RIVISTA ITALIANA DI PALEONTOLOGIA E STRATIGRAFIA https://riviste.unimi.it/index.php/RIPS <p>The Rivista Italiana di Paleontologia e Stratigrafia is a <strong>free of charge</strong> <strong>OPEN ACCESS </strong>peer reviewed journal.</p> <p>RIPS publishes original contributions on all aspects of palaeontology and stratigraphy.</p> <p>All papers are written in English and are reviewed by international experts.</p> <p>The Journal is currently indexed and abstracted by AGI, ISI, Current Contents, Georef, Geological Abstract and SciSearch.</p> <p>In 2015 the Journal joined the Unimi Journals project (<a href="https://riviste.unimi.it/">riviste.unimi.it</a>) and it is hosted on <a href="http://pkp.sfu.ca/?q=ojs">OJS</a> platform.</p> <p><strong>Web of Science Journal Citation Reports 2018</strong>: &nbsp;Journal Impact Factor <strong>1.232</strong>, 5-Year Impact Factor&nbsp;<strong>1.270</strong>, Total Cites&nbsp;<strong>1069</strong></p> <p><strong>Scopus CiteScore 2018</strong>:&nbsp;<strong>1.53</strong></p> <p><strong>OPEN ACCESS POLICY</strong>: RIPS is published under a&nbsp;<a href="http://creativecommons.org/licenses/by-nc-nd/4.0/" target="_blank" rel="noopener">Creative Commons&nbsp;Attribution-NonCommercial-NoDerivatives Licence 4.0 International (CC BY-NC-ND 4.0)</a></p> <p>On Facebook:&nbsp;<a href="https://www.facebook.com/RIPS15/" target="_blank" rel="noopener">https://www.facebook.com/RIPS15/</a></p> <p>On Twitter:&nbsp;<a href="https://twitter.com/rivistapaleo" target="_blank" rel="noopener">https://twitter.com/rivistapaleo</a></p> <p>&nbsp;</p> Università degli Studi di Milano en-US RIVISTA ITALIANA DI PALEONTOLOGIA E STRATIGRAFIA 0035-6883 <p><a href="http://creativecommons.org/licenses/by-nc-nd/4.0/" rel="license"><img src="https://i.creativecommons.org/l/by-nc-nd/4.0/88x31.png" alt="Licenza Creative Commons" /></a><br />Rivista italiana di Paleontologia e Stratigrafia di <a href="/index.php/RIPS" rel="cc:attributionURL">http://riviste.unimi.it/index.php/RIPS</a> è distribuito con Licenza <a href="http://creativecommons.org/licenses/by-nc-nd/4.0/" rel="license">Creative Commons Attribuzione - Non commerciale - Non opere derivate 4.0 Internazionale</a>.</p><p>The journal allow the author(s) to hold the copyright without restrictions.</p> LOWER DEVONIAN (PRAGIAN) BRACHIOPODS FROM THE DASHATIAN SECTION, GUANGXI, SOUTH CHINA https://riviste.unimi.it/index.php/RIPS/article/view/15010 <p>Lower Devonian brachiopods in South China are very rare since most areas lack deposits owing to an uplift movement of the Guangxi (Caledonian) Orogeny. In this paper, we describe a brachiopod fauna consisting of 13 species in 12 genera from the Nagaoling Formation at the Dashatian section in the suburb area of the Nanning City, Guangxi, South China. This fauna is dominated by small rhynchonellide and spiriferide species, along with chonetidines, strophomenides, atrypides, athyridides and others. The early Pragian age for the brachiopod-bearing horizons in the Nagaoling Formation is constrained by the associated early Pragian conodonts <em>Eognathodus sulcatus</em> Zone. About 33% genera of the brachiopod fauna are endemic to South China, therefore they do not provide any clear evidence for its paleobiogeographical link to the faunas of Europe, Australia, or North America. This fauna is paleoecologically interpreted as being deposited in a shallow, oxygen-rich, low to moderate energy, subtidal palaeoenvironment in the early Pragian and it corresponds to the benthic assemblage BA2 to upper BA3</p> LI QIAO BO CHEN SHU-ZHONG SHEN Copyright (c) 0 2021-01-19 2021-01-19 127 1 10.13130/2039-4942/15010 EURHINODELPHINIDS FROM THE EARLY MIOCENE OF PERU: FIRST UNAMBIGUOUS RECORDS OF THESE HYPER-LONGIROSTRINE DOLPHINS OUTSIDE THE NORTH ATLANTIC REALM https://riviste.unimi.it/index.php/RIPS/article/view/15124 <p>Among the many