied using a dataset corresponding to an integrated luminosity of 1.0 fb -1 collected by the LHCb experiment in proton-proton collisions at a centre-of-mass energy of sqrt(s) = 7 TeV. The branching fractions of these decays are measured relative to that of the B 0 → J / ψ ρ 0 decay:frac(B (B 0 → J / ψ ω), B (B 0 → J / ψ ρ 0)) = 0.89 ± 0.19 (stat) - 0.13 + 0.07 (syst),frac(B (B s 0 → J / ψ η), B (B 0 → J / ψ ρ 0)) = 14.0 ± 1.2 (stat) - 1.5 + 1.1 (syst) - 1.0 + 1.1 (frac(f d, f s)),frac(B (B s 0 → J / ψ η ′), B (B 0 → J / ψ ρ 0)) = 12.7 ± 1.1 (stat) - 1.3 + 0.5 (syst) - 0.9 + 1.0 (frac(f d, f s)), where the last uncertainty is due to the knowledge of f d / f s, the ratio of b-quark hadronization factors that accounts for the different production rate of B 0 and B s 0 mesons. The ratio of the branching fractions of B s 0 → J / ψ η ′ and B s 0 → J / ψ η decays is measured to befrac(B (B s 0 → J / ψ η ′), B (B s 0 → J / ψ η)) = 0.90 ± 0.09 (stat) - 0.02 + 0.06 (syst)
F. T. Fallon, The enthronement of Sabaoth, Jewish elements in Gnostic Creation myths, Leiden, E. J. Brill, 1978. (= Nag Hammadi Studies 10)
No full textBertrand Daniel Alain. F. T. Fallon, The enthronement of Sabaoth, Jewish elements in Gnostic Creation myths, Leiden, E. J. Brill, 1978. (= Nag Hammadi Studies 10). In: Revue d'histoire et de philosophie religieuses, 60e année n°2, Avril-juin 1980. p. 259
F. T. Fallon, The enthronement of Sabaoth, Jewish elements in Gnostic Creation myths, Leiden, E. J. Brill, 1978. (= Nag Hammadi Studies 10)
No full textBertrand Daniel Alain. F. T. Fallon, The enthronement of Sabaoth, Jewish elements in Gnostic Creation myths, Leiden, E. J. Brill, 1978. (= Nag Hammadi Studies 10). In: Revue d'histoire et de philosophie religieuses, 60e année n°2, Avril-juin 1980. p. 259
Fenimorea fabae Fallon, 2016, new species
No full textFenimorea fabae, new species (Plates 65, Figs. 5, 6 & Plate 76) Type. Holotype 10.1 x 4.4 mm (ANSP 370199); 15 paratypes originally from the same lot as the holotype, 9 measured: 10.4 x 4.5, 9.6 x 4.1, 10.4 x 4.7, 9.6 x 4.3, 10.3 x 4.4, 9.6 x 4.3, 10.0 x 4.6, 10.0 x 4.5 & 8.7 x 4.0 mm (ANSP 464999). All types, J. Worsfold! Type locality. Caravel Beach (John Jack Point), Freeport, Grand Bahama I., Bahama Is., 26 ° 29 ' 30 ''N, 078° 41 ' 45 ''W, in shallow water. Other material examined. An additional 18 specimens were examined: 1 spec., 8.3 x 3.6 mm, in 12 m, Kings Bay (Dundee Bay), Grand Bahama I., Bahama Is., 26 ° 29 ' 15 "N, 078° 43 ' 30 "W, J. Worsfold! (ANSP 373187); 14 spec., 8.2 x 3.8, 9.4 x 4.0, 9.0 x 4.0, 8.6 x 3.9, 9.1 x 3.9, 8.1 x 3.6, 8.4 x 3.7, 7.8 x 3.5, 8.5 x 3.7, 7.7 x 3.8, 8.3 x 3.6, 8.7 x 3.6, 7.5 x 3.6, 7.3 x 3.3 mm, in 9 m, Bahama Club slipway, Kings Bay Jetty, Kings Bay, Dundee Bay, Grand Bahama I., 26 ° 29 ' 15 ''N, 078° 43 ' 30 ''W, J. Worsfold! (ANSP 369088); 1 spec., 10.2 x 4.5 mm, in 11 m, Borco pipeline, 5 mi [8 km] W of Freeport, Grand Bahama I., 26 ° 30 ' 30 ''N, 078° 46 ' 30 ''W, J. Worsfold! Jun 1982 (ANSP 370942); 2 spec., 8.8 x 4.4 & 9.2 x 4.7 mm, in beach wash, Millar’s Beach, Eleuthera I., Bahama Is., M. Williams! 6 May 1998 (author’s coll.). Range and habitat. Bahama Is. (Grand Bahama I.; Eleuthera I.), in shallow water to 12 m. Description. Shell small (to 10.4 mm), bullet-shaped, of up to 7 ¾ impressed whorls, last whorl large, approximately 66 % of total length. Spire short, slightly acuminate at its tip; whorls straight-sided except for sutural impressions, and slight creases marking the anterior boundary of the sulcus. Protoconch of 2 smooth glossy-white whorls. Axial sculpture of crowded minute ribs on the first 1 ½ whorls of the teleoconch, obsolete on the remaining whorls. Varix hump-like, approximately ¼- to ⅓-turn from the edge of the outer lip. Spiral sculpture absent; shell surface packed with microscopic growth striae and spiral incised lines, so close that under a dissecting microscope the shell’s surface appears velvety. Sulcus slightly convex, not excavated, but is marked