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Oeufs fossiles des cephalopodes?

100%

Kozlowski R.

Acta Palaeontologica Polonica

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1965

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tom 10

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nr 1

L'auteur essaie d'interpréter la nature des énigmatiques vésicules ordoviciennes qu'il a déorites en 1959 sous le nom de Clistrocystis graptolithophilius Kozł. Il constate leur surprenante ressemblance avec les oeufs de la seiche. Cela suggère l'idée qu'il y puisse s'agir des oeufs d'un Céphalopode ordovicien.

2

Les ammonites du niveau vert de Zalas [Oxfordien inferieur, Pologne du Sud]: condensation ou concentration de faunes

75%

Marchand D., Tarkowski R.

Bulletin of the Polish Academy of Sciences. Earth Sciences

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1992

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tom 40

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nr 1

3

Predation on cephalopods by Pygoscelis papua and Arctocephalus gazella at South Orkney Islands

63%

Libertelli M. M., Daneri G. A., Piatkowski U., Coria N. R., Carlini A. R.

Polish Polar Research

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2004

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tom 25

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nr 3-4

267-274

4

Jurassic animals and algae in the flooring of Our Lady of Sorrows Church in Poznan

63%

Antczak M.

Biological Letters

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2015

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tom 52

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nr 1-2

5

Hormonal regulation of cephalopod reproduction in the light of comparative endocrinology of invertebrates

63%

Pokora Z.

Folia Malacologica

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1999

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tom 07

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nr 4

6

Using the giant Australian cuttlefish (Sepia apama) mass breeding aggregation to explore the life cycle of dicyemid parasites

63%

Catalano S. R., Whittington I. D., Donnellan S. C., Gillanders B. M.

Acta Parasitologica

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2013

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tom 58

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nr 4

Dicyemid mesozoan parasites, microscopic organisms found with high intensities in the renal appendages of benthic cephalopods, have a complex, partially unknown life cycle. It is uncertain at which host life cycle stage (i.e. eggs, juvenile, adult) new infection by the dispersive infusoriform embryo occurs. As adult cephalopods have a short lifespan and die shortly after reproducing only once, and juveniles are fast-moving, we hypothesize that the eggs are the life cycle stage where new infection occurs. Eggs are abundant and sessile, allowing a huge number of new individuals to be infected with low energy costs, and they also provide dicyemids with the maximum amount of time for survival compared with infection of juvenile and adult stages. In our study we collected giant Australian cuttlefish (Sepia apama) eggs at different stages of development and filtered seawater samples from the S. apama mass breeding aggregation area in South Australia, Australia, and tested these samples for the presence of dicyemid DNA. We did not recover dicyemid parasite cytochrome c oxidase subunit I (COI) nucleotide sequences from any of the samples, suggesting eggs are not the stage where new infection occurs. To resolve this unknown in the dicyemid life cycle, we believe experimental infection is needed.

7

A new genus of middle Tremadocian orthoceratoids and the Early Ordovician origin of orthoceratoid cephalopods

63%

Kroger B.

Acta Palaeontologica Polonica

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2008

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tom 53

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nr 4

The cephalopods of the subclass Orthoceratoidea, which are termed “orthoceratoids” herein, are a group that remains “the last unexplored wilderness in the Cephalopoda” (Flower 1962: 23). After 45 years this statement still holds true because phylogeny reconstructions are hindered by their morphological simplicity, numerous homeomorphies and iterative evolution. The Orthocerida, straight cephalopods that are characterised by a wide chamber spacing, a thin tubular siphuncle and a small spherical initial chamber, lacking a cicatrix (Kröger 2006) were the ancestors of bactritoids, ammonoids, and coleoids (Engeser 1996). The origin of the Orthocerida is poorly understood. The earliest unequivocal Orthocerida are known from the Floian (Early Ordovician). A number of poorly known possible Orthocerida and/or stem group Orthocerida are known from the Tremadocian. Here, I reassign the long known middle Tremadocian “Orthoceras attavus” to the new genus Slemmestadoceras belonging to a group of worldwide distributed orthoceratoids. The presence of Slemmestadoceras with a thin, probable tubular siphuncle and small initial chambers in the middle Tremadocian suggests that the Orthocerida may have originated already at that time. The comparison of Slemmestadoceras with following late Tremadocian and Floian orthoceratoids demonstrates that a higher level taxon comprising these forms, such as the subclass Orthoceratoidea may constitute a paraphylum.

