1,747,201 research outputs found
Le attività in Africa di Mario Pavan e dell’Istituto di Entomologia dell’Università di Pavia.
No full textEntomologo e studioso di fama internazionale, Mario Pavan ha dedicato la sua carriera
professionale allo studio e alla conservazione dell’ambiente naturale. Tra gli anni Cinquanta e gli anni
Novanta del Novecento ha guidato spedizioni in numerosi Paesi Africani anche per incarico del Governo
Italiano e di organizzazioni internazionali al fine di studiare i rapporti tra le popolazioni indigene
e il loro ambiente, sviluppare politiche di conservazione dell’ambiente, studiare l’entomofoauna, e
sviluppare rapporti di collaborazione scientifica fra l’Università degli Studi di Pavia e le istituzioni
locali. Fra i campioni entomologici raccolti nei suoi viaggi, ora depositati nelle collezioni del Museo di
Storia Naturale dell’Università degli Studi di Pavia, sono stati riconosciuti numerosi nuovi taxa, alcuni
dei quali a lui dedicati
Acustica dell'ambiente; Apprendimento canoro; Apprendimento prenatale; Bioacustica; Canto; Canto antifonale; Canto territoriale; Cantori misti; Comunicazione acustica; Cori (Canto di gruppo); Dialetto; Duetto canoro; Ecolocalizzazione; Imitazione vocale; Imprinting canoro; Infrasuoni; Modello genetico; Richiamo; Riconoscimento individuale; Segnali vibratori; Sottocanto; Spettrogramma; Suono, Analisi del; Suono, Registrazione; Ultrasuoni; Vocalizzazione
No full textDizionario dei termini relativi all'etologia, in questo ambito Pavan G. tratta dei lemmi relativi alla bioacustica e all'uso del suono negli animali
2014 44th European Solid State Device Research Conference (ESSDERC)
No full textOn behalf of the Organizing Committees of ESSDERC 2014, it is our pleasure to welcome you to the 44th European Solid-State Device Research Conference. ESSDERC 2014 runs in parallel to its sister conference ESSCIRC 2014, covering all aspects of modern solid-state systems, circuits and devices at a single event. The increasing level of integration for system-on-chip design made available by advances in the integration technology is stimulating more than ever before the need for deeper interaction among technologists, device experts, circuit designers and system architects. As a participant at ESSDERC and ESSCIRC, you will have the opportunity to learn of the latest advances in these fields, and to meet those who have dared, pioneered and succeeded
Gino Pavan e Ravenna archeologica
No full textLa figura di Gino Pavan occupa un posto significativo non solo nella storia del restauro dei monumenti ravennati, ma anche nella storia della ricerca archeologica.
A Ravenna la sua attenzione si estende a largo spettro sia agli edifici curati e restaurati, ma anche agli edifici sottoposti a speciali indagini di carattere precipuamente archeologico negli anni della sua soprintendenza (1972-1976). Spicca il suo impegno investigativo nei riguardi della chiesa di Santa Croce.
Nel guidare una vasta campagna di scavi archeologici a Santa Croce si dimostra capace di estendere i suoi interessi verso la comprensione dei caratteri fondamentali della complessa storia urbana. E’ passato al setaccio l’intero quartiere – già insistentemente ritenuto il quartiere degli imperatori (“regio domus Augustae”) - con un’articolazione cronologica che include pienamente l’età romana e non solo i classici monumenti tardoantichi della città.
Erano anni nei quali le tre grandi specializzazioni degli operatori nel campo dei beni culturali (Stora dell’Arte, Archeologia e Architettura) mantenevano addentellati e aderenze, poi sempre più affievoliti col passare degli anni.
Quando avvicina il mausoleo di Teodorico non si dimostra solo incisivo fautore della sua conservazione, ma anche curioso indagatore della storia della documentazione e dell’approccio antiquario al monumento oltre che attento cultore della storia degli studi.
