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Tytuł:
A new genus of patellogastropod with unusual protoconch from Miocene of Paratethys
Autorzy:
Anistratenko, O Y
Bandel, K.
Anistratenko, V.V.
Powiązania:
https://bibliotekanauki.pl/articles/21085.pdf
Data publikacji:
2006
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Tectura zboroviensis
Miocene
ontogenesis
Patellogastropoda
protoconch
Tectura pseudolaevigata
Tectura angulata
morphology
teleoconch
paleontology
Opis:
The protoconch and teleoconch morphology of “Tectura” angulata, “Tectura” pseudolaevigata from the Sarmatian and “Tectura” zboroviensisfrom the Badenian of the Eastern Paratethys have been studied in detail for the first time. The new genus Blinia is established for Sarmatian species which are characterized by a protoconch indicative of lecithotrophic type of early development lacking even a short free−swimming larval stage. In contrary the protoconch of Badenian “Tectura” zboroviensis demonstrates features of the shell typical for planktonic larva. The shape and proportions of a pancake−like protoconch in Blinia species suggest the development of young snails in brood pouch in the mantle cavity of maternal individual. The independence of Blinia gen. nov. from other Patellogastropoda such as Tectura, Patella, and Helcion is supported also by characteristics of shell structure. Typical patellogastropod protoconchs are present in the Badenian and the first half of the early Sarmatian and the protoconchs indicating lecithotrophic development are observed in patellogastropods only from the younger half of early Sarmatian and middle Sarmatian deposits. The change in ontogenetic strategy occurred during time of lowered salinity in the Paratethys. We suggest that the snails’ reproductive strategy was modified and free larval life was suppressed to cope with salinity change in the ambient water.
Źródło:
Acta Palaeontologica Polonica; 2006, 51, 1
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stan rozwoju mowy dzieci urodzonych z ciąży bliźniaczej i ciąży pojedynczej – analiza porównawcza
The State of Speech Development of Single – and Twin-Born Children – Comparative Analysis
Autorzy:
Balcerzak, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/1938270.pdf
Data publikacji:
2021-06-02
Wydawca:
Polskie Towarzystwo Logopedyczne
Tematy:
ontogeneza mowy
ciąża mnoga
bliźniactwo
rozwój mowy bliźniąt
opoźnienie w rozwoju mowy
speech ontogenesis
twin pregnancy
twinning
twins’ language development
delay in twin’s speech development
Opis:
W niniejszym artykule podjęto temat rozwoju mowy dzieci urodzonych z ciąży mnogiej. Z uwagi na specyficzne uwarunkowania społeczne, a także szczególne obciążenia neotologiczne bliźniąt, należą one do grupy dzieci z ryzykiem zaburzeń rozwojowych. Przejawem zaburzeń roz-woju dzieci z ciąż mnogich mogą być zaburzenia dynamiki w nabywaniu systemu językowego. Na potrzeby niniejszego opracowania badań dokonano analizy porównawczej stanu kompetencji i sprawności językowych w zakresie poszczególnych podsystemów języka grupy dzieci z ciąży po-jedynczej oraz grupy bliźniąt. Za problemem badawczy przyjęto pytanie: czy szczególne uwarun-kowania biologiczne i środowiskowe bliźniąt determinują dynamikę nabywania przez nie systemu językowego? Badaniem objęto dziewięcioro dzieci 3-letnich, w tym trzy pary rodzeństwa bliźnia-czego stanowiących grupę badaną oraz troje dzieci urodzonych z ciąży pojedynczej, stanowiących grupę kontrolną.
This article presents the subject of speech development of twin-born children. Due to the significant importance of environmental and neotological factors, twins are considered to be at risk of developmental disorders. This is manifested by language delay and quantitative and qualitative differences in all aspects of the language, compared to children born from single pregnancies. In this study it was made a comparative analysis of the state of linguistic competences of all language subsystems in the group of single- and twin-born children. The research problem has become the question: do the specific biological and environmental conditions of twin pregnancy determine the dynamics of acquiring the language system by them? The study concerned nine 3-year-old children, including three pairs of twins constituting the research group and three children born from a single pregnancy constituting the control group.
Źródło:
Logopedia; 2020, 49, 2; 177-196
0459-6935
Pojawia się w:
Logopedia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The regulatory role of AtDeg5 chloroplast protease in chronological progression of principal growth stages in Arabidopsis thaliana plants
Autorzy:
Baranek, M.