8

Comment on “Triassic coleoid beaks and other structures from the Calcareous Alps revisited” by Doguzhaeva et al. (2022)

63%

Lukeneder P., Lukeneder A.

Acta Palaeontologica Polonica

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2022

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tom 67

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nr 4

9

A review of the endocerid cephalopod Protocyptendoceras from the Floian [Lower Ordovician] of the Eastern Cordillera, Argentina

63%

Cichowolski M.

Acta Palaeontologica Polonica

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2009

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tom 54

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nr 1

99-109

Ordovician cephalopods from Western Gondwana are still poorly known and published data is in need of systematic and stratigraphical revision. In this work, the endocerid proterocameroceratid Protocyptendoceras from the Floian of the Eastern Cordillera of Argentina is revised using new material from La Ciénaga, 5 km upstream from Purmamarca. The species P. corvalani and P. teicherti are considered to be junior synonyms of P. fuenzalidae, which is redescribed in detail and reillustrated. Specimens preserve adapical parts of isolated siphuncles, related here to the presence of endocones in a posterior portion. Evidently P. fuenzalidae had a nektobenthic mode of life in a shallow water environment, oriented horizontally. Its palaeobiogeographical affinities are mainly with Floian proterocameroceratids from Eastern Gondwana, such as Anthoceras decorum and the related genera Lobendoceras, Ventroloboceras, and Notocycloceras.

10

Catalogue of types of recent cephalopods in the collection of the Natural History Museum, London

63%

Lipinski M. R., Naggs F. A., Roeleveld M. A. C.

Annales Zoologici

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2000

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tom 50

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nr 1

The Natural History Museum [NHM], London, formerly the British Museum (Natural History) [BM(NH)], is a centre of biological systematic collections having worldwide coverage. The small but significant historical collections of Cephalopoda are rich in type material (41 cuttlefish; 51 squid; 73 octopods) and have recently been transformed by the addition of the extensive Discovery collections and the Malcolm Clarke collection of Cephalopoda collected from Sperm Whales, both having come from the Institute of Oceanographic Sciences. A list of the Cephalopoda type collections has not been published for 150 years and shuld he of value to workers on the systematics of the group.

11

Concentrations of Silurian nautiloid cephalopods from Russia and Kazakhstan

63%

Bogolepova O. K., Holland C. H.

Acta Palaeontologica Polonica

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1995

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tom 40

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nr 4

Silurian cephalopod limestones known from northern Asia are usually singular beds or horizons of nodules. They range in their taphonomic character from the Mojero river type, with postmortem concentration from rich living populations by relatively gentle bottom currents into a submarine low, to that of the Karabutak Formation of the South Urals, where there has been concentration by strong wave or current action.

12

Cephalopods (Mollusca: Cephalopoda) in the palaeontological collection of the Faculty of Biology, Adam Mickiewicz University

51%

Konwerski S., Bloszyk J.

Folia Malacologica

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2012

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tom 20

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nr 1

13

Some critical notes on “Comment on ‘Triassic coleoid beaks and other structures from the Calcareous Alps revisited’ by Doguzhaeva et al. (2022)” by Lukeneder and Lukeneder (2022)

51%

Doguzhaeva L. A.

Acta Palaeontologica Polonica

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2022

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tom 67

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nr 4

14

Triassic coleoid beaks and other structures from the Calcareous Alps revisited

51%

Doguzhaeva L. A., Summesberger H., Brandstaetter F., Gruber D., Tintori A.

Acta Palaeontologica Polonica

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2022

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tom 67

|

nr 3

15

Colour patterns in Early Devonian cephalopods from the Barrandian Area: Taphonomy and taxonomy

51%

Turek V.

