11,037 research outputs found
Christopher Roterman (OXU) - Fine-scale Population Genetics of Cidaroid Urchins in the NE Atlantic
No full textChristopher Roterman (OXU) presented Fine-scale Population Genetics of Cidaroid Urchins in the NE Atlantic at the 4th ATLAS General Assembly.</p
A new genus of large hydrothermal vent-endemic gastropod (Neomphalina: Peltospiridae)
No full textRecently discovered hydrothermal vent fields on the East Scotia Ridge (ESR, 56–60°S, 30°W), Southern Ocean, and the South West Indian Ridge (SWIR, 37°S 49°E), Indian Ocean, host two closely related new species of peltospirid gastropods. Morphological and molecular (mitochondrial cytochrome c oxidase subunit I, COI) characterization justify the erection of Gigantopelta gen. nov. within the Peltospiroidae with two new species, Gigantopelta chessoia sp. nov. from ESR and Gigantopelta aegis sp. nov. from SWIR. They attain an extremely large size for the clade Neomphalina, reaching 45.7?mm in shell diameter. The oesophageal gland of both species is markedly enlarged. Gigantopelta aegis has a thick sulphide coating on both the shell and the operculum of unknown function. The analysis of a 579-bp fragment of the COI gene resulted in 19–28% pairwise distance between Gigantopelta and six other genera in Peltospiridae, whereas the range amongst those six genera was 12–28%. The COI divergence between the two newly described species of Gigantopelta was 4.43%. Population genetics analyses using COI (370?bp) of 30 individuals of each species confirmed their genetic isolation and indicate recent rapid demographic expansion in both species. <br/
Figure 9. Consensus tree reconstructed from a 489 in A new genus of large hydrothermal vent-endemic gastropod (Neomphalina: Peltospiridae)
No full textFigure 9. Consensus tree reconstructed from a 489-bp fragment of the cytochrome c oxidase subunit I gene using Bayesian inference. Node values represent Bayesian posterior probabilities.Published as part of Chen, Chong, Linse, Katrin, Roterman, Christopher N., Copley, Jonathan T. & Rogers, Alex D., 2015, A new genus of large hydrothermal vent-endemic gastropod (Neomphalina: Peltospiridae), pp. 319-335 in Zoological Journal of the Linnean Society (Zool. J. Linn. Soc.) 175 (2) on page 330, DOI: 10.1111/zoj.12279, http://zenodo.org/record/533841
Interview with Nicholas Christopher, author of Somewhere in the Night: Film Noir and the American City
No full textInterview with Nicholas Christopher, author of Somewhere in the Night: Film Noir and the American Cit
Figure 5 in A new genus of large hydrothermal vent-endemic gastropod (Neomphalina: Peltospiridae)
No full textFigure 5. Protoconchs: A, Gigantopelta chessoia sp. nov., scale bar = 100 μm; B, Gigantopelta aegis sp. nov., scale bar = 100 μm. Juvenile operculum: C, G. chessoia sp. nov., scale bar = 500 μm; D, G. aegis sp. nov., scale bar = 500 μm.Published as part of Chen, Chong, Linse, Katrin, Roterman, Christopher N., Copley, Jonathan T. & Rogers, Alex D., 2015, A new genus of large hydrothermal vent-endemic gastropod (Neomphalina: Peltospiridae), pp. 319-335 in Zoological Journal of the Linnean Society (Zool. J. Linn. Soc.) 175 (2) on page 325, DOI: 10.1111/zoj.12279, http://zenodo.org/record/533841
Figure 6 in A new genus of large hydrothermal vent-endemic gastropod (Neomphalina: Peltospiridae)
No full textFigure 6. Radula. Overview: A, Gigantopelta chessoia sp. nov.; B. Gigantopelta aegis sp. nov.; scale bars = 100 μm. Central and lateral teeth close-up: C, G. chessoia sp. nov.; D, G. aegis sp. nov.; scale bars = 20 μm. Marginal teeth close-up: E, G. chessoia sp. nov.; F. G. aegis sp. nov.; scale bars = 10 μm.Published as part of Chen, Chong, Linse, Katrin, Roterman, Christopher N., Copley, Jonathan T. & Rogers, Alex D., 2015, A new genus of large hydrothermal vent-endemic gastropod (Neomphalina: Peltospiridae), pp. 319-335 in Zoological Journal of the Linnean Society (Zool. J. Linn. Soc.) 175 (2) on page 326, DOI: 10.1111/zoj.12279, http://zenodo.org/record/533841
Gigantopelta Chen & Linse & Roterman & Copley & Rogers 2015, GEN. NOV.