Lucinski, R.
Jackowski, G.
Powiązania:
https://bibliotekanauki.pl/articles/80598.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
conference
serine-type protease
chymotrypsin
thylakoid membrane
photosystem II
protease
chloroplast
Arabidopsis thaliana
ontogenesis
growth stage
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 3
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wartości w perspektywie epistemologii ewolucyjnej Konrada Lorenza
Values in the Perspective of Konrad Lorenz’s Evolutionary Epistemology
Autorzy:
Breś, Jerzy
Powiązania:
https://bibliotekanauki.pl/articles/2013443.pdf
Data publikacji:
2006
Wydawca:
Katolicki Uniwersytet Lubelski Jana Pawła II. Towarzystwo Naukowe KUL
Tematy:
aksjologia
epistemologia
ewolucja
filogeneza
genotyp
harmonia
instynkt
kultura
norma
odczucie
ontogeneza
poznanie
prawda
teleonomia
wartość
wiedza
redukcjonizm
system
axiology
epistemology
evolution
phylogenesis
genotype
harmony
instinct
culture
norm
impression
ontogenesis
cognition
truth
teleonomy
value
knowledge
reductionism
Opis:
The article presents Konrad Zacharias Lorenz’s views concerning man’s axiological space. According to Lorenz the origin of the cognitive apparatus is defined by the need to maintain orientation in the world. The apparatus is determined (ambiguously) by the biological and cultural factors. Also tendencies to accept a given type of values are dependent on inborn instincts. The harmony of mutual coexistence of biological and cultural norms is a manifestation of a ‘healthy functioning of the world of values’. In recognizing values an important role is attributed to emotions. The specificity of the act of valuation results from its subjectivity outside a direct control of acts of consciousness.
Źródło:
Roczniki Filozoficzne; 2006, 54, 1; 5-17
0035-7685
Pojawia się w:
Roczniki Filozoficzne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Quality of life and physical activity of kindergarden teachers
Autorzy:
Brodáni, Jaroslav
Žišková, Ivana
Powiązania:
https://bibliotekanauki.pl/articles/1031773.pdf
Data publikacji:
2015
Wydawca:
PPHU Projack Jacek Wąsik
Tematy:
activity
age
kindergarden
life quality
ontogenesis
relations
teachers
Opis:
The contribution presents the relationship between the frequency of physical activity during the week and fields of life quality of kindergarden teachers in three mature parts. In the research took part kindergarden teachers from Slovakia (n = 211) who were divided into groups according to their ontogenesis. The life quality was observed with a modified questionnaire SQUALA and the physical activity level frequency during the week. The data is presented by descriptive characteristics (n, M, SD) and statistic importance of differences, let us say relationships which are measured by non-parametric methods (W, U, rs), by the importance level (p<0.05; p<0.10). The results showed the most numerous correlations between the physical activity during the week and fields of life quality of teachers in age group from 36-46 years (middle mature) who do the physical activity M: 3.250 during the week by SD: 2.761. In this group were proved positive correlations with the field of physical well-being (p<0.01), psychosocial well-being (p<0.01), material well-being (p<0.01), education (p<0.10), free time (p<0.05), appearance and property of things (p<0.01). Specially this age is characteristic by reaching the highest goals of physical and mental performance. In the groups of younger and older mature we do not find so many important relationships between the physical activity and some fields of life quality. In these groups we did not find any important correlations of physical activity with physical well-being where the group of young mature reached the same level of physical activity as the group of middle mature. The conclusions show the importance of physical activity in life of kindergarden teachers, they show some possibilities of influencing the life quality through the physical activities but also creating the optimal conditions possibilities to increase the life quality in social environment. The contribution is part of the Ministry of Education grant KEGA 014UKF-4/2013 Improving the quality and level of health of adolescents by means of physical activity in primary and secondary schools.
Źródło:
Physical Activity Review; 2015, 3; 11-21
2300-5076
Pojawia się w:
Physical Activity Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Morphogenetic Description of Thigmokeronopsis stoecki Shao et al., 2008 (Ciliophora, Hypotricha) and a Comparison with Members of the Family Pseudokeronopsidae
Autorzy:
Chen, Xumiao
Li, Jiqiu
Hu, Xiaozhong
Shao, Chen
Al-Farraj, Saleh A.