Acta Palaeontologica Polonica

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2009

|

tom 54

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nr 3

491-502

Five cephalopod specimens from the Lower Devonian of Bohemia (Czech Republic) preserve colour patterns. They include two taxonomically undeterminable orthoceratoids and three oncocerid nautiloids assigned to the genus Ptenoceras. The two fragments of orthocone cephalopods from the lowest Devonian strata (Lochkovian, Monograptus uniformis Zone) display colour patterns unusual in orthoceratoids. They have irregular undulating and zigzag strips that are preserved on counterparts of adapertural regions of specimens flattened in shale, despite their original aragonitic shell having been completely dissolved. These are probably the result of the proteinous pigment inside the shell wall, being substituted during diagenesis by secondary minerals leaving only an altered trace of the original shell. Orthoceratoids from sediments unsuitable for preservation of this feature discussed here thus demonstrate an exceptional case of preservation of colour patterns, not only within Devonian cephalopods but also within other Devonian molluscs. Three specimens of Ptenoceras that preserve colour patterns come from younger Lower Devonian strata. Oblique spiral adaperturally bifurcating bands are preserved in P. alatum from the Pragian and zigzags in P. nudum from the Dalejan. Juvenile specimen of Ptenoceras? sp. from the Pragian exhibits highly undulating transversal bands—a pattern resembling colour markings in some Silurian oncocerids. Dark grey wavy lines observed on the superficially abraded adapical part of a phragmocone of nautiloid Pseudorutoceras bolli and interpreted formerly to be colour markings are here reinterpreted as secondary pigmented growth lines. Other Devonian fossils including a single brachiopod and several gastropods from the Barrandian Area with preserved colour patterns are mentioned. Variety of cephalopod colour patterns, their taxonomic significance, function and significance for palaeoecological interpretation, palaeoenvironmental conditions favouring colour pattern preservation and systematic affiliation of taxa with colour pattern preserved are discussed.

16

Sublethal injuries in Early Devonian cephalopod shells from Morocco

51%

Klug C.

Acta Palaeontologica Polonica

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2007

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tom 52

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nr 4

Internal moulds of the relatively small− to moderate−size shells of Early Devonian ectocochleate cephalopods (typically <150 mm diameter) occasionally display traces of repaired shell damage. Presumably, these animals with their highly specialized buoyancy device, the phragmocone, lived in the water column. It is uncertain as to how the shells of these animals were damaged; one likely cause would be predatory attacks but the identity of the perpetrator remains uncertain. So far, no remains of arthropods capable of breaking or cutting shells have been found in the fossiliferous outcrops of this age in the Anti−Atlas (Morocco). The only macrovertebrate remains of this age are of acanthodian and placoderm fish which probably lived a more or less benthonic life style. Additionally, a fish attack on these cephalopods would probably have destroyed most of the thin−shelled conch and killed the animal. Most of the repaired shell breaks are triangular in shape which is characteristic for cephalopod bite marks. Additionally, the paired arrangement of the fractures in over 70 bactritoids supports the hypothesis that it was a cephalopod attacking another cephalopod. It cannot be excluded with certainty that occasional vertebrate attacks left traces on their shells. Fossil evidence indicates that the development of tightly coiled conchs was a rapid evolutionary event in the Ammonoidea in the Early Devonian; however, the evolution of coiling is probably not directly related to predation pressures because the ratio of injured to healthy specimens is roughly the same in Zlíchovian bactritoids with orthoconic and ammonoids with coiled shells.

17

Antigenic relationships between Aggregata octopiana and A. eberthi two parasites of cephalopods

51%

Rodriguez H., Crespo C., Soto M., Arias C., Iglesias R., Garcia-Estevez M.

Acta Protozoologica

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2003

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tom 42

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nr 3

18

Concentration of juvenile and small cephalopods in the Hirnantian cherts [Late Ordovician] of Porkuni, Estonia

51%

Kroger B.

Acta Palaeontologica Polonica

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2007

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tom 52

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nr 3

The quarry in the north Estonian village of Porkuni provides a succession of shallow−water limestones and cherts spanning the Ashgillian Normalograptus? extraordinarius graptolite Biozone. This interval comprises the initial pulse of the end−Ordovician extinction. The succession of Porkuni contains abundant and extraordinarily well−preserved fossils. 71 cephalopod specimens were extracted from these strata at Porkuni. Many of these specimens are fragments of juvenile shells or small adults. The embryonic shells of the cephalopods are usually preserved and provide insight into their early ontogeny. The faunal composition is considered as autochthonous and reflects a “palaeo−nursery” in a Hirnantian reef environment. The collected specimens represent twelve genera and four orders. Small oncoceridans and orthoceridans dominate the association. The rate of endemism is very high, since only two genera found in Porkuni, are known from outside Baltoscandia. The new genera Parvihebetoceras, Pomerantsoceras, Porkunioceras, and the new species Parvihebetoceras wahli, Pomerantsoceras tibia, Porkunioceras tuba, and Strandoceras orvikui are erected.

19

Soft-tissue attachments in orthocerid and bactritid cephalopods from the Early and Middle Devonian of Germany and Morocco

51%

Kroger B., Klug C., Mapes R.

