57,513 research outputs found
Terebralia marki DeVries 2019, sp. nov.
No full text<i>Terebralia marki</i> sp. nov. (Figure 4 (cc)) <p> <i>Diagnosis</i></p> <p>Spiral ribs strongly opisthocline; six primary spiral cords weakly crossing axial ribs; no peripheral cord exposed near anterior suture.</p> <p> <i>Description</i></p> <p>Shell fragment small, length less than 10 mm, thick. Elongate, pleural angle about 15°. Protoconch partly preserved but windblasted; probably multispiral, conical. Evidence of five whorls preserved; flat-sided, sutures impressed. All spire whorls with six rounded primary spiral cords lightly crossing about 14 very strong rounded axial ribs; ribs straight, opisthocline. Spiral cords interspaces V-shaped, much narrower than spiral cords; axial rib interspaces almost as wide as axial ribs. Anterior end of last whorl, base unknown. Aperture circular. Columella without folds. Varices and ventrolateral varix absent. Inner and outer lip unknown.</p> <p> <i>Remarks</i></p> <p> This single specimen of <i>Terebralia marki</i> sp. nov. has more than the four spiral cords that are present on the specimen of <i>T. pauli</i> and that are typically present on species of <i>Terebralia</i> (but see extant <i>T. semistriata</i> (Mörch, 1852), which has five or six spiral cords).</p> <p> <i>Etymology</i></p> <p>Named in recognition of Mark C. DeVries, brother of the author.</p> <p> <i>Material</i></p> <p>UWBM 107600, holotype, B8771 (type locality), L (9.8), W (5.1).</p> <p> <i>Occurrence</i></p> <p>Lower Paleogene, Cuenca Member, Caballas Formation, East Pisco Basin, southern Peru.</p>Published as part of <i>DeVries, Thomas J., 2019, Early Paleogene brackish-water molluscs from the Caballas Formation of the East Pisco Basin (Southern Peru), pp. 1533-1584 in Journal of Natural History 53 (25)</i> on pages 1563-1564, DOI: 10.1080/00222933.2018.1524032, <a href="http://zenodo.org/record/3670229">http://zenodo.org/record/3670229</a>
Potamides janeae DeVries 2019, sp. nov.
No full text<i>Potamides janeae</i> sp. nov. (Figure 4 (r <i>–</i> t)) <p> <i>Diagnosis</i></p> <p>Shell with broadly conical spire. Whorls with three beaded spiral cords. Varices and ventrolateral varix absent. Columella with single fold.</p> <p> <i>Description</i></p> <p>Estimated shell length 15 mm; conical, spire angle about 25°. Protoconch unknown. Spire with at least eight whorls. Whorls flat-sided, sutures thinly incised, recessed. All preserved whorls with three beaded spiral cords. Medial spiral cord narrow, with smallest beads, and close to anterior cord. Beads nodular, spherical, aligned axially in nearly orthocline rectilinear ribs. Base of whorl demarcated by weakly beaded strong spiral cord, with adaxially adjacent, smooth, strong, quadrate spiral cord and weak third spiral cord close to axis. Remainder of base with convex axial threads. Columella with single fold anterior to midpoint. Anterior and posterior canal, if present, and outer lip not preserved.</p> <p> <i>Etymology</i></p> <p>Named in honour of Jane Cody DeVries, mother of the author.</p> <p> <i>Material</i></p> <p>All material from B8771 (type locality). UWBM 107579, holotype, L (9.0), W (5.1); remainder are paratypes: UWBM 107580, L (9.5), W (5.0); UWBM 107581, L (4.1), W (5.0); UWBM 107634, L (4.9), W (4.6); MUSM INV 248, L (8.0), W (5.0); MUSM INV 249, L (8.8), W (4.1)</p> <p>.</p> <p> <i>Remarks</i></p> <p> Specimens of <i>Potamides janeae</i> sp. nov. differ from those of <i>P. henryi</i> sp. nov. by having only three spiral cords, instead of four, and by having unbeaded spiral cords on the base.</p> <p> <i>Occurrence</i></p> <p>Lower Paleogene, Cuenca Member, Caballas Formation, East Pisco Basin, southern Peru.</p>Published as part of <i>DeVries, Thomas J., 2019, Early Paleogene brackish-water molluscs from the Caballas Formation of the East Pisco Basin (Southern Peru), pp. 1533-1584 in Journal of Natural History 53 (25)</i> on page 1558, DOI: 10.1080/00222933.2018.1524032, <a href="http://zenodo.org/record/3670229">http://zenodo.org/record/3670229</a>
Caballasea DeVries 2019, gen. nov.
