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  • 1.
    Abbassi, Nasrollah
    et al.
    Univ Zanjan, Dept Geol, Fac Sci, Zanjan, Iran..
    Kundrat, Martin
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för organismbiologi, Evolution och utvecklingsbiologi.
    Ataabadi, Majid Mirzaie
    Univ Zanjan, Dept Geol, Fac Sci, Zanjan, Iran..
    Ahlberg, Per E.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för organismbiologi, Evolution och utvecklingsbiologi. Uppsala Univ, Sub Dept Evolut & Dev, Evolutionary Biol Ctr, Dept Organismal Biol, Uppsala, Sweden..
    Avian ichnia and other vertebrate trace fossils from the Neogene Red Beds of Tarom valley in north-western Iran2016Inngår i: Historical Biology, ISSN 0891-2963, E-ISSN 1029-2381, Vol. 28, nr 8, s. 1075-1089Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The Neogene Red Beds of the Tarom valley (north-western Iran) include conglomerate, sandstone, marl and gypsum. Avian and mammal footprints were discovered in one of the sandstone layers at the base of a third Miocene stratigraphical unit in the Gilankesheh area located in the east Tarom valley. The avian ichnia include Aviadactyla vialovi, Avipeda filiportatis, Charadriipeda disjuncta, Charadriipeda isp. A and B and cf. Ornithotarnocia lambrechti. Bird feeding traces are preserved as bilobate, loop-shaped, sinusoidal and ring-like traces. We have also identified a reticulate texture of sole scale imprints in some of the avian ichnia. Two mammal footprints of camelid-like artiodactyls are also present with the avian ichno-assemblage.

  • 2.
    Chen, Donglei
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för organismbiologi, Evolution och utvecklingsbiologi.
    Janvier, Philippe
    Département Histoire de la Terre, Muséum National d'Histoire Naturelle,.
    Ahlberg, Per
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för organismbiologi, Evolution och utvecklingsbiologi.
    Blom, Henning
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för organismbiologi, Evolution och utvecklingsbiologi.
    Scale morphology and squamation of the Late Silurian osteichthyan Andreolepis from Gotland, Sweden2012Inngår i: Historical Biology, ISSN 0891-2963, E-ISSN 1029-2381, Vol. 24, nr 4, s. 411-423Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The origin of osteichthyans (bony fishes and tetrapods) dates back to the Late Silurian, but the early evolution of the group is poorly understood. Andreolepis is one of the oldest known osteichthyans, but exclusively documented by detached and fragmentary dermal microremains. A large data-set of Andreolepis scales from the Silurian of Gotland has been used to explore the scale morphology on different parts of the body. Landmark-based geometric morphometrics together with comparative anatomy and functional morphology has allowed 10 morphotypes to be identified and incorporated into a squamation model, in which scales are allocated to anterior-mid lateral flank scales, posterior lateral flank scales, caudal peduncle scales, pectoral peduncle scales, dorsal flank scales, dorsal fulcral scales, caudal fulcral scales, ventral flank scales, medioventral scales and cranial scales. The scale morphology and squamation pattern ofAndreolepis may be primitive for the Osteichthyes and thus informative about the acquisition of the osteichthyan body plan.