Acta Palaeontologica Polonica

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2005

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tom 50

|

nr 2

In the Early to Middle Devonian shale sequences of Germany and Morocco, pyritised and secondarily limonitised cephalopod remains are common. Details of the soft−tissue attachment structures are sometimes preserved on the internal moulds of the body chamber and phragmocone of these cephalopods. Some of the studied Orthocerida show a very faint annular elevation and a dorsal furrow. A few Bactritida show a distinctive annular elevation with two circular bands. The bands form a paired or threefold lobe at the dorsum of the shell. Morphological differences between Orthocerida and Bactritida suggest different soft part morphologies. A comparison of the attachment scars shows that the Bactritida are intermediate between the Orthocerida and ammonoids with regard to their muscle attachment scars. The shape of the muscle scars are interpreted as indication for a planktonic lifestyle in Orthocerida and a comparatively active, nektonic lifestyle in Bactritida and ammonoids. The new genus Acanthomichelinoceras is erected. Acanthomichelinoceras commutatum, Cycloceras sp., Bactrites gracile, Bactrites sp. A, Bactrites sp. B, and Bactrites sp. C are described.

20

Connecting ring structure and its significance for classification of the orthoceratid cephalopods

51%

Mutvei H.

Acta Palaeontologica Polonica

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2002

|

tom 47

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nr 1

The connecting ring in orthoceratids is composed of two calcified layers: an outer spherulitic−prismatic and an inner calcified−perforate. The spherulitic−prismatic layer is a direct continuation of that layer in the septal neck, whereas the calcified−perforate layer is a structurally modified continuation of the nacreous layer of the septal neck. The latter layer is traversed by numerous pores which are oriented either transversally to the siphuncular surface, or have a somewhat irregularly anastomosing course. The connecting ring structure is positively correlated to the dorsal position of the scars of the cephalic retractor muscles. A similar type of connecting ring and a dorsal postion of retractor muscle scars also occur in lituitids, previously assigned to tarphyceratids, and in baltoceratids, previously assigned to ellesmeroceratids. These two taxa are therefore included in the suborder Orthoceratina, which, together with the suborder Actinoceratina, are assigned to the order Orthoceratida Kuhn, 1940.

Ograniczanie wyników

Oeufs fossiles des cephalopodes?

Les ammonites du niveau vert de Zalas [Oxfordien inferieur, Pologne du Sud]: condensation ou concentration de faunes

Predation on cephalopods by Pygoscelis papua and Arctocephalus gazella at South Orkney Islands

Jurassic animals and algae in the flooring of Our Lady of Sorrows Church in Poznan

Hormonal regulation of cephalopod reproduction in the light of comparative endocrinology of invertebrates

Using the giant Australian cuttlefish (Sepia apama) mass breeding aggregation to explore the life cycle of dicyemid parasites

A new genus of middle Tremadocian orthoceratoids and the Early Ordovician origin of orthoceratoid cephalopods

Comment on “Triassic coleoid beaks and other structures from the Calcareous Alps revisited” by Doguzhaeva et al. (2022)

A review of the endocerid cephalopod Protocyptendoceras from the Floian [Lower Ordovician] of the Eastern Cordillera, Argentina

Catalogue of types of recent cephalopods in the collection of the Natural History Museum, London

Concentrations of Silurian nautiloid cephalopods from Russia and Kazakhstan

Cephalopods (Mollusca: Cephalopoda) in the palaeontological collection of the Faculty of Biology, Adam Mickiewicz University

Some critical notes on “Comment on ‘Triassic coleoid beaks and other structures from the Calcareous Alps revisited’ by Doguzhaeva et al. (2022)” by Lukeneder and Lukeneder (2022)

Triassic coleoid beaks and other structures from the Calcareous Alps revisited

Colour patterns in Early Devonian cephalopods from the Barrandian Area: Taphonomy and taxonomy

Sublethal injuries in Early Devonian cephalopod shells from Morocco

Antigenic relationships between Aggregata octopiana and A. eberthi two parasites of cephalopods

Concentration of juvenile and small cephalopods in the Hirnantian cherts [Late Ordovician] of Porkuni, Estonia

Soft-tissue attachments in orthocerid and bactritid cephalopods from the Early and Middle Devonian of Germany and Morocco

Connecting ring structure and its significance for classification of the orthoceratid cephalopods