hyper-longirostrine dolphins (Odontoceti) from the Miocene, members of the family Eurhinodelphinidae bear two highly distinctive cranial features: a long and edentulous premaxillary portion of the rostrum and a mandible that is significantly shorter than the rostrum. Until now, unambiguously attributed members of this clade were only recorded from early to middle Miocene deposits of the North Atlantic realm (east coast U.S.A., North Sea Basin, and Mediterranean). In this work we describe and compare two partial skulls of longirostrine dolphins from late early Miocene (Burdigalian, 19.25-18 Ma) marine deposits of the Chilcatay Formation, in the East Pisco Basin (southern coast of Peru), preserving rostral and mandibular material, as well as ear bones. Based on these specimens we report diagnostic remains attributable to this family for the first time for the whole Southern Hemisphere and the whole Pacific Ocean. This major expansion of eurhinodelphinids' palaeogeographic distribution contrasts with their proposed shallow-water, coastal environments; it suggests a new dispersal route for members of the family across the Central American Seaway; and it further highlights the similarities between the odontocete faunas of the southeastern Pacific and North Atlantic realm during the Miocene. Better-preserved eurhinodelphinid specimens from the odontocete-rich Chilcatay Formation will allow for a more detailed comparison with North Atlantic members of the family.</p> OLIVIER LAMBERT CHRISTIAN DE MUIZON RAFAEL M. VARAS-MALCA MARIO URBINA GIOVANNI BIANUCCI Copyright (c) 0 2021-01-26 2021-01-26 127 1 10.13130/2039-4942/15124 FIRST REVIEW OF THE LYNCODONTINI MATERIAL (MUSTELIDAE, CARNIVORA, MAMMALIA) FROM THE LOWER PLEISTOCENE ARCHAEO-PALAEONTOLOGICAL SITES OF ORCE (SOUTHEASTERN SPAIN) https://riviste.unimi.it/index.php/RIPS/article/view/15132 <p>Two archaeo-palaeontological Lower Pleistocene sites of Orce (Baza Basin, SE Spain), Fuente Nueva 3 (1.3 Ma) and Barranco León (1.4 Ma), preserve some of the earliest evidences of human presence in the European continent. During the 2013 field season, a small Lyncodontini mustelid mandible was found at Fuente Nueva-3. This finding was accompanied by a lower canine (c1), also from the same site, and a lower fourth premolar (p4) from Barranco León. Here, we report on the morphological and biometrical study of these materials, in comparison to other Eurasian Pliocene-Pleistocene species of the tribe Lyncodontini. The analyses revealed an affinity between the taxon from Fuente Nueva-3 and Barranco León with the small-sized European species <em>Martellictis ardea</em> (Gervais, 1848-1852), allowing us to ascribe the described material to the latter species. The presence of <em>M. ardea</em> in the sites of Orce is the southernmost occurrence of the species in the Iberian Peninsula and an important finding in the scarce fossil record of Lyncodontini in Europe.</p> SERGIO ROS-MONTOYA SAVERIO BARTOLINI-LUCENTI M. PATROCINIO ESPIGARES PAUL PALMQVIST BIENVENIDO MARTÍNEZ-NAVARRO Copyright (c) 0 2021-01-29 2021-01-29 127 1 10.13130/2039-4942/15132 A NEW SPECIES OF <em>SAURICHTHYS</em> (ACTINOPTERYGII: SAURICHTYDAE) FROM THE MIDDLE TRIASSIC OF MONTE SAN GIORGIO https://riviste.unimi.it/index.php/RIPS/article/view/15143 <p>A new species of the actinopterygian fish genus <em>Saurichthys</em> is described on the basis of several specimens from the Sceltrich beds (Meride Limestone Formation) of the UNESCO World Heritage area of Monte San Giorgio. The new species shows among other characters, unsegmented lepidotrichia in all fins and elongated and wide paired fins, suggesting a different adaptation for swimming and catching preys with respect to other <em>Saurichthys</em> species of Monte San Giorgio. Phylogenetic analysis suggests that the new species is closely related to the <em>Saurorhynchus</em> species group. The new finding adds further knowledge to the plasticity and functional adaptations of the genus <em>Saurichthys</em>, which was one of the most successful actinopterygians of the Triassic.