by a slight spiral crease at its anterior margin. Outer lip thin, edge smooth, without scalloping, and without a stromboid notch. Lip edge, from the anal sinus to midway point flexed slightly into the aperture. Anal sinus is deep, round at its apex, lies next to the suture, except for the opening, which is skewed anteriorly by the parietal callus. Inner lip margined, and mostly a faint with a narrow wash of enamel; callus is present posteriorly on the parietal wall; columella is straight. Anterior canal is short, open, and slightly notched at its tip. Anterior fasciole not swollen; without spiral threads or ridges. Color white, with narrow orange-brown band below whorl periphery; patches on varical hump, and sporadically on whorls’ shoulder. Remarks. Taxonomy. Fenimorea fabae is the most aberrant of the fucata -like species [Fenimorea fucata (Reeve, 1845)]. The characteristic shell microsculpture of Fenimorea is present but is compressed—spiral threads and growth striae are closer together producing a felt-like surface when viewed under a dissecting microscope. High magnification SEM photographs of the microsculpture of F. f a ba e are compared with similar photographs of F. janetae Bartsch, 1934, and F. fucata (Reeve, 1845) in Plate 65, two species that exhibit the typical pattern of the genus. The presence of axials from suture-to-suture, although only present on early teleoconch whorls, a varical hump, in addition to the typical shell microsculpture allies this species with Fenimorea. The near absence of axial ribs is probably a secondary loss, perhaps an environmental adaptation. Variability. The 26 measured specimens have an average total length of 8.99 mm (7.3–10.4 mm), and average W/ L ratio of 0.445. Identification. Fenimorea fabae resembles the dwarf ecotypes of F. f u c at a (Reeve, 1845) that have the same color pattern, which are also found on Grand Bahama I., but possesses axial ribs, a more distinct sulcus, a straight, not acuminate spire tip, and a less dense “ Fenimorea -like” microsculptural pattern. Dwarf specimens of F. f uc a t a are depicted in the plates included in that section. Fenimorea fabae is also similar to F. culexensis Usticke, 1969, F. jongreenlawi, new species, F. caysalensis, new species, F. glennduffyi, new species, and F. biminensis, new species. It differs from F. culexensis in possessing a round last whorl, not square, in lacking fimbriations at the suture, and in having a different coloration. From F. jongreenlawi it differs in lacking ribs, a distinct sulcus, in being stockier, and in its color pattern. From F. caysalensis, F. glennduffyi, and F. biminensis it differs in lacking ribs, a distinct sulcus, and spiral grooves that end in “teeth” at the edge of the outer lip. Etymology. The Bean Fenimorea, from the Latin noun fabae (feminine form) meaning resembling a bean. The small, squat smooth almost oval shell has inspired the name.Published as part of Fallon, Phillip J., 2016, Taxonomic review of tropical western Atlantic shallow water Drilliidae (Mollusca: Gastropoda: Conoidea) including descriptions of 100 new species, pp. 1-363 in Zootaxa 4090 (1) on pages 162-164, DOI: 10.11646/zootaxa.4090.1.1, http://zenodo.org/record/26329
Erratum to: TDP-43 gains function due to perturbed autoregulation in a Tardbp knock-in mouse model of ALS-FTD (Nature Neuroscience, (2018), 21, 4, (552-563), 10.1038/s41593-018-0113-5)
No full textIn the version of this article initially published, the footnote number 17 was missing from the author list for the two authors who contributed equally. Also, the authors have added a middle initial for author Justin R. Fallon and an acknowledgement to the Babraham Institute Imaging Facility and Sequencing Core Facility. The errors have been corrected in the HTML and PDF versions of the article
Fenimorea tessellata Fallon, 2016, new species
