34,592 research outputs found
Habeastrum Simone 2019, new genus
No full textHabeastrum new genus Urn:lsid:zoobank.org:act: 9D0B66F5-869E-4842-B50B-6A688059FBB7 Diagnosis. Shell minute in size (up to 2 mm), outline relatively narrowly conical, with each whorl slightly larger than preceding one. Walls fragile, thin. Protoconch smooth, except for minute radial wrinkles, translucent, wide and flattened, of 2.5 successively larger whorls, ~ 0.4 mm; transition to teleoconch unclear, marked by gradual appearance of sculpture. Outer sculpture mostly small, rather prosocline axial cords, each one narrow, from suture to suture, separated from each other by distance 4 to 5 times wider than each cord. Aperture non-deflected, simple, even with last whorl. Umbilicus open, deep. Type species. Habeastrum parafusum n. sp. List of included taxa. H. parafusum n. sp.; H. omphalium n. sp. Etymology. The generic name is derived from the genus Habeas Simone, 2013, plus the diminutive Latin suffix - trum; meaning a tiny version of Habeas. Gender. Neutral. Taxonomic discussion. See Discussion below.Published as part of Simone, Luiz Ricardo L., 2019, The new genus Habeastrum, with two new species (Gastropoda, Diplommatinidae) in Mato Grosso do Sul caves, Brazil, pp. 287-290 in Zootaxa 4543 (2) on page 287, DOI: 10.11646/zootaxa.4543.2.7, http://zenodo.org/record/261783
Edmund Mach Foundation’s Genomics Platform
No full textThe Edmund Mach Foundation’s Genomics Platform takes part in the research activities using innovative methods of experimental investigation relating to sequencing and genotyping. The Platform provides comprehensive genomic services that include genome sequencing, transcriptome analysis, gene expression, genome-wide SNP genotyping, molecular assisted breeding and de-novo DNA marker discovery. Our application fields ranges from agriculture to environmental studies, through the metagenomic studies of the microbial communities in their environment (human and animal gut, plants, environmental, food).
The availability of three robotic workstations can automate a wide range of applications including primary and secondary screening, DNA extraction, amplification set-up, sample dilution, normalization and assay development. Thanks to the 96-capillary 3730xl DNA analyzer and the 16-capillary 3130xl DNA analyzer a wide variety of sequencing and fragment analysis applications including re-sequencing, microsatellite analysis, AFLP, LOH, SSCP, SNP screening and SNP validation are available to allowing researchers to save time, reduce costs and increase productivity. The 454 and Illumina sequencing platforms combined with the Illumina HiScanSQ system integrates the power and resolution of Next Generation Sequencing with the high-throughput capacity of genotyping and gene expression arrays, delivering unprecedented flexibility for experimental design.
The Genomics Platform explores new investigative methods, with the acquisition of new knowledge in the green biotechnology field to make them widely available
Genome sequencing provides new insights on the distribution of Erwinia amylovora lineages in northern Italy
No full textErwinia amylovora is a Gram‐negative bacterium that colonizes a wide variety of plant species causing recurrent local outbreaks of fire blight in crops of the Rosaceae family. Recent genomic surveys have documented the limited genomic diversity of this species, possibly related to a recent evolutionary bottleneck and a strong correlation between geography and phylogenetic structure of the species. Despite its economic importance, little is known about the genetic variability of co‐circulating strains during local outbreaks. Here, we report the genome sequences of 82 isolates of E. amylovora, collected from different host plants in a period of 16 years in Trentino, a small region in the Northeastern Italian Alps that has been characterized by recurrent outbreaks of fire blight in apple orchards. While the genome isolated before 2018 are closely related to other strains already present in Europe, we found a novel subclade composed only by isolates that were sampled starting from 2018 and demonstrate that the endemic population of this pathogen can be composed by mixture of strains