Al-Rasheid, Khaled A. S.
Powiązania:
https://bibliotekanauki.pl/articles/763473.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Tematy:
Hypotrichs, ontogenesis, Pseudokeronopsidae, Thigmokeronopsis
Opis:
The urostylid family Pseudokeronopsidae Borror and Wicklow, 1983 was considered to be a well-outlined taxon. Nevertheless, recent evidence, including morphological, ontogenetic, and molecular information, has consistently revealed the polyphyly of this family. In the present work, a new population of Thigmokeronopsis stoecki Shao et al., 2008 was found and its binary divisional process was described for the first time. In addition, the morphogenetic features of Thigmokeronopsis species and all the other pseudokeronopsids, for which detailed ontogenetic data are available, were rechecked and compared. This reveals that: (1) the ontogenetic process of T. stoecki corresponds well with its congeners T. jahodai and T. rubra except for the macronuclear behavior; (2) Apokeronopsis and Thigmokeronopsis share a similar ontogenetic mode despite of the differences in the number and origin of their buccal cirri; (3) most pseudokeronopsids share the same pattern in the origins of their oral primordia and fronto-ventral-transverse cirral anlagen, except for Pseudokeronopsis similis, which may not be a valid member of the family Pseudokeronopsidae.
Źródło:
Acta Protozoologica; 2013, 52, 2
1689-0027
Pojawia się w:
Acta Protozoologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A giant skull of the temnospondyl Xenotosuchus africanus from the Middle Triassic of South Africa and its ontogenetic implications
Autorzy:
Damiani, R
Powiązania:
https://bibliotekanauki.pl/articles/21570.pdf
Data publikacji:
2008
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Temnospondyli
Triassic
paleontology
ontogenesis
Africa
Middle Triassic
variation
temnospondyl form
Xenotosuchus africanus
South Africa
skull
Opis:
A previously unreported large skull of the mastodonsaurid temnospondyl Xenotosuchus africanus, from the Cynognathus Assemblage Zone (Early to Middle Triassic) of the Beaufort Group, Karoo Basin of South Africa, is described. The species is plesiomorphic in most aspects of its cranial anatomy, and only one autapomorphy is tentatively identified herein, namely contact between the left and right exoccipitals posterior to the parasphenoid. The new specimen permits recognition of a growth series for X. africanus from sub−adult (all previously known specimens) to fully adult (new specimen) stages. Ontogenetic changes associated with this include changes in skull proportions, and changes in the morphology of the lacrimal flexure, frontal, postfrontal, cultriform process and body of the parasphenoid, and the transvomerine tooth row.
Źródło:
Acta Palaeontologica Polonica; 2008, 53, 1
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The growth of body mass and linear development of Simmental heifers of different constitution types in the Carpathian pre-mountain region
Masa ciała i rozwój cech liniowych jałówek rasy simmental w różnych typach konstytucji w regionie przedgórskim
Autorzy:
Fedak, V.
Vovk, S.
Polulikh, M.
Shelevach, A.
Fedak, N.
Stadnitska, O.
Powiązania:
https://bibliotekanauki.pl/articles/2619258.pdf
Data publikacji:
2020
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
heifer
Simmental breed
ontogenesis
postnatal development
body mass
body measurement
body structure
Carpathian Region
Źródło:
Acta Scientiarum Polonorum. Zootechnica; 2020, 19, 1; 25-30
1644-0714
Pojawia się w:
Acta Scientiarum Polonorum. Zootechnica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The type species of Cyrtosymbole and the oldest [Famennian] cyrtosymboline trilobites
Autorzy:
Feist, R
Lerosey-Aubril, R.