  • 3. ENGELBRECHT, Andrea
    et al.
    Mörs, Thomas
    Naturhistoriska riksmuseet, Enheten för paleobiologi.
    REGUERO,, Marcelo
    KRIWET, Jürgen
    A new sawshark, Pristiophorus laevis, from the Eocene of Antarctica with comments on Pristiophorus lanceolatus2016Inngår i: Historical Biology, ISSN 0891-2963, E-ISSN 1029-2381Artikkel i tidsskrift (Fagfellevurdert)
  • 4. ENGELBRECHT, Andrea
    et al.
    Mörs, Thomas
    Naturhistoriska riksmuseet, Enheten för paleobiologi.
    REGUERO,, Marcelo
    KRIWET, Jürgen
    A new sawshark, Pristiophorus laevis, from the Eocene of Antarctica with comments on Pristiophorus lanceolatus2016Inngår i: Historical Biology, ISSN 0891-2963, E-ISSN 1029-2381Artikkel i tidsskrift (Fagfellevurdert)
  • 5. ENGELBRECHT, Andrea
    et al.
    Mörs, Thomas
    Naturhistoriska riksmuseet, Enheten för paleobiologi.
    REGUERO, Marcelo
    KRIWET, Jürgen
    Skates and Rays (Elasmobranchii, Batomorphii) from the Eocene La Meseta and Submeseta formations, Seymour Island, Antarctica2019Inngår i: Historical Biology, ISSN 0891-2963, E-ISSN 1029-2381Artikkel i tidsskrift (Fagfellevurdert)
  • 6.
    Kalthoff, Daniela
    Naturhistoriska riksmuseet, Enheten för zoologi.
    Modular Wear Facet Nomenclature for Mammalian post-canine dentitions2017Inngår i: Historical Biology, ISSN 0891-2963, E-ISSN 1029-2381, Vol. 30, nr 1-2, s. 30-41Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Dental wear facets on the occlusal surface of premolars and molars are traces of their main function, themastication and therefore reflect masticatory movements and also paramasticatory (i.e. non-dietary useof teeth) behavior. Here we present the Modular Wear Facet Nomenclature applicable to most mammaliandentitions. Topographic positions of wear facets in relation to the major cusps and crests of the teeth areused to designate the areas of the occlusal surface the facets occupy (e.g. their mesial, distal, lingual, orbuccal position). Previous published systems for labeling wear facets have been inconsistent with eachother. Therefore, we provide a synoptic review of the most widely-used terminologies, and introducethe alternative Modular Wear Facet Nomenclature. This nomenclature aims to overcome the difficultiescaused by the existing inconsistent wear facet terminologies. Our new approach is applicable to dentitionswhere the occlusal morphology does not change significantly for most of the lifetime of the animal. Inthose dentitions, the primary occlusal surfaces are not significantly modified as wear facets become moreextensive with wearing. This appears to be a common pattern in pre-tribosphenic, tribosphenic molars,and the teeth derived from tribosphenic precursors (e.g. bunodont molar morphologies). In teeth wherethe secondary occlusal surface is functionally intensely modified (i.e. high-crowned and evergrowingteeth with large areas of dentine exposed) any facet labeling system appears to be challenging, since theidentification of individual facets is blurred and their spatial position may be indeterminable.

  • 7.
    Kundrát, Martin
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för organismbiologi, Evolution och utvecklingsbiologi. Univ Pavol Jozef Safarik, Ctr Interdisciplinary Biosci Technol & Innovat Pk, Kosice, Slovakia.
    Nudds, John
    Univ Manchester, Sch Earth & Environm Sci, Manchester, Lancs, England.
    Kear, Benjamin P.
    Uppsala universitet, Enheten för musik och museer, Evolutionsmuseet.
    Lu, Junchang
    Chinese Acad Geol Sci, Key Lab Stratig & Paleontol, Inst Geol, Minist Land Resources, Beijing, Peoples R China.
    Ahlberg, Per
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för organismbiologi, Evolution och utvecklingsbiologi.
    The first specimen of Archaeopteryx from the Upper Jurassic Mornsheim Formation of Germany2019Inngår i: Historical Biology, ISSN 0891-2963, E-ISSN 1029-2381, Vol. 31, nr 1, s. 3-63Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    From an initial isolated position as the oldest evolutionary prototype of a bird, Archaeopteryx has, as a result of recent fossil discoveries, become embedded in a rich phylogenetic context of both more and less crownward stem-group birds. This has prompted debate over whether Archaeopteryx is simply a convergently bird-like non-avialan theropod. Here we show, using the first synchrotron microtomographic examination of the genus, that the eighth or Daiting specimen of Archaeopteryx possesses a character suite that robustly constrains it as a basal avialan (primitive bird). The specimen, which comes from the Mornsheim Formation and is thus younger than the other specimens from the underlying Solnhofen Formation, is distinctive enough to merit designation as a new species, Archaeopteryx albersdoerferi sp. nov., but is recovered in close phylogenetic proximity to Archaeopteryx lithographica. Skeletal innovations of the Daiting specimen, such as fusion and pneumatization of the cranial bones, well vascularized pectoral girdle and wing elements, and a reinforced configuration of carpals and metacarpals, suggest that it may have had more characters seen in flying birds than the older Archaeopteryx lithographica. These innovations appear to be convergent on those of more crownward avialans, suggesting that Bavarian archaeopterygids independently acquired increasingly bird-like traits over time. Such mosaic evolution and iterative exploration of adaptive space may be typical for major functional transitions like the origin of flight.

