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New observations on Rhabdopleura kozlowskii (Pterobranchia) from the Bathonian of Poland

100%

Kulicki C.

Acta Palaeontologica Polonica

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1971

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tom 16

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nr 4

Specimens of Rh. kozlowskii Kulicki, 1969 have here been described from the Bathonian of southern Poland. A secondary layer, never observed before, has been found inside zooidal tubes.

2

Remarks on the embryogeny and postembryonal development of ammonites

100%

Kulicki C.

Acta Palaeontologica Polonica

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1974

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tom 19

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nr 2

Previous views on the type of embryogeny in ammonites are discussed by the present writer who also points out some morphological characters of the initial chamber, along with the first whorl, which are indicative of a non-larval type of embryogeny. The swelling of shell wall on the nepionic constriction is analyzed in detail and the manner of forming this swelling explained, together with the hypothesis on an adaptative character of the swelling. The diagrams of a relative density of septa in the genus Quenstedtoceras are analyzed and used as a basis for showing certain similarities in the postembryonal development of ammonites and the development of the Recent Decapoda. The occurrence of the morphological hiatus -lack of one whorl- characteristic for the sexual dimorphism of type "A" is explained, on the basis of the Quenstedtoceras, by the difference of one whorl in the ending of the only sexual cycle in males and the first sexual cycle in females.

3

Structure and mode of origin of the ammonite proseptum

100%

Kulicki C.

Acta Palaeontologica Polonica

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1975

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tom 20

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nr 4

Results of studies of the structure and the relation of proseptum to the shell walls are presented. Proseptum develops in a deepening furrow extending around the posterior body part, simultaneously with the internal prismatic lamina of the initial chamber and the first whorl. Prosiphon and caecum appear later than proseptum. The proseptum is an extraordinary element dissimilar to subsequent septa.

4

The discovery of Rhabdopleura (Pterobranchia) in the Jurassic of Poland

100%

Kulicki C.

Acta Palaeontologica Polonica

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1969

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tom 14

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nr 4

Fragments of tubarium of Rhabdopleura kozlowskii n.sp., etched from calcareous concretions occurring in Callovian clays in Łapiguz clay pit in Łuków are described. Comparisons with the species Rh. vistulae Kozłowski from Danian of Poland and the Recent Rh. normani Allman fmm Norway have shown that Rh. kozłowskii n. sp. more strongly resemb1es the Recent species.

5

Septal neck-siphuncular complex in Stolleyites [Ammonoidea], Triassic, Svalbard

100%

Kulicki C.

Polish Polar Research

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1994

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tom 15

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nr 1-2

37-49

6

Halina Pugaczewska [1921-1997]

100%

Kulicki C.

Acta Palaeontologica Polonica

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1997

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tom 42

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nr 4

7

The Jurassic juvenile ammonites of the Jagua Formation, Cuba

63%

Kulicki C., Wierzbowski A.

Acta Palaeontologica Polonica

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1983

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tom 28

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nr 3-4

Early ontogenetic stages of some Ammonitina (mostly Perisphinctidae) are described from the Oxfordian Jagua Formation of western Cuba. Fourty six percent of the sample are specimens attaining the nepionic swelling with more than four septa developed. Juvenile jaw apparatus found for the first time in specimens with only 2,25 whorls, displays primitive elements corresponding to conchorhynch and rhyncholit of nautiloids, litoceratids and phylloceratids. The fauna and sediment features evidence a low water energy and low oxigenated conditions at the bottom during the sedimentation. The juvenile ammonites occur together with numerous adults which are represented by corresponding micro- and macroconchs; it indicates for the proximity of a breeding place.

8

Cephalopod arm hooks from the Jurassic of Poland

63%

Kulicki C., Szaniawski K.

Acta Palaeontologica Polonica

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1972

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tom 17

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nr 3

The paper presents descriptions of 22 morphological types of cephalopod arm hooks found mainly in three Middle and Upper Jurassic localities in Poland. The majority of them were included in 7 new genera, Acanthuncus, Arcuncus, Cornuncus, Deinuncus, Falcuncus, Longuncus and Urbanekuncus and 12 new species; the remaining 10 forms are described without specific names. Morphology of fossil cephalopod hooks, hooks of Recent calmars and jaws of fossil and Recent polychaetes are compared. It was found that the genera Paraglycerites Eisenack and Arites Kozur hitherto considered as scolecodonts appear to be cepha lopod hooks. The stratigraphical value of the material is briefly discussed.

