1,721,010 research outputs found
Ostracods. In: VAI, G.B. & CANTELLI, L. (Eds.), (2004) – Litho-palaeoenvironmental maps of Italy during the last two climatic extremes: Map. 1 – Last Glacial Maximum; Map. 2 – Holocene climatic optimum, 1:1.000.000 scale. 32nd I.G.C. Florence, Bologna
No full textThe ostracod fauna of the Plio-Pleistocene Monte Mario succession (Roma, Italy)
No full textThe marine ostracods collected during a recent re-sampling of the “classical” Plio-Pleistocene Monte Mario succession
(Roma, Latium) are here listed and, in some cases, some species have been taxonomically reviewed. Ostracod faunas come from the late
Zanclean Monte Vaticano Fm. and from the early Calabrian (Santernian p.p.) Monte Mario Fm.
For each species an updated stratigraphical distribution is reported. Five new species have been arisen: Callistocythere dubia nov. sp.,
Ionicythere planocostata nov. sp., Aurila (Aurila) diversofoveolata nov. sp., Eucytherura vaticana nov. sp. and Semicytherura marialuisae nov.
sp. Except for Callistocythere dubia nov. sp., collected also in the Gelasian of Kos (Greece), Calabrian (Emilian) of Vrica (Calabria) and in
the recent sediments of Golfo di Saline (NE Sardinia) and for Semicytherura marialuisae nov. sp., collected in the Calabrian (Santernian-
Emilian) of Vrica (Calabria), the other new species are exclusive of the Monte Mario succession. Four new “northern guest” ostracods for the
early Calabrian (Santernian) of the Mediterranean area (Bythocythere zetlandica, Cytheropteron (Cytheropteron) depressum, Paradoxostoma
ensiforme and Paradoxostoma abbreviatum) have been collected in the Monte Mario Fm., in the same levels where literature reports the
presence of the “northern guest” molluscs Arctica islandica, Cochlodesma praetenue and Buccinum humphreysianum, confirming the cold
climatic oscillation during which the Sabbie grigie ad Arctica islandica deposited. Moreover, the already known “warm” Calabrian (Santernian)
guest Mediocytherideis (Sylvestra) virgula has been collected in the upper portion of the Monte Mario succession. These findings, together
with the temporal constrain of the Monte Mario Fm. to the early Calabrian (Santernian p.p., owing to the absence of Calcidyscus macintyrei
and large Gephyrocapsa), allowed to tentatively refer the deposition of the Monte Mario Fm. between the cold OIS 58 and the warm OIS 55
A revision of the “northern guest” Ostracoda (Crustacea) occurrence in the Quaternary of the Mediterranean area
No full textIn this paper the revision of the “northern guest” ostracods widespread in the Mediterranean area during Quaternary time is proposed. The abundant literature on this topic lists up to twenty-three species. They have been critically revised and a list of only twelve true “northern guests” is provided: Acanthocythereis dunelmensis (NORMAN, 1865), Bythocythere turgida SARS, 1866, Bythocythere zetlandica ATHERSUCH, HORNE & WHITTAKER, 1983, Cythere lutea MÜLLER 1785, Cytheropteron depressum (BRADY & NORMAN, 1889), Cytheropteron punctatum BRADY, 1868, Cytheropteron testudo SARS, 1870, Hemicythere villosa (SARS, 1865), Paradoxostoma abbreviatum SARS, 1866, Paradoxostoma ensiforme BRADY, 1866, Paradoxostoma tenuissimum (NORMAN, 1869) and Semicytherura angulata (BRADY, 1868). These species are generally rare, being found with very few specimens and mainly in one locality. Only Cytheropteron testudo and Cytheropteron punctatum have been reported with a wide geographical distribution in Italy and in the Aegean Sea. The twelve “northern guest” ostracods entered the Mediterranean at different times, being more abundant in the Early Pleistocene Sicilian substage. Only one study on the Last Glacial Maximum marine ostracods has been carried out recording the presence of C. testudo. The record of loose valves of “cold” ostracod species (C. testudo, P. tenuissimum and B. turgida) among the living Mediterranean assemblages suggests that they could have migrated into the Mediterranean even during Late Pleistocene time. In this paper, a critical revision of the existing literature about “northern guest” ostracods is presented, together with their stratigraphical and geographical distribution in the Mediterranean, and three new “northern guest” ostracod species are added
Late Miocene brackish Loxoconchidae (Crustacea, Ostracoda) from Italy
No full textThe LateMiocene Italian brackish Loxoconchidae are herein discussed and illustrated. Three genera and two subgenera have been recognized in
the brackish Italian basins: Loxoconcha, Loxocorniculina, Loxoconchissa (Loxoconchissa) and Loxoconchissa (Loxocaspia). Taking
into account the diagnostic characters of several Loxoconchidae genera, in this paper Loxocorniculina is raised at a generic rank, Loxocaspia is
confirmed as a subgenus within genus Loxoconchissa and several new species are established: Loxoconchissa (Loxoconchissa) kinoi
nov. sp., Loxoconchissa (Loxocaspia) cosentinoi nov. sp., Loxoconchissa (Loxocaspia) nuda nov. sp., Loxoconchissa (Loxocaspia) punctata nov.