No full textGenus Caballasea gen. nov. Type species: Caballasea segmentata sp. nov. Early Paleogene, southern Peru. Species included: Caballasea segmentata sp. nov., Pachychilus (Pachychiloides) lawtoni Perrilliat et al., 2008. Diagnosis Shell small, elongate; sutures canaliculate. Teleoconch whorls with axial ribs, rounded or erect as flanges. Aperture elongate. Outer lip not thickened; short, well-defined, very shallow anterior canal present; posterior canal absent. No varices or ventrolateral varix. Remarks In Peru, Caballasea gen. nov. is known from just one species, Caballasea segmentata sp. nov. In most characters, the Caballas Formation species resembles Pachychilus (Pachychiloides) lawtoni Perrilliat et al., 2008; a common species in Eocene fluvial red and green mudstones of the Carroza Formation of Mexico (Perrilliat et al. 2008). The Carroza Formation specimens, for which no complete apertures are preserved, may not be properly placed in Pachychilidae. All modern pachychilids, excepting Faunus ater (Linnaeus, 1758), have apertures without anterior or posterior canals (Glaubrecht and von Rintelen 2003). This absence of apertural canals is true for P. (Pachychiloides) cleburni (White, 1876) from the Cretaceous Bear River Formation of Wyoming, a species with which Perrilliat et al. (2008) compared P. (Pachychiloides) lawtoni. The Eocene Caballasea segmentata, however, which so closely resembles the Carroza Formation species, has a short and very shallow anterior canal. It is proposed herein that Pachychilus lawtoni from the Carroza Formation and Caballasea segmentata from the Caballas Formation are congeneric and that Pachychilus lawtoni be transferred to Caballasea. The two species of Caballasea are assigned to Potamididae based on the presence of an anterior canal. Etymology ’ Caballas ’, referencing the lithostratigraphic unit in which the genus is found. Occurrence Eocene, Mexico; Lower Paleogene, Cuenca Member, Caballas Formation, East Pisco Basin, southern Peru.Published as part of DeVries, Thomas J., 2019, Early Paleogene brackish-water molluscs from the Caballas Formation of the East Pisco Basin (Southern Peru), pp. 1533-1584 in Journal of Natural History 53 (25) on pages 1566-1567, DOI: 10.1080/00222933.2018.1524032, http://zenodo.org/record/367022
Potamides henryi DeVries 2019, sp. nov.