Unraveling the genetic origin of 'Glera', 'Ribolla Gialla' and other autochthonous grapevine varieties from Friuli Venezia Giulia (northeastern Italy)
No full text'Glera' and 'Ribolla Gialla' are the most economically relevant local grapevine cultivars of Friuli Venezia Giulia region (north-eastern Italy). 'Glera' is used to produce the world-renowned Prosecco wine. 'Ribolla Gialla' cultivation is constantly increasing due to the strong demand for sparkling wine and is the most important variety in Brda (Slovenia). Knowledge of local varieties history in terms of migration and pedigree relationships has scientific and marketing appeal. Following prospections, genotyping and ampelographic characterization of minor germplasm in Friuli Venezia Giulia, a further research was developed to understand the parentage relationships among the grapevine varieties grown in this region. An integrated strategy was followed combining the analysis of nuclear and chloroplast microsatellites with the Vitis 18k SNP chip. Two main recurrent parents were found, which can be regarded as "founders": 'Vulpea', an Austrian variety parent-offspring related with at least ten Friuli Venezia Giulia cultivars, among them 'Glera', and 'Refosco Nostrano', first degree related with other six Friuli Venezia Giulia varieties. 'Ribolla Gialla' was shown to be another member of the impressively long list of offspring derived from the prolific 'Heunisch Weiss'. Combining molecular markers and historical references was a high-performance strategy for retracing and adjusting the history of cultivars
Asymmetric Drop Marangoni Migration of Larger Reynolds Numbers
No full textTwo-dimensional and unsteady problems of drop and bubble Marangoni migration are calculated for cases of larger Reynolds numbers in the microgravity environment. A global treatment method is introduced to solve numerically the complete problem by using the finite differential method, and the thermocapillary force acting on the interface is considered as a body force acting in the computational mesh elements which are passed by the interface. The program of numerical simulation is checked with the symmetric model of bubble migration in Ref. [1]. The asymmetric model of bubble migration is calculated, and the results are different fi om that of the symmetric model. The asymmetric model of drop migration is also calculated. The trajectory of drop in larger Reynolds number fluid is oscillated periodically due to the vortex separation in the wake. (C) 1998 Elsevier Science Ltd. All rights reserved
Crepidula pyguaia Simone 2006, new species
No full textCrepidula pyguaia new species (Figs. 7–9, 34, 97–106) Crepidula protea: Rios 1994: 71 (part). Types: Holotype: MZSP 35831 ♀. Paratypes: BRAZIL; Santa Cataria; Bombinhas, 0–1 m depth, MZSP 35832, 2♀ (Tarasconi col., 22/vii/1993), Trapiche and Embrulho beaches, MZSP 34640, 2♀, 2 shells, 9 young (Simone col. 20/ii/2002); Camburiu, Central beach, MZSP 34603, 2 shells (Simone col. 21/ii/2002); Itapema, Canto da Praia, MZSP 35842, 2♀, 1 shell (Tarasconi col., 28/xii/1999). Type locality: BRAZIL; Santa Catarina; Bombinhas, Enseada de Zimbros 27º06S 48º 30W (otter trawl, 2–5 m depth, xii/1993, Tarasconi leg.). Diagnosis: Shell occurring intertidal in Santa Catarina coast. Shell whitish, with periostracum persistent covering most of shell. Siphonal pallial fold broad and wide. Pericardium constricted in middle portion, being narrow in its posterior half. Osphradium occupying about 5% of pallial aperture, bearing about 10 filaments close from each other. Pallial oviduct having 7 seminal receptacles connected to albumen gland almost in same region. Female genital papilla lacking folds, broad, irregular, inflated. Description: Shell (Figs. 7–9): Of medium size (up to 20 mm), white, convex, flat, surface opaque. Protoconch not seen (eroded). Periostracum heavy, rich in hair, color pale brown, lost in older regions but generally covering most of shell. Sculpture lacking, except concentric undulations and growth lines. Septum somewhat short, wide, triangular, curved