Powiązania:
https://bibliotekanauki.pl/articles/22254.pdf
Data publikacji:
2005
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
cyrtosymboline trilobite
trilobite
Famennian
Trilobita
Cyrtosymbole
ontogenesis
Cyrtosymbolinae
Proetidae
Devonian
Dechenella escoti
paleontology
Opis:
The hitherto poorly known type species of Cyrtosymbole, i.e., Dechenella escoti, is redescribed on the basis of an abundant new material recovered from the early Famennian Lower Griotte Limestone Formation at La Tourière, near Cabrières, southern France. It includes sclerites (hypostome, librigenae, thoracic segments and external surface of the pygidium) that previously were either unknown, or represented by poorly preserved and incomplete specimens, together with a full suite of post−protaspid growth stages. The latter has revealed that certain characters, in particular the preglabellar region and postocular facial sutures, show marked changes between the early and late holaspid stages. In the past, some species have been based on immature specimens; for example the lectotype of C. escoti is an early holaspis, and the characters that it displays have been regarded as diagnostic of the genus. For confident specific assignments in cyrtosymboline trilobites it is important, therefore, to have to hand sufficient material, including late holaspids. A revised diagnosis of Cyrtosymbole is given, and only those species that share diagnostic adult characters with C. escoti are assigned to it. Insights into early growth development exemplified by C. escoti and allies corroborate the attribution of the Cyrtosymbolinae to the Proetidae.
Źródło:
Acta Palaeontologica Polonica; 2005, 50, 3
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Five New Spathidiids (Ciliophora: Haptoria) from Caribbean Tank Bromeliads
Autorzy:
Foissner, Wilhelm
WOLF, Klaus W.
KUMAR, Santosh
QUINTELA-ALONSO, Pablo
Powiązania:
https://bibliotekanauki.pl/articles/763469.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Tematy:
Biodiversity, Dominican Republic, Jamaica, lepidosomes, ontogenesis of Spathidium bromeliophilum, resting cysts
Opis:
There is a widespread belief that spathidiids have few morphological features. In contrast, we show a rich morphological diversity in five new species discovered in tank bromeliads from the Caribbean, using live observation; protargol impregnation; morphometry; scanning electron microscopy; and resting cyst morphology, demonstrating lepidosomes (organic scales) for the first time in spathidiid haptoria. Arcuospathidium bromelicola nov. spec. is very similar to the previously described A. muscorum but its resting cyst has conspicuous, pillar-shaped lepidosomes on the surface. Protospathidium lepidosomatum nov. spec. is very similar to the previously described P. muscicola but has outstanding, nipple-shaped (vs. conical) lepidosomes on the cyst surface. Spathidium bromeliophilum nov. spec., whose ontogenesis is highly similar to that of S. turgitorum, differs from similar species by the body length:width ratio, the number of ciliary rows, the shape of the oral bulge, and details of the ciliary pattern. Spathidium bromelicola nov. spec. is similar to S. muscicola (extrusomes bluntly fusiform and 4 µm long vs. rod-shaped and > 15 µm long) and S. stammeri (resting cyst wall smooth vs. spinous). Spathidium wolfi nov. spec. has an anterior and a posterior contractile vacuole. It differs from the supposed nearest relative, S. faurefremieti, by body size (on average 135 × 25 µm vs. 240 × 17 µm), the shape of the macronucleus (moniliform vs. a long, tortuous strand), and the total number of dorsal brush bristles (on average 47 vs. 72). The bent oral bulge of Arcuospathidium bromelicola and Spathidium bromeliophilum as well as the occurrence of lepidosomes on the cyst surface of Arcuospathidium bromelicola and Protospathidium lepidosomatum are discussed.
Źródło:
Acta Protozoologica; 2014, 53, 2
1689-0027
Pojawia się w:
Acta Protozoologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Phyllotactic pattern formation in early stages of cactus ontogeny
Autorzy:
Gola, E M
Powiązania:
https://bibliotekanauki.pl/articles/59078.pdf
Data publikacji:
2006
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
phyllotactic transformation
pattern formation
early stage
cactus
Cactaceae
ontogenesis
phyllotaxis
Opis:
Representatives of the family Cactaceae are characterized by a wide range of phyllotaxis. To assess the origin of this diversity, early stages of phyllotactic pattern formation were examined in seedlings. The analysis of the sequence of areole initiation revealed intertribal differences. In seedlings from the Trichocereeae (Gymnocalycium, Rebutia) and Notocacteae (Parodia) tribes, two opposite cotyledonal areoles developed as the first elements of a pattern. Usually, next pair of areoles was initiated perpendicularly to cotyledonal areoles, starting the decussate pattern. This pattern was subsequently transformed into bijugate or into simple spiral phyllotaxis. In seedlings from the Cacteae tribe (Mammillaria and Thelocactus), cotyledonal areoles were never observed and the first areoles always appeared in the space between cotyledons. It was either areole pair (mainly in Mammillaria), starting a decussate pattern, or a single areole (mainly in Thelocactus) quickly followed by areoles spirally arranged, usually in accordance with the main Fibonacci phyllotaxis. Differences in the initial stages of pattern formation do not fully explain the phyllotaxis diversity in mature cacti. Only two, the most common phyllotactic patterns occurred in the early development of studied seedlings, i.e. the main Fibonacci and the decussate pattern. Discrepancy in the range of phyllotactic spectra in seedlings and in mature plants suggests that phyllotaxis diversity emerges during further plant growth. Initial phyllotactic transformations, occurring already in the very early stages, indicate great plasticity of cactus growth and seem to support the hypothesis of the ontogenetic increase of phyllotaxis diversity due to transformations.