No full text<i>Potamides henryi</i> sp. nov. (Figure 4 (m <i>–</i> q)) <p> <i>Diagnosis</i></p> <p>Shell with narrow spire. Whorls with four beaded primary spiral cords, posteriormost strongest; later whorls often with additional one to three beaded secondary spiral cords. Varices and ventrolateral varix absent. Columella with single fold.</p> <p> <i>Description</i></p> <p> Estimated shell length 15 <i>–</i> 20 mm; elongate, spire slightly convex, spire angle about 16°. Protoconch poorly preserved. Spire with about eight whorls. Whorls flat-sided, sutures thinly incised, recessed. Earliest teleoconch whorls with three beaded spiral cords. Later whorls with four beaded spiral cords: posteriormost widest, adjacent to posterior suture, with axially elongate beads; anteriormost cord, nearly adjacent to suture, second widest, with spherical or spirally elongate oval beads; second cord from the anterior suture third widest, with small, partly separated spherical beads; and second cord from the posterior margin most narrow, with separated spirally elongate oval beads; lattermost spiral cord strengthens on last whorls to match strength of second most anterior cord. Secondary beaded spiral cord usually present between two posteriormost primary spiral cords; rarely with intercalation of other beaded secondary spiral threads. Anterior suture bordered with barely visible beaded spiral cord marking edge of base; latter spiral cord bordered adaxially by rounded groove with medial thread, strong spiral cord with radially elongate beads, at least one thin spiral cord near axis, and convex axial threads. Varices and ventrolateral varix absent. Columella with single fold posterior to midpoint. Inner lip with erect flange arising from parietal area; anterior end not preserved. Outer lip flaring with terminal varix but poorly preserved.</p> <p> <i>Remarks</i></p> <p> Specimens of <i>Potamides henryi</i> sp. nov., which occur together with specimens of <i>P. janeae</i> sp. nov., are generally more elongate and the spires more convexly conical than those of <i>P. janeae</i>. Specimens of <i>P. henryi</i> have four or more beaded primary cords, rather than the three beaded spiral cords on specimens of <i>P. janeae</i>, and have beaded spiral cords on the base.</p> <p> <i>Material</i></p> <p>UWBM 107582, holotype, B8772 (type locality), L (17.8), W (6.9); remainder are paratypes: UWBM 107583, B8772, L (14.9), W (6.3); UWBM 107584, B8772, L (15.2), W (6.6); UWBM 107585, B8772, L (12.6), W (6.0); UWBM 107586, B8771, L (11.2), W (6.0); UWBM 107587, B8769, L (9.5), W 6.9; UWBM 107588, B8769, L (11.7), W (5.7); UWBM 107650, B8770, L (15.4), W (7.4); MUSM INV 250, B8772, L (14.0), W (7.9); MUSM INV 251, B8772, L (15.8), W (7.7); MUSM INV 252, B8772, L (10.0), W (5.6</p> <p>).</p> <p> <i>Etymology</i></p> <p>Named in honour of Henry R. DeVries, father of the author.</p> <p> <i>Occurrence</i></p> <p>Lower Paleogene, Cuenca Member, Caballas Formation, East Pisco Basin, southern Peru.</p>Published as part of <i>DeVries, Thomas J., 2019, Early Paleogene brackish-water molluscs from the Caballas Formation of the East Pisco Basin (Southern Peru), pp. 1533-1584 in Journal of Natural History 53 (25)</i> on pages 1557-1558, DOI: 10.1080/00222933.2018.1524032, <a href="http://zenodo.org/record/3670229">http://zenodo.org/record/3670229</a>
Turritella capistrata DeVries 2019, sp. nov.