Si mosse con agilità dal particolare al generale come quando si dedicò ad una visione d’insieme del periodo giustinianeo a Ravenna. In questo lavoro è ben evidente non solo la lucida visione dei problemi, ma anche la forte capacità di affermare la necessità di conoscere analiticamente lo stato degli studi in una singolare condivisione di intenti con il contemporaneo Giuseppe Bovini, che senza dedicarsi personalmente alla ricerca archeologica dimostrava l’imprescindibile necessità di una precisa comprensione di ogni passo del pensiero critico per l’avvio di qualunque ricerca
Transparency of Information and Coordination in Economies with Investment Complementarities
No full text
Monodelphis (Pyrodelphys) Pavan & Voss 2016, new subgenus
No full textPyrodelphys, new subgenus TYPE SPECIES: Monodelphis emiliae (Thomas, 1912). CONTENTS: emiliae Thomas, 1912. DIAGNOSIS: Dorsal body pelage with grayish midbody contrasting with reddish head and rump (fig. 14A); ventral pelage uniformly colored (without self-whitish median markings), yellowish or orangish on museum skins, but much brighter in life (fig. 14B). Mammae 2–1–2 = 5 (MZUSP 35064), 3–1–3 = 7 (MPEG JUR 79), or 4–1–4 = 9 (MPEG 39106, 39182, 42955), all abdominal-inguinal. Thenar and first interdigital pad of pes usually fused or in contact; hypothenar pad of pes usually present. 8 Body pelage extends onto tail farther dorsally than ventrally, or to about the same extent dorsally and ventrally; tail scales arranged in annular series. Infraorbital foramen dorsal to M1; frontal process of jugal present but rounded, not distinctly angular; parietal usually (ca. 80% of examined specimens) in contact with mastoid; incisive foramina usually short; maxillopalatine fenestrae short; sphenorbital fissure large, exposing basisphenoid in lateral view; infratemporal crest of alisphenoid distinct; secondary foramen ovale present or absent; tympanic wing of alisphenoid large; tip of anterior process of malleus not exposed on external bullar surface; rostral tympanic process of petrosal broad and rounded, concealing fenestra cochleae in ventral view; stapes columelliform, imperforate or microperforate; subsquamosal foramen small. Anterior cingulids of m2 and m3 broad; entoconids of m1–m3 distinct; dp3 small, with incomplete trigonid and indistinct anterior cingulid. a Differs among member species. b Intraspecific variation. COMPARISONS: Pyrodelphys is uniquely distinguished from other subgenera of Monodelphis by fusion or contact between the thenar and first interdigital pads of the hind foot (the thenar and first interdigital are separate in members of other subgenera) and by having a small subsquamosal foramen (the subsquamosal foramen is distinctly larger in members of other subgenera. Among other diagnostic comparisons (table 2), Pyrodelphys is additionally distinguished from the subgenus Monodelphis by having a reddish head and rump separated by a grayish midbody, an infraorbital foramen dorsal to M1, large alisphenoid tympanic wing, unexposed tip of the anterior process of the malleus, broadly rounded rostral tympanic process of the petrosal, columelliform stapes, and smaller dp3. Pyrodelphys is additionally distinguished from Microdelphys by lacking dorsal stripes in all age-sex classes, by lacking a distinctly angular frontal process of the jugal, and by having a distinct infratemporal crest of the alisphenoid. Pyrodelphys is also distinguished from Monodelphiops by its dorsal pelage pattern, by lacking pectoral mammae, and by having tail scales in annular series, a large alisphenoid tympanic wing, and a broadly rounded rostral tympanic process of the petrosal. Diagnostic comparisons between Pyrodelphys and Mygalodelphys have already been provided (see above). ETYMOLOGY: From pyr, ancient Greek for “fire,” in reference to the flame-colored underparts of living and freshly dead specimens of this clade (fig. 14B). REMARKS: This taxon is widely divergent from other clades in the genus Monodelphis and appears to represent an ancient lineage with no close extant relatives (Pavan et al., 2014; Pavan et al., 2016). NOTES ON DISTRIBUTION AND SYMPATRY: Monodelphis (Pyrodelphys) emiliae is known from southwestern and southeastern Amazonia (table 3), where it ranges from near the base of the Andes in Peru and Bolivia to eastern Pará, Brazil. Based on geographic range overlap and published reports of cooccurring species (e.g., in the lower Urubamba region of eastern Peru; Solari et al., 2001), Pyrodelphys may occur sympatrically with species of the subgenera Mygalodelphys and/or Monodelphis throughout its geographic range.Published as part of Pavan, Silvia E. & Voss, Robert S., 2016, A Revised Subgeneric Classification of Short-tailed Opossums (Didelphidae: Monodelphis), pp. 1-44 in American Museum Novitates 2016 (3868) on pages 22-24, DOI: 10.1206/3868.1, http://zenodo.org/record/459843