</p> SILVIO RENESTO FABIO MAGNANI RUDOLF STOCKAR Copyright (c) 0 2021-02-03 2021-02-03 127 1 10.13130/2039-4942/15143 REVIEW OF EARLY TRIASSIC THYLACOCEPHALA https://riviste.unimi.it/index.php/RIPS/article/view/15188 <p>Thylacocephala (Euarthropoda: Eucrustacea?) is a group of enigmatic fossil euarthropods, known from at least the Silurian to the Cretaceous. The Triassic is considered to be the period during which thylacocephalans were the most diversified with 17 species reported from 19 localities in nine countries. However, Thylacocephala were assumed to be rare during the Early Triassic until recent discoveries in Japan, Nevada and Idaho, U.S.A.&nbsp; &nbsp; &nbsp; &nbsp;Our study focuses on thylacocephalans from the Early Triassic, especially from Madagascar and Idaho. The revision of previously known taxa from Madagascar provides new important information. A new kind of ornamentation is reported for <em>Paraostenia ambatolokobensis</em> nov. comb., previously assigned to <em>Ostenocaris ambatolokobensis</em>. In addition, <em>Ankitokazocaris acutirostris</em> and<em> Paraostenia ambatolokobensis</em> are only the third and fourth thylacocephalan taxa for which possible cephalic appendages are described.&nbsp; New occurrences of Thylacocephala in Nevada and Idaho, U.S.A., lead to the description of one new taxon and to the reassignement of<em> Parisicaris triassica</em> to <em>Ankitokazocaris triassica</em> nov. comb. Those occurrences provide a significant contribution to the knowledge of Thylacocephala taxonomic diversity and geographic distribution during the Early Triassic. An important revision of Early Triassic thylacocephalan taxa from Japan and China is also performed, including<em> Ankitokazocaris chaohuensis</em>,<em> Ankitokazocaris parva </em>nov. comb., <em>Ankitokazocaris utatsuensis </em>nov. comb. and<em> Paraostenia</em> sp. Overall, the taxonomic diversity of Triassic thylacocephalans has likely been slightly over-estimated (17 species before, 15 now). However, the Triassic represents the richest period in terms of thylacocephalan-bearing outcrops (19 localities from nine countries).</p> THOMAS LAVILLE CHRISTOPHER. P. A. SMITH MARIE-BÉATRICE FOREL ARNAUD BRAYARD SYLVAIN CHARBONNIER Copyright (c) 0 2021-02-25 2021-02-25 127 1 10.13130/2039-4942/15188 LOWER PLIOCENE BARNACLE FACIES OF WESTERN LIGURIA (NW ITALY): A PEEK INTO A WARM PAST AND A GLIMPSE OF OUR INCOMING FUTURE https://riviste.unimi.it/index.php/RIPS/article/view/15202 <p>The lower Pliocene deposits of Pairola (Liguria, Italy) display the otherwise rare occurrence of rock-forming amounts of barnacles (mostly belonging to the extinct Euromediterranean species <em>Concavus concavus</em>). Three main facies are recognised in the investigated succession: a barnacle-dominated facies, which formed along a shallow (&lt;15 m deep) nearshore environment, a foraminifera-dominated facies from relatively deeper waters (40-100 m), and an intermediate facies forming at the boundary of the other two. These facies and their relationships suggest deposition in a flooded valley – a kind of setting that was common in the Mediterranean after the Messinian Salinity Crisis. Differing from other rias, the Pairola basin was exposed to strong waves, resulting in conditions favourable to barnacles. Sedimentological and stratigraphic observations indicate that the Pairola succession formed within a timespan covering both cold and warm phases. This is relevant because the sub-tropical foraminifer <em>Amphistegina</em> is ubiquitous throughout the succession. <em>Amphistegina</em> occurs in the Pliocene and lower Pleistocene (Gelasian) of Northern Italy, but not in the remainder of the Pleistocene, not even its warm portions. This genus is currently recolonizing the Mediterranean and is projected to reach the northern coast of the basin soon, foretelling that Anthropocene temperatures are going to overcome those of the late Pleistocene warm periods and reach those of the Pliocene.