No full text<i>Turritella capistrata</i> sp. nov. (Figure 5 (f), 5(g)) <p> <i>Diagnosis</i></p> <p>Whorls imbricate, with three strong primary spiral cords, nearly evenly spaced between sutures. Lateral growth line prosocline with anterior inflexion only.</p> <p> <i>Description</i></p> <p> Estimated shell length to 25 mm, pleural angle about 19°. Protoconch unknown. Spire with about 10 whorls. Earliest preserved whorls straight-sided to concave, imbricate; spiral formula C1A1 and subsequently D2C1B2A1. Later whorls imbricate with strong primary spirals and insertion of secondary spirals; successive formulae D2C 1t 3B2s3A1r3 and D2C 1t 3B2s3s4A1r3r4; primary spiral <i>‘</i> D <i>’</i> variably exposed, primary spiral <i>‘</i> B <i>’</i> sometimes weaker than primary spirals <i>‘</i> A <i>’</i> and <i>‘</i> C <i>’</i>. Spacing formula C27B46A77 (n = 4). Lateral growth line orthocline to slightly prosocline, inflected anteriorly only. Lateral sinus moderately deep, apex situated close to spiral <i>‘</i> B <i>’</i>. Base convex with at least two spirals, basal growth line probably radial, but base mostly obscured. Allmon formula 2?-4-S-B-OR.</p> <p> <i>Remarks</i></p> <p> Specimens of <i>Turritella capistrata</i> sp. nov. most closely resemble those of <i>T. desolata</i> Olsson, 1944, a late Maastrichtian species from the Tortuga Formation in the Sechura Basin of northern Peru (Olsson 1944; Jaillard et al. 2005) and the Upper Cretaceous Chonta Formation of eastern Peru (Singewald 1926; Pilsbry 1944; CGS Consultores Associados S.A 1997; Leon et al. 1997). The Tortuga Formation species has a smaller pleural angle (12°; n = 2) and is larger (> 50 mm; Olsson 1944) than the Caballas Formation species, but the spiral sculpture is identical.</p> <p> <i>Etymology</i></p> <p> <i>‘</i> Capistrata <i>’</i>, Latin adjective for <i>‘</i> bound <i>’</i>, referencing the seeming binding of each capstan-like whorl with coils of rope.</p> <p> <i>Material</i></p> <p>UWBM 107601, holotype, B8770 (type locality), L (14.4), W 8.6; remainder are paratypes: UWBM 107603, B8770, L 24.0, W 7.1; UWBM 107604, B8770, L (18.5), W 10.4; MUSM INV 259, B8772, L (16.3), W (7.5); MUSM INV 260, B8770, L (21.5), W (8.3)</p> <p>.</p> <p> <i>Occurrence</i></p> <p>Lower Paleogene, Cuenca Member, Caballas Formation, East Pisco Basin, southern Peru.</p>Published as part of <i>DeVries, Thomas J., 2019, Early Paleogene brackish-water molluscs from the Caballas Formation of the East Pisco Basin (Southern Peru), pp. 1533-1584 in Journal of Natural History 53 (25)</i> on pages 1568-1569, DOI: 10.1080/00222933.2018.1524032, <a href="http://zenodo.org/record/3670229">http://zenodo.org/record/3670229</a>
DeVries, P. J. — The Butterflies of Costa Rica and their Natural History. Papilionidae, Pieridae, Nymphalidae. Princeton University Press, Princeton, N. J. et Guilford, Surrey, U.K., 1987
No full textBourlière François. DeVries, P. J. — The Butterflies of Costa Rica and their Natural History. Papilionidae, Pieridae, Nymphalidae. Princeton University Press, Princeton, N. J. et Guilford, Surrey, U.K., 1987. In: Revue d'Écologie (La Terre et La Vie), tome 43, n°1, 1988. p. 99
Papposilenus utriculus DeVries 2019, sp. nov.
