Pleurotrochopsis anebodica n.g., n.sp. (Rotatoria) aus Schweden

Ohne Zusammenfassung     

Dangeardiana eudorinae n.g. n.sp.-ein neuer Vertreter der Algenpilze

Zusammenfassung Der hier beschriebene neue Vertreter der Chytridiaceen lebt als Parasit auf der Oospore von Eudorina elegans. Der Thallus ist eukarpisch, monocentrisch und entwickelt sich intramatrikal und extracellular. Das Sporangium entwickelt ein verhältnismäßig langes Entleerungsröhrchen, was das charakteristischste Gattungsmerkmal dieses Pilzes darstellt. Die geschlechtliche Fortpflanzung verläuft in einem sehr frühen Entwicklungsstadium beider Gametangien. An dem Zoosporenrest des ganz jungen weiblichen Thallus befestigt sich eine männliche Zoospore, die sich dann mit einer Zellhülle überzieht. Nachher bildet sich zwischen den Hüllen der beiden Zoosporenreste ein echter Kopulationsschlauch, worauf die Plasmogamie und danach die Entwicklung einer Dauerspore folgt.     

Pachyteichopora n. g. (Bryoz. Cyclostomata) aus der oberen Kreide

The cyclostome Bryozoan speciesPustulopora verrucosa, described by Roemer 1840, is combined with two other congeneric species within the new genusPachyteichopora (type-speciesP. verrucosa [Roemer]). This new genus characterized by its extremely highly calcified external walls of the erect massive cylindrical and dichotomously branched zoaria possessing maculae. The similarity of its gonozooid to that ofLeiosoecia counts for its provisional attribution to the Fam. Leiosoeciidae Canu & Bassler (1920).P. bugei n. g. n. sp. from the French Coniacian andP. punctata n. g. n. sp. from the Swedish Campanian are described.     

Kultur und Entwicklung von Labyrinthula coenocystis n. sp.

Ohne ZusammenfassungMeinem hochverehrten Lehrer, Herrn Professor Dr. Dr. h. c. H. v. Guttenberg, zum 80. Geburtstag gewidmet.     

Gloeochrysis apyrenigera n. sp. und der Chromatophor vonPhaeodermatium

Zusammenfassung AlsGloeochrysis apyrenigera wird eine neue kaltstenotherme Chrysophycee beschrieben. — Der Chromatophor vonPhaeodermatium ist seitenständig und zeigt die auch für andere Chrysophyceen typische mittlere, beidseitige Einschnürung, die keine Teilungsstruktur ist.     

Ein dendroider Graptolith (Ophigraptus hercyniae n. g. n. sp.) von der Unter-/Mitteldevon-Grenze im Harz (Deutschland)

The graptoliteOphigraptus hercyniae n. g. n. sp. has a roughly bilaterally symmetrical, frond-shaped linear rhabdosome with a rounded-zigzag to meandering main stipe, and alternating, typically regularly arranged side-branches with one to three dichotomies.     

Radula und Fangarme beiMichelinoceras sp. aus dem Silur von Bolivien

New finds of michelinoceratid cephalopods from the Kirusillas-Shale (Ludlow/Silurian) of Ushpa-Ushpa in the Eastern Cordillera of the Bolivian Andes reveal parts of the radula and imprints of arms owing to extremely good preservation conditions. The imprints of soft parts point that the orthoce-rates had 10 arms, two of them shaped to long tentacles as recent coleoids have. Of more importance is the first proof of a michelinoceratid radula in situ. This is the first known ra-dula of lower palaeozoic cephalopods at all. TheMichelinoceras radula consisted of 7 teeth per row. So the radulae of michelinoceratid cephalopods are very similar to those of ammonites and coleoids. But there are great differences in the radula ofMichelinoceras sp. and that ofNautilus sp. All known radulae of fossil and recent cephalopods are compared and phylogenetic or systematic implications are discussed. The classification of the cephalopods into six subclasses as used in the “Treatise” turns out to be unnatural and should be given up. Finally ecological relations between the morphology of radula-elements and mode of life are dis-cussed. Size and number of radula teeth let suppose that thisMichelinoceras specimen must have been an adult individual living far off the coast in pelagic seas.     