No full textFenimorea tessellata, new species (Plate 99) Types. Holotype 35.2 x 14.2 mm (UF 156611); 8 paratypes: 1 spec., 26.9 x 11.0 mm, Gulf of Mexico, J. Moore! (USNM 900217); 1 spec., 39.4 x 14.5 mm, in 126 m, W Gulf of Mexico, D. Steger! (DMNH 175343); 1 spec. 32.2 x 12.0 mm, in 60 m, E of Palmas Point, Yucatan, Mexico, D. Steger! Oct 1953 (UF 156610); 1 spec., 19.8 x 6.8 mm, in 49–54 m, Campeche Bank off Yucatan, 22 ° 19.42 'N, 90 ° 21.84 'W, E. García! aboard R/V Pelican, 21 Jun 2005 (EFG 26028); 1 spec., 29.9 x 12.3 mm, in 52 m, off Tarpon Springs, Pinellas Co., W Florida, J. Moore! Oct 1965 (USNM 900218); 1 spec., 38.1 x 13.5 mm, in 183 m, off Egmont Key, Hillsborough Co., W Florida, J. Moore! 1961 (UF 156612); 2 spec., 38.5 x 14.5 & 16.2 x 6.4 mm, in 49 m, SW of Naples, Collier Co., M.E. Powlus! 18 Jul 1960 (UF 170843). Type locality. Off Anna Maria Key, Manatee Co., W Florida in 55 m. Other material examined. An additional 6 specimens were examined: Mexico: 1 spec., 29.7 x 10.8 mm, in 126 m, ENE of Alacran Reef, Campeche Bank, off Yucatan (DMNH 107814); 1 spec., 28.7 x 11.2 mm, in 49–52 m, 65 km WSW of Alacran Reef, off Yucatan, 22 ° 18.39 'N, 090° 21.84 'W, E. García! aboard R/V Pelican, 21 Jun 2005 (EFG 26240); 1 spec., 26.6 x 10.2 mm, Campeche Bank, off Campeche, W.M. Bass! Aug 1952 (UF 196252); 1 spec., 32.6 x 12.0 mm, in 93–94 m, ca. 20 km WSW of Triángulos Reef, Campeche Bank, off Campeche, 20 ° 51.16 'N, 92 ° 26.28 'W, E. García! aboard R/V Pelican, 10 Jun 2005 (EFG 26112). W Florida: 1 spec. 27.5 x 10.5 mm, in 46 m, WSW of Johns Pass, Pinellas Co., Steger! 1965 (ANSP 306249). E Florida: 1 spec., 24.8 x 9.8 mm, in 73 m, off Palm Beach, Palm Beach Co., McGinty! 8 Jun 1940 (UF 155666). Range and habitat. Mexico (Campeche Bank: off Yucatan; off Campeche); W Florida (off Pinellas Co.; off Hillsborough Co.; off Manatee Co.; off Collier Co.). Reported from 4–210 m depths, most in the narrower range of 46– 126 m. A single specimen from off Palm Beach Co., E Florida may be this species (Pl. 99, Fig. 5). Description. Shell medium (to 39.4 mm), fusiform, truncated anteriorly, up to 11 ¾ whorls, with a large body whorl approximately 56 % of the shell’s length. Whorls turreted, nearly flat-sided, with a concave sulcus below the appressed suture. Protoconch of 2 smooth round whorls. Axial sculpture of numerous narrow ribs that appear to terminate at, but are greatly reduced and recurved in sulcus, and curved in toward anterior fasciole on shell base; 13–15 ribs on penultimate, 9–11 on body whorl to varix, crests narrow, not round; spaces between axials about same as width of axials. Varix narrow, not much wider than preceding rib, which sometimes runs into the varix; about ⅓-turn from outer lip edge. Spiral sculpture of microscopic fine jagged threads, with sub-equal intersecting growth striae, appearing very similar to that of F. f uc a t a —with “pits” appearing between the growth striae. In addition, overriding the microsculpture are widely spaced spiral grooves, about 11 on the body whorl. Sulcus concave, well demarcated by the abrupt change in the ribs, which become thinner and recurved. The microsculpture seen elsewhere on the shell is also present in the sulcus. Outer lip thin, thickened in older specimens, flattened from the varix to lip edge, with fine strengthening axial folds. Edge of lip, beginning just behind the anal sinus, forms a low arc from anal sinus to stromboid notch, is scalloped by projecting ends of spiral grooves and bent slightly inward near anal sinus. Stromboid notch shallow. Anal sinus a deep notch adjacent to suture posteriorly, set off at an angle from axis of shell by parietal callus anteriorly; flared inner rim of sinus and upward bend of outer lip causes sinus to appear spout-like. Inner lip detached anteriorly along canal, but reduced to a glaze in the parietal area. A large callus present posteriorly forming parietal side of the anal sinus. Anterior canal short, curved to the right viewed ventrally, notched at its tip. Anterior fasciole slightly swollen; without spiral grooves or cords, but with microsculpture like shell