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    Tytuł:
    Alleged cnidarian Sphenothallus in the Late Ordovician of Baltica, its mineral composition and microstructure
    Autorzy:
    Vinn, O.
    Kirsimae, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/21175.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    alleged cnidarian
    cnidarian
    Sphenothallus
    Late Ordovician
    Ordovician
    Sandbian
    Katian
    mineral composition
    microstructure
    Estonia
    Opis:
    Sphenothallus is a problematic fossil with possible cnidarian affinities. Two species of Sphenothallus, S. aff. longissimus and S. kukersianus, occur in the normal marine sediments of the Late Ordovician of Estonia. S. longissimus is more common than S. kukersianus and has a range from early Sandbian to middle Katian. Sphenothallus had a wide paleo-biogeographic distribution in the Late Ordovician. The tubes of Sphenothallus are composed of lamellae with a homogeneous microstructure. The homogeneous microstructure could represent a diagenetic fabric, based on the similarity to diagenetic structures in Torellella (Cnidaria?, Hyolithelminthes). Tubes of Sphenothallus have an apatitic composition, but one tube contains lamellae of diagenetic calcite within the apatitic structure. Sphenothallus presumably had originally biomineralized apatitic tubes. Different lattice parameters of the apatite indicate that biomineralization systems of phosphatic cnidarians Sphenothallus and Conularia sp. may have been different.
    Źródło:
    Acta Palaeontologica Polonica; 2015, 60, 4
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Epi- and endobionts on the late Silurian (early Pridoli) stromatoporoids from Saaremaa Island, Estonia
    Autorzy:
    Vinn, O.
    Wilson, M. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/191798.pdf
    Data publikacji:
    2012
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    encrustation
    sclerobionts
    stromatoporoids
    symbiosis
    bioerosion
    Pridoli
    Baltica
    Opis:
    A diverse sclerobiont community is described from the Kaugatuma Formation (lower Pridoli) of Saare- maa, Estonia. The stromatoporoid substrates studied here vary from low-domical to high-domical shapes. The community is numerically dominated by microconchids, which may have been characteristic of the sclerobiont fauna in the Pridoli of Baltica. Palaeoconchus aff. tenuis, Anticalyptraea calyptrata, Aulopora sp., sheet-like bryozoans, branching bryozoans, erect bryozoan holdfasts, rugosans, favositids, discoidal crinoid holdfasts, star- like crinoid holdfasts and sheet-like stromatoporoids encrust the domical stromatoporoids. Endobionts are repre- sented by embedded, symbiotic rugosans, Aulopora sp., and two rare borings Trypanites.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2012, 82, 3; 195-200
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Microconchid tubeworms from the Jurassic of England and France
    Autorzy:
    Vinn, O
    Taylor, P.D.
    Powiązania:
    https://bibliotekanauki.pl/articles/21019.pdf
    Data publikacji:
    2007
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    ecology
    microconchid tubeworm
    Spirorbis midfordensis
    Punctaconchus ampliporus
    England
    tubeworm
    morphology
    France
    Microconchida
    Jurassic
    paleontology
    Opis:
    The Bajocian tubeworm Spirorbis midfordensis, previously regarded as a spirorbid polychaete, is reinterpreted as a microconchid and assigned to Punctaconchus gen. nov. along with two new species, Punctaconchus ampliporus sp. nov. (Toarcian?, Aalenian–Bathonian), the type species of the new genus, and Punctaconchus palmeri sp. nov. (Bathonian). Microconchids are a mostly Palaeozoic group of tubeworms that are probably more closely related to modern lophophorate phyla than they are to polychaetes. Punctaconchus, the youngest unequivocal microconchid, is characterised by having large pores (punctae) penetrating the tube wall, which has a fibrous or platy lamellar microstructure, and ripplemark−like transverse ridges on the tube interior. In both morphology and ecology it is a remarkable homeomorph of the polychaete Spirorbis.
    Źródło:
    Acta Palaeontologica Polonica; 2007, 52, 2
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Crinoids from the Silurian of Western Estonia
    Autorzy:
    Ausich, W.I.
    Wilson, M.A.