septum lateral insertions slightly far from shell outer edges, mainly at right. Septum anterior edge with a wide central notch, its right edge almost straight, its left edge curved, convex; another narrower notch in left end weakly deeper. Inner surface glossy, white, smooth. Headfoot (Figs. 97, 103): General characters similar to those of C. margarita, differences and notable features following. Tentacles tip weakly bifid. Eyes dark, very small, located on very short ommatophores in level between basal and middle thirds of tentacles lateral margin. Head and neck little shorter than foot length. Columellar muscle very reduced, contours anterior border of shell septum, more concentrated at right (Fig. 97). Anterior edge of foot, with pedal gland furrow, simple. Mantle organs (Figs. 98–101): Characters similar to those of C. plana, remarks following. Mantle border special arrangement of folds (in middle region of pallial cavity aperture) very broad, covering anterior end of gill, and exceeding beyond mantle border (Figs. 99, 100); decreasing gradually towards left, disappearing in middle level of osphradium. This fold possesses a broad and shallow central furrow. Dorsal shell muscle well developed (Fig. 98: dm), relatively large. Lateral shell muscle reduced, almost absent. Pallial cavity aperture occupies almost half of anterior half of shell border turned to right (if shell compared with a clock, in dorsal view and with head occupying 12 oclock, pallial aperture begins in 9:30 and finishes in 3 oclock) (Figs. 98, 99). Pallial cavity length about same of total length of animal (Figs. 98). Osphradium small, length about 1/6 of pallial aperture length. Osphradium leaflets tall, tip rounded, close from each other, somewhat thick, varying around 11 in number (Fig. 100). Gill filaments triangular base short, extending by about 1/5 of filament length (Figs. 100, 101). Endostyle (Figs. 99, 100: en) simple. Hypobranchial gland thin, white, more developed in left side of intestine. Visceral mass (Figs. 98, 99): Shorter and broader than that of C. margarita. Circulatory and excretory systems (Fig. 102): Characters very similar to those of C. atrasolea, remarks following. Pericardium right region broader, with auricle curved, possessing a blunt angle in its middle anterior region. Kidney posteriorright region with 2–3 broad, tall, longitudinal folds in dorsal surface; these folds running towards anterior covering left surface of rectum, bearing longitudinal folds; in anteriorleft region renal issue covering only dorsal surface, having oblique folds, some penetrating in adrectal sinus. Adrectal sinus continuous to kidney, surrounding rectum up to short distance of anus, gradually decreasing. Digestive system (Figs. 103–105):. Buccal mass extending little posterior to proboscis. Odontophore muscles (Fig. 104): m7 pair with insertion inside radular sac, connected with each other by about half of their length; m11 pair present. Radula extending little beyond odontophore length. Radula (Fig. 34): rachidian tooth tall, narrow, central cusp large and sharp, single secondary cusps, no basal cusps but pair of lateral reinforcements on its borders; lateral tooth broad, curved internally, with about eight triangular cusps, medial cusp larger, apical, turned towards median, cusps somewhat similar sized, disappearing about in middle region of tooth, remaining a slight thick border; both marginal teeth long, curved, tall, sharp pointed tip, about seven cusps in their innerapical margin; inner marginal tooth with about double width than outer marginal tooth. Salivary glands narrow, (Fig. 103), length longer than of haemocoel length, running almost straight along haemocoel, becoming broader in region posterior to nerve ring. Stomach (Fig. 105) similar to that of C. atrasolea, except for 1) insertion of esophagus somewhat close to posterior end of stomach; 2) posterior duct to digestive gland very much narrow, simple, running towards posterior; 3) anterior duct to digestive gland broad, dichotomic only after some distance. Stomach inner surface with a single, narrow, pair of folds running along ventral surface of