{"title":"STUDIES ON PYCNODONT FISHES (II): REVISION OF THE SUBFAMILY PYCNODONTINAE, WITH SPECIAL REFERENCE TO ITALIAN FORMS","authors":"F. J. Poyato-Ariza","doi":"10.13130/2039-4942/13514","DOIUrl":"https://doi.org/10.13130/2039-4942/13514","url":null,"abstract":"The diagnosis, composition, and phylogenetic relationships of the European subfamily Pycnodontinae are revised; its record is pushed back from the Cenozoic into the Mesozoic. The Pycnodontinae is confirmed as a monophyletic group. It is diagnosed by: thin, laminar supraoccipital exposed all along the posterior border of the skull roof; cleithrum with two posterior expansions framing the notch for the pectoral fin; reduction in the ossification of the flank scales (clathrate pattern); reduction of the preopercular into a very low bone, never higher than the exposed, ornamented portion of the dermohyomandibular; and presence of a bifid cloacal scale. The subfamily includes the tribe Pycnodontini (Pycnodus + Oropycnodus), Polazzodus, Sylvienodus, and Tergestinia. The former “Coelodus” gridellii is moved to Polazzodus gridellii n. comb. The Italian genera, Pycnodus, Polazzodus, and Tergestinia, form a monophyletic group together with the French Oropycnodus. The present analysis shows that Polazzodus, Sylvienodus, and Tergestinia are pycnodontin fishes, but. Haqelpycnodus, Libanopycnodus, Scalacurvichthys, and Sigmapycnodus do not belong to the Pycnodontinae. “Pseudopycnodus” and “P. nardoensis” are considered nomina dubia. This revision has revealed new aspects of the last known diversification in the evolutionary history of the Pycnodontiformes, showing that the group was still thriving in the Western Tethys during the Late Cretaceous. For the present analysis, additional arguments involving ontogenetic restrictions are provided to favour ordering multistate characters in pycnodonts.","PeriodicalId":54451,"journal":{"name":"Rivista Italiana Di Paleontologia E Stratigrafia","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2020-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43171568","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"PLIOCENE AND PLEISTOCENE DEPOSITIONAL ENVIRONMENTS IN THE PESCULUSE AREA (SALENTO, ITALY)","authors":"A. D'alessandro, F. Massari","doi":"10.54103/2039-4942/13450","DOIUrl":"https://doi.org/10.54103/2039-4942/13450","url":null,"abstract":"An integrated sedlmentologic and palaeoecologic approach is used to define the evolving Pliocene, Early and Middle Pleistocene depositional environments in the Pesculuse area. Lower Pliocene deposits show evidence of a quiet outer-shelf setting, apparently not affected by the physiography of the transgressed palaeotopography. In contrast, the onlap of Upper Pliocene carbonate deposits onto topographic highs testifies that sedlmentation was preceded by a block-faulting event. The Late Pliocene transgression flooded a subaerial karstic landscape. A ridge of Cretaceous limestone created a protected enuronment, In which wavy bedforms of exceptional scale, which are thought to result from tsunami surges, were generated and preserved. At this stage, different palaeocommunities settled in several shallow-water micro-environments.","PeriodicalId":54451,"journal":{"name":"Rivista Italiana Di Paleontologia E Stratigrafia","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2020-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48772308","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"CAVOLINIDAE DEL MIOCENE INFERIORE Dl CASTELSARDO (SARDEGNA SETTENTRIONALE)","authors":"C. Spano","doi":"10.54103/2039-4942/13447","DOIUrl":"https://doi.org/10.54103/2039-4942/13447","url":null,"abstract":"In this paper are described and illustrated Pteropoda coming frorn two Lower Miocene sections exposed near the village of Castelsardo (Norhern Sardinia). The sampled sections cover a stratigraphic range which extends from the basal part of zone N4 to uppermost N6 (after Blow's planktonic foraminiferal zonation), that means an Aquitaman—Burdigalian age.","PeriodicalId":54451,"journal":{"name":"Rivista Italiana Di Paleontologia E Stratigrafia","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2020-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141205451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"BIOEROSION IN THE PLEISTOCENE OF SOUTHERN ITALY: ICHNOGENERA CAULOSTREPSIS AND MAEANDROPOLYDORA","authors":"R. Bromley, A. D'alessandro","doi":"10.54103/2039-4942/13448","DOIUrl":"https://doi.org/10.54103/2039-4942/13448","url":null,"abstract":"The ichnogenera Caulostrepsis Clarke and Maeandropolydora Voigt are re—examined and redescribed on the basis of new material from Cretaceous deposits at Ivö (Sweden) and in particular from Pleistocene deposits from southern Italy. The morphological differences between the two ichnogenera are explained as having originated by different modes of substrate penetration. Maeandropolydora's gallery is extended from the end of one limb (axial boring), whereas Caulostrepsis's gallery advances at the vertex (lateral boring). Combinations of the two processes give