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Tytuł:
Revision of Hamites wernickei Wollemann, 1902 (Cephalopoda, Ancyloceratina) from the classic Lüneburg section (Upper Cretaceous, northern Germany)
Autorzy:
Niebuhr, B.
Jagt, J. W. M.
Powiązania:
https://bibliotekanauki.pl/articles/139004.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
campanian
ammonites
Nostoceras
Oxybeloceras
taxonomy
Europe
kampan
amonity
systematyka
Europa
Opis:
A re-examination of heteromorph ammonites of late Campanian age from the Zeltberg section at Lüneburg has demonstrated that the type series of Hamites wernickei in fact comprises two different species that are here assigned to the nostoceratid Nostoceras Hyatt, 1894 and the polyptychoceratid Oxybeloceras Hyatt, 1900. Nostoceras (Didymoceras) wernickei (Wollemann, 1902) comb. nov., to which three of the four specimens that were described and illustrated by Wollemann (1902) belong, has irregularities of ribbing and tuberculation and changes its direction of growth at the transition from the helicoidal whorls to the hook, which is a typical feature of members of the subfamily Nostoceratinae. Torsion of body chambers is not developed in hairpin-shaped ammonite species, which means that the species name wernickei is no longer available for such polyptychoceratine diplomoceratids. Consequently, the fourth specimen figured and assigned to Hamites wernickei by Wollemann (1902) is here transferred to Oxybeloceras and considered conspecific to material from the Hannover area (Lehrte West Syncline) as O. aff. crassum (Whitfield, 1877). In addition to the "Heteroceras-Schicht des Mucronaten-Senons" of Lüneburg (bipunctatum /roemeri Zone, upper upper Campanian), the geographic range of N. (D.) wernickei probably includes Upper Austria, Tunisia and the Donbass region, while O. aff. crassum is known from the Hannover area (northern Germany), southern France, northern Spain and Upper Austria.
Źródło:
Acta Geologica Polonica; 2016, 66, 4; 627-644
0001-5709
Pojawia się w:
Acta Geologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new Danian echinoid assemblage from the Greensand in the Kazimierz Dolny area, central Poland: taxonomy, taphonomy and sedimentological implications
Autorzy:
Machalski, M.
Jagt, J. W. M.
Powiązania:
https://bibliotekanauki.pl/articles/138924.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
echinodermata
preservation
ichnology
Arachnostega
planolites
Paleocene
Middle Vistula River section
Central Europe
szkarłupnie
ochrona
ichnologia
paleocen
profil środkowej Wisły
Kazimierz Dolny
Europa Środkowa
Opis:
We describe a new echinoid assemblage, composed of specimens of Bolbaster sp., Cyclaster danicus (Schlüter, 1897), Diplodetus vistulensis (Kongiel, 1950) and Linthia? sp. in a distinctive phosphatic preservation, from the so-called Greensand, a marly glauconitic sandstone horizon at the base of the Danian succession in the Kazimierz Dolny area (central Poland). This assemblage presumably is of early Danian age, with Cyclaster danicus occurring in the lower Danian of Denmark and southern Sweden. The specimens are preserved as internal moulds, composed of phosphatised glauconitic sandstone, occasionally with some test material adhering. The genesis of these moulds involved the following steps: (1) infilling of tests of dead echinoids with glauconitic sand; (2) penetration of the infills by coelobiotic deposit-feeding organisms that produced burrows along the inner test surface; (3) early-diagenetic cementation of infills by calcium phosphate; and (4) exhumation and intraformational reworking of specimens, leading to abrasion, fragmentation and loss of test material in some individuals. Co-occurring are unphosphatised moulds of Echinocorys ex gr. depressa (von Eichwald, 1866) and Pseudogibbaster cf. depressus (Kongiel in Kongiel and Matwiejewówna, 1937), which may represent a younger (middle to late Danian) assemblage. Additionally, the presence of derived late Maastrichtian echinoids, e.g., Temnocidaris (Stereocidaris) ex gr. herthae (Schlüter, 1892), Pleurosalenia bonissenti (Cotteau, 1866) and Hemicara pomeranum Schlüter, 1902, is confirmed for the Greensand, based on new material and re- examination of previously recorded specimens. In summary, members of three echinoid assemblages of different age and preservation occur together in the Greensand. Our results are compatible with former interpretations of this unit as a condensed, transgressive lag with mixed faunas of different age and provenance. However, they are incompatible with the hypothesis that phosphatised Danian fossils preserved in the Greensand are derived from a facies equivalent, now gone, of the lower Danian Cerithium Limestone in eastern Denmark, because all moulds are composed of phosphatised glauconitic sandstone that is utterly different from the calcareous dinocyst-dominated, fine crystalline matrix of the Cerithium Limestone.