No full textPapposilenus utriculus sp. nov. (Figure 4 (u, v, x)) Diagnosis Characters as for genus; two anterior spiral cords on earliest teleoconch whorls unbeaded. Description Estimated shell length about 30 mm, stoutly conical, spire angle about 35°. Protoconch unknown. Spire with about nine whorls. Whorls flat-sided or slightly convex, sutures thinly incised, recessed. All preserved whorls with three spiral cords. Posteriormost spiral cord strongest, beaded on very early whorls, beads rhombohedral, flattened or nodular, with long axis parallel to shell axis and sides prosocline. Two anterior spiral cords slightly narrower, equal in size to each other, divided by thin incision on early whorls, not beaded. Last three or four whorls with all cords fully beaded; beads aligned, producing orthocline to slightly prosocline axial groove, broadly sulcate medially. Spire varices absent. Base poorly preserved; with at least four unbeaded or weakly beaded spiral cords separated by equally wide interspaces. Columella without folds. Outer lip flared from posterior attachment point but mostly not preserved. Anterior canal strongly recurved but mostly not preserved. Remarks Specimens of the early Eocene Papposilenus utriculus sp. nov. differ in few respects from the widely distributed Miocene P. suprasulcatus. The Eocene species usually has a more strongly opisthocyrt growth line, wider interspaces between the beaded cords, and beads that are more spirally elongate. Etymology ‘ Utriculus ’, wineskin, a leather bag made from goat hide used to dispense wine; its profile is like that of the shell of Papposilenus. Material UWBM 107589, holotype, B8772 (type locality), L (25.5), W (15.0); remainder are paratypes: UWBM 107590, B8770, L (17.6), W (12.5); UWBM 107592, B8772, L (18.7), W (12.0); MUSM INV 253, B8770, L (25.3), W (12.9); MUSM INV 254, B8769, L (22.6), W (12.9). Occurrence Lower Paleogene, Cuenca Member, Caballas Formation, East Pisco Basin, southern Peru.Published as part of DeVries, Thomas J., 2019, Early Paleogene brackish-water molluscs from the Caballas Formation of the East Pisco Basin (Southern Peru), pp. 1533-1584 in Journal of Natural History 53 (25) on pages 1560-1561, DOI: 10.1080/00222933.2018.1524032, http://zenodo.org/record/367022
Bia actorion subsp. ecuatoria DeVries & Penz, NEW SSP.
No full textBia actorion ecuatoria DeVries & Penz, NEW SSP. (Figs 3 c–d, 10b, 12) Diagnostic description. Defined by the following combination of characters: (1) MF DFW white apical ocelli medium-small (larger in F). (2) MF DFW orange band medium-wide; orange scales somewhat extended proximally along veins. (3) M DFW iridescent band from anal margin to approximately half of the CuA2 cell. F DFW blue iridescence well developed but variable; usually extended across the entire DC, diffuse anteriorly; usually visible at the CuA1-CuA2 intersection; below the discal cell, the iridescent area is wide and it spreads towards the tornus. F seems indistinguishable from actorion actorion. (4) M DFW androconial organ on the CuA- CuA1-CuA2 intersection dark brown, matching scale color of surrounding area. (5) DHW discal androconial pad chocolate-brown, comparable in color to the associated hairpencil. (6) M DHW discal hairpencil dark brown. (7) F VFW ripple pattern of the postmedial area clearly less dense than that of M. Etymology. This taxon is named after the country of Ecuador. Type material. Holotype M (Fig. 3 c), deposited in the PJD collection, two labels separated by // and transcribed verbatim: Ecuador: Prov. Sucumbios, Garza Cocha—Anyañgu, 175km E.S. E. of Coca, 6 Aug 1993, P. DeVries, T. R. Walla & H. Greeny, Trap: 15 und // HOLOTYPE Bia actorion ecuatoria Penz & DeVries, 2017. Paratypes are listed in Appendix, and Fig. 3 d shows a paratype F from the same locality as the holotype. Distribution and examined specimens. Fig. 12 and Appendix. Remarks. The dorsal hind wing androconial pads are paler than expected in two specimens collected in areas near Iquitos (Peru; CMNH collection, Appendix), resembling those of rebeli. Photographs of specimens from Colombia, Leticia and San Vicente del Caguán provided by Gonzalo Andrade fit the description above (complete label data in Appendix).Published as part of Penz, Carla M., Casagrande, Mirna M., Devries, Phil & Simonsen, Thomas J., 2017, Documenting diversity in the Amazonian butterfly genus Bia (Lepidoptera, Nymphalidae), pp. 201-237 in Zootaxa 4258 (3) on page 209, DOI: 10.11646/zootaxa.4258.3.1, http://zenodo.org/record/56972
Papposilenus DeVries 2019, gen. nov.