style sac; these folds running in opposite side from each other in region just anterior to anterior duct to digestive gland, surrounding origin of style sac, fading in dorsal surface. Digestive gland pale beige in color. Intestine similar in attributes than that of C. atrasolea, except for strongest Ushaped loop of rectum exposed in pallial cavity (Figs. 100, 105). Genital system: Development: All examined specimens females and larger than 15 mm. No males available. Female (Fig. 106): Albumen gland narrower, differing little from visceral oviduct. About 7 seminal receptacles inserted in right side of albumen gland, reunited in a short region. Seminal receptacles duct slender and long. Capsule gland narrower, somewhat triangular, inner duct broad, flat, straight; walls slightly thin. Vaginal tube originating from anteriorleft region of capsule gland; running obliquely to capsule gland towards right, narrow; length little shorter of that of capsule gland; vaginal tube inner surface with 7–8 longitudinal, very narrow folds. Genital papilla tall, situated at sort distance of anterior region of albumen gland, at long distance from anus; its inner surface continuous with vaginal tube folds. Papilla broad, blunt, anterior half semispherical, posterior surface with irregular folds Genital pore a transversal, terminal slit with edges tall and thick. Central nervous system: With normal characters as remainder known Crepidula (Simone 2002), located posterior, far removed from buccal mass, close to visceral mass. Habitat: Intertidal rocks. Distribution: Brazilian coast of Santa Catarina. Measurements of shells (in mm): MZSP 35831: 16.3 by 14.0; MZSP 35832, ♀ 2: 16.0 by 13.4; ♀ 3: 19.4 by 14.0. Etymology: The specific epithet came from the Tupy language, pyguaia, meaning concave, and allusion to the possible extreme form of some specimens. Material examined: Types. Discussion: Crepidula pyguaia is similar to the other congeneric species from Western Atlantic. Differs mainly in flat, concave shell, somewhat rounded outline, and by heavy periostracum preserved in youngest region. The characteristic uniform white color is also distinctive, since the remaining species are usually brownish. The anatomical characters also corroborate with the specific separation, mostly explored above. The most important are the longer osphradium, with filaments closer to each other; the shorter triangular base of the gill filaments; the curved fashion of the auricle; the longer salivary glands; the different conformation of gastric ducts to digestive gland (simpler and narrower); and the strongest curve of the Ushaped portion of rectum. However, the deeper differences are in the characters of the pallial oviduct, such as the narrow albumen gland situated almost perpendicularly to the capsule gland; the seminal receptacles in a larger number, reunited forming a single mass, and the genital papilla blunt, almost spherical. C. pyguaia has been identified as C. protea, a species redescribed in Simone (2002) occurring in deeper waters (generally on other shells), with taller and more convex shell, lacking periostracum, and more colorful.Published as part of Simone, Luiz Ricardo L., 2006, Morphological and phylogenetic study of the Western Atlantic Crepidula plana complex (Caenogastropoda, Calyptraeidae), with description of three new species from Brazil, pp. 1-64 in Zootaxa 1112 (1) on pages 23-26, DOI: 10.11646/zootaxa.1112.1.1, http://zenodo.org/record/505771
Bibliographie critique
No full textPinto Roger, Ferrier Jean-Pierre, Deniniolle Sylvie, van der Essen Alfred, Dreyfus Simone, Larger Dominique, Flory Thiébaut, Feuer Guy, Goy Raymond, Pellet Alain, Labouz Marie-Françoise. Bibliographie critique. In: Annuaire français de droit international, volume 29, 1983. pp. 959-1059
Bibliographie critique
No full textPinto Roger, Ferrier Jean-Pierre, Deniniolle Sylvie, van der Essen Alfred, Dreyfus Simone, Larger Dominique, Flory Thiébaut, Feuer Guy, Goy Raymond, Pellet Alain, Labouz Marie-Françoise. Bibliographie critique. In: Annuaire français de droit international, volume 29, 1983. pp. 959-1059
Mitromorpha sama Simone & Cunha 2012, n. sp.
