Journal of Paleontology最新文献

{"title":"The late Miocene Erinaceidae and Dimylidae (Eulipotyphla, Mammalia) from the Pannonian region, Slovakia","authors":"Florentin Cailleux, L. W. H. Ostende, P. Joniak","doi":"10.1017/jpa.2023.50","DOIUrl":"https://doi.org/10.1017/jpa.2023.50","url":null,"abstract":"Non-technical Summary. The late Miocene (11.5–5.5 million years ago) was a period of faunal change for small mammal communities. The evolution of several climatic parameters has greatly impacted faunas from Europe, and the surviving species also had to deal with the competitive pressure of new migrant species into Europe. In this context, mammal groups having high sensitivity to climatic parameters, such as temperature and humidity, show peculiar patterns of evolution. This is the case for the Erinaceidae (hedgehogs and gymnures) and the extinct family Dimylidae, well recorded in the fauna from the late Miocene of Slovakia. At least six Erinaceidae and two Dimylidae were present in Slovakia during that time, as shown by material extracted from the localities of Borský Svätý Jur, Krásno, Pezinok, Šalgovce, Studienka, and Triblavina. Both families were extremely abundant during the early part of the late Miocene, the Vallesian (11.5–9.0 million years ago), supporting the idea that central Europe played an important role in the preservation of high paleodiversity of insectivore species. However, the abundance of the Erinaceidae and Dimylidae strongly declined afterward, eventually leading to the extinction of the Dimylidae soon after the Vallesian. On a smaller scale, the material described from the late Miocene of Slovakia brings a lot of new information about the morphology, variability, and phylogeny of the identified species, namely ‘Schizogalerix’ voesendorfensis, Schizogalerix cf. S. moedlingensis, Lantanotherium sanmigueli, Atelerix cf. A. depereti, Atelerix aff. A. depereti, cf. Postpalerinaceus sp. indet., Erinaceinae gen. indet. sp. indet., Plesiodimylus chantrei, and Metacordylodon aff. M. schlosseri. Abstract. The families Erinaceidae and Dimylidae are represented in the late Miocene localities of Slovakia (Borský Svätý Jur, Krásno, Pezinok, Šalgovce, Studienka, and Triblavina) by at least six hedgehog species—‘Schizogalerix’ voesendorfensis (Rabeder, 1973); Schizogalerix cf. S. moedlingensis (Rabeder, 1973); Lantanotherium sanmigueli Villalta and Crusafont, 1944; Atelerix cf. A. depereti Mein and Ginsburg, 2002; Atelerix aff. A. depereti, cf. Postpalerinaceus sp. indet., and Erinaceinae gen. indet. sp. indet.—and two dimylid species—Plesiodimylus chantrei Gaillard, 1897; and Metacordylodon aff. M. schlosseri (Andreae, 1904). Material of L. sanmigueli from the western Carpathians was investigated, revealing broad variability in all samples. Additionally, the deciduous premolars of Lantanotherium Filhol, 1888 are described here for the first time. Erinaceid species are frequent in the Vallesian but their abundance strongly declined afterward. As an exception, Schizogalerix Engesser, 1980 re-entered the Danube and Vienna basins during MN11, likely from eastern Europe. Members of Erinaceinae display low diversity during the late Miocene of central Europe, which tends to support a pan-European diversity phenomenon. The humidity-dependent Dim","PeriodicalId":507883,"journal":{"name":"Journal of Paleontology","volume":"136 1","pages":"777 - 798"},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139364889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"JPA volume 97 issue 4 Cover","authors":"","doi":"10.1017/jpa.2023.78","DOIUrl":"https://doi.org/10.1017/jpa.2023.78","url":null,"abstract":"","PeriodicalId":507883,"journal":{"name":"Journal of Paleontology","volume":"43 1","pages":"f1 - f2"},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139365248","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Examining the ontogeny of the Pennsylvanian cladid crinoid Erisocrinus typus Meek and Worthen, 1865","authors":"Noel J. Hernandez Gomez, Lisette E. Melendez, Whitney A. Lapic, Sarah L. Sheffield, Ronald D. Lewis","doi":"10.1017/jpa.2023.41","DOIUrl":"https://doi.org/10.1017/jpa.2023.41","url":null,"abstract":"Non-technical Summary. Crinoids, the group known today as the sea lilies, were a major constituent of ocean environments from the late Carboniferous (323–299 million years ago). However, crinoid fossil-forming potential is poor, and they typically fell apart quickly after death. This limits our ability to study much about their life histories, including how they would have grown. Through the discovery of an area of exceptional fossil preservation in the Barnsdall Formation of Oklahoma, we have a rare chance to learn about the growth of one of these species of crinoids, Erisocrinus typus. Here we perform a growth analysis of a well-preserved series of fossils and discuss the patterns that it showed from its juvenile stage to adulthood. Abstract. Crinoids were major constituents of late Carboniferous (Pennsylvanian) marine ecosystems, but their rapid disarticulation rates after death result in few well-preserved specimens, limiting the study of their growth. This is amplified for cladids, who had among the highest disarticulation rates of all Paleozoic crinoids due to the relatively loose suturing of the calyx plates. However, Erisocrinus typus Meek and Worthen, 1865 has been found in unusually large numbers, most preserved as cups but some as nearly complete crowns, in the Barnsdall Formation in Oklahoma. The Barnsdall Formation, a Koncentrat Lagerstätte, is composed predominantly of fine- to medium-grained sandstone, overlain by mudstone and shale; severe compaction of the fossils in the mudstone and shale layer in this formation allowed for exceptional preservation of the plates. Herein, we summarize a growth study based on 10 crowns of E. typus, showcasing a well-defined growth series of this species from the Barnsdall Formation, including fossils from juvenile stages of development, which are rarely preserved. We used high-resolution photographs imported into ImageJ and recorded measurements of the cup and arms for all nondistorted or disarticulated plates. Results show that the plates of the cup grew anisometrically with both positive and negative allometry. The primibrachial plates of E. typus grew with positive allometry. The brachial plates started as uniserial (i.e., cuneiform) as juveniles but shifted to be biserial. Erisocrinus typus broadly shares similar growth trajectories with other cladids. These growth patterns provide insight into feeding strategies and can aid in understanding crinoid evolutionary paleoecological trends.","PeriodicalId":507883,"journal":{"name":"Journal of Paleontology","volume":"10 1","pages":"906 - 913"},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139365507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}