(Mygalodelphys) Pavan & Voss 2016, new subgenus
No full text<i>Mygalodelphys</i>, new subgenus <p> TYPE SPECIES: <i>Monodelphis adusta</i> (Thomas, 1897).</p> <p> CONTENTS: <i>adusta</i> Thomas, 1897 (including <i>melanops</i> Goldman, 1912); <i>peruviana</i> Osgood, 1913; <i>osgoodi</i> Doutt, 1938; <i>kunsi</i> Pine, 1975; <i>reigi</i> Lew and Pérez-Hernández, 2004; <i>ronaldi</i> Solari, 2004; <i>handleyi</i> Solari, 2007; and <i>pinocchio</i> Pavan, 2015.</p> <p> DIAGNOSIS: Dorsal body pelage unpatterned; ventral pelage uniformly colored or with self-whitish median markings. 5 Mammae 2–0–2 = 4 (e.g., in <i>M. peruviana</i>; AMNH 264562), 3–0–3 = 6 (e.g., in <i>M. adusta</i>; AMNH 202650), or 3–1–3 = 7 (e.g., in <i>M. pinocchio</i>; MZUSP MTR15815), all abdominal-inguinal. Thenar and first interdigital pad of pes separate, not fused; hypothenar pad of pes present (but unknown for <i>M. reigi</i>, <i>M. peruviana</i>, and <i>M. ronaldi</i>). Body pelage extends onto tail farther ventrally than dorsally; tail scales arranged in annular or spiral series. Infraorbital foramen dorsal to M1; frontal process of jugal absent or indistinct; parietal usually (> 90% of examined specimens) not in contact with mastoid; length of incisive foramina variable; length of maxillopalatine fenestra variable; sphenorbital fissure small (basisphenoid laterally concealed); infratemporal crest of alisphenoid distinct or indistinct; secondary foramen ovale usually absent 6; tympanic wing of alisphenoid small; tip of anterior process of malleus exposed on external bullar surface between ectotympanic and alisphenoid; rostral tympanic process of petrosal narrow and triangular, not concealing fenestra cochleae in ventral view; stapes columelliform, imperforate or microperforate; subsquamosal foramen large. Anterior cingulids of m2 and m3 narrow; entoconids of m1–m3 very small, indistinct; dp3 small, with incomplete trigonid and indistinct anterior cingulid in some species (e.g., <i>M. adusta</i>, <i>M. reigi</i>), but dp3 large, with complete trigonid and distinct anterior cingulid in other species (e.g., <i>M. handleyi</i>; the morphology of dp3 is unknown for <i>M. peruviana</i>, <i>M. osgoodi</i>, <i>M. ronaldi</i>, <i>M. pinocchio</i>, and <i>M. kunsi</i>).</p> <p> COMPARISONS: Members of the subgenus <i>Mygalodelphys</i> differ from currently recognized species in other subgenera of <i>Monodelphis</i> by several unique external and craniodental traits, including: (1) soπ body pelage that extends onto the tail farther ventrally than dorsally; (2) frontal process of jugal absent or indistinct; (3) parietal-mastoid contact absent; (4) a small sphenorbital fissure that does not expose the basisphenoid to lateral view; (5) narrow lower molar anterior cingulids; and (6) indistinct entoconids on m1–m3. Self-whitish midventral pelage markings are also unique to <i>Mygalodelphys</i>, although they are oπen polymorphic and are not present in all member species.</p> <p> Among other diagnostic comparisons (table 2), <i>Mygalodelphys</i> additionally differs from <i>Pyrodelphys</i> by its unpatterned dorsal pelage, separate thenar and first interdigital pads on the hind foot, small alisphenoid tympanic wing, exposure of the anterior process of the malleus on the external surface of the bulla, narrow-triangular rostral tympanic process of the petrosal, and a large subsquamosal foramen. <i>Mygalodelphys</i> additionally differs from the usual morphology seen in the nominotypical subgenus by possessing a distinct hypothenar pad on the hindfoot, an infraorbital foramen that is dorsal to M1, and a columelliform stapes. <i>Mygalodelphys</i> additionally differs from <i>Microdelphys</i> by its consistently unpatterned dorsal pelage, small alisphenoid tympanic wing, exposure of the anterior process of the malleus on the external surface of the bulla, and narrow-triangular rostral tympanic process of the petrosal. <i>Mygalodelphys</i> additionally differs from <i>Monodelphiops</i> by its unpatterned dorsal pelage, lack of pectoral mammae, and possession of a hypothenar pad of the hind foot.</p> <p> 5 Self-whitish ventral markings were observed on all examined specimens of <i>M. handleyi</i>, most examined specimens of <i>M. adusta</i> and <i>M. peruviana</i>, and a few specimens of <i>M. kunsi</i>. They were not observed in <i>M. osgoodi</i>, <i>M. pinocchio</i>, <i>M. reigi</i>, or <i>M. ronaldi.</i></p> <p> 6 A few specimens of <i>M. kunsi</i> (<10% of those examined) have a complete bullar lamina forming a secondary foramen ovale on one side of the skull.