No full textPapposilenus gen. nov. Type species: Cerithium suprasulcatum Gabb, 1873. Oligocene, Dominican Republic. Species included: Cerithium suprasulcatum, Gabb, 1873; Potamides ormei Maury, 1917; Potamides infraliratus Spieker, 1922; Papposilenus utriculus sp. nov. Diagnosis Broadly convex spire. Three beaded spiral cords on later teleoconch whorls; beads quadrate, flattened. Varices and ventrolateral varix absent. Outer lip flaring, thickened. Columella without fold. Description Shell medium size, spire broad, weakly or moderately convex. Protoconch unknown. Sutures thinly incised, impressed. All whorls with three spiral cords, posteriormost cord strongest. Early teleoconch whorls with anteriormost cord beaded, other two cords beaded or not. Later whorls with all three cords beaded; beads quadrate, low or flattened, producing tessellated surface; posterior row of beds may be axially elongate. Spaces between beads aligned across spiral cords to form opisthocyrt axial groove coincident with growth lines; growth lines medially broadly sulcate. Varices and ventrolateral varix absent. Base with six or seven unbeaded spiral cords; cords closest to periphery with incipient beading. Outer lip thickened, flaring posteriorly, with groove emerging posteriorly and abaxially but without becoming a posterior canal. Anterior canal short, straight, excavated, twisted from an axial to transverse orientation, positioned well posterior to broad spatulate anterior margin of outer lip. Columella short, smooth; parietal area with moderately thick callus. Remarks Woodring (1959: 177) listed characters shared by Potamides suprasulcatus, the type species of Papposilenus gen. nov., and Potamides lamarckii, the type species of Potamides, namely, the absence of varices on the spire, the absence of a ventrolateral varix, and the presence of a broadened outer lip and twisted anterior canal. Woodring (1959) also noted characters not shared: the coarsely beaded sculpture and the thickened outer lip of P. suprasulcatus. Woodring (1959, 177) included four Miocene potamidids in his ‘ suprasulcatus ’ group, but none resemble Papposilenus suprasulcatus, nor the Caballas Formation species of Papposilenus described below, nor Potamides, sensu Reid et al. (2008). Specimens of the Haitian Potamides roumaini Pislbry, 1910 have strong unbeaded spiral cords on all but the earliest spire whorls. Specimens of the Haitian Potamides caobasensis Pilsbry, 1910 are smooth on all whorls, except a prominent sutural ledge. Specimens of the Haitian Potamides tippenhaueri Woodring and Mansfield, 1924 have a keeled, unbeaded, posterior spiral cord on all whorls and two anteriorly situated beaded spiral cords. Specimens of Potamides matsoni Dall, 1913, from the southeastern USA, have a relatively narrow spire and wide interspaces between several unbeaded spiral cords. Potamidid taxa referred herein to Papposilenus had already been synonymised with Potamides suprasulcatus, including a Miocene species from Venezuela synonymised by Hedberg (1937) and Miocene species across the Caribbean and northern South America synonymised by Woodring (1959), including Potamides ormei Maury, 1917 (the Dominican Republic and Colombia; Weisbord 1929), Potamides ormei var. infraliratus Spieker, 1922 (Peru; Olsson 1932), and Potamides infraliratus (Ecuador; Marks 1951). The discovery of Paleogene potamidids in southern Peru with broad spires and three coarsely tessellated spiral cords shows that the ‘suprasulcatus’ morphology spanned almost 40 million years while remaining restricted geographically to the Caribbean, northern South America, and north-western South America. Etymology ‘ Papposilenus ’, the elderly incarnation of the drunken, bald, overweight tutor and drinking companion of Bacchus, the god of wine; referencing the short, stout, coarsely featured taxa assigned to this genus. Occurrence Lower Paleogene, Cuenca Member, Caballas Formation, East Pisco Basin, southern Peru; Miocene, Florida through the Caribbean and to northern Peru.Published as part of DeVries, Thomas J., 2019, Early Paleogene brackish-water molluscs from the Caballas Formation of the East Pisco Basin (Southern Peru), pp. 1533-1584 in Journal of Natural History 53 (25) on pages 1558-1560, DOI: 10.1080/00222933.2018.1524032, http://zenodo.org/record/367022
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
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