No full textGIGANTOPELTA GEN. NOV. <p> <i>Type species</i></p> <p> <i>Gigantopelta chessoia</i> sp. nov., by original designation.</p> <p> <i>Etymology</i></p> <p>Giganteus (Latin), gigantic; Pelta (Latin), shield. This refers to the extremely large adult shell size of the species in this genus for the family Peltospiridae. The genus name is feminine.</p> <p> <i>Zoobank registration</i> urn:lsid:zoobank.org:act: C25960CA-B974-452C-AE24- B128FF1CEA0F</p> <p> <i>Diagnosis</i></p> <p>Shell extremely large for family, reaching 45 mm in adult shell length. Shell globose, rather loosely coiled with deep suture, three to four whorls. Spire depressed. Protoconch consisting of 0.5 whorls. Aperture very large, circular, expanding rapidly. Thick, dark olive periostracum enveloping edge of aperture. Shell milky white and thin, not nacreous. Columellar folds lacking. Concentric, multispiral operculum present. Foot large. Cephalic tentacles thick, broad, triangular, thinning towards tips. Eyes lacking. Snout tapering and thick. Oesophageal gland hypertrophied. Single, bipectinate ctenidium. Sexes separate. Epipodial tentacles present surrounding operculum. Radula rhipidoglossate, formula ∼50 + 4 + 1 + 4 + ∼50. Central, lateral teeth strong, solid with smooth cusps. Marginal teeth long, slender, truncate, divided into about 20 toothlets towards distal end.</p> <p> <i>Remarks</i></p> <p> Adult <i>Gigantopelta</i> are easily distinguished from all other described peltospirids by their extremely</p> <p> <i>COI</i>, cytochrome c oxidase subunit I</p> <p> large shell size. Furthermore, <i>Gigantopelta</i> can be distinguished from the limpet-like peltospirid genera <i>Ctenopelta</i> Warén & Bouchet, 1993, <i>Echinopelta</i> McLean, 1989, <i>Hirtopelta</i> McLean, 1989, <i>Nodopelta</i> McLean, 1989, and <i>Rhynchopelta</i> McLean, 1989, by having a coiled shell with three to four whorls. It can be distinguished from the three skeneiform genera, <i>Pachydermia</i> Warén & Bouchet, 1989, <i>Depressigyra</i> Warén & Bouchet, 1989, and <i>Lirapex</i> Warén & Bouchet, 1989, by its inflated form with a much more depressed spire and larger aperture. The shell surface is nearly smooth, which differs from all peltospirid genera except <i>Depressigyra</i>. The shell roughly resembles that of <i>Peltospira</i>, but has a more tightly coiled initial whorl, and lacks lamellar sculpture. Analysis of the soft parts shows an enlarged oesophageal gland, a feature previously only known from the ‘scaly-foot gastropod’ <i>Chrysomallon squamiferum</i> Chen <i>et al</i>., 2015 (Warén <i>et al</i>., 2003; Chen <i>et al</i>., 2015), which is also the only other known peltospirid to attain a similar size. In <i>C. squamiferum</i> the oesophageal gland houses symbiotic bacteria, but it is unclear whether this is also the case for <i>Gigantopelta</i>. <i>Gigantopelta</i> can be distinguished from <i>Chrysomallon</i> easily as it does not possess dermal sclerites, has a large operculum, and a shell that is less vertically compressed, with a more circular aperture. The shell of <i>Gigantopelta</i> may be coated in a layer of sulphide, which is frequent amongst vent gastropods including the neomphalins (Hickman, 1984; Warén & Bouchet, 2001). <i>Gigantopelta</i> is also comparable to the Oligocene fossil genus <i>Elmira</i> Cooke, 1919, from a seep deposit near Bejucal, Cuba whose possible affinity to Neomphalina based on resemblance to <i>Chrysomallon</i> was remarked upon by Kiel & Peckmann (2007). Although the type species <i>Elmira cornuarietis</i> Cooke, 1919, is approximately the same size as <i>Gigantopelta</i> (> 40 mm in shell length), it carries broad revolving grooves, which <i>Gigantopelta</i> lacks. The true taxonomic affinity of <i>Elmira</i> is still unclear.</p>Published as part of <i>Chen, Chong, Linse, Katrin, Roterman, Christopher N., Copley, Jonathan T. & Rogers, Alex D., 2015, A new genus of large hydrothermal vent-endemic gastropod (Neomphalina: Peltospiridae), pp. 319-335 in Zoological Journal of the Linnean Society (Zool. J. Linn. Soc.) (Zool. J. Linn. Soc.) 175 (2)</i> on pages 322-323, DOI: 10.1111/zoj.12279, <a href="http://zenodo.org/record/5338416">http://zenodo.org/record/5338416</a>
Gigantopelta aegis Chen & Linse & Roterman & Copley & Rogers 2015, SP. NOV.