Źródło:
Acta Geologica Polonica; 2018, 68, 4; 571-596
0001-5709
Pojawia się w:
Acta Geologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Maastrichtian Ceratisepia and Mesozoic cuttlebone homeomorphs
Mastrychcka Ceratisepia oraz mezozoiczne homeomorfy
Autorzy:
Hewitt, R A
Jagt, J W M
Powiązania:
https://bibliotekanauki.pl/articles/21399.pdf
Data publikacji:
1999
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
fauna kopalna
mezozoik
Spirulida
Loligosepia
Ceratisepia vanknippenbergi
Actinosepia
Trachyteuthis
Octobrachia
muszle
Sepiida
homeomorfy
taksony
paleontologia
mikrostruktura
szkielet
muszle embrionalne
Pearceiteuthis
matwy
Opis:
The phylogenetics of potential Mesozoic ancestors of cuttlefish of a restricted order Sepiida von Zittel, 1895 (superorder Decabrachia Boettger, 1952) is reviewed. Microstructural studies of Mesozoic homeomorphs of cuttlebones (Pearceiteuthis gen. n., Loligosepia, Trachyteuthis, Actinosepia) are consistent with their assignement to the superorder Octobrachia Fioroni, 1981. The discovery of an embryonic Ceratisepia shell in the upper Maastrichtian of the Netherlands, indicates that true Sepiida did have a pre-Cenozoic origin. Cretaceous decabrachs of the order Spirulida Stolley, 1919 do not show evidence of the dorso-anterior shell growth vectors seen in Cenozoic spirulids, sepiids and octobrachs. Separate origins of the Sepiida and Spirulida within Cretaceous diplobelinid belemnites is still the most attractive hypothesis. Ceratisepia vanknippenbergi sp. n. from the upper Maastrichtian of the Netherlands and Pearceiteuthis buyi gen. et sp. n. from the Callovian of England are described.
Dokonano przeglądu potencjalnych mezozoicznych przodków mątw (rzqd Sepiida von Zittel, 1859 sensu stricto; nadrząd Decabrachia Boettger, 1952). Wyniki badań mikrostruktur szkieletów mezozoicznych homeomorfów mątw (Pearceiteuthis gen. n., Loligosepia, Trachyteuthis, Actinosepia) potwierdzają ich przynalezność do nadrzędu Octobrachia Fioroni, 1981. Znalezisko embrionalnej muszli Ceratisepia w osadach górnego mastrychtu Holandii wskazuje, że Sepiida powstały przez kenozoikiem. Kredowe dziesięciornice z rzędu Spirulida Stolley, 1919 nie wykazują grzbietowo-przednich wektorów wzrostu muszli, które można obserwować u kenozoicznych spirul, mątw oraz ośmiornic. Hipoteza głosząca, ze Sepiida oraz Spirulida wyodrębniły się niezależnie z kredowych diplobelinidowych belemnitów jest wciąż najbardziej atrakcyjnym wyjaśnieniem pochodzenia obu tych grup. Opisano dwa nowe taksony: Ceratisepia vanknippenbergi sp. n. z górnego mastrychtu Holandii oraz Pearceiteuthis buyi gen. et sp. n. z keloweju Anglii.
Źródło:
Acta Palaeontologica Polonica; 1999, 44, 3; 305-326
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thirty odd years after Alvarez’s discovery: Faunal evolution and principal bio-events of the Cretaceous Period - recent progress and future directions
Autorzy:
Jagt-Yazykova, E.A.
Jagt, J.W.M.
Powiązania:
https://bibliotekanauki.pl/articles/21601.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Alvarez’s discovery
fauna evolution
Cretaceous
progress
future direction
paleontology
Źródło:
Acta Palaeontologica Polonica; 2012, 57, 4
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The stratigraphically earliest record of Diplomoceras cylindraceum (heteromorph ammonite) : implications for Campanian/Maastrichtian boundary definition
Autorzy:
Remin, Z.
Machalski, M.
Jagt, J. W. M.