</p> GIOVANNI COLETTI GIULIA BOSIO ALBERTO COLLARETA Copyright (c) 0 2021-03-01 2021-03-01 127 1 10.13130/2039-4942/15202 A NEW LARGE-SIZED PLIOCENE FOX (CARNIVORA, CANIDAE) FROM YUSHE BASIN (SHANXI, CHINA) https://riviste.unimi.it/index.php/RIPS/article/view/15206 <p>The Yushe Basin (Shanxi, China) represent one of the most renowned location of China for Upper Miocene-Lower Pleistocene fossiliferous beds, with an outstanding record of vertebrates, often reference to other Asian localities. Fossils from the town of Xiakou are considered among the oldest records (late Gaozhuang-earliest Mazegouan) of <em>Eucyon</em> <em>davisi</em> in the Basin. Nevertheless, the study of some Early Pliocene specimens of this sample attributed to <em>E. davisi</em> possess several features typical of <em>Vulpes</em>. The revision of this material in comparison with that of other fossil fox species from Asia revealed the peculiarity of the <em>Vulpes</em> from Xiakou, both metrically and morphologically, leading to the description of a new species, <em>Vulpes rooki</em> sp. nov. Dental features and proportions suggest that this large-sized fox had probably a hypercarnivorous diet, unlike the similar-sized <em>E. davisi</em>. Following other results in literature, the considerably diverse fossil record of canids in the Yushe Basin supports the interpretation of niche partitioning among these species during the Early Pliocene.</p> SAVERIO BARTOLINI LUCENTI Copyright (c) 0 2021-03-02 2021-03-02 127 1 10.13130/2039-4942/15206 MERCURY INTRUSION POROSIMETRY TO EVALUATE THE INCIDENCE OF BIOTURBATION ON POROSITY OF CONTOURITES https://riviste.unimi.it/index.php/RIPS/article/view/15208 <p>The effect of bioturbation on rocks’ flow-media properties (e.g., porosity and permeability) and its impact on reservoir quality has been previously documented. However, the occurrence of ichnological features and their impact on rock properties in contourite deposits, a facies of economic interest, is poorly known. The study evaluates the effects of bioturbation on different types of contourite facies, particularly dominantly calcareous contourites and sandy clastic contourites, using mercury intrusion porosimetry. Porosity (total, intraparticle and interparticle) is characterized in selected samples, comparing the host rock with the infills of the trace fossils; <em>Macaronichnus</em>, <em>Parahaentzschelinia </em>and<em> Scolicia</em> from El Adergha and Kirmta sections in Morocco, and <em>Chondrites</em>, <em>Planolites</em> and <em>Thalassinoides</em> from Petra Tou Romiou, Agios Konstantinos, and Kalavassos outcrops in Cyprus. The obtained data reveal variance between porosities according to different types of contourite facies and trace fossils. Total porosity shows similar values for the host sediment in clastic and calcarenitic contourites, but interparticle porosity is nearly absent in calcarenitic contourites, where intraparticle porosity is almost exclusive. This is owing to the abundance of foraminifera chambers that increase intraparticle primary porosity. Regarding the ichnotaxa, higher total porosity values were obtained from the infilling material of <em>Parahaentzschelinia</em>, <em>Scolicia</em> and <em>Macaronichnus</em>, which could be related with the redistribution of grains by trace makers during feeding activity. Considering the impact of bioturbation on reservoir quality, there are significant differences between clastic and calcareous contourites. In the clastic contourites, bioturbation increases in the total porosity, particularly interparticle porosity, suggesting a positive impact for the reservoir properties of the studied units. However, in calcarenitic and muddy chalk contouritic facies, bioturbation has a minor effect on porosity and no predictable influence on the flow-media characteristics.