Źródło:
Acta Societatis Botanicorum Poloniae; 2006, 75, 4; 271-279
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The TDP method of seed yield component analysis in grain legume breeding
Autorzy:
Golaszewski, J
Idzkowska, M.
Milewska, J.
Powiązania:
https://bibliotekanauki.pl/articles/2044235.pdf
Data publikacji:
1998
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
breeding population
path analysis
stem
treatment factor
multiple regression
yield component
grain legume
multivariate method
seed
two-dimensional partitioning method
Vicia faba
ontogenesis
plant height
fruiting node
broad bean
fodder pea
Pisum sativum
Opis:
The results of plant breeding trials with populations of fodder pea strains and broad bean hybrids were the basis of consideration on the interrelationship between some traits - the yield structure elements. Developed by Eaton, a relatively new method of yield component analysis called the two-dimensional partitioning method (TDP) was applied to analyse the data. The method, which combines multiple regression and ANOVA, allows for concise tabular presentation and simple interpretation of the distribution of traits in one direction and the sources of variance according to ANOVA model in the other direction. Additionally, the interpretation of the results was supported by such standard statistical techniques as ANOVA, simple and multiple regression and path analysis. The main components of pea yielding were plant height and the number of pods per plant. Among the analysed characters of broad bean the number of nodes with pods on the main stem, which turned out to be the determinant of broad bean yielding, might be strongly affected by environmental conditions. The number of nodes with pods might be considered a selecting character of high potential yielding of broad bean genotypes.
Źródło:
Journal of Applied Genetics; 1998, 39, 4; 299-308
1234-1983
Pojawia się w:
Journal of Applied Genetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Infraciliature and Cell Division of the Little Known Freshwater Ciliate Uroleptus cf. magnificus (Kahl, 1932) Olmo, 2000 (Hypotricha, Uroleptidae), and List of Published Names in Uroleptus Ehrenberg, 1831 and Paruroleptus Wenzel, 1953
Autorzy:
He, Wei
Shao, Chen
Shi, Xinbai
Berger, Helmut
Powiązania:
https://bibliotekanauki.pl/articles/763702.pdf
Data publikacji:
2011
Wydawca:
Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Tematy:
China, Ciliophora, Dorsomarginalia, morphogenesis, ontogenesis, Rigidothrix, Stichotrichia
Opis:
In 1988, we found a large (250–400 × 80–150 μm in protargol preparations) Uroleptus-like hypotrich in a freshwater pond in Harbin, China. We studied the morphology of non-dividers and the cell division using protargol impregnation. Since we disregarded live observations and due to the lack of a modern revision of the uroleptids, a final identification was not possible. A detailed comparison with the most similar limnetic Uroleptus-like hypotrichs and with Rigidothrix goiseri revealed that the Chinese population is very likely identical with Uroleptus magnificus [basionym Holosticha (Paruroleptus) magnificus Kahl, 1932], a very rare species possibly confined to limnetic, stagnant water bodies of the holarctic region. Besides the large size, main features of U. cf. magnificus are: (i) about 80 adoral membranelles; (ii) three or four inconspicuous transverse cirri; (iii) 5–8 dorsomarginal kineties; (iv) the oral primordium originates de novo left of the postoral midventral cirri; (v) the frontal-ventral-transverse cirri anlagen of the proter and the opisthe originate via primary primordia; (vi) the left frontal cirrus of the proter originates from the middle portion of the disorganizing parental paroral; (vii) the parental endoral becomes the undulating membrane anlage for the proter; and (viii) the frontoterminal cirri originate in the plesiomorphic manner, that is, from the rearmost anlage. A compilation reveals that 59 species, subspecies, etc. have been described in or assigned to Uroleptus and Paruroleptus, but only about 50% of them seem to be true uroleptids. Many species of this predominantly limnetic group are little known.
