Burkhard Scharf

Preliminary paleolimnological study of rocha lagoon, SE Uruguay

Abstract Physical, chemical and biological data from a sedimentary profile of Rocha lagoon (Uruguay) are presented. Analyses of silica remains showed that opal phytoliths, diatoms, sponge spicules and chrysophyte cysts were the most important contributors to biogenic silica. Organic matter, total nitrogen and total phosphorus were used to infer past trophic development. Physical analysis of sediments allowed us to identify five lithological units related to sea level variation and climatic events.

New and little known ostracods of the genus Heterocypris (crustacea, ostracoda) from the Balkan Peninsula

Abstract Two new species of Heterocypris , a bisexual population of H. bosniaca and a parthenogenetic population of H. gevgelica , are described from Bosnia. While H. bosniaca seems to be fully isolated, H. gevgelica has close links to H. exigua Gauthier . Additional descriptions of H. vitrea Sywula , H. bulgarica Sywula , H. salina ( Brady ), H. fretensis Brady and Robertson , H. inequivalvis Bronstein , and H. maura Masi are given. The latter three are thought to be congeneric with H. salina by several authors. Molecular genetical investigations are suggested to solve this problem.

New and little known species of the genus Candona (Crustacea, Ostracoda) from Macedonia and other Balkan areas

Abstract Morphological and taxonomical investigations on species of the genus Candona s.str. Baird , 1845 from the Balkan Peninsula were performed. According to the number of bristles at the second joint of their mandibular palpi they are divided into the candida -group with five bristles and the neglecta -group with only four ( Klie 1938 ; Meisch 1996 ). A splitting of the neglecta -group into three species complexes, depending on the shape of the middle process (M-process) of the hemipenis is proposed. Different species of Candona are examined and an especially detailed description of Candona bimucronata Klie 1937 is provided in order to prevent future false classifications. A description of Candona paloskii n.sp., Candona dalmatina n.sp. and the so far unknown female of C. natronophila Petkovski , 1969 is given.

An updated checklist of the Recent non-marine Ostracoda (Crustacea) of Iran, with a redescription of Eucypris mareotica (Fischer, 1855)

An updated checklist of the extant non-marine Ostracoda of Iran, with 74 species in all, is presented, based on literature and new collections made in May 2011. The occurrence of 19 non-marine ostracod species recovered from 10 localities in May 21-26, 2011 is reported together with ecological data. Eucypris kerkyrensis Stephanides, 1937, Ilyocypris inermis Kaufmann, 1900, Psychrodromus fontinalis Wolf, 1920, and P. olivaceus (Brady & Norman, 1889) are new to the fauna of Iran. Eucypris mareotica (Fischer, 1855) is redescribed and its taxonomic position is discussed. It is shown that E. mareotica-synonymous with E. inflata-does not belong to the genus Eucypris sensu stricto, and even not to the subfamily Eucypridinae; as its characters do not fit any available genus, the species is therefore provisionally left in the genus Eucypris at present. Eucypris mongolica (Daday, 1909) is proposed to be considered an infraspecific variety of E. mareotica. The following new combination is here proposed: Strandesia ambigua (Ghetti, 1972) nov. comb.

New methods for collecting Ostracoda (Crustacea) in stony sediments with methodological remarks on the separation of ostracods from sediment

New methods for sampling ostracods are described specifically for hyporheic environments and coarse sediments (i.e., pebbles and rocks). The main module is a diaphragm pump that establishes an artificial current strong enough to force individuals from their habitat. Two other methods are presented for separating living ostracods from sediment samples taking advantage of their biological and physical properties: (1) emigration out of a basket; (2) harvesting ostracods floating on the water surface.

Living Ostracoda (Crustacea) from the town moat of Bremen, Germany

Between 2009 and 2014 we collected 23 ostracod species in the historical town moat of Bremen, Germany. Today, the moat is part of an urban park, separated into six basins by various bridges. Brackish water, pumped from the Weser River into the moat, regulates the water level and is the main factor controlling the various physical and chemical parameters of the basins. Brackish water ostracod species originate from this artificial inflow, but only a minority of these species establishes stable populations. The Bremen moat ostracod assemblages are compared with the moat of Greifswald. The different environmental setting (e.g., water current) and the number of studied localities can explain the differences in the occurrence of ostracods in these two localities.

Arctocypris fuhrmanni , n. gen., n. sp. (Crustacea, Ostracoda, Eucypridinae) from Spitsbergen (Norway)

Material from Spitsbergen (Norway) collected by Spitzenberger (1996) was reinvestigated. A new genus Arctocypris and a new species Arctocypris. fuhrmanni n. gen. n. sp. are described in the present paper. A key to the genera of the subfamily Eucypridinae is provided. At the moment Arctocypris n. gen. comprises four species: Arctocypris arctica (Olofsson, 1918) comb. nov.; A. dulcifons (Diebel & Pietrzeniuk, 1969) comb. nov.; A. foveata (Delorme, 1968) comb. nov. and Arctocypris fuhrmanni n. gen., n. sp.