No full textGIGANTOPELTA AEGIS SP. NOV. (FIGS 2–7) <p> <i>Type material</i></p> <p> Holotype. Shell diameter 37.61 mm, 99% ethanol, Figure 3D–F. Longqi vent field, Southwest Indian Ridge, 37°47.03′S, 49°38.97′E (‘Tiamat’), 2785 m deep, RRS <i>James Cook</i> expedition JC67, ROV <i>Kiel 6000</i> Dive 142, 29.xi.2011, leg. J. T. Copley (NHMUK 20150070). Paratypes. One dissected specimen, 99% ethanol (shell diameter 35.24 mm, Fig. 4C, D; NHMUK 20150071); growth series of five specimens, 99% ethanol (NHMUK 20150072); growth series of five specimens, 99% ethanol OUMNH. ZC. 2013.02.003); two specimens, 99% ethanol (CAMZM 2015.3.1 -2); growth series of five specimens (SMNH Type Collection 8451). All paratypes above have the same collection data as holotype. Five specimens, 10% buffered formalin (NHMUK 20150073): Longqi vent field, Southwest Indian Ridge, 37°47.03′S, 49°38.96′E (‘Tiamat’ chimney), 2783 m deep, RRS <i>James Cook</i> expedition JC67, ROV <i>Kiel 6000</i> Dive 140, 27.xi.2011, leg. J. T. Copley (NHMUK 20150073).</p> <p> <i>Other material examined</i></p> <p>Approximately 200 specimens, same collection data as the holotype.</p> <p> <i>Etymology</i></p> <p>Aegis (Latin), the shield of Zeus and Athena. The specific name is an allusion of the thick and large sulphidecovered operculum to the mythical shield.</p> <p> <i>Zoobank registration</i> urn:lsid:zoobank.org:act: 45E3E373-E126-4179-B1EB- D583FCFB3D12)</p> <p> <i>Description/Diagnosis</i></p> <p> <i>Shell:</i> Shell (Fig. 4B) globose, three to four whorls, trochiform to neritiform. Spire depressed. Aperture holostomous. Tightly coiled. Suture deep. Aperture very large, circular, body whorl to aperture length ratio approximately 1:0.65 (average of 100 specimens). Protoconch (Fig. 5B) 0.5 whorls, about 210 μm in length, sculpture unknown (surface layer of examined specimens affect- ed by dissolution). Thick, orange to reddish sulphide layer covers periostracum. Periostracum dark olive with sulphides removed. Ostracum milky white. Ostracum thin, fragile without sulphide and periostracum. Periostracum slightly recurved at aperture. Columellar folds lacking. Callus extends extensively, covering columellar region. Area around callus flattened (dark area in Fig. 3F). Shell smooth, lacking sculpture. Fine growth lines, subtle spiral cords present under sulphide layer. Maximum shell diameter 44.2 mm.</p> <p> <i>Operculum:</i> Operculum (Fig. 3E, F) corneous, thin, flaky near the fringe, multispiral, covered by thick sulphide layer except outermost whorl, same material as those covering shell. Juvenile operculum lacking sulphide layer. Moderately thick, opaque, with concave shape (Fig. 5B).</p> <p> <i>Radula:</i> Radula (Fig. 6B) rhipidoglossate. Ribbon in adults approximately 0.5 mm wide and 4 mm long. Formula ∼50 + 4 + 1 + 4 + ∼50. Central, lateral teeth (Fig. 6D) with sharp cusps. Central tooth rectangular. Lateral teeth bear a protrusion near the base. Marginal teeth (Fig. 6F) elongate with truncate distal ending, dividing into ∼20 denticles.</p> <p> <i>Soft parts (Fig. 7B):</i> Foot muscular, large. Fully retractable. Pale white when alive. Small epipodial tentacles present, surrounding posterior two-thirds of operculum. Cephalic tentacles thick, broad at base, tapering distally. Snout tapering and thick. Oesophageal gland huge (see Fig. 7B). Intestines forming a simple loop. Ctenidium bipectinate. Sexes separate. Gonads rather displaced towards the head-foot. Shell muscle large, horse-shoe shaped.