9

Development and calcification of the ammonitella shell

63%

Kulicki C., Doguzhaeva L. A.

Acta Palaeontologica Polonica

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1994

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tom 39

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nr 1

17-44

Aconeceras trautscholdi ammonitellae mass occurring in the Aptian of Symbirsk, central Russia represent consecutive calcification stages of the primary organic shell wall. Already after the formation of the organic shell with proseptum, the first whorl and umbilical walls of the initial chamber were calcified, then the remaining part of the initial chamber, and finally the nacreous primary constriction was formed and the proseptum was calcified. The original mineral participating in calcification was aragonite, which formed primary prismatic layers. The ammonite embryonic shell was thus formed similarly to the archaeogastropod larval shell. This explains the microstructural distinction of the ammonitella and proseptum walls with respect to the rest of the ammonite shell.

10

Graptolite-like fibril pattern in the fusellar tissue of Palaeozoic rhabdopleurid pterobranchs

63%

Mierzejewski P., Kulicki C.

Acta Palaeontologica Polonica

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2001

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tom 46

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nr 3

The fusellar tissue of Palaeozoic rhabdopleurid pterobranchs has been studied using the SEM techniques. The fibrillar material of Ordovician Kystodendron ex gr. longicarpus and Rhabdopleurites primaevus exhibits a distinct dimorphism, comprising: (1) thinner, wavy and anastomosing/branching fusellar fibrils proper, producing a tight three-dimensional meshwork; and (2) long, more or less straight and unbranched cortical fibrils, sometimes beaded, and arranged in parallel. These fibrils are similar to the fusellar and cortical fibrils of graptolites, respectively. Until now, dimorphic fibrils and their arrangement within fusellar tissue were regarded as unique characters of the Graptolithina. In general, the fibrillar material of these fossils is partially preserved in the form of flaky material (new term) composed of flakes (new term). Flakes are interpreted as flattened structures originating from the fusion of several neighbouring tightly packed fibrils. A Permian rhabdopleurid, referred to as Diplohydra sp., reveals a fabric and pattern of fusellar tissue similar to that of both Ordovician rhabdopleurids but devoid (?) of cortical fibrils. The results presented here question views that: (1) substantial differences in fabric and pattern of fusellar tissue exist between fossil pterobranchs and graptolites; and (2) the ultrastructure of pterobranch periderm has remained unchanged at least since the Ordovician. The Palaeozoic rhabdopleurids investigated are closer ultrastructurally to graptolites than to contemporary pterobranchs. The pterobranchs and the graptolites should be treated as members of one class - the Graptolithoidea.

11

Cortical fibrils and secondary deposits in periderm of the hemichordate Rhabdopleura [Graptolithoidea]

63%

Mierzejewski P., Kulicki C.

Acta Palaeontologica Polonica

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2003

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tom 48

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nr 1

Coenecia of extant hemichordates Rhabdopleura compacta and Rh. normani were investigated using SEM techniques. Cortical fibrils were detected in their fusellar tissue for the first time. The densely packed cortical fibrils form a characteristic band−like construction in fusellar collars, similar to some Ordovician rhabdopleurids. No traces of external secondary deposits are found in coenecia. Two types of internal secondary deposits in tubes are recognized: (1) membranous deposits, composed of numerous, tightly packed sheets, similar to the crustoid paracortex and pseudocortex; and (2) fibrillar deposits, devoid(?) of sheets and made of cortical fibrils, arranged in parallel and interpreted as equivalent to graptolite endocortex. There is no significant difference in either the shape or the dimensions of cortical fibrils found in Rhabdopleura and graptolites. The cortical fabric of both rhabdopleuran species studied is composed of long, straight and more or less wavy, unbranched fibrils arranged in parallel; their diameters vary from 220 to 570 µm. The study shows that there is no significant difference between extinct and extant Graptolithoidea (= Pterobranchia) in the histological and ultrastructural pattern of their primary and secondary deposits of the periderm. The nonfusellar periderm of the prosicula is pitted by many depressions similar to pits in the cortical tissue of graptolites.

