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Cyclocypris diebeli Absolon, 1973 (Ostracoda, Crustacea), extinct in Europe, extant in Japan
Journal of Natural History
Abstract and Figures
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 preservation of the appendages and carapace. These are compared with living C. diebeli from Kushiro Marsh, Hokkaido, Japan, representing the first living population of this species ever found. The fossil material is associated with strongly calcareous sediments, whereas the living material is found in weakly calcareous to acidic waters. Reasons for the different ecological requirements are discussed. Detailed study of soft parts of both living and fossil material using SEM is compared with other Cyclocypris species and it is shown that C. diebeli is more closely related to the North American Cyclocypris cruciata Furtos, 193510.
Furtos , N. C . 1935 . Fresh-water Ostracoda from Massachusetts, . Journal of the Washington Academy of Sciences , 25 : 530 – 544 . View all references than to any European congeneric species. Furthermore, the comparison with other Cyclocypris species with left>right valve overlap results in the conclusion that the subgenus Laevicypris Krstić, 199522.
Krstić N 1995 A new Cyclocypris subgenus—Laevicypris, in J. Ríha (ed.) Ostracoda and Biostratigraphy. Proceedings of the 12th International Symposium on Ostracoda (Rotterdam: A. Balkema), pp. 37–42 View all references is not a useful division of the genus.
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... This seta is located close to the a-setae. A similar seta, which could be identical to this additional seta was also reported in some other cyclocypridinid representatives, such as Cyclocypris diebeli (Matzke-Karasz et al. 2004), Cypria konishii (Smith & Kamiya 2006) and Physocypria bullata (Karanovic 2011). This seta could be the c-seta as illustrated in Karanovic's guide (Karanovic 2012). ...
... Although this point of view was rejected (e.g. Matzke-Karasz et al. 2004), it was followed by some researchers (e.g. Külköylüoğlu 2008). ...
A new genus, Dentocypria n. gen., in the subfamily Cyclocypridinae Kaufmann, 1900 is described from Thailand. The main distinguishing characters of the new genus are the presence of an internal tooth on the antero-ventral part of the left valve, the marginal tubercles on the right valve, the very elongated terminal segment of the madibular palp, the absence of setae on the basal segment of the second thoracopod (T2), the unusually long e-seta of T2, the short terminal segment of the third thoracopod (T3), the long Sp seta of the caudal ramus and the morphology of prehensile palps and hemipenis. Four new species of the new genus are here described: Dentocypria mesquitai n. gen. n. sp., Dentocypria chantaranothaii n. gen. n. sp., Dentocypria smithi n. gen. n. sp. and Dentocypria aequiloba n. gen. n. sp. A brief discussion on the generic characters and a key to the genera of the subfamily are provided.
... the presence of living specimens of Potamocypris acuminata in Japan is unexpected as previously this species was only known as a fossil from interglacial deposits of the Middle Pleistocene of Germany (Fuhrmann & Goth 2011). however, this is not the first time that a non-marine ostracod species extinct in europe has been found living in Japan; Cyclocypris diebeli, first described as a (sub-) fossil in europe, was later found living in hokkaido, northern Japan (Matzke-karasz et al. 2004). German fossils of P. acuminata are reported to all be female, whereas Japanese specimens consist of both males and females. ...
Samples obtained from pet shops and a hobbyist’s aquaria in Japan have revealed a diverse non-marine ostracod fauna, consisting of 19 species, all contaminants of aquaria stocked with exotic fish, shrimps and/or aquatic plants. Of these, six are newly recorded for Japan, including two new species, belonging to the genera Pseudostrandesia and Tanycypris. Pseudostrandesia tenebrarum Smith & Ozawa, 2021, previously suspected to be an alien species in Japan, was again found in pet shops in this study. We also report living specimens of Potamocypris acuminata Fuhrmann & Goth, 2011, a species previously only known from Pleistocene deposits of Germany. The six new records for Japan reported herein are likely alien species as evidenced by previous records or congeneric species, with origins in East Asia, South East Asia, and the Americas. Thus, there are now seven ostracod species recognized as probable alien hitchhikers in the Japanese pet trade. This study highlights that the pet trade is a viable route for hitchhiking ostracod species to enter Japan, and such species have the potential to become invasive.
... It only takes a very low intensity magnetic field to effect on chemical reactions and these reactions have a definite biological effect on the body [8]. This results agreement with [9]. When whom investigates utilizing material with chitinous preservation of the appendages and carapace. ...