Powiązania:
https://bibliotekanauki.pl/articles/2059993.pdf
Data publikacji:
2015
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
diplomoceratidae
Late Cretaceous
diachroneity
stratigraphy
Polska
Opis:
A fragmentary specimen of the diplomoceratid heteromorph Diplomoceras cylindraceum, one of three ammonite markers used for the definition of the base of the Maastrichtian Stage, is recorded from the middle Campanian of the Roztocze Hills, southeast Poland. The new find, well constrained by associated ammonites and inoceramid bivalves, represents the earliest well-dated occurrence of this species worldwide to date. Therefore, the first occurrence (FO) of D. cylindraceum is conspicuously below the traditional base of the Maastrichtian as defined by the FO of the belemnite Belemnella lanceolata. Indeed, this is also far below the boundary designated in the Global Stratotype Section at Tercis les Bains (Landes, France). A comparison of the FOs of D. cylindraceum in sections acrossEurope clearly shows a significant diachroneity, which diminishes its value for definition of the Campanian/Maastrichtian boundary.
Źródło:
Geological Quarterly; 2015, 59, 4; 843--848
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Late Cretaceous gastropod egg capsules from the Netherlands preserved by bioimmuration
Autorzy:
Zaton, M.
Taylor, P.D.
Jagt, J.W.M.
Powiązania:
https://bibliotekanauki.pl/articles/21441.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Late Cretaceous
gastropod
egg capsule
Netherlands,The
bioimmuration
Cretaceous
paleontology
Opis:
Clusters of gastropod egg capsules, inferred to be of neritoids and attached to the inner shell wall of the ultimate whorl of a large volutid gastropod, are here recorded from the upper Nekum Member (Maastricht Formation; late Maastrichtian) of the ENCI−Heidelberg Cement Group quarry, St Pietersberg (Maastricht, southeast Netherlands). Because the aragonitic shell of the volutid has dissolved, the outlines of the egg capsules are now revealed on the steinkern of indurated biocalcarenite, having been subsequently overgrown by cheilostome bryozoan colonies and preserved as mould bioimmurations. This represents the first example of gastropod eggs preserved through bioimmuration, as well as the first record of gastropod eggs from the Cretaceous.
Źródło:
Acta Palaeontologica Polonica; 2013, 58, 2
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Late Cretaceous anomurans and brachyurans from the Maastrichtian type area
Autorzy:
Collins, J S H
Fraaye, R H B
Jagt, J W M
Powiązania:
https://bibliotekanauki.pl/articles/19953.pdf
Data publikacji:
1995
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
rak pustelnik
kraby
Holandia
mastrycht holendersko-belgijski
paleontologia
Paragalathea
Belgia
Opis:
From the late Maastrichtian of southern Limburg (The Netherlands) and northeast Belgium, three species of anomurans in as many genera and sixteen brachyuran species in fourteen genera are described. Of the anomurans, Paguristes florae and Eomunidopsis meerssensis, are new; of the brachyurans seven species and one genus are new. These are: Glyptodynomene inornata, Dromiopsis praelaevior, Dromiopsis mosae, Homolopsis declinata, Raninoides? quadrispinosus, Raniliformis occlusa and Binkhorstia euglypha. A new genus, Leptoides, is erected to contain Titanocarcinus briarti (Forir 1887) and a concise historical account of the crabs of the Liège-Limburg Maastrichtian is given.
Publikacja zawiera opisy trzech gatunków raków pustelników i szesnastu krabów ze stratotypowych odsłonięć mastrychtu na pograniczu Holandii i Belgii. Spośród pustelników dwa gatunki są nowe a z krabów siedem gatunków i jeden rodzaj. Zespół krabów zawiera zarówno kosmopolityczne jak i endemiczne gatunki. Najbardziej konserwatywnym ewolucyjnie rodzajem jest Paragalathea, znany od tytonu; połowa rodzajów jest znana również z wczesnej lub środkowej kredy, są to głównie formy kosmopolityczne. Poza raninidami, spośród których przynajmniej niektóre ryły w osadzie, kraby z mastrychtu holendersko-belgijskiego zasiedlały stosunkowo płytkowodne środowiska. Wysokie zróżnicowanie taksonomiczne późnokredowych pustelników i krabów jest wyrazem "morskiej rewolucji mezozoicznej". Liczne ciągi ewolucyjne późnomastrychckich skorupiaków kontynuują się w paleocenie.
Źródło:
Acta Palaeontologica Polonica; 1995, 40, 2; 165-210
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Terminal Maastrichtian ammonites from Turkmenistan, Central Asia
Autorzy:
Machalski, M.