</p> <p> <i>Distribution:</i> Only known from Longqi vent field, SWIR (approximately 37°47.03′S, 49°38.96′E), around 2700 m depth. Found mostly on areas of diffuse flow but also on chimneys of active black smokers.</p> <p> <i>Remarks</i></p> <p> Similar to <i>Gigantopelta chessoia</i> sp. nov.; see Comparative remarks above for comparison. The sulphide covering of the shell and that forming the thick coating on the operculum is remarkable. The coating only covers the outer side, and can be removed from the operculum intact by inserting a blade in between. The adult shells are completely covered with sulphide. Sulphide deposition appears to start very early in development, and from the protoconch; as in young specimens (∼ 5 mm maximum diameter) sulphide is only present as a tablet on the apex and not covering the whole shell. The shell parameters are given in Table 2. The relationships between the six parameters measured were investigated, and they were linear across all life stages. Figure 8B shows a scatter plot of shell diameter against shell height.</p>Published as part of <i>Chen, Chong, Linse, Katrin, Roterman, Christopher N., Copley, Jonathan T. & Rogers, Alex D., 2015, A new genus of large hydrothermal vent-endemic gastropod (Neomphalina: Peltospiridae), pp. 319-335 in Zoological Journal of the Linnean Society (Zool. J. Linn. Soc.) (Zool. J. Linn. Soc.) 175 (2)</i> on pages 327-329, DOI: 10.1111/zoj.12279, <a href="http://zenodo.org/record/5338416">http://zenodo.org/record/5338416</a>
Figure 10. Haplotype parsimonious networks constructed from cytochrome c oxidase subunit I in A new genus of large hydrothermal vent-endemic gastropod (Neomphalina: Peltospiridae)
No full textFigure 10. Haplotype parsimonious networks constructed from cytochrome c oxidase subunit I sequences of 30 specimens of: A, Gigantopelta chessoia sp. nov.; B, Gigantopelta aegis sp. nov. Open circles are represented haplotypes, number inside the circles and sizes of the circles correspond to number of individuals sharing the haplotype. Filled circles are hypothesized intermediate haplotypes that are not represented by sequences.Published as part of Chen, Chong, Linse, Katrin, Roterman, Christopher N., Copley, Jonathan T. & Rogers, Alex D., 2015, A new genus of large hydrothermal vent-endemic gastropod (Neomphalina: Peltospiridae), pp. 319-335 in Zoological Journal of the Linnean Society (Zool. J. Linn. Soc.) 175 (2) on page 331, DOI: 10.1111/zoj.12279, http://zenodo.org/record/533841
Matt Christopher Papers - Accession 1309
No full textThe collection includes letters written by the children’s book author, Matt Christopher, to his son, Marty Christopher. Many of the letters also contain newspaper articles of interest to Matt Christopher, which deal with local sports teams, his writing career, his participation in an exhibition baseball game against the New York Giants in 1938, and other of general interest. Most of the letters are personal in nature, however, a majority of the letters delve into Matt Christopher’s writing career, personal interests, the author’s health, as well as his family life.https://digitalcommons.winthrop.edu/manuscriptcollection_findingaids/2649/thumbnail.jp
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