  • 8.
    Mörs, Thomas
    et al.
    Naturhistoriska riksmuseet, Enheten för paleobiologi.
    FLINK, Therese
    Large apeomyine rodents (Mammalia, Eomyidae) from the early Miocene of Echzell, Germany2018Inngår i: Historical Biology, ISSN 0891-2963, E-ISSN 1029-2381Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The dental material described in this paper was collected from fossiliferous ash layers of the Vogelsberg volcanic complex at Echzell, Germany. It consists of 32 teeth of a new large Apeomys species, Apeomys oldrichi n. sp., and 19 teeth of Megapeomys lindsayi Fejfar, Rummel and Tomida. Both species are extremely rare faunal elements in the early Miocene of Europe. Apeomys oldrichi n. sp. is the largest known Apeomys species, and occurs in a number of MN 3 – 4 sites in southern Germany and Czech Republic. Megapeomys lindsayi, the largest Eurasian apeomyine, was described on the basis of a single lower premolar. Herein both lower and upper cheek teeth as well as the lower deciduous premolar are described for the first time. In comparison with related populations from other localities, the evolutionary stage of the two apeomyine species clearly indicates a middle Orleanian age (MN 4) for Echzell which concurs with previous studies.

  • 9.
    Niedzwiedzki, Grzegorz
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för organismbiologi, Evolution och utvecklingsbiologi.
    Sennikov, Andrey
    Russian Acad Sci, Borissiak Paleontol Inst, Profsoyuznaya 123, Moscow 117997, Russia.;Kazan Fed Univ, Kremlyovskaya 18, Kazan 420008, Russia..
    Brusatte, Stephen L.
    Univ Edinburgh, Sch GeoSci, Grant Inst, Kings Bld, Edinburgh EH9 3JW, Midlothian, Scotland..
    The osteology and systematic position of Dongusuchus efremovi Sennikov, 1988 from the Anisian (Middle Triassic) of Russia2016Inngår i: Historical Biology, ISSN 0891-2963, E-ISSN 1029-2381, Vol. 28, nr 4, s. 550-570Artikkel, forskningsoversikt (Fagfellevurdert)
    Abstract [en]

    European Russia has yielded several fragmentary but potentially important archosauriform specimens from the Middle Triassic, but these have been only briefly described in the literature. One of these puzzling taxa is Dongusuchus efremovi Sennikov, 1988, described from the Donguz Svita. We present a redescription of Dongusuchus efremovi, which includes the first photographic atlas and thorough anatomical description of the holotype and referred specimens. This taxon is shown to be a gracile, probably fast-running species with elongate and slender limbs. A phylogenetic analysis recovers Dongusuchus efremovi as an early-diverging, non-archosaurian archosauriform. Previous work had suggested that this taxon was a rauisuchid'. The gracile proportions of the femur and somewhat wedge-shaped head, however, are unusual for basal archosauriforms and are similar to the plesiomorphic state in crocodile and avian-line crown archosaurs. Several Early-Middle Triassic basal archosauriforms and early members of the crocodile and avian lineages were gracile with elongate, slender limbs. This suggests that the limb morphology of Dongusuchus efremovi may be plesiomorphic for Archosauria and proximal clades.

  • 10.
    Piechowski, Rafal
    et al.
    Polish Acad Sci, Inst Paleobiol, Warsaw, Poland;Univ Warsaw, Dept Palaeobiol & Evolut, Biol & Chem Res Ctr, Fac Biol, Warsaw, Poland.
    Niedzwiedzki, Grzegorz
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för organismbiologi, Evolution och utvecklingsbiologi.
    Talanda, Mateusz
    Univ Warsaw, Dept Palaeobiol & Evolut, Biol & Chem Res Ctr, Fac Biol, Warsaw, Poland.
    Unexpected bird-like features and high intraspecific variation in the braincase of the Triassic relative of dinosaurs2019Inngår i: Historical Biology, ISSN 0891-2963, E-ISSN 1029-2381, Vol. 31, nr 8, s. 1065-1081Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Silesaurus opolensis Dzik, 2003 from the Late Triassic (late Carnian) of Poland is a key taxon for understanding the evolution of early dinosaurs. High intraspecific variation observed in the S. opolensis braincase brings caution in taxonomic and diversity studies of early dinosauromorphs. The external and internal osteology of three almost complete braincases of S. opolensis show that this taxon shares several similarities with other early dinosauriforms, which supports a close relationship among these forms. However, the paroccipital processes of S. opolensis are directed ventrally like in birds, reaching the level of the ventral margin of the basioccipital condyle. In dinosauromorphs, these processes usually have an almost horizontal orientation (presumed to be the plesiomorphic condition). Modifications observed in birds and S. opolensis have resulted in the dorsoventral expansion of M. complexus and M. depressor mandibulae, which occupy the dorsolateral part of the posterior side of the skull. In adult birds, these muscles act strongly on the initial upstroke of the head during drinking. Therefore, the inferred condition of these muscles in S. opolensis may imply that Silesauridae evolved toward bird-like feeding behaviour.