Jagt, J.W.M.
Alekseev, A.S.
Jagt-Yazykova, E.A.
Powiązania:
https://bibliotekanauki.pl/articles/20971.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
paleontology
Maastrichtian
ammonite
Turkmenistan
Central Asia
Ammonoidea
extinction
paleobiogeography
Cretaceous
Paleogene
Opis:
A complete uppermost Maastrichtian–Danian succession in the Sumbar River section, western Kopet Dagh (southwest Turkmenistan, Central Asia), constitutes one of the few instances in the world where the fossil record of the last ammonites can be directly positioned with respect to the iridium−rich, impact−related clay layer, which defines the Cretaceous–Paleogene (K–Pg) boundary. Two ammonite taxa, Baculites cf. vertebralis and Hoploscaphites constrictus johnjagti, range up to a level directly beneath the K–Pg boundary clay in the Sumbar River section. Thus, these two forms probably survived until the very end of the Maastrichtian in the western Kopet Dagh area. The terminal Maastrichtian ammonite records from the Sumbar River area represent the southeasternmost occurrences of these essentially Boreal taxa.
Źródło:
Acta Palaeontologica Polonica; 2012, 57, 4
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dańskie amonity - obecny stan wiedzy i perspektywy badań
Danian ammonites - The present state of knowledge and perspectives for future research
Autorzy:
Machalski, M.
Jagt, J.W.M.
Heinberg, C.
Landman, N.H.
Hakansson, E.
Powiązania:
https://bibliotekanauki.pl/articles/2074714.pdf
Data publikacji:
2009
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
masa wymarła
amonity
odsłonięcia K-Pg
relikt
odrodzenie
uderzenie
anomalia irydowa
Maastricht
Dania
Holandia
New Jersey
ammonites
K-Pg boundary
mass extinctions
survival
recovery
impact
iridium anomaly
Danian
Denmark
Opis:
To date, the strongest arguments for ammonite survival into the Danian (earliest Paleogene) are based on material from the lower Danian Cerithium Limestone at Stevns Klint (Denmark), where ammonites occur above a clay layer with impact products at its base, the latter defining the Cretaceous-Paleogene (K-Pg) boundary. The best-preserved specimen is filled with Danian sediment rather than with Maastrichtian chalk, which would be expected had this been reworked material. Arguments for ammonite survival into the Danian have also been provided by specimens from the sporomorph and calcareous nannoplankton-dated lowermost Danian strata of Meerssen Member unit IVf-7, the Netherlands. Their good preservation indicates that they were not subject to any significant transport or redeposition. However, there are no unequivocal impact-related signatures in unit IVf-7, except for rare shocked quartz grains, recorded from burrows at its base. Sections in the Manasquan Basin, New Jersey, USA, provide equivocal data as far as the problem of ammonite survival into the Danian is concerned. At the top of the Tinton Formation there is a Pinna layer replete with fossils, inclusive of ammonites. Their exquisite preservation and occurrence in monospecific clusters rule out redeposition. The Pinna layer contains exclusively late Maastrichtian microfossils. However, a clear iridium anomaly has been noted at its base. Either the New Jersey ammonites survived the K-Pg event for a short time or the iridium is not in situ due to post-depositional repositioning by percolating water. Planned work is to focus on: 1) a detailed centimetre by centimetre sampling of some Cerithium Limestone basins in Denmark in search of additional ammonite material, 2) palaeontological and taphonomic analysis of ammonites and search for impact signatures in unit IVf-7 in the Netherlands, and 3) geochemical study of the iridium anomaly in New Jersey in order to determine whether its position in respect to the ammonite-bed is original or secondary.
Źródło:
Przegląd Geologiczny; 2009, 57, 6; 486-493
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Campanian and Maastrichtian mosasaurid reptiles from central Poland
Autorzy:
Machalski, M
Jagt, J.W.M.
Dortangs, R.W.
Mulder, E.W.A.
Radwanski, A.