The Magneototron technique considers as recent and advanced techniques in magnetic water treatment, which application in different; ecological, agricultures, industrial, medical and scientific fields. Therefore this study making to determine the effects of Magnetotron system with different intensities 0.05,0.10 and 0.15 Tesla on some biological aspects for one species of freshwater Ostracoda cyprislaevis O.F. Müller, 1776 for economical important, because both juveniles and adults of fishes feeding on it and as a tool for water cleaning, which consideration feeding on dead and decay animals and vegetables The samples of Ostracoda were collected from Al-Jaesh canal- Baghdad province for period from 1/9/2012 to 1/11/2012.The obtained results compared with this species of Ostracoda which lived in raw water (unexposed to magnetotron system).The present study demonstrated increased significance the rates of growth by increased the bivalve carapace dimensions (length and width) for both ostracodean males and females with increased intensity of magnetotron system comparative with untreated water. Although increase significant observed in fecundity in ostracodean females by increase the number and diameter of eggs with increased intensity comported with untreated females. Also this study detected to predominant females upon males in both treated and untreated water with magnetotron system. Then the magnetotron system does not effect on heterogonous in sexual formation for this species in same ecosystem.
... Species with LV>RV were provisionally assigned to the subgenus laevicypris by Krstić (1995) while species with the opposite character state (RV>LV) were assigned to Cyclocypris. However, some authors (e.g., Matzke-Karasz 1995;Matzke-Karasz et al. 2004;Meisch et al. 2019) argue that these valve character states arose more than once during the diversification of the genus and are therefore not appropriate for assignment to phylogenetically meaningful subgenera. This implies that more characters are needed to define higher taxonomic (e.g., subgenus, genus, etc.) levels, but there are no rules about the appropriate number of characters used to define species or genera. ...
Between 2015 and 2017, 58 ostracod taxa were collected at 30 locations in 111 samples from the hyporheic zone of surface streams in Texas, U.S.A. Six new species (Bradleycypris foresteri n. sp., Bradleystrandesia macula n. sp., Pseudocandona lordi n. sp., Indocandona rusti n. sp., Stenocypris sancari n. sp., Cyclocypris dalyana n. sp.) are described based on carapace and soft body parts. Additionally, 17 species and two genera (Vestalenula and Indocandona) are presented as new records for Texas, and Indocandona rusti n. sp. is the first record of the genus outside India. Taxonomic positions of the new species are discussed along with ecological information. One-hundred and six nonmarine ostracod species are now reported from Texas. However, ongoing studies suggest that actual species richness is much higher.
... Kempf and Scharf (1980) reported an almost intact chitinous internal structure of a Zenker organ (sperm pump) found inside the carapace of Candonopsis kingsleii (Brady and Robertson, 1870), collected from submodern deposits in Lake Laach, Germany. This was followed by other European freshwater examples, including over 70 specimens found in Holocene lake sediments in the UK, and numerous more from a Neolithic marshland settlement in Germany (Matzke-Karasz et al., 2001, 2004Mayr et al., 2014), suggesting that in the right conditions soft part preservation in Quaternary deposits may not be so rare. Eleven species were found with soft tissue preservation, and in addition to appendages and Zenker organs, spermatozoa are also preserved, the first report for fossil ostracods. ...
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 Ordovician through to the Holocene, and are from a wide range of paleoenvironments, including the seas, brackish inlets, lakes, caves, and the edges of ancient forests. Preservation includes silica, phosphate, goethite, pyrite or calcite mineralization replacing or coating soft parts, or direct preservation of the chitinous body and appendages, such as with amber entombment and mummification. Although rare, they have provided information on the morphology of some of the earliest ostracods, given clues about phylogenetic relationships of extinct groups, and demonstrated remarkably long periods of evolutionary stasis. Preserved sexual organs, eggs, brooded juveniles and even spermatozoa have given valuable insights into the reproduction of the group. Technological advances, such as scanning electron microscopy and more recently micro- and nanotomography, have dramatically expanded our capabilities to study these specimens, even down to the sub-cellular level. This review presents these occurrences in a historical context, from the first to the most recently reported, and highlights how these discoveries have contributed to our understanding of ostracod evolution.
... As pointed out previously by several authors (Pipik and Bodergat 2003;Matzke-Karasz et al. 2004;Külköylüoğlu 2008;Karanovic 2011Karanovic , 2012, better and more consistent taxonomic descriptions are needed to address several unanswered questions about the systematics of the subfamily Cyclocypridinae. This includes the need for additional and more consistent diagnostic taxonomic characters in the keys distinguishing between the subfamilies Candoninae and Cyclocypridinae. ...
A new ostracod genus and species, Namiotkocypria haysensis gen. et sp. nov., of the subfamily Cyclocypridinae is reported from an artesian well in San Marcos, Texas, USA. The new genus has several unique characteristics that distinguish it from all other genera in the subfamily, including postero-dorsally inclined valves, absence of tubercles in marginal zones of the valves, very short swimming setae on A2, length of aesthetasc ya on A1, asymmetric clasping organs, and differences in the shape of the hemipenis and other cheatotaxial parts. A detailed comparison among related genera of the subfamily is provided.
www.zoobank.org/urn:lsid:zoobank.org:pub:42FF41E3-E2FB-4BB6-B9F0-948ED0A0807A.
With 53 formally described species, the genus Cypretta is one of the most common freshwater ostracod genera in the world. It has a mainly circumtropical distribution. The type species, Cypretta tenuicauda (Vávra, 1895), was described from Zanzibar (Africa) in a superficial way. Therefore, the morphology and identity of this species and of the genus remained problematic until today. Here, we redescribe Cypretta tenuicauda from the original type material and discuss the morphology of the species and the diagnosis of the genus. The species is characterized by the presence of anterior marginal septa in both valves, the sub-triangular carapace shape in lateral view, the right valve overlapping the left valve, the generally wide carapace and the presence of a serrated posteroventral inner list in the right valve. In addition, both α and β setae on the mandibular palp are long and thin, claws Ga and Gp on the caudal ramus are elongated and seta-like, while the caudal ramus itself is equally slender. The caudal ramus attachment is reduced to a simple branch. The present redescription of the type species will assist in creating order in what is now a taxonomically confused genus.
Seven species of the family Candonidae Kaufmann, 1900 are reported from South Korea. Five species are described as new, all belonging to the subfamily Candoninae Kaufmann, 1900 and the tribe Candonini Kaufmann, 1900: Candona quasiakaina sp. nov., C. sillae sp. nov., Fabaeformiscandona koreana sp. nov., Typhlocypris choi sp. nov., and Schellencandona tea sp. nov. A very close resemblance between Candona sillae and the European C. improvisa Ostermeyer, 1937 prompted a redescription of the latter species based on the type material, and designation of the lectotype. One species of the tribe Candonopsini, Candonopsis transgrediens Brehm, 1923, previously known only from China, is reported from Korean freshwater habitats, and its first redescription is provided, along with a key to the world representatives of the genus Candonopsis Vávra, 1820. One species of the subfamily Paracypridinae, Dolerocypria mukaishimensis Okubo, 1980, previously known only from Japan, is redescribed from Korean brackish water habitats, and some notes on its variability are provided. A checklist of the Candonidae ostracods from East Asia is also provided, but only for those species that have been well-documented and taxonomically described.
A new species of the freshwater ostracod genus Metacypris is reported from Kushiro Marsh, Hokkaido, Japan. Two large posterior brood chambers in the females give this species a perfect heart shape in dorsal view. The male is characterized by a digit-shaped plate on each hemipenis. This is the second living species of Metacypris to be described; the other species, M. cordata Brady and Robertson, 1870, is restricted to Europe. Furthermore, this new species of Metacypris is only the second endemic freshwater cytheroidean species so far reported from Japan and the first record of the family Limnocytheridae in Japan.
The sexual dimorphism in the chaetotaxy of the antenna in various species of Sclerocypris is studied and described. Relying on larval morphology, a homology between the patterns in the two sexes is deduced and a suitable nomenclature for the apomorphic male condition is proposed. The differences observed are in all probability related to the function of the male antenna during copulation.
A new species of the freshwater ostracod genus Metacypris is reported from Kushiro Marsh, Hokkaido, Japan. Two large posterior brood chambers in the females give this species a perfect heart shape in dorsal view. The male is characterized by a digit-shaped plate on each hemipenis. This is the second living species of Metacypris to be described; the other species, M. cordata Brady and Robertson, 1870, is restricted to Europe. Furthermore, this new species of Metacypris is only the second endemic freshwater cytheroidean species so far reported from Japan and the first record of the family Limnocytheridae in Japan.