Nubidites omarai n. g. n. sp., ein neuer ammonit aus dem nubischen sandstein Ägyptens

A loose ammonite from the Nubian Sandstone near Abu Darag, Eastern Desert, Egypt, is described asNubidites omarai n. g. n. sp. Since ammonites from the Nubian Sandstone (Carboniferous to Cretaceous) are extremely rare, the new form is of great importance. The specimen has been found in a Carboniferous section of the Sandstone, but since Jurassic and Cretaceous outcrops occur in the neighbourhood, also these ages have to be considered. An Upper Cretaceous age of the new genus, however, is suggested.     

Syllis onkylochaeta sp. n., ein korallenfressender Polychaet (Syllidae) aus dem Korallenaquarium des Löbbecke-Museums

A new species of the genusSyllis is described feeding on a colony of corals of the genusXenia (Xeniidae, Alcyonaria) in the coral aquarium of the Löbbecke Museum Düsseldorf. The origin of the corals is very probably Bali (Indonesia).     

Eolimna martinii n. gen., n. sp. (Bacillariophyceae) aus dem Unter-Oligozän von Sieblos/Rhön im Vergleich mit ähnlichen rezenten Taxa

The laminated sediments of the Lower Oligocene ‘Sieblos-Schichten’ (dysodile and kieselgur-sediments) contain many individuals of a naviculoid diatom species. Formerly this group of diatoms would have been classified without doubt as Navicula (section ‘Minusculae’). After splitting this extremely heterogeneous genus in Navicula sensu stricto and some other homogeneous genera, the pattern of structures of this fossil species does not correspond to any established genus. For that reason this form will be described as the generotype of a new genus Eolimna. Furthermore it became evident that some Recent species (assigned to Navicula) show the same pattern of structures as the new genus Eolimna (generotype: E. martinii) which represents one of the first naviculoid diatoms of limnic origin. The essential criteria of this genus are: comparatively small cells with narrow girdle; simple alveolated rib system; areolae with a hymen in approximately medium position between relatively large sized foramina outside and inside of the valve; a single row of more or less irregular arranged areolae in close position to each other, on one or several of the copulae. The differences to supposed related genera are discussed.     

Kroemmelbeinia n. g., eine neue Ostracoden-Gattung aus dem marinen oberpliozän der Insel Kos (Griechenland)

Among the cytherine ostracodes possessing caudal process a new genusKroemmelbeinia is defined by its hinge-element. In its habitus, and its structure particularly the punctate surface and the inner lamella the new genusKroemmelbeinia resembles the genusMicrocytherura G. W. Müller, but which possesses smaller valves. The characteristic hinge-elementsof Kroemmelbeinia are: both terminal teeth in the left valve crenulate, interior with 5–6 terminal teeth in the left valve crenulate, interior with 5–6 toothlets, and posterior with 6–7 connected by a narrow and finely crenulate groove. By this hinge-constructionKroemmelbeinia differs fromMicrocytherura (Tetracytherura) Ruggieri 1952 and also from other genera(Cytheropteron, Perissocytheridea) of similar outline.     

Pentaporella rhaetica n. g. n. sp., eine neue Kalkalge (Dasycladaceae) aus dem oberrhätischen Gruber- Riff (Hintersee/Salzburg)

A new dasycladacean alga,Pentaporella rhaetica n. g. n. sp., is described from the “Upper Rhaetian“ or “Rhaetoliassic“ Reef Limestones of Gruber-reef (Hintersee/Salzburg).     

Neue Erkenntnisse zu mikromorphen Gastropoden aus Sötenich (Givetium,Mittel-Devon)

New data of well preserved Givetian micromorph gastropod species from the quarry ?Am Wachtberg“ near Sötenich (Eifel, West Germany) are presented(Lukesispira frydai, Kirchneriella striata, Murchisonia angulata, Murchisonia sp.,?Archaeosphera minima, Kallispira latostriata, Nerrhena aequistriata, Nerrhena reticulata). Three new species(Devonozyga bandeli, Cookiloxa leunisseni, Soetenichia wachtbergensis) are described and figured. A typical protoconch for vetigastropods is proven forDevonozyga.     

Ischnochiton marloffsteinensis n. sp., eine Polyplacophore aus dem fränkischen Lias

A nearly complete preserved chiton is desribed first time from the Jurassic of Southern Germany. Two specimens of this new species have been found from the Middle Liassic (late Pliensbachian, gibbosus subzone) of Marloffstein near Erlangen/Franconia. The early existence ofIschnochiton which was known until now since Paleocene let this genus appear as a probable ancestor of the modern familiy Ischnochitonina. Kurzfassung: Erstmalig wird aus dem süddeutschen Jura eine annähernd vollständige Käferschnecke beschrieben. Die neue Art ist durch zwei Exemplare aus dem oberen Pliensbachium (gibbosus-Subzone) von Marloffstein bei Erlangen/Franken belegt. Der dadurch gelungene stratigraphisch frühe Nachweis der GattungIschnochiton, die bisher nur seit dem Paleozän bekannt war, läßt diese Gattung möglicherweise als Stammgruppe der modernen Ischnochitonina erscheinen.     

Rhenanoperca minuta nov. gen., nov. sp., ein neuer Percoide (Pisces,Perciformes) aus der Messel-Formation (Mittel-Eozän,Unteres Geiseltalium)

A new genus and species of percoid fishes (Pisces, Perciformes) from the Middle-Eocene Messel-Formation is introduced and delimitated from other palaeogene percoids. A preliminary diagnosis is proposed. As the relationships of this new taxon still remain somewhat imprecise, it is provisionally classified as “Percoidei incertae familiae”.     

Somaspidion hammapberon n.gen. n.sp. — ein Arachnide aus dem Oberkarbon der subvaristischen Saumsenke NW Deutschlands

A well preserved trigonotarbid abdomen, species-type of a new genus within the Eophryninae Karsch 1882 is described from the upper Horster Schichten (Westfalian B) of the Ruhr basin. This fossil can be taken as an additional example for the distribution and decline of early terrestrial evertebrate populations.     

Miosira rhoenana n. gen. n. sp. (Bacillariophyceae) aus miozänen limnischen Sedimenten der Rhön im Vergleich mit anderen zentrischen Diatomeen

A mass occurrence of peculiar centric diatoms was found in a freshwater diatomite included in Miocene deposits of the Rhoen mountains in Central Germany. Similar forms were determined asMelosira jouseana in the literature. However, detailed observations in the LM and SEM exhibit morphologic characteristics which are completely unknown inMelosira and inAulacoseira. Regular triangulate and trilobate outlines of the valve faces occur and dominate besides circular ones. Variable support partitions and pillars are inserted between discus and Ringleiste. Such stabilizing elements are lacking in all comparable recent and known fossil genera. Instead of the extensive cingulum inAulacoseira the cells possess only a single copula which encloses the very short collum. A structure (l“fringe-curtain“) starting from the distal margin of this copula covers like a grid the mantle of the associated valve. Sulcus and pseudosulcus do not occur and rimoportulae or fultoportulae were not observed. Therefore a new genus is introduced with a new species,Miosira rhoenana. Miosira jouseana in the new combination is based onMelosira jouseana Moiseeva 1971.     

Buschmannia roeringi n. gen., n. sp. (Archaeocyatha) aus der Nama-Gruppe Südwestafrikas

From the Buschmann-Klippe-Formation, mainly considered as Late Precambrian in age until now, the ArchaeocyathaBuschmannia roeringi, n. gen., n. sp. is described. Based on this discovery, an Early Cambrian age for the Nama-group is assumed.