12

Discovery of Pterobranchia [Graptolithoidea] in the Permian

63%

Mierzejewski P., Kulicki C.

Acta Palaeontologica Polonica

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2002

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tom 47

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nr 1

The fossil remains of a hemichordate exoskeleton, recognized as fragments of the stolons and their cyst−like swellings connected with the fusellar zooidal tubes, were derived by chemical isolations from Late Permian (Kazanian) mudstones of the Svalis Dome (central Barents Sea, Norway). These fossils, referred to as Diplohydra szaniawskii sp. nov., are the first undoubted representatives of the class Graptolithoidea found in Permian deposits. The genus Diplohydra Kozłowski, 1959, known previously only from the Ordovician and originally established as a thecate hydroid taxon, is reinterpreted as an aberrant member of the order Rhabdopleuroidea. This strange hemichordate, characterized by fusellar tubes distinctly narrower than stolon−like tubes and their swellings, reveals a certain degree of dimorphism in the stolon system. D. szaniawskii sp. nov. also displays some peculiar morphological features common to the Ordovician rhabdopleuroid genus Rhabdopleurites Kozłowski and the stolonoid genus Stolonodendrum Kozłowski.

13

Primary structure of the connecting ring of ammonoids and its preservation

51%

Kulicki C., Tanabe K., Landman N. H.

Acta Palaeontologica Polonica

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2007

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tom 52

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nr 4

The most distinctive and important element of the hydrostatic organ of ammonoids and nautiloids is the siphuncular tube. It consists of mineral and organic segments (so−called connecting rings). The connecting ring of ammonites never preserves its original organic matter in the mineralized state, usually having undergone diagenetic phosphatisation, more rarely, calcification, or even complete loss. Our knowledge about its original ultrastructure is based upon comparison with Recent Nautilus and phosphatised or calcified ammonite fossils. We show that depending on the taphonomic history, both calcium phosphate and calcite can participate in the diagenesis of the connecting ring wall. Under standard light microscopy, the phosphatised elements are indistinguishable from the calcified ones. Both are dark brown in colour, due to an excess of carbon. The structure of the phosphatised siphuncle does not closely replicate the structure of its organic elements. This casts doubts on conclusions of other authors who described a complex porous structure in ammonite siphuncles, which is completely dissimilar to the siphuncular structure of Recent Nautilus and suggests that this organ functioned differently in ammonites. SEM observations using a BSE detector on the calcified parts of the walls of connecting rings revealed a multilayered structure with perpendicular elements connecting particular layers, resembling the structure of a stacked nacreous layer.

14

Fauna and stratigraphy of the Uppermost Triassic and the Toarcian and Aalenian deposits in Sassenfjorden, Spitsbergen

51%

Wierzbowski A., Kulicki C., Pugaczewska H.

Acta Palaeontologica Polonica

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1981

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tom 26

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nr 3-4

15

The world`s oldest crustoid graptolites from the Upper Tremadocian of Poland

51%

Mierzejewski P., Kulicki C., Urbanek A.

Acta Palaeontologica Polonica

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2005

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tom 50

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nr 4

721-724

The Crustoidea are an order of sessile basic graptolites that are morphologically intermediate between the extant genus Rhabdopleura (Rhabdopleuroidea) and the extinct sessile order—the Dendroidea (Kozłowski 1962, 1966; Bulman 1970; Urbanek 1986). So far these rather poorly known graptolites of significant phylogenetic importance have been reported from the upper Arenigian or lower Llanvirnian (Kozłowski 1962) to the upper Ludlow (Mierzejewski 1977). Isolated fragments of the graptolite stolon system were chemically extracted from upper Tremadocian chert nodules from Wysoczki (Holy Cross Mountains, central Poland) and examined with SEM. Because of the characteristic trifurcation and fine annulation of the stolons they are recognized as remnants of the crustoid graptolites. This discovery extends the stratigraphic distribution of the crustoid graptolites and explains the enigmatic presence of graptoblasts in the upper Tremadocian beds of Wysoczki.

16

Dorsal shell wall in ammonoids

51%

Kulicki C., Tanabe K., Landman N. H., Mapes R. H.