</p> FRANCISCO J. RODRÍGUEZ-TOVAR OLMO MIGUEZ-SALAS JAVIER DORADOR Copyright (c) 0 2021-03-02 2021-03-02 127 1 10.13130/2039-4942/15208 NEW DATA ON THE EARLY JURASSIC BIODIVERSITY OF THE LOMBARDY BASIN (SOUTHERN ALPS, ITALY) AND THE EARLIEST RECORD <em>SPHENODUS</em> (CHONDRICHTHYES, NEOSELACHII) https://riviste.unimi.it/index.php/RIPS/article/view/15225 <p>At the beginning of the Jurassic, the initial stages of the rifting that preceded the opening of the Alpine Tethys led to the establishment of the Lombardy basin, characterized by a shallow water marine palaeoenvironment inhabited by highly diversified ecological communities. Macrofossil records from the whole Lower Jurassic succession of Lombardy are currently mostly confined to invertebrates. The earliest occurrence of marine vertebrates is from the Sinemurian Moltrasio Limestone of Osteno (Varese), subsequent to the Triassic/Jurassic boundary (TJB) post-crisis recovery. Here, we describe material from the Roncola section (Roncola San Bernardo, Bergamo) of the Sedrina Limestone (upper Hettangian), consisting of a dense accumulation of crinoid skeletal remains belonging to <em>Balanocrinus ticinensis</em> Hess, 2006. Among them are three isolated neoselachian teeth assigned to the genus <em>Sphenodus </em>Agassiz, 1843. This new discovery is significant and extends our knowledge of the biodiversity of the Lombardy basin Jurassic, mainly because these dental remains represent the earliest vertebrate macrofossils ever documented from this area after the Triassic/Jurassic boundary. <em>Sphenodus </em>(which ranges from the Sinemurian to the Danian) is a fairly ubiquitous Sinemurian neoselachian shark but this new record moves its First Appearance Datum (FAD) back to the Hettangian stage.</p> LUCA JASELLI CHRISTOPHER J. DUFFIN Copyright (c) 0 2021-03-10 2021-03-10 127 1 10.13130/2039-4942/15225 MIDDLE PLEISTOCENE FOX FROM THE VALLPARADÍS SECTION (VALLÈS-PENEDÈS BASIN, NE IBERIAN PENINSULA) AND THE EARLIEST RECORDS OF THE EXTANT RED FOX https://riviste.unimi.it/index.php/RIPS/article/view/15229 <p>Dentognathic remains of European Middle Pleistocene Vulpini are scarce and fragmentary. They have classically been attributed to several species, but many taxonomic and phylogenetic uncertainties remain. Here we describe a fox well-preserved maxilla with associated mandible from the Middle Pleistocene layers of the Vallparadís Section (EVT3; ca. 0.6 Ma; Vallès-Penedès Basin, NE Iberian Peninsula) and compare them with the known fossil record of <em>Vulpes</em> from roughly contemporary European localities. The studied <em>Vulpes</em> remains described here differ from Early Pleistocene <em>Vulpes alopecoides</em> (including its junior synonyms <em>V. praeglacialis </em>and<em> V. praecorsac</em>) in several dentognathic features (less individualized P4 protocone; M2 paracone larger than the metacone; more robust mandibular corpus, and stouter m1 with reduced metaconid) and most closely resemble extant <em>Vulpes vulpes</em>. The large size of the described remains also contrasts with the small dimensions of <em>V. alopecoides </em>and fits better within the variability of the extant red fox. We conclude that the studied specimens, like other available Middle Pleistocene fox remains from Europe, are attributable to the extant species <em>V. vulpes</em>. Therefore, the EVT3 remains represent the first well-dated appearance datum of the species in Europe.</p> JOAN MADURELL-MALAPEIRA SAVERIO BARTOLINI LUCENTI DAVID M. ALBA Copyright (c) 0 2021-03-11 2021-03-11 127 1 10.13130/2039-4942/15229