Powiązania:
https://bibliotekanauki.pl/articles/21053.pdf
Data publikacji:
2003
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Reptilia
Polska
Cretaceous
food chain
Platynota
marine lizard
Squamata
mosasaurid reptile
reptile
fossil
Upper Cretaceous
Mosasauridae
lizard
paleontology
Opis:
Isolated marginal teeth and tooth crowns of Late Campanian and Late Maastrichtian mosasaurid reptiles (Squamata, Platynota) from the Wisła River valley area, central Poland, are described and illustrated. These comprise two Late Campanian taxa from Piotrawin quarry: Prognathodon sp. and Plioplatecarpinae sp. A., and four late Late Maastrichtian taxa from Nasiłów quarry: Mosasaurus cf. hoffmanni Mantell, 1829, M. cf. lemonnieri Dollo, 1889c, “Mosasaurus (Leiodon) cfr. anceps” sensu Arambourg (1952), and Plioplatecarpinae sp. B. In addition, the previously described fragmentary jaw with associated teeth of the Late Campanian age from Maruszów quarry (west of the Wisła River area), is reassigned to Mosasaurus cf. hoffmanni. This specimen suggests that M. hoffmanni or a closely related (ancestral?) species already appeared in Europe during the Late Campanian (well−documented European occurrences of M. hoffmanni are Late Maastrichtian in age). At least part of the described mosasaur material is likely to stem from periodic feeding in the area (broken−off or shed tooth crowns) or from floating carcasses (complete teeth and jaw fragments).
Źródło:
Acta Palaeontologica Polonica; 2003, 48, 3
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New lobsters (Decapoda, Nephropoidea) from the Cretaceous-Paleogene section of the Middle Vistula valley, east-central Poland
Autorzy:
Fraaije, R. H. B.
Jagt, J. W. M.
Van Bakel, B. W. M.
Tshudy, D. M.
Powiązania:
https://bibliotekanauki.pl/articles/139191.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
crustaceans
Astacidea
K-Pg boundary
new species
Central Europe
skorupiaki
rakowce
nowe gatunki
Europa Środkowa
Opis:
During fieldwork in the early 1990s at the then still active quarry near Nasiłów, on the left bank of the River Vistula (Wisła), accompanied by Professor Andrzej Radwański, some lobster remains were collected. A fragmentary anterior portion of a decapod crustacean carapace, recovered from a level about 2 m below the Cretaceous–Paleogene (K/Pg) boundary, in a siliceous chalk unit locally referred to as ‘opoka’, constitutes the oldest record of the thaumastocheliform genus Dinochelus Ahyong, Chan and Bouchet, 2010, D. radwanskii sp. nov. The other, more complete, individual is from c. 3 m above the K/Pg boundary, coming from marly gaizes or ‘siwak’; this is ascribed to a new species of Hoploparia M’Coy, 1849, H. nasilowensis sp. nov., the first to be recorded from Danian (lower Paleocene) strata. Although both ‘opoka’ and ‘siwak’ facies in the Nasiłów area are very rich in diverse biota, including some brachyurans, no macruran remains had so far been recorded from the region.
Źródło:
Acta Geologica Polonica; 2018, 68, 4; 503-509
0001-5709
Pojawia się w:
Acta Geologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New Late Jurassic symmetrical hermit crabs from the southern Polish Uplands and early paguroid diversification
Autorzy:
Fraaije, R.H.B.
Krzeminski, W.
Van Bakel, B.W.M.
Krzeminska, E.
Jagt, J.W.M.
Powiązania:
https://bibliotekanauki.pl/articles/945882.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
paleontology
Anomura
Paguroidea
Parapylochelidae
carapace
morphology
evolution
Jurassic
Late Jurassic
hermit crab
crab
Polska
paguroid carapace
Opis:
On the basis of carapaces, three new genera and species of symmetrical paguroid anomurans are described. Diogenicheles theodorae, Masticacheles longirostris, and Pilgrimcheles karolinae constitute the oldest known members of the family Parapylochelidae. As noted previously, assemblages from sponge−reefal strata of Oxfordian (Late Jurassic) age in the southern Polish Uplands document an important radiation event amongst paguroids. Compared to the present day, the Parapylochelidae were more diverse during the mid−Mesozoic; they appear to have withdrawn from shallow, reefal waters to deep−water settings from the Late Jurassic onwards. Paguroid faunas from the Oxfordian of Europe already are highly diverse, both morphologically and phylogenetically, and comprise early members of the families Diogenidae, Pylochelidae, and Parapylochelidae. This suggests that the evolutionary history of paguroids started much earlier (i.e., in pre−Jurassic times) than previously assumed. New terms for several typical paguroid carapace regions are introduced and on the basis of carapace morphology and ecological shifts hypotheses on the early speciation of hermit crabs are put forward.