base. Color white with 4 reddish-brown spiral bands visible on the last whorl, posterior-most band with overlying darker patches of reddish-brown, especially in sulcus. Rib crests mostly white, thus bands are mostly confined to the interspaces. Some spiral grooves colored reddish-brown; varical hump with a large yellowish-brown patch. Remarks. Taxonomy. Fenimorea tessellate has all the distinguishing characteristics of Fenimorea: a shell surface microsculpture of spiral threads and axial growth striae producing shallow “pits” in their interspaces, numerous low ribs that extend from suture-to-suture with the sulcus sharply demarcated on whorl shoulders, and a varix typical of other offshore members of the genus, narrow, not hump-like. Variability. The average length of 17 measured specimens is 29.20 mm (16.2–39.4 mm); their average W/ L ratio is 0.384. The size of specimens with fully developed lips ranges from 26.7 to 39.4 mm. Variability is seen in the color pattern, most strikingly in the lack of two white bands on the last whorl (Pl. 99, Fig. 9) and what is likely an all-white form (Pl. 99, Fig. 14). Identification. Fenimorea tessellata differs from F. fucata in its greater size and pattern of coloration. The random patches of brown on F. tessellata are mostly confined to the sulcus and do not “bleed” as far down into the rib interspaces as in F. fucata, but rather are confined to the margin of the band on the whorl’s shoulder. This latter species is rare in the Gulf, while F. tessellata appears to be largely confined to the Gulf. From the other large members of Fenimorea, F. j a ne t ae, F. kathyae, and F. sunderlandi it differs in having a more turreted profile (straighter sides), a scalloped lip edge, and a broader more distinct anal sulcus. The range of F. tessellata appears to only overlap that of F. sunderlandi, principally off W Florida. Although of a similar size to the F. janetae group, F. tessellata is more closely allied to F. fucata in shell shape and in coloration, if not in size. Etymology. The Tessellate Fenimorea. Named for the mosaic pattern of its coloration (from tessellata, Latin for mosaic).Published as part of Fallon, Phillip J., 2016, Taxonomic review of tropical western Atlantic shallow water Drilliidae (Mollusca: Gastropoda: Conoidea) including descriptions of 100 new species, pp. 1-363 in Zootaxa 4090 (1) on pages 206-208, DOI: 10.11646/zootaxa.4090.1.1, http://zenodo.org/record/26329
Fenimorea crocea Fallon, 2016, new species
No full textFenimorea crocea, new species (Plate 73) Type material. Holotype 15.6 x 6.0 mm, D. Steger! (UF 155640). Type locality. 225 km ENE of Alacran Reef, 190 km N of El Cuyo, Campeche Bank, off Yucatan State, Mexico, in 119 m. Range and habitat. Known only from the holotype. Description. Shell small (15.6 mm total length), fusiform with a tall spire, truncated anteriorly; of approximately 8 ¾ convex whorls that become more so anteriorly, last about 59 % of total shell length. Surface glossy, bold ribs the dominant sculptural element; aperture narrow. Protoconch approximately 2 whorls, eroded on holotype. Axial sculpture of low slightly opisthocline broad round-crested ribs that stretch from suture-to-suture on spire whorls, evanesce on shell base near anterior fasciole. Ribs tend to line up on early whorls, highest mid-whorl, are most angular on last; slightly narrower than their interspaces; number 9 on penultimate, 6 on last whorl to varix. Varix narrow, about ⅓-turn from the edge of the outer lip. Spiral sculpture of incised, regularly spaced grooves or threads made jagged by the intersection of fine, more closely spaced growth striae, creating rows of pits characteristic of Fenimorea. Sulcus concave, demarcated by the abrupt decrease in height of the ribs; ribs curved, low; spiral sculpture faint but present, masked by heavier curved growth striae. Outer lip thin, slightly flattened from varix, with 5 folds; edge smooth, not scalloped, bent inward. Edge of lip forms a low