sp., Loxoconchissa (Loxocaspia) reticulata nov. sp., Loxoconchissa (Loxocaspia) tuberosa nov. sp. and Loxoconchissa (Loxocaspia) velonae nov. sp.
Loxocorniculina is a typical Paratethyan genus which widespread into the Palaeo-Mediterranean during the late Messinian Lago-Mare event.
Loxoconchissa was known to bewidespread only in the Paratethyan realm and in this paper it is signalled for the first time in the Late Tortonian-early
Messinian of Italy. The palaeobiogeography of these genera is discussed and the observed continuous distribution of Loxocorniculina against the
disjunct distribution of Loxoconchissa leads to suggest that this latter genus underwent a passive dispersal via aquatic birds
Late Miocene brackish Loxoconchidae (Crustacea, Ostracoda) from Italy.
No full textThe Family Loxoconchidae Sars 1925 includes over 800 fossil and extant species that mainly inhabit littoral and sublittoral marine environments. Only few living species (i.e. Loxoconcha elliptica Brady, Elofsonia baltica (Hirschmann), Hirschmannia viridis (Müller), Sagmatocythere pennata (Schornikov), Loxoconchissa (Loxocaspia) immodulata Schornikov) can withstand brackish waters.During Late Miocene, in the Paratethyan domain wide brackish basins developed and numerous Loxoconchidae adapted to the decreased salinity. Beside several species pertaining to the genus Loxoconcha, other species have been referred to the genera Loxocorniculina, Loxoconchissa s.s. and Loxoconchissa (Loxocaspia). In the Italian brackish basins developed during Late Miocene it is possible to recognise the presence of all these genera: Loxoconcha and Loxocorniculina are mainly documented in the latest Messinian lago-mare biofacies [i.e. Loxoconcha eichwaldi Livental, Loxoconcha muelleri (Mehés), Loxoconcha rhombovalis Pokorny and Loxocorniculina djafarovi (Sneider in Suzin)]; on the contrary Loxoconchissa s.s. and Loxoconchissa (Loxocaspia) seem to be confined to the Late Tortonian-early Messinian brackish basins of Tuscany (Volterra-Radicondoli, Cinigiano-Baccinello and Velona Basins) and are represented by new species.A re-definition of the genus Loxoconchissa s. l. on the base of the hinge and of the sexual dimorphisms is presented in this paper and its geographic and stratigraphic distribution are discussed
Paratethyan faunas in the Tortonian succession of the CARG-FVG S6 “Col Vergnal” drilling (Friuli, NE Italy)
No full textPalaeoenvironmental evolution of the Plio-Pleistocene Monte Mario succession (Rome, Italy) inferred from ostracod assemblages
No full textThe whole “classical” Monte Mario succession has been recovered through the excavation of the Giovanni XXIII tunnel inside the city of Rome (Italy). The succession has been sampled from the Zanclean Monte Vaticano Fm. to the Lower Pleistocene Monte Mario Fm. Well-preserved and diversified ostracod faunas have been recovered and the ostracod assemblages have been studied using community structure analyses and statistical multivariate analyses. The Monte Vaticano Fm. has been referred to a bathyal marine environment (300-350 m of depth), the most represented genera being Krithe, Parakrithe, Bairdoppilata and Cytherella. The Monte Mario Fm. provided ostracod assemblages referable to littoral environments with Cimbaurila, Aurila, Costa, Carinocythereis, Leptocythere and Loxoconcha as dominant taxa. Within the Monte Mario Fm., three marine shallowing-up sequences have been recognised, the last two recording marginal marine conditions with shallow depths and variable salinity (dominant Cyprideis torosa). Two cold-water episodes have been recognised within the basal Monte Mario Fm. characterised by the occurrence of Arctica islandica and, within the upper level, by the presence of the northern guests Cytheropteron depressum, Bythocythere zetlandica, Paradoxostoma ensiforme and Paradoxostoma abbreviatum
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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