rise to intermediate forms: Caulostrepsis contorta, in which lateral boring prevails and Maeandropolydora decipiens, in which axial boring is predominant. Structures that are U—shaped or produced by elaboration of this basic U—plan (C. contorta) are referred to the ichnogenus Caulostrepsis; the ichnospecies are separated according to presence/absence of vane, pouches, apertural pits and apertural grooves. The different ichnospecies of Maeandropolydora are characterized by presence or absence of pouches or by galleries tending to run in pairs,","PeriodicalId":54451,"journal":{"name":"Rivista Italiana Di Paleontologia E Stratigrafia","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2020-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141205540","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"THE MACROSEMIIDAE (PISCES, ACTINOPTERYGII) FROM THE UPPER TRIASSIC OF LOMBARDY (N. ITALY)","authors":"A. Tintori, S. Renesto","doi":"10.54103/2039-4942/13442","DOIUrl":"https://doi.org/10.54103/2039-4942/13442","url":null,"abstract":"A new species of Macrosemiid, Legnonotus obtusus sp. n. from Carnian aged rocks near Varese, Lombardy, Italy, is briefly described and a redescription given of the species Legnonotus krambergeri Bartram based on new material from the Upper Norian beds of the Prealps near Bergamo. It is concluded that Legnonotus is a primitive Macrosemiid.","PeriodicalId":54451,"journal":{"name":"Rivista Italiana Di Paleontologia E Stratigrafia","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2020-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141205396","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"EVOLUZIONE DEL SETTORE SETTENTRIONALE DELLA PIATTAFORMA CARBONATICA ADRIATICA","authors":"A. Cavallin, Camilla PIRINI RADRIZZANI","doi":"10.54103/2039-4942/13443","DOIUrl":"https://doi.org/10.54103/2039-4942/13443","url":null,"abstract":"The eastern Southern Alps are characterized by the superimposition of alpine and dinaric tectonic clcmcnts; the bedrock Of the Friulan plane is composed by structural elements that represent the prosecution of the External Dinarides. \u0000This structural setting is the result of the dinaric, alpine and, partly, apenninic tectogeno—sedimentary processes which affected from the Upper Cretaceous to the present an area with peculiar palaeogeographic characters. During the Jurassic—Cretaceous times infact an ' 'adriatic\" carbonatic platform developed with some basins at its- edges: the Belluno, Carnic and Tolmino basins. \u0000The authors propose here, on the basis of stratigraphic, tectonic and physiographic elements and with palaeogeographic reconstruction, an evolutionary model of the area that takes in account all these factors, thelr influence and their interactions.","PeriodicalId":54451,"journal":{"name":"Rivista Italiana Di Paleontologia E Stratigrafia","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2020-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141205726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"ANISIAN SEDIMENTATION AND TECTONICS OF THE M. PORE — M. CERNERA AREA (DOLOMITES)","authors":"Wolfgang Blendinger","doi":"10.54103/2039-4942/13441","DOIUrl":"https://doi.org/10.54103/2039-4942/13441","url":null,"abstract":"Vengono descritti l'ambiente deposizionale e la tettonica anisica nella regione del M. Pore e M. Cernera (Dolomiti orientali). \u0000La parte anisica (?) della Formazione di Werfen (Membro di Cencenighe, Membro di San Lucano) è caratterizzata da una sedimentazione clastica e carbonatica, che passa a una facies evaporitica nella parte superiore. Dopo una breve emersione si sono depositati carbonati peritidali (Formazione 'del Serla inferiore). Nel Pelsonico inferiore questa piattaforma si disintegra. La deposizione del sovrastante Gruppo di Braies comincia con conglomerati fluviali (Conglomerati di Pizsda Peres intermedi), La trasgressione successiva inizia con sedimenti di spiaggia (Formazione di Agordo) e passa a siltiti bacinali (Formazione di Dont, Pelsonico — Illirico inferiore). Nell'Illirico inferiore una regressione causa l'avanzamento di una piattaforma carbonatica ( «formazione calcarea») da ovest ad est verso il bacino. Forti afflussi terrigeni soffocano localmente Io sviluppo della piattaforma nella parte inferiore (?) dell'Illirico superiore (Conglomerati di Piz da Peres superiori). Nell'Illirico superiore si estende di nuovo l'ambiente di una piattaforma carbonatica (Formazione del Serla superiore). Contemporaneamente si approfondisce un bacino verso est, dove vengono depositate marne e torbiditi (Formazione delt'Ambata).","PeriodicalId":54451,"journal":{"name":"Rivista Italiana Di Paleontologia E Stratigrafia","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2020-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141205634","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"BENTHIC FORAMINIFERA AS POLLUTION INDICES IN THE MARINE ENVIRONMENT OF WEST COAST OF INDIA","authors":"M. Setty, R. Nigam","doi":"10.54103/2039-4942/13432","DOIUrl":"https://doi.org/10.54103/2039-4942/13432","url":null,"abstract":"Two