  • 11.
    Skawinski, Tomasz
    et al.
    Univ Wroclaw, Dept Evolutionary Biol & Conservat Vertebrates, Fac Biol Sci, Wroclaw, Poland..
    Ziegler, Maciej
    Glogowska 227c, PL-60111 Poznan, Poland..
    Czepinski, Lukasz
    Univ Warsaw, Dept Palaeobiol & Evolut, Fac Biol, Biol & Chem Res Ctr, Warsaw, Poland..
    Szermanski, Marcin
    Siemiradzkiego 19-23, PL-43300 Bielsko Biala, Poland..
    Talanda, Mateusz
    Univ Warsaw, Dept Palaeobiol & Evolut, Fac Biol, Biol & Chem Res Ctr, Warsaw, Poland..
    Surmik, Dawid
    Univ Silesia, Fac Earth Sci, Sosnowiec, Poland..
    Niedzwiedzki, Grzegorz
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för organismbiologi, Evolution och utvecklingsbiologi.
    A re-evaluation of the historical "dinosaur' remains from the Middle-Upper Triassic of Poland2017Inngår i: Historical Biology, ISSN 0891-2963, E-ISSN 1029-2381, Vol. 29, nr 4, s. 442-472Artikkel, forskningsoversikt (Fagfellevurdert)
    Abstract [en]

    The so-called historical Polish discoveries of Triassic dinosaurs' have been repeatedly cited in papers and popular science books. Here, we re-evaluate each historical and purported Triassic dinosaur find from Poland. Additionaly, we describe several supposed dinosaur' bones collected by Polish geologists but only briefly mentioned: in regional geological journals, on collection labels, or in field notes. We attempt to assign all investigated specimens to the least inclusive taxon possible. Our revision indicates that part of this material represents non-dinosaur archosauromorph taxa. Most of the analysed specimens are fragmentary bones or isolated teeth and are indistinguishable from skeletal elements described from other well-known Triassic archosauromorph taxa. We conclude that fossils of dinosauriforms are present in the Upper Triassic of Silesia and Holy Cross Mountains. New analysis of Velocipes guerichi von Huene, 1932 holotype specimen from Kocury shows that it is the proximal part of fibula of a medium-sized theropod (or even neotheropod). Formally undescribed part of dinosauriform limb bone from the Holy Cross Mountains and V. guerichi from Silesia are the only identifiable dinosauromorph skeletal remains recognised in the Polish Triassic discovered prior to the description of Silesaurus opolensis Dzik, 2003 from the Upper Carnian of Krasiejow.

  • 12.
    Zigaite, Zivile
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för organismbiologi, Evolution och utvecklingsbiologi.
    Richter, Martha
    Natural History Museum.
    Karatajute-Talimaa, Valentina
    Vilnius University.
    Meredith Smith, Moya
    King's College London, Dental Institute.
    Tissue diversity and evolutionary trends of the dermal skeleton of Silurian thelodonts2013Inngår i: Historical Biology, ISSN 0891-2963, E-ISSN 1029-2381, Vol. 25, nr 2, s. 143-154Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Previously described scale morphotypes of Silurian thelodonts, constrained by their representation as isolated dermaldenticles are reassessed to provide a more robust character basis for their inclusion in future phylogenetic studies. Asrelatively common microfossils, thelodonts are important biostratigraphical markers, but their interrelationships withgeologically younger species known by complete skeletons are still unresolved. We examined scales of 21 knownmorphotypes from north-eastern Europe, Siberia and central Asia and described their distinct tissue arrangementsconsidering (1) thickness and direction of dentine tubules, (2) presence or absence of a pulp canal, (3) number and positionof pulp canals, (4) the presence or absence of a distinct outer crown layer and (5) the extent of Sharpey’s fibres penetratingthe scale base. We correlated the traditional thelodont scale type morphologies with these distinct scale histologies, as foundin Silurian thelodonts. In addition, a new histological type for thelodont scales, the Talimaalepis type, is described torepresent a new taxon, from the Early-Mid Silurian. Our study suggests that, through time, there is a general trend ofincreasing complexity in thelodont dermal tissue structures. Three types of dentine and internal scale organisations weredistinguished in Silurian species studied, namely (1) irregular, thin tubular dentine; (2) irregular, thick tubular dentine, withtwo subtypes as a function of pulp canal development and (3) regular, tubular dentine (orthodentine).

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