Rhizochrysidopsis vorax,n. gen., n. sp.

Zusammenfassung Die Art ist durch eine bedeutende Variation der Zellgröße, damit auch des Chromatophors und des Kerns ausgezeichnet. Mit steigender Zellgröße nimmt die Zahl der kontraktilen Vakuolen von zwei auf mindestens acht zu. — Unter Umständen erfolgt exzessive animalische Ernährung; es werden auch im Vergleich zum Zellkörper sehr große Algenzellen aufgenommen und verdaut.     

Gloeococcus bavaricus n. sp. undCoelastrella compacta n. sp.

Ohne Zusammenfassung     

Tylenchocriconema alleni n. g., n. sp. from Guatemala (Tylenchocriconematidae n. fam.; Tylenchocriconematidae n. superfam.; Nematoda)

Tylenchocriconema alleni n.g.n.sp, is described from soil about roots of a bromeliad from Guatemala City, Guatemala. It has characteristics of both the Tylenchoidea and Criconematoidea. Tylenchocriconematidae, n. fam., and Tylenchocriconematoidea, n. superfam., are proposed to express the relationship of this species to other taxa. Tylenchulidae and Paratylenchidae are considered closely related, and Tylenchulidoidea, n. rank, is proposed to indicate their relationship.     

Monopylocystis visvesvarai n. gen., n. sp. and Sawyeria marylandensis n. gen., n. sp.: two new amitochondrial heterolobosean amoebae from anoxic environments

Two new species of heterolobosean amoebae from anoxic environments, Monopylocystis visvesvarai and Sawyeria marylandensis, are described on the basis of light microscopy, electron microscopy, and their phylogenetic affiliation based on analyses of nuclear small-subunit ribosomal RNA gene sequences. Both species lack mitochondria but have organelles provisionally interpreted as hydrogenosomes, and neither can tolerate aerobic conditions. As their conditions of culture do not exclude all oxygen, they may be microaerophiles rather than strict anaerobes. Both species have unusual nucleolar morphologies. Monopylocystis visvesvarai, from a marine sediment, has nucleolar material distributed around the nuclear periphery. It is the first non-aerobic heterolobosean protist for which a cyst is known; the cyst is unmineralized and unornamented except for a single, raised, plugged pore. Sawyeria marylandensis, from an iron-rich freshwater stream, has nucleolar material distributed in one or two parietal masses, which persist during mitosis. In phylogenetic analyses of small-subunit rRNA gene sequences, Monopylocystis visvesvarai, Sawyeria marylandensis and Psalteriomonas lanterna converge to form a single clade of non-aerobic (anaerobic/microaerophilic) heteroloboseans.     

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.     

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.     

Fossil onychophorans from Dominican and Baltic amber: Tertiapatus dominicanus n.g., n.sp. (Tertiapatidae n.fam.) and Succinipatopsis balticus n.g., n.sp. (Succinipatopsidae n.fam.) with a proposed classification of the subphylum Onychophora

Abstract. Tertiapatus dominicanus n.g., n.sp. (Tertiapatidae n.fam.) and Succinipatopsis balticus n.gen., n.sp. (Succinipatopsidae n.fam.) (Lobopodia: Onychophora), the first Tertiary fossils of the Lobopodia, are described from Dominican and Baltic amber, respectively. Both families are characterized by the presence of simple legs lacking foot portions with claws and pads. Tertiapatidae is further characterized by soluble body pigments and oral papillae shorter than the legs. Succinipatopsidae is characterized by non-soluble body pigments and oral papillae longer than the legs. Nomenclatural changes include the erection of the class Udeonychophora n. nom. for terrestrial onychophorans with a ventral mouth, the order Ontonychophora n.nom. for extant onychophorans possessing legs with a differentiated "foot" portion, and the family Helenodoridae n.nom. for the genus Helenodora from the Carboniferous. The biogeographical significance of these fossils and their phylogenetic relationship with previously described onychophorans are discussed.     

Eimeria lemuris n. sp., E. galago n. sp. and E. otolicni n. sp. from a Galago Galago senegalensis

SYNOPSIS. Three new species of Eimeria are described from the intestinal contents of a galago Galago senegalensis E. Geoff. imported into the Amsterdam Zoo from Africa. The oocysts of E. lemuris n.sp. are 44-57 by 38-47 μ and contain 4 sporocysts measuring 17-20 by 10.5–14 μ. The oocysts of E. galago n.sp. are 20-25 by 19-23 μ and contain 4 sporocysts measuring 9-12 by 6-9 μ. The oocysts of E. