Renate Matzke-Karasz

Renate Matzke-Karasz
Ludwig-Maximilians-University of Munich | LMU · Department of Earth and Environmental Sciences

Dr. rer. nat., habil.

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73
Publications
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636
Citations

Publications

Publications (73)
Article
Full-text available
Cypridoidean ostracods are one of a number of animal taxa that reproduce with giant sperm, up to 10 000 µm in length, but they are the only group to have aflagellate, filamentous giant sperm. The evolution and function of this highly unusual feature of reproduction with giant sperm are currently unknown. The hypothesis of long-term evolutionary per...
Article
Full-text available
In an extensive ostracod assemblage recovered from the Bitesantennary Site, an Early Miocene (23–16 Ma) cave deposit within the Riversleigh World Heritage Area in north-west Queensland, Australia, 26 specimens were found to have soft part preservation. This is the first known example of soft part preservation in ostracods that were living in a pala...
Article
Full-text available
'Giant sperm', in terms of exceptionally long spermatozoa, occur in a variety of taxa in the animal kingdom, predominantly in arthropod groups, but also in flatworms, mollusks, and others. In some freshwater ostracods (Cypridoidea), filamentous sperm cells reach up to ten times the animal's body length; nonetheless, during a single copulation sever...
Article
Full-text available
Reproduction with giant sperm occurs in distinct groups scattered over the animal kingdom. Although experiments in Drosophila assessed the influence of different selection pressures on this character, no information was available on its long-term stability. Sub-micrometer-resolution synchrotron quantitative phase tomography (holotomography) of exce...
Article
Ostracods of the superfamily Cypridoidea have giant spermatozoa. However, little data exist on the sperm-egg interaction in this group: only two publications have so far given the most ambiguous indication that the entire sperm enters the egg on fertilization. These assumptions have not yet been tested with modern techniques, nor has their putative...
Article
As a famous fossil Lagerstätte, the mid-Cretaceous (ca. 100 Ma) amber from Kachin, northern Myanmar, harbors one of the most diverse Mesozoic palaeobiotas yet discovered. Over the past few years, reports of organisms trapped in Kachin amber have increased exponentially. Ostracods, as fully aquatic animals, are so far represented in Kachin amber by...
Article
Ostracods are the most abundantly preserved arthropod group in the fossil record, but they are almost entirely represented only by their calcitic carapaces. In over two hundred years of fossil ostracod research, only about 33 occurrences of fossil ostracods that include preserved appendages, or soft parts, have been reported. These range from the O...
Article
The bivalved crustacean ostracods have the richest fossil record of any arthropod group and display complex reproductive strategies contributing to their evolutionary success. Sexual reproduction involving giant sperm, shared by three superfamilies of living ostracod crustaceans, is among the most fascinating behaviours. However, the origin and evo...
Poster
Review of past work on ostracods in Northern Africa. Biographical and historical information, content of studies, and bibliography
Article
In her publication on a Holocene sedimentary succession of the Eastern Adriatic coast, here in the same volume, the author V. Hajek-Tadesse describes a new ostracod (Crustacea) species. She assigns it to the previously monospecific genus Juxilyocypris Kempf, 2011, which is now holding the two fossil species J. schwarzbachi (Kempf, 1967) and J. kemp...
Article
Full-text available
The Convention on Biological Diversity (CBD) commits its 196 nation parties to conserve biological diversity, use its components sustainably, and share fairly and equitably the benefits from the utilization of genetic resources. The last of these objectives was further codified in the Convention's Nagoya Protocol (NP), which came into effect in 201...
Article
Full-text available
Transitions from sexual to asexual reproduction are often associated with polyploidy and increased chromosomal plasticity in asexuals. We investigated chromosomes in the freshwater ostracod species Eucypris virens (Jurine, 1820), where sexual, asexual and mixed populations can be found. Our initial karyotyping of multiple populations from Europe an...
Article
Full-text available
Recently exposed loess–palaeosol sequences in the northern Alpine foreland close to Bobingen (southern Germany) were investigated with a multi-proxy approach combining isotopic, geochemical, lithological, and micropalaeontological methods. Luminescence ages date the sections into the Middle and Upper Würmian periods corresponding to Marine Isotope...
Article
Full-text available
In the northern Alpine region only a few lacustrine sediment sequences are known from the period of the last glacial, regionally assigned as Würmian. Even less is known about Alpine palaeoenvironments prior to the last glacial maximum (LGM). The recently discovered sediment sections at the Nesseltalgraben site (northern Alps, southern Germany) pres...
Article
Amber inclusions of fully aquatic animals are rare, most of them isolated specimens of water-bound insect larvae. In contrast, we here describe an ample, speciose fauna of 262 fully aquatic individuals of Ostracoda (Crustacea) from Mexican amber of Early Miocene age. This fauna was trapped whilst under water swimming around trunks of resin-producin...
Article
Full-text available
Previous studies of cypridoidean ostracods have noted that (1) their giant spermatozoa are immotile inside the male, (2) these spermatozoa are motile in the female seminal receptacle and (3) these receptacles are often filled with empty sperm coats. Such findings have led previous authors to hypothesize that sperm must shed their coats in the femal...
Article
Full-text available
Spermatozoa of the ostracod superfamily Cypridoidea include some of the longest in the animal kingdom, but unlike other so-called giant spermatozoa, they are aflagellate, probably evolved only once, and represent an exceptionally old trait. Sperm length variations within cypridoidean species remain poorly known, a lack that hinders the development...
Article
During an ostracod sampling campaign in the city of Munich (Germany) samples were taken from containers in a greenhouse of the Munich Botanical Garden. Beside the ubiquitous species Cypridopsis vidua (O. F. Müller, 1776), the samples contained four alien species, i.e., Chlamydotheca arcuata (Sars, 1901), Strandesia bicuspis (Claus, 1892), Tanycypri...
Article
ITIS, WoRMS, EOL, iBOL, GBIF, ANTABIF, OBIS. FlyBase, FishBase, FosFARbase, Fauna Europaea. World Modern Foraminifera Database, EDNA Fossil Insect Database, European Diatom Database, The Reptile Database, Mammalian Species of the World. Today’s biologists are blessed with databases, and there is no doubt about their relevance for scientific work. (...
Article
Length measurements of sperms of 51 species of Cypridoidea ostracods were taken to supplement the paucity of ostracod sperm data in the published literature. The lengths of the posterior regions (carrying the mitochondria) and the thinner anterior regions were also measured when appropriate. Maximum lengths of sperms for individual species varied f...
Article
Full-text available
The 1st International Symposium on Ostracoda (ISO) was held in Naples (1963). The philosophy behind this symposium and the logical outcome of what is now known as the International Research Group on Ostracoda (IRGO) is here reviewed, namely ostracodology over the last 50 years is sociologically analysed. Three different and important historic momen...
Article
’Giant sperm’, in terms of exceptionally long spermatozoa, occur in various taxa in the animal kingdom, particularly in arthropods. In freshwater ostracods (Cypridoidea) reproducing with giant sperm, males are equipped with a pair of specialized ejaculators, or Zenker organs, located in the distal part of vas deferens. We observed adult postmoult s...
Article
This chapter of the book The Recent and Fossil meet Kempf Database Ostracoda Festschrift Eugen Karl Kempf - Proceedings of the 15th International German Ostracodologists' Meeting contains a preface followed by acknowledgements. It also presents an extensive reference list on the ostracod family. The selected contributions in the book cover a broad...
Article
Full-text available
Specimens of a new species of the non-marine ostracod genus, Tanycypris Triebel, 1959 were found in samples from water plant containers, displayed in a greenhouse of the botanical garden in Munich, Germany. Beside the ubiquitous species Cypridopsis vidua O.F. Müller, 1776, the samples contained four alien species of the subfamily Cypricercinae, nam...