Acta Palaeontologica Polonica

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2001

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tom 46

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nr 1

In ammonoids, a soft body organ (possibly a supracephalicmantle fold), extending from the conch aperture secreted aragonitic wrinkles, forming a layer on the surface of the preceding whorl. The dorsal shell wall consists of the outer and inner components which were deposited sequentially, beginning at the aperture of the living chamber inwards. The dorsal wall attains its full thickness near the last septum. The outer component is visible in the apertural region and is smooth or wrinkled; it is called the wrinkled layer in the latter case. The wrinkles may be continuous, interrupted, or form isolated patches arranged in rows. The wrinkles are usually triangular in cross section. A further stage of dorsal wall development involves filling in the space between the apices of triangles, and then adding one or more inner prismatic layers from the inside of the living chamber. This pattern occurs at least in the postembryonic stage of all genera studied, belonging to five suborders of Ammonoidea ranging from Late Carboniferousto Late Cretaceous. In many genera, the outer component of the dorsal shell wall exhibits remarkable ontogenetic change in its ultrastructure and microornament. It may be compared with the black film of Recent Nautilus shells with respect to place of formation. The outer component of the ammonoid dorsal shell wall is regarded as a product of organic secretion and carbonate precipitation in the area of the supracephalic mantle fold.

17

Precursory siphuncular membranes in the body chamber of Phyllopachyceras and comparisons with other ammonoids

51%

Tanabe K., Kulicki C., Landman N. H.

Acta Palaeontologica Polonica

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2005

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tom 50

|

nr 1

Organic membranes preserved in the rear part of the body chamber of the Late Cretaceous phylloceratid ammonite Phyllopachyceras ezoense were examined with scanning electron microscopy (SEM) on the basis of well−preserved specimens from Hokkaido, Japan. SEM observations revealed that the membranes are continuous with the siphuncular tube wall in the phragmocone and consist of two layers, both of which are made of a dark, primarily conchiolin material; namely, a thinner inner homogeneous layer and a thicker outer layer with gently inclined pillar−like units. Hence, they are interpreted as the precursory siphuncular membranes. The precursory siphuncular membranes are not associated with any other organic components such as the siphuncular sheets reported in some Paleozoic and Mesozoic ammonoids. Unlike the tube−like condition in the phragmocone, the precursory siphuncular membranes in the body chamber of the specimens examined do not form a tube shape; on the ventral side the membranes are truncated and directly contact the outer shell wall. These observations suggest that the inner and outer layers of the precursory siphuncular membranes in the body chamber were respectively formed by the siphuncular epithelium from the inner side and by the invaginated septal epithelium from the outer side. It is also postulated that at the initial stage of septal formation, the rear part of the body moved slowly forward, developing a circumsiphonal invagination of the septal epithelium. Because similar conchiolin membranes are occasionally preserved in the body chambers of other phylloceratids, the above morphogenetic process applies to all members of the Phylloceratina. The tube−shaped structure in the rear part of the body chamber of desmoceratid Damesites consists only of nacreous layer. We interpret it as a pathologically overgrown prochoanitic septal neck.

Ograniczanie wyników

New observations on Rhabdopleura kozlowskii (Pterobranchia) from the Bathonian of Poland

Remarks on the embryogeny and postembryonal development of ammonites

Structure and mode of origin of the ammonite proseptum

The discovery of Rhabdopleura (Pterobranchia) in the Jurassic of Poland

Septal neck-siphuncular complex in Stolleyites [Ammonoidea], Triassic, Svalbard

Halina Pugaczewska [1921-1997]

The Jurassic juvenile ammonites of the Jagua Formation, Cuba

Cephalopod arm hooks from the Jurassic of Poland

Development and calcification of the ammonitella shell

Graptolite-like fibril pattern in the fusellar tissue of Palaeozoic rhabdopleurid pterobranchs

Cortical fibrils and secondary deposits in periderm of the hemichordate Rhabdopleura [Graptolithoidea]

Discovery of Pterobranchia [Graptolithoidea] in the Permian

Primary structure of the connecting ring of ammonoids and its preservation

Fauna and stratigraphy of the Uppermost Triassic and the Toarcian and Aalenian deposits in Sassenfjorden, Spitsbergen

The world`s oldest crustoid graptolites from the Upper Tremadocian of Poland

Dorsal shell wall in ammonoids

Precursory siphuncular membranes in the body chamber of Phyllopachyceras and comparisons with other ammonoids