ecosystems affected by acidic pollutants (Thana Creek, Bombay and inshore area of Trivandrum, Kerala) and two other ecosystems affected by alkaline pollutants (Cola Bay, Goa and inshore area of Karwar, Karnataka) were studied for pollution effects monitoring through Foraminifera. In the Thana Creek area, Bombay, the magnitude of corrosive effect, lower—than—normal ornamentation, deepening of grooves and sutural thickenings, enlargement of pores, widening of apertures in Foraminifera were taken as indices of pollution effect. In the, Cola bay area, Goa, the environment becomes hypertrophic resulting in large—sized, robust, mostly megalospheric forms of Ammonia. Elphidium and Florilus scaphum are recorded at the proximal zone near the discharge point; miliolids in the transitional zone and dominantly smaller—sized Nonionella, Fursenkoina pontoni, Bulimina marginata at the distal zone quite far from thc discharge point where pollutants are diluted and dissipated. In the Karwär area, Karnataka, pollutant causes reduced diversity with a decrease in foraminiferal population. Moreover, there is a reduction in size followed by test wall thinning in Nonion and Ammonia, increase of agglutinated forms near shore, and dispersal and dilution of the pollutants resulting in foraminiferal abundance. In the Trivandrum area, Kerala, the effluent effect presents morphological anomalies (Operculina, Cibicides), erosion along peripheries, induced growth in last few chambers, inferred dissolution and consequent destruction of small, thin—walled forms suggested by their absence, thus leaving only the larger ones in the entire area. Living/dead ratio is negatively oriented at all sites.","PeriodicalId":54451,"journal":{"name":"Rivista Italiana Di Paleontologia E Stratigrafia","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2020-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141206008","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"THE OLIGOCENE FORAMINIFERAL BIOSTRATIGRAPHY OF PAKISTAN","authors":"A. A. Kureshy","doi":"10.54103/2039-4942/13430","DOIUrl":"https://doi.org/10.54103/2039-4942/13430","url":null,"abstract":"The marine Oligocene deposits of Pakistan are exposed in the Baluchistan and Lower Indus Basins. The Baluchistan Basin deposits are referred to the Khojak Formation of Makran Group. They represent three planktic foraminiferal zones, the Globigerina ampliapertura Zone, G. ciperoensis Zone and Globorotalia kugleri Zone, corresponding to Early, Middle and Late Oligocene. The Lower Indus Basin deposits of Sind include the Kirthar and Nari Formations. On the basis of the larger Foraminifera these deposits are divided into Nummulites fichteli Zone (Early Oligocene), N. fichteli/Lepidocyclina (E.) dilatata Zone (Mid. Oligocene), and L. dilatata Zone (Late Oligocene). The Oligocene deposits are absent in the Upper Indus Basin due to the orogenic movement which took place at the end of the Eocene and continued in the Oligocene.","PeriodicalId":54451,"journal":{"name":"Rivista Italiana Di Paleontologia E Stratigrafia","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2020-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141206164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"OXYGEN AND CARBON ISOTOPE STUDY IN THE LATE EOCENE SEDIMENTS OF POSSAGNO (NORTHERN ITALY)","authors":"Hedi Oberhänsli, Angela Grünig, René Herb","doi":"10.54103/2039-4942/13429","DOIUrl":"https://doi.org/10.54103/2039-4942/13429","url":null,"abstract":"Oxygen and carbon isotope data of several benthic and planktonic species of Foraminifera from a regressive sequence in northeastern Italy indicate a watermass change during the Late Eocene, In the middle of zone P 16 the Belluno Basin Was temporari/y cut off from the open ocean. This was probably provoked by 1) worldwide sea—level Iowering during the Late Eocene •and 2) tectonic activity in the relict Tethyan realm and the adjacent areas. The isolation apparently resulted in a temporary salinity increase in the relict basin. \u0000A pronounced oxygen isotope excursion at the base of P 16 could be explained by diagenetic changes. The formation of globular cement in the chambcr cavities of Foraminifera is due either to phreatic water infiltration promoted by the preceding shoaling of the sedimentary environment, or to a temporarily increased geothermal gradient resulting from the volcanic activity in the Colli Euganei. \u0000 The genera and species of the superfamily Buliminacea are enriched in 16O relative to the taxa belonging to the superfamily Cassidulinacea. The δ18C of Nodosariacea are mostly intermediate. \u0000The oxygen isotope fractionation of benthic Foraminifera caused by biologica) processes (i.e. vital effect) seems to be somehow related to the wall structure (e.g. systematic classification).","PeriodicalId":54451,"journal":{"name":"Rivista Italiana Di Paleontologia E Stratigrafia","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2020-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141205934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}