No full textMitromorpha sama n. sp. (Fig. 9 A-F) TYPE MATERIAL. — Holotype: Brazil, Espírito Santo, off Itaúnas, continental slope of Abrolhos, 19°00, 37°48’W, 607-620 m depth, MNHN 25224 (Fig. 9A, B) (MD 55, stn DC 73, Bouchet, Leal & Métivier coll., 27. V.1987). Paratypes: same data as holotype, MNHN 25225, 6 shells, MZSP 102973, 2 shells (Fig. 9 C-F). — Off Regência, 19°40’S, 37°48’W, 790-940 m depth, MNHN 25226, 1 shell (stn CB 77). TYPE LOCALITY. — Brazil, Espírito Santo, off Itaúnas, continental slope of Abrolhos, 19°00, 37°48’W, 607-620 m depth (MD 55, stn DC 73). DISTRIBUTION. — Off Espírito Santo, Abrolhos continental slope. ETYMOLOGY. — The specific epithet is derived from the Tupi-Guarani word “sama”, meaning cord, line; an allusion to the aligned fashion of the axial sculpture. DIAGNOSIS. — Shell length c. 7 mm, biconic; protoconch paucispiral; sculpture delicate reticulate, with axial cords somewhat aligned along whorls.Aperture elongated; outer lip lyrate within, preceded by slope and axial thread; inner lip with pair of columellar folds. DESCRIPTION Shell: length up to 6.6 mm, outline biconic (Fig. 9 A-D); width c. ½ length. Colour uniform pale beige. Protoconch whitish, of 1.5 whorls, mammillate (Fig. 9E); comprising c. 5% of length and c. 18% of shell width; surface smooth, glossy; transition with teleoconch clear, orthocline. Spire conic, comprising c. ½ of shell length; spire angle c. 55°. Teleoconch of about five whorls, profile straight, suture plane. Sculptured by series of pustules, aligned both axially and spirally, forming uniform reticulation; c. 20 axial and four spiral lines of pustules in penultimate whorl (Fig. 9B, D); c. 20 spiral lines in initial region of body whorl (Fig. 9A, C); axial lines somewhat continuous with neighbour whorls; subsutural line slightly larger in c. ½ of specimens. Differentiable slope, preceded by axial, low thread, located c. ∕₅ whorl preceding outer lip (Fig. 9D); outer lip thicker on thread, becoming thinner towards edge, with outer surface weakly sculptured. Aperture elliptic, c. ½ of shell length and c. ¼ shell width (Fig. 9A, D); c. 3 times longer than wide; weakly oblique related to longitudinal shell axis. Outer lip internally lyrate, with 4-5 spiral inner, weak cords, being upper cord larger, becoming gradually narrower in peri-siphonal region (Fig. 9C). Inner lip slightly concave, possessing pair of low, middle folds, being uppermost fold slightly larger than inferior fold (Fig. 9F). Siphonal canal short, slightly rostrate, projected forwards and dorsally (Fig. 9D). No broad callus or umbilicus. MEASUREMENTS (inmm). — Holotype: 6.6 × 3.2; paratype MZSP 102973 (1): 5.6 × 2.6. HABITAT. — Sandy-mud bottoms, 607-940 m depth.Published as part of Simone, Luiz Ricardo L. & Cunha, Carlo M., 2012, Taxonomic study on the molluscs collected in Marion-Dufresne expedition (MD 55) to SE Brazil: Xenophoridae, Cypraeoidea, mitriforms and Terebridae (Caenogastropoda), pp. 745-781 in Zoosystema 34 (4) on pages 770-771, DOI: 10.5252/z2012n4a6, http://zenodo.org/record/516665
A distributed disagreement-based protocol for synchronization of uncertain heterogeneous agents
No full textIn networks with heterogeneous and uncertain agents, fixed-gain control can lead to synchronization only if the uncertainties are relatively small. If the uncertainties are larger, we need to develop adaptive-gain approaches to achieve synchronization. In this work we propose an adaptive synchronization protocol, in case of full-state measurement, for uncertain heterogeneous agents based on a distributed disagreement reasoning. Specifically, we first define unknown gains (feedback and coupling gains) that could lead all agents to a homogeneous behavior and thus synchronization: however, since these gains are unknown in view of the unknown dynamics, we design adaptive laws for these gains that lead the agents toward synchronization. The adaptive laws are driven by a disagreement error which is calculated among neighbors: a Lyapunov analysis is presented for showing convergence of the synchronization error to zero.Accepted Author ManuscriptTeam Bart De Schutte
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