Źródło:
Acta Protozoologica; 2011, 50, 3
1689-0027
Pojawia się w:
Acta Protozoologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Miocene cyclopid copepod from a saline paleolake in Mojave, California
Autorzy:
Holynska, M.
Leggitt, L.
Kotov, A.A.
Powiązania:
https://bibliotekanauki.pl/articles/20781.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Miocene
cyclopid copepod
copepod
Copepoda
Cyclopidae
ontogenesis
biogeography
Barstow Formation
saline lake
paleontology
Mojave Desert
California
Opis:
There are remarkably few direct fossil records of Copepoda, which implies that current estimates of the lineage divergence times and inferences on the historical biogeography remain highly dubious for these small-sized crustaceans. The Cyclopidae, a predominantly freshwater copepod family with 1000+ species and distributed worldwide, has no fossil record at all. Recent collections from the middle Miocene Barstow Formation in Southern California resulted in ample material of finely preserved cyclopid fossils, including both adult and larval stages. To document the antennulary setation pattern in the adult and copepodid instars we used a coding system that is coherent between sexes and developmental stages. The majority of the cyclopid fossils, coming from saline lake environment, represent the modern genus Apocyclops, a euryhaline, thermophilic group occurring both in the New World and Old World. A new species Apocyclops californicus is described, based on the short medial spine and spiny ornamentation of the free segment of leg 5, spinule ornamentation of pediger 5, and well-developed protuberances of the intercoxal sclerite of leg 4. The presence of antennal allobasis and the features of the swimming legs unambiguously place the Miocene Apocyclops in the A. panamensis- clade, a predominantly amphi-Pacific group. The middle Miocene fossils with clear affinities to a subgroup of Apocyclops imply an early Miocene or Paleogene origin of the genus. Based on the geographic patterns of the species richness and morphology in Apocyclops and its presumed closest relative, genus Metacyclops, we hypothesize that: (i) the ancestor of Apocyclops, similar in morphology to some cave-dweller Metacyclops occurring today in the peri-Mediterranean region, might have arrived in North America from Europe via the Thulean North Atlantic bridge in the late Paleocene–early Eocene; (ii) Eocene termination of the Thulean land connection might have resulted in the divergence of Apocyclops from the Metacyclops stock.
Źródło:
Acta Palaeontologica Polonica; 2016, 61, 2
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Two Oxytrichids from the Ancient Lake Biwa, Japan, with Notes on Morphogenesis of Notohymena australis (Ciliophora, Sporadotrichida)
Autorzy:
Hu, Xiaozhong
KUSUOKA, Yasushi
Powiązania:
https://bibliotekanauki.pl/articles/763654.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Tematy:
Apoamphisiella, freshwater ciliate, infraciliature, Notohymena, ontogenesis, Stichotrichia
Opis:
Two oxytrichid freshwater ciliates, Apoamphisiella tihanyiensis (Gellért and Tamás, 1958) Foissner, 1997 and Notohymena australis (Foissner and O’Donoghue, 1990) Berger, 1999, were recorded for the first time in Lake Biwa, a 4-million-year-old lake located at the Shiga Prefecture in Japan. Their morphology was investigated based on observations of live and protargol-impregnated material. Based on the present observation and previous descriptions, A. tihanyiensis is characterized by having an elliptical body shape, yellowish cortical granules, two long frontoventral rows, enlarged frontal and transverse cirri, highly variable numbers of frontoventral, and postoral ventral cirri, and six to 11 caudal cirri arranged in three short rows. New data confirm the presence of pretransverse ventral cirri in this species. Morphologically, N. australis differs from its congeners in having the following combination of characters: greenish cortical granules, the cirrus V/2 located slight anterior to the leftmost transverse cirrus, dorsal kinety 3 almost as long as body, and seven to 10 caudal cirri arranged in three short rows. Morphogenesis in N. australis shows the same pattern as in N. apoaustralis but differs from that of other congeners in the origin of oral primordium and the formation of more than just three caudal cirri.
Źródło:
Acta Protozoologica; 2015, 54, 2
1689-0027
Pojawia się w:
Acta Protozoologica
Dostawca treści:
Biblioteka Nauki
Artykuł
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