Źródło:
Acta Palaeontologica Polonica; 2014, 59, 3; 681-688
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The earliest record of a diogenid hermit crab from the Late Jurassic of the southern Polish Uplands, with notes on paguroid carapace terminology
Autorzy:
Fraaije, R.H.B.
Krzeminski, W.
Van Bakel, B.W.M.
Krzeminska, E.
Jagt, J.W.M.
Powiązania:
https://bibliotekanauki.pl/articles/22146.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
diogenid crab
hermit crab
Late Jurassic
Jurassic
Polish upland
paguroid carapace
carapace
terminology
Paguroidea
Diogenidae
carapace morphology
evolution
Oxfordian
Polska
new species
diogenid paguroid
Eopaguropsis nidiaquilae
Opis:
A new species of diogenid paguroid, Eopaguropsis nidiaquilae, the earliest known member of the family to date, is recorded from sponge−reefal strata of Oxfordian (Late Jurassic) age in the southern Polish Uplands. Morphological features of the carapace suggest that the family Diogenidae diverged from other paguroid lineages such as the Pylochelidae and Parapaguridae, long before the Oxfordian Stage (161.2–155.7 Ma). The typically deep, V−shaped cervical groove of diogenids most likely was the product of fusion of the branchiocardiac and cervical grooves of their predecessors.
Źródło:
Acta Palaeontologica Polonica; 2012, 57, 3
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The earliest record of pylochelid hermit crabs from the Late Jurassic of southern Poland, with notes on paguroid carapace terminology
Autorzy:
Fraaije, R.H.B.
Krzeminski, W.
Van Bakel, B.W.M.
Krzemiska, E.
Jagt, J.W.M.
Powiązania:
https://bibliotekanauki.pl/articles/21257.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
pylochelid crab
hermit crab
Ammopylocheles robertboreki Jurapylocheles iwonae
carapace
terminology
fossil
systematics
Late Jurassic
Jurassic
Polska
Paguroidea
Pylochelidae
new species
evolution
Oxfordian
Opis:
Strata with cyanobacterial−sponge buildups of Middle to Late Oxfordian (Late Jurassic) age in the southern Polish Uplands document the earliest known members of the Pylochelidae. Two new Late Jurassic species of “symmetrical” hermit crabs, Ammopylocheles robertboreki and Jurapylocheles iwonae, are described. A new term, the massetic region, is introduced to describe the equivalent in paguroids of the hepatic region in brachyuran carapaces, because in the former, this region does not reflect the position of the liver but rather an attachment zone of the mandibular muscles.
Źródło:
Acta Palaeontologica Polonica; 2012, 57, 3
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
In defence of an iconic ichnogenus : Oichnus Bromley
Autorzy:
Wisshak, M.
Kroh, A.
Bertling, M.
Knaust, D.
Nielsen, J. K.
Jagt, J. W. M.
Neumann, C.
Nielsen, K. S. S.
Powiązania:
https://bibliotekanauki.pl/articles/191852.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
ichnology
ichnotaxonomy
Oichnus
Tremichnus
Sedilichnus
bioerosion
predation
Opis:
By establishing the bioerosion ichnogenus Oichnus, Richard Bromley (1981) addressed ‘small round holes in shells’ and catalysed a series of still ongoing discussions on ichnotaxonomical principles. In a recent revision by Zonneveld and Gingras (2014), Oichnus was rejected, together with Tremichnus Brett, 1985 and Fossichnus Nielsen, Nielsen and Bromley, 2003, by means of subjective synonymisation with the presumed senior synonym Sedilichnus Müller, 1977. However, Sedilichnus is nomenclaturally unavailable, because it is an atelonym (conditionally proposed). In addition, reinvestigation of the type material of ‘Sedilichnus’ shows that it probably describes variably shaped oscula and thus is a genuine morphological character of the host sponge Prokaliapsisjanus, rather than a bioerosion trace fossil. The ichnogenera Oichnus and Tremichnus are re vised, leading to the synonymisation of Balticapunctum Rozhnov, 1989 with Tremichnus, and of Fossichnus with Oichnus. The refined ichnogeneric diagnoses return Oichnus to complete or incomplete bioerosive penetrations in calcareous skeletal substrates, commonly interpreted as praedichnia with or without signs of attachment, while Tremichnus (now including O. excavatus) exclusively refers to shallow pits passing into echinoderm skeletons that are interpreted as domichnia or fixichnia.
Źródło:
Annales Societatis Geologorum Poloniae; 2015, 85, 3; 445-451
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
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