Favreina peruviensis n. sp., ein Crustaceen-Mikrokoprolith aus dem lias von peru

From the Liassic of Peru a crustacean microcoprolite association comprisingParafavreina thoronetensis andFavreina peruviensis n. sp. is described. Due to the well preserved material it can be shown, that in cross-sectionParafavreina thoronetensis has both triangular and crescent-shaped canals.     

Cthulhu Macrofasciculumque n. g., n. sp. and Cthylla Microfasciculumque n. g., n. sp., a Newly Identified Lineage of Parabasalian Termite Symbionts

The parabasalian symbionts of lower termite hindgut communities are well-known for their large size and structural complexity. The most complex forms evolved multiple times independently from smaller and simpler flagellates, but we know little of the diversity of these small flagellates or their phylogenetic relationships to more complex lineages. To understand the true diversity of Parabasalia and how their unique cellular complexity arose, more data from smaller and simpler flagellates are needed. Here, we describe two new genera of small-to-intermediate size and complexity, represented by the type species Cthulhu macrofasciculumque and Cthylla microfasciculumque from Prorhinotermes simplex and Reticulitermes virginicus, respectively (both hosts confirmed by DNA barcoding). Both genera have a single anterior nucleus embeded in a robust protruding axostyle, and an anterior bundle flagella (and likely a single posterior flagellum) that emerge slightly subanteriorly and have a distinctive beat pattern. Cthulhu is relatively large and has a distinctive bundle of over 20 flagella whereas Cthylla is smaller, has only 5 anterior flagella and closely resembles several other parababsalian genera. Molecular phylogenies based on small subunit ribosomal RNA (SSU rRNA) show both genera are related to previously unidentified environmental sequences from other termites (possibly from members of the Tricercomitidae), which all branch as sisters to the Hexamastigitae. Altogether, Cthulhu likely represents another independent origin of relatively high cellular complexity within parabasalia, and points to the need for molecular characterization of other key taxa, such as Tricercomitus.     

Oenothorachona ectenolaemus n.g., n.sp. and Spirochona halophila n.sp., Two New Marine Chonotrichous Ciliates

SYNOPSIS. Two new species of chonotrichous ciliates, Oenophorachona ectenolaemus n.g., n.sp. and Spirochona halophila n.sp. were found on Anisogammarus sp. collected from the waters of Humboldt County, California and Argyle Bay, San Juan Island, Washington. This is the 1st reported occurrence of 2 genera of chonotrichous ciliates on a single host species as well as the 1st of the occurrence of Spirochona in marine and brackish water environments.     

Parauronema virginianum n. g., n. sp., a Marine Hymenostome Ciliate

SYNOPSIS. Parauronema virginianum n. g., n. sp., a marine hymenostome ciliate is described from the Virginia coast. Structural studies were made on specimens treated with the Chatton-Lwoff silver impregnation technic and on animals observed with the phase microscope. Particular attention was given to the buccal ciliature and its importance to generic assignment in the order Hymenostomatida.     

Two amphistomes,Lobatodiscus australiensis n.g., n.sp. and Elseyatrema microacetabularis n.g., n.sp., from the Australian turtle Elseya dentata (Gray)

Summary Lobatodiscus australiensis n.g., n.sp. (family and subfamily uncertain) and Elseyatrema microacetabularis n.g., n.sp. (family Paramphistomidae, subfamily Dadaytrematinae?), from the intestine of the freshwater turtle Elseya dentata (Gray) in Queensland, Australia, are described. Lobatodiscus has a large lobed acetabulum, small oral diverticula which do not protrude out of the oral sucker, two pairs of lymph vessels and no oesophageal bulb. Elseyatrema has a small acetabulum, large protruding oral diverticula, an oesophageal bulb, juxtaposed testes, one pair of rudimentary lymph vessels and no cirrus-sac. ac]19830626