Article
Pestenacker and the adjacent Neolithic wetland sites Unfriedshausen and Pestenacker-Nord in southern Germany belonged to the Altheim culture from around 5750–5350 years cal. BP. In contrast to contemporaneous pile dwellings, the houses of Pestenacker were constructed at ground level in a wetland environment. Only little is known about the environme...
Conference Paper
During an ostracod sampling campaign in the city of Munich, Germany, samples were taken from containers in a greenhouse of the Munich Botanical Garden. The 1m² large containers accommodate non-native hydrophytes growing on sandy and muddy sediment in 1-10cm depths of water. Among others, the samples contained four alien species of the subfamily Cy...
Article
Mate selection is one of the motors of evolution and of particular importance in the case of organisms in which sexual and parthenogenetic populations coexist. Sexual populations of the ostracod species complex Eucypris virens are often mixed with parthenogenetic ones. A powerful mate selection mechanism must exist to avoid time, energy and sperm l...
Article
A new anatomical interpretation of the skeleto-musculature of the mandible in podocopid ostracodes is proposed based on ultrastructural observations of Loxoconcha pulchra Ishizaki, 1968 and Fabaeformiscandona tyrolensis (Löffler, 1963). Attachment cells with their numerous microfibers anchor the sclerotized lamella cuticle (chitinous rod) to the ou...
Article
The Tabriz Basin is located in NW Iran within the collision zone of the Arabian and Eurasian plates. Its Upper Miocene and ?Pliocene basin fill, termed Lignite Beds and Fish Beds, can provide detailed insights into the Neogene environments and processes during a time of intense tectonics and volcanism. However, a modern re-evaluation of the Lignite...
Article
Full-text available
While cypridoidean ostracods are famed for their giant spermatozoa, very little data on ostracod spermatozoa lengths exist. Of the thousands of species in this group, sperma-tozoa data is only available for about a dozen identified species. The longest spermato-zoa recorded for ostracods are those of Cypris sydneia KING, 1855, measuring in at a sta...
Article
Full-text available
The antennule is the first appendage of ostracods and in the superfamily Cypridoidea is known to have two presumed chemical receptors, the ya aesthetasc on the final segment and the Rome organ on the ventral side of the second moveable segment.Wouters (1999) was the first to document a third presumed chemical receptor on the antennule, the ‘new’ or...
Chapter
Full-text available
Fifteen International Symposia on Ostracoda (ISO) have been organized between 1963 and 2005, each of them followed by one or more proceedings volumes. In the present study, 906 titles presented at the occasion of one of these fifteen symposia were evaluated regarding their prevailing and their secondary theme or method, thus obtaining a retrospecti...
Article
1. The adaptive significance of the observed variations in sex ratios in non-marine ostracods is unclear. This study quantified the fecundity of females taken from a presumed fully sexual Eucypris virens population that were experimentally combined with different proportions of males (male : female sex ratios: 1 : 1, 1 : 2, 1 : 4, 1 : 8 and 0 : 1)....
Article
Afrocypris barnardi G. O. Sars, 1924, a giant temporary pool ostracode from South Africa, is here redescribed, based on new material. It is only the second time that this species has been found. The present morphological analyses show that the copulatory appendages of both sexes have unusual characteristics. In the female, at least three paired app...
Book
Ostracods, small aquatic Crustacea, occur in almost every marine, brackish and freshwater habitat. Their calcified bivalved carapaces readily fossilize and their record in earth history is long, dense and diverse. Ostracod species are particularly useful as tools in marine and limnic (palaeo-) ecology, in (palaeo-) biogeography, and biostratigraphy...
Article
Full-text available
Two main palaeoenvironments are reconstructed for the Paratethyan deposits at Yalova (Turkey). The investigated sections show the typical lithologic composition of the Neogene of NW Turkey, however, the palaeoecological context was so far unknown and the stratigraphic differentiation was still outstanding. In this study, molluscs, ostracods and fis...