    Vinn, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/21031.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    crinoid
    Silurian
    Western Estonia
    Estonia
    Echinodermata
    Crinoidea
    Pridoli
    paleontology
    new species
    Calceocrinus balticensis
    Desmidocrinus laevigatus Eucalyptocrinites tumidus
    Saaremaacrinus estoniensis
    Opis:
    The Silurian crinoids of Estonia are re−evaluated based on new collections and museum holdings. Nineteen species−level crinoid taxa are now recognized. All crinoid names applied to Estonian Silurian crinoids during the middle 19th century are disregarded. Especially significant is the fauna reported herein from the Pridoli because coeval crinoids are very poorly known from the Baltic region and elsewhere. One new genus and four new species are described from Estonia, namely Calceocrinus balticensis sp. nov., Desmidocrinus laevigatus sp. nov., Eucalyptocrinites tumidus sp. nov., and Saaremaacrinus estoniensis gen. et sp. nov.
    Źródło:
    Acta Palaeontologica Polonica; 2012, 57, 3
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A new microconchid tubeworm from the Artinskian (Lower Permian) of central Texas, USA
    Autorzy:
    Wilson, M.A.
    Vinn, O.
    Yancer, T.E.
    Powiązania:
    https://bibliotekanauki.pl/articles/20377.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Opis:
    Calcareous tubeworms are common in the Artinskian (Lower Permian) shale and limestone rocks of the Wichita−Albany Group in central Texas. In some units they form small reefs of budding tubes spreading outward from a common origin. These tubular fossils have been traditionally referred to as serpulids, but here we identify them as microconchids (Helicoconchus elongatus gen. et sp. nov.) These microconchids are unusual because of their greatly elongated impunctate tubes with centrally pitted diaphragms. They also show two types of budding: lateral with small daughter tubes that begin as small coils, and binary fission that produced two daughter tubes of equal diameters. These microconchids flourished in shallow marine environments with a fauna dominated by mollusks, echinoids, and foraminifera.
    Źródło:
    Acta Palaeontologica Polonica; 2011, 56, 4
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cryptic encrusting fauna inside invertebrate fossils from the Ordovician of Estonia
    Autorzy:
    Vinn, O.
    Ernst, A.
    Toom, U.
    Isakar, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/191331.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    encrustation
    bryozoans
    trilobites
    cornulitids
    cryptic fauna
    Ordovician
    Baltica
    Opis:
    This is the first report of encrusted cryptic surfaces in the Ordovician of Estonia. Only bryozoans and cornulitids occurred in nautiloids and trilobites. Bryozoans were the dominant encrusters, in terms of both the number of specimens and the encrustation area. Stalked echinoderms are common on the hardgrounds in the Middle and Upper Ordovician of Baltica, but the restricted space in nautiloid living chambers and trilobites probably prevented colonization by stalked echinoderms. Cryptic surfaces in nautiloids and trilobites usually are somewhat more encrusted than the open surfaces of hardgrounds in the Ordovician of Estonia. Encrusters presumably favoured cryptic surfaces, as these were less accessible for predators and grazers. Low encrustation densities, compared to North American hard substrates, seem to be characteristic for the Ordovician Baltic Basin.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2018, 88, 3; 285-290
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Middle and Late Jurassic tube-dwelling polychaetes from the Polish Basin: diversity, palaeoecology and comparisons with other assemblages
    Autorzy:
    Słowiński, J.
    Vinn, O.
    Jäger, M.
    Zatoń, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/31341366.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    paleontology
    Sabellidae
    Serpulidae
    taxonomy
    tubeworm
    Mesozoic
    Polska
    Middle Jurassic
    Late Jurassic
    tube-dwelling polychaete
    diversity
    paleoecology
    Źródło:
    Acta Palaeontologica Polonica; 2022, 67, 4; 827-864
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Paleoecology of the first Devonian-like sclerobiont association on Permian brachiopods from southeastern Mexico
    Autorzy:
    Torres-Martinez, M.A.
    Vinn, O.