almost flat arc from and congruent with the anterior edge of the anal sinus to the stromboid notch, which is shallow. Anal sinus on shoulder close to suture, deep, U-shaped, entrance not constricted, or only slightly so. Inner lip narrow, thin, margined, slightly elevated anteriorly along canal, thinnest and recumbent on parietal wall, formed into a parietal lobe posteriorly at junction with outer lip. Anterior canal is moderately long, well defined, open, end turned slightly to the right when viewed ventrally, notched at its tip; anterior fasciole not swollen. Color base is saffron; intercostal spaces and band overriding ribs below periphery are golden brown. Remarks. Taxonomy. Fenimorea crocea has the principal characteristics of the genus: typical microsculpture, ribs that extend from suture-to-suture with a well-demarcated sulcus, and a deep U-shaped notch anal sinus. The varix is not hump-like, and the canal is moderately long, typical features of offshore, deep water species. Identification. Fenimorea crocea is similar to F. c o nt r a ct a, new species, F. t i p pe t t i, new species, F. petiti Tippett, 1995, and F. chaaci (Espinosa & Rolán, 1995). Its golden brown color offset with saffron ribs is similar to the color pattern of F. contracta but that species has fewer, more widely spaced ribs. From F. t ippet ti it differs in being smaller, stockier, and possessing a golden brown band, not a reddish brown one. The color pattern is also different. From F. petiti it differs in possessing a more distinct, wider sulcus, more angular whorls, spiral grooves, and a wider, more diffuse mid-whorl color band. From F. chaaci it differs in being smaller but with relatively larger and fewer ribs, a longer anterior canal, and a narrow, not hump-like varix. Fenimorea crocea has features characteristic of deep water species while C. chaaci those of shallow water. While this taxon is based on a single specimen, it exhibits important characteristics that separate it from its closest congeners as explained above. These differences are also not seen in any of their varients and so the specimen is believed to merit description as a separate species. Etymology. The Saffron-colored Fenimorea; named for the shell’s base color. From the Latin adjective croceus, feminine crocea, meaning saffron-colored.Published as part of Fallon, Phillip J., 2016, Taxonomic review of tropical western Atlantic shallow water Drilliidae (Mollusca: Gastropoda: Conoidea) including descriptions of 100 new species, pp. 1-363 in Zootaxa 4090 (1) on pages 157-158, DOI: 10.11646/zootaxa.4090.1.1, http://zenodo.org/record/26329
Fenimorea mackintoshi Fallon, 2016, new species
No full text<i>Fenimorea mackintoshi</i>, new species <p>(Plate 85)</p> <p> <b>Types.</b> Holotype 13.0 x 4.6 mm, G. Mackintosh!, 15 Mar 1996 (USNM 1291349); 15 paratypes: 1 spec., 12.5 x 4.6 mm, from type locality, G. Mackintosh!, 15 Mar 1996 (USNM 1291350); 13 spec: 13.7 x 5.1, 12.8 x 4.7, 13.9 x 5.1, 13.2 x 5.0 & 13.7 x 5.0 mm (ANSP 464990), 12.5 x 5.0, 13.4 x 4.8, 12.6 x 4.6, 13.4 x 5.2 mm (UF 496642), 12.3 x 4.6, 12.3 x 4.5, 12.3 x 4.4 & 15.3 x 5.5 mm (author’s coll.), in 6.4 m, S end of Highborne Cay, Exuma, Bahama Is., G. Mackintosh!, 17 Mar 1996; 1 spec., 14.9 x 5.9 mm, at 12 m, Start Bay, Mayaguana I., Bahama Is., G. Mackintosh!, 18 Feb 1993 (author’s coll.).</p> <p> <b>Type locality.</b> W side of Allen’s Cay, Exuma, Bahama Is., in 6.4 m.</p> <p> <b>Other material examined.</b> 1 spec., 13.1 x 5.0 mm, at 3 m, Honeymoon Cove, Gun Cay, Bimini Is., G. Mackintosh! 8 Apr 1994 (author’s coll.).</p> <p> <b>Range and habitat.</b> Bahama Is. (Gun Cay, Bimini Is.; Allan’s and Highborne Cays, Exuma; Mayaguana I.) in 3– 12 m.