Article
Ostrakoden sind in aquatischen Habitaten häufig und weit verbreitet. Ihre fossilen Klappen können, wenn sie aus Sedimenten geborgen und untersucht werden, als Archive der Erdgeschichte dienen. Im Quartär werden sie erfolgreich für die Paläomilieuanalyse in der Paläolimnologie, -ozeanografie und –klimatologie verwendet. Auch in der Umweltgeologie la...
Article
Full-text available
The giant ostracod, Liocypris grandis, found in South African temporary pools, has five pairs of additional appendage-like structures, seemingly associated with the Female Reproductive Organ (FRO). Original investigations of these structures by light and scanning electron microscopy could not unequivocally determine whether or not these structures...
Article
Full-text available
Following an extended biostratigraphical and environmental study of Gastropoda, Pelecypoda, Ostracoda, Otoliths and other fish remains of the Neogene Kιlιç and Yalakdere Formations at Yalova (İzmit Province, Turkey), the present paper now fully documents the ostracods of these units resulting in the following taxonomical and palaeoecological interp...
Article
Full-text available
Fossil Cyclocypris diebeli Absolon, 19731. Absolon , A . 1973 . Ostracoden aus einigen Profilen spät- und postglazialer Karbonatablagerungen in Mitteleuropa, . Mitteilungen der Bayerischen Staatssammlung für Paläontologie und Historische Geologie , 13 : 47 – 94 . View all references from Europe are redescribed, utilizing material with chitinous pre...
Article
Six charophyte, 13 mollusc, four ostracod and nine fish otolith taxa are taxonomically described, and one fruit, one seed and two foraminiferal taxa are briefly noted from the Lower Cyrena Beds and the Lower Coloured Molasse of the Sindelsdorf section near Penzberg (approximately 50 km south of Munich). Our palaeoecological and lithological data fr...
Article
Full-text available
A new species of the ostracod genus Scottia Brady and Norman, 1889 from Kanazawa, western Honshu, Japan is described. This species is only the third living representative of this genus. It is most similar to the populations of S. pseudobrowniana Kempf, 1971 from western Europe, but it is smaller, and has unique features of the hemipenes, Zenker org...
Article
Smith, Robin J., Matzke-Karasz, Renate, Kamiya, Takahiro, Ikeda, Yoshinori (2002): Scottia birigida sp. nov. (Cypridoidea: Ostracoda) from western Honshu, Japan and a key to the subfamily Scottiinae Bronstein, 1947. Zootaxa 126: 1-20, DOI: 10.5281/zenodo.156019
Article
Full-text available
Fossil spermatozoa are recorded for the first time in freshwater ostracods (small bivalved crustaceans) from Holocene sediments at sites in the United Kingdom and Germany. Exceptional conditions at these sites have resulted in the preservation of chitinous "soft parts", including limbs, the remains of Zenker's Organs (sperm pumps that are part of t...
Article
Full-text available
Ostracods from carbonate deposits of the excavation site of a Neolithic marshland settlement near Unfriedshausen (Germany, Bavaria) (Age: 3539 to 3517 BC.) were examined. The two calcareous strata investigated, comprising a thickness of about 10 to 20 cm and situated directly below and above the culture horizon, are very rich in ostracod shells. In...
Article
Full-text available
Four species of the genus Leuciscus (Pisces, Teleostei, Cyprinidae) were examined: Leuciscus etilius from Miocene sediments from Etili-Can (Dardanelles, Turkey) and Leuciscus souffia agassizi, Leuciscus leuciscus and Leuciscus cephalus (Modern, southern Germany). Morphological comparisons support the original integration of L. etilius within the ge...
Article
It has been reported that vitamin A palmitate induces the production of cilia on the epidermal cells of the regenerating axolotl limb, and the formation of crevices in the epidermal surface. The aim of the present investigation was to reexamine under well defined conditions the potential of retinoids to evoke the above described metaplastic changes...

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