    Martin-Aguilar, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/2082300.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Brachiopoda
    Bryozoa
    Hederelloidea
    Microconchida
    Permian
    Roadian
    Mexico
    Chiapas
    Opis:
    This paper describes a sclerobiont association from the Paso Hondo Formation (Roadian, middle Permian), Chiapas, Mexico. Different marine invertebrates such as hederelloids, microconchids, bryozoans, and crinoids (represented by holdfasts) encrusted brachiopod shells belonging to Athyridida and Rhynchonellida. This association is similar to those recorded in different Devonian localities, especially by the co-occurrence of microconchids, hederelloids, and bryozoans. Paleoecological analysis revealed that bryozoans were the most abundant sclerobionts, whereas crinoid holdfasts were uncommon. Likewise, hederelloids and microconchids often settled on hosts previously colonized by bryozoans. Most microconchids encrusted rhynchonellid shells. A positive correlation between the size of the hosts and abundance/diversity of sclerobionts was recorded. The distribution analysis suggests that sclerobiont colonization could have been influenced either by inhalant currents of brachiopods, time of exposure, position of hosts, or by combination of all these factors. Moreover, most of commissures and foramens of brachiopods were not covered by epibionts, suggesting that there was a live interaction. Thus, studied brachiopods were likely encrusted syn vivo, and the interaction between sclerobionts and their brachiopod hosts was likely commensal since there is no damage to the brachiopod valves in the form of malformations or borings. On the contrary, the epibiont cover might have served as a natural shield against predators and parasites. The Roadian age of the association is based on the stratigraphic distribution of host brachiopods. The studied association inhabited open waters on a homoclinal carbonate ramp in the Chicomuselo region. Although encrusted brachiopods belong to the biotic Grandian Province, similar sclerobiont communities have not been previously recorded from the Permian of North America or beyond. The described community represents the youngest record of co-occurring microconchids, hederelloids, and bryozoans, as all previously known similar communities originate from the Late Devonian.
    Źródło:
    Acta Palaeontologica Polonica; 2021, 66, 1; 131-141
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sclerobionts on organic substrates from the Late Paleocene Chehel-Kaman Formation, Kopet-Dagh Basin, NE Iran
    Autorzy:
    Salahi, A.
    El Hedeny, M.
    Vinn, O.
    Rashwan, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/973717.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    sclerobionts
    Late Paleocene
    Chehel-Kaman Formation
    Iran
    Opis:
    Molluscs (oysters and gastropods) of the Late Paleocene Chehel-Kaman Formation, Kopet-Dagh Basin NE Iran were significantly colonized by sclerobionts. The largest area of the shells studied is covered by various borings. The diversity of macro-bioeroding ichnotaxa is rather high, including Gastrochaenolites Leymerie 1842; Maeandropolydora Voigt, 1965; Trypanites Mägdefrau, 1932; Talpina von Hagenow, 1840, and possibly Entobia Bronn, 1837. Some slightly conical borings penetrating the shells could belong to predatory tracemakers of Oichnus Bromley, 1981. Encrusters include calcareous polychaetes, cyclostome and cheilostome bryozoans, foraminifera and oysters. Calcareous sabellids [i.e. Glomerula serpentina (Goldfuss, 1831)] and serpulids are equally common sclerobionts in the association. Bryozoans cover a slightly larger area of the substrate than the calcareous polychaetes, while encrusting oysters are subordinate. The majority of fossils in the hard-substrate community studied belong to suspension feeders. Sclerobionts are typical of the shallow-marine environment, commonly in warm water. The present study is the first attempt to record the occurrence and diversity of epi- and endobionts in the organic substrates, present in the topmost part of the Late Paleocene Chehel-Kaman Formation, Kopet-Dagh Basin, NE Iran.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2018, 88, 3; 291-301
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A probable oligochaete from an Early Triassic Lagerstatte of the southern Cis-Urals and its evolutionary implications
    Autorzy:
    Shcherbakov, D.E.
    Timm, T.
    Tzetlin, A.B.
    Vinn, O.
    Zhuravlev, A.Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/2082181.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Annelida
    Clitellata
    Oligochaeta
    Mesozoic
    Lagerstätte
    Russia
    Opis:
    Oligochaetes, despite their important role in terrestrial ecosystems and a tremendous biomass, are extremely rare fossils. The palaeontological record of these worms is restricted to some cocoons, presumable trace fossils and a few body fossils the most convincing of which are discovered in Mesozoic and Cenozoic strata. The Olenekian (Lower Triassic) siliciclastic lacustrine Petropavlovka Lagerstätte of the southern Cis-Urals yields a number of extraordinary freshwater fossils including an annelid. The segmented body with a secondary annulation of this fossil, a subtriangular prostomium, a relatively thick layered body wall and, possibly, the presence of a genital region point to its oligochaete affinities. Other fossil worms which have been ascribed to clitellates are reviewed and, with a tentative exception of two Pennsylvanian finds, affinities of any pre-Mesozoic forms to clitellate annelids are rejected. The new fossil worm allows tracing of a persuasive oligochaete record to the lowermost Mesozoic and confirms a plausibility of the origin of this annelid group in freshwater conditions.
    Źródło:
    Acta Palaeontologica Polonica; 2020, 65, 2; 219-233
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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