</p> <p> ETYMOLOGY: From <i>mygale</i>, ancient Greek for “shrew,” which members of this clade strikingly resemble in general aspect.</p> <p> REMARKS: <i>Mygalodelphys</i> corresponds to “clade E” or the “Adusta Group” (Pavan et al., 2014; Pavan et al., 2016), which was recovered with consistently robust support in our previous phylogenetic analyses. Although taxon-dense phylogenetic analyses incorporating morphological characters have yet to be done, it seems likely that several features unique to this subgenus (e.g., body pelage extending onto the tail farther ventrally than dorsally; frontal process of the jugal absent or indistinct; no parietal-mastoid contact; narrow lower molar anterior cingulids) will eventually be found to optimize as subgeneric synapomorphies.</p> <p> Phylogenetic analyses based on mitochondrial and nuclear gene sequences (Pavan et al., 2014; Vilela et al., 2015; Pavan et al., 2016) have consistently recovered a basal dichotomy among the species that we refer to <i>Mygalodelphys</i>: one clade including <i>Monodelphis kunsi</i> and <i>M. pinocchio</i> (<i>M.</i> “species 1” of Pavan et al., 2014; Vilela et al., 2015), and another including <i>M. adusta, M. reigi, M. peruviana, M. osgoodi, M. handleyi,</i> and a still-undescribed form (<i>M.</i> “species 2”). Although these clades are robustly supported by sequence data, morphological data does not support their formal taxonomic recognition. Despite being sister taxa, <i>M. pinocchio</i> and <i>M. kunsi</i> are externally and cranially dissimilar (Pavan, 2015), and we are not aware of any phenotypic trait shared by these two species that consistently distinguish them from the remaining species of <i>Mygalodelphys</i>.</p> <p> Although <i>Monodelphis ronaldi</i> has not been included in any phylogenetic analysis to date, we allocate this species to the subgenus <i>Mygalodelphys</i> based on its close phenetic similarity to <i>M. handleyi</i> (previously noted by Solari, 2007) and to its shared possession of morphological traits that seem likely to optimize as subgeneric synapomorphies, including (1) lack of a distinct frontal process of the jugal, (2) a small sphenorbital fissure within which the basisphenoid is not laterally exposed, (3) lack of parietal-mastoid contact, and (4) narrow anterior cingulids on m2 and m3. Including <i>M. ronaldi</i> in future phylogenetic analyses will effectively test the hypothesis that it is a member of <i>Mygalodelphys</i>.</p> <p> NOTES ON DISTRIBUTION AND SYMPATRY: Species of the subgenus <i>Mygalodelphys</i> are known from eastern Panama; the humid tropical and subtropical Andes (to ca. 3000 m) of Colombia, Ecuador, Peru, and Bolivia; the Guiana Highlands of southern Venezuela and western Guyana; western and southeastern Amazonia 7; the Atlantic Forest of southeastern Brazil; the Cerrado landscapes of central Brazil; and the Cerrado, Chaco, and adjacent dry-forested biomes of Bolivia, Paraguay, and northeastern Argentina (table 3). Species of <i>Mygalodelphys</i> are sympatric with <i>Pyrodelphys</i> in southwestern and southeastern Amazonia (e.g., in the lower Urubamba region of eastern Peru; Solari et al., 2001), with species of the subgenus <i>Monodelphis</i> in Amazonia and the Cerrado (e.g., at Bosque Mbaracayú in eastern Paraguay; de la Sancha et al., 2007), with species of the subgenus <i>Microdelphys</i> in the Andes and the Atlantic Forest (e.g., at Riacho Grande, São Paulo, southeastern Brazil; Pavan, 2015), and with species of <i>Monodelphiops</i> in the Atlantic Forest (e.g., at Parque Nacional do Itatiaia, southeastern Brazil; Pavan, 2015).</p> <p> 7 The southeastern Amazonian representative of <i>Mygalodelphys</i> is the still-undescribed “species 2” of Pavan et al. (2014).</p> <p> Given this wide distribution and extensive sympatry, the absence of <i>Mygalodelphys</i> throughout most of northeastern Amazonia (north of the Amazon and east of the Rio Negro), where only species of the nominotypical subgenus are known to occur in lowland habitats, is noteworthy. It is also worth noting that <i>Mygalodelphys</i> is the only subgenus known to occur in the northern Andes (north of the Huancabamba Deflection), and in northwestern Amazonia (north of the upper Amazon and west of the Rio Negro). Whether historical or ecological factors account for such distributional phenomena is unknown.</p>Published as part of <i>Pavan, Silvia E. & Voss, Robert S., 2016, A Revised Subgeneric Classification of Short-tailed Opossums (Didelphidae: Monodelphis), pp. 1-44 in American Museum Novitates 2016 (3868)</i> on pages 19-22, DOI: 10.1206/3868.1, <a href="http://zenodo.org/record/4598434">http://zenodo.org/record/4598434</a>
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