</p> <p> <b> Description. <i>Shell</i></b> small (to 15.3 mm), fusiform, truncated anteriorly, to approximately 9 whorls; body whorl large compared to spire whorls, approximately 58% of total shell height. <i>Protoconch</i> of 2 smooth round whorls, the first only slightly smaller in diameter than second. <i>Axial sculpture</i> of weak, narrow ribs on first, strong on second and succeeding whorls, extending from suture-to-suture, abruptly narrowed, arcuate, and reduced in the sulcus, forming a distinct shoulder at the edge of the sulcus. Ribs about as wide or less than their interspaces; most slightly opisthocline overall, 12–13 on the penultimate whorl, 7–11 to the varix on the body whorl. Microscopic growth striae are present throughout, but finer compared with other members of the genus. <i>Varix</i> broad, hump-like, ⅓-turn back from edge of outer lip. <i>Spiral sculpture</i> consisting of a microsculpture of fine parallel jagged lines closely spaced in sulcus, more widely spaced anterior to the shoulder (approximately 4/mm on body whorl), together with fine axial striae that form shallow pits on shell surface. <i>Sulcus</i> wide, about ¼- to ⅓-whorl height; slightly convex with rib traces curved in an arc reflecting the outline of the anal sinus. <i>Outer lip</i> thin, smooth-edged, forming a gentle continuous curve from the anal sinus to the canal tip; strengthened by up to four irregular axial folds between the varix and edge of outer lip; not toothed but with small crenulations along its inside edge; stromboid notch shallow. <i>Anal sinus</i> deep, sinus angled away from the suture by a parietal callus. <i>Inner lip</i> margined; thickest on the anterior canal, thin in the parietal area, and forming a thick parietal callus near the junction with the outer lip. <i>Anterior canal</i> short, deeply channeled and notched; twisted to the left viewed ventrally; anterior fasciole slightly swollen, its surface marked by spiral ridges. <i>Color</i> an uneven brown with lighter and darker areas, except apex (protoconch and first teleoconch whorl), anterior fasciole, and distal end of anterior canal, which are white. Darker brown in a band on the top of the shoulder and between the ribs; rib crests and anterior halves of the whorls lighter brown. Some specimens have irregular patches of white or broken white bands.</p> <p> <b> Remarks. <i>Taxonomy.</i></b> Fenimorea mackintoshi exhibits all of the critical characteristics of <i>Fenimorea</i>: numerous ribs from suture-to-suture but transformed in the sulcus, surface microsculpture typical for the genus, and varix hump-like about ⅓-turn from the edge of the outer lip. It is unique for the genus in its coloration and in possessing a relatively narrow shell. <i>Variability.</i> The specimens vary little in color; some exhibit faint white bands on whorl shoulder or irregular patches, but otherwise quite uniform. The average length of 17 measured specimens is 13.23 mm (12.3–15.3 mm), their average W/ L ratio is 0.372. The specimens vary by only 3 mm in length, and are relatively slim for the genus. <i>Identification.</i> Specimens of <i>F. mackintoshi</i> first appear to be small or oddlycolored <i>F. f u ca t a</i> because of its similarity in shell sculpture and color; however, it differs in a number of ways. The protoconch whorls are more evenly sized, not tapering; the teleoconch is slenderer; the microscopic spiral lines are not as numerous and variable as in <i>F. f u c at a</i>; the axial growth lines are not as prominent; and the outer lip lacks projecting teeth. From <i>F. jongreenlawi</i>, new species and <i>F. caysalensis</i>, new species it differs in size, shell shape, shell microsculpture, and in coloration.</p> <p> <b>Etymology.</b> Gary Mackintosh’s <i>Fenimorea</i>. Named for Gary Mackintosh who collected all of the specimens studied here, and for the contribution to science his efforts have yielded.</p>Published as part of <i>Fallon, Phillip J., 2016, Taxonomic review of tropical western Atlantic shallow water Drilliidae (Mollusca: Gastropoda: Conoidea) including descriptions of 100 new species, pp. 1-363 in Zootaxa 4090 (1)</i> on page 181, DOI: 10.11646/zootaxa.4090.1.1, <a href="http://zenodo.org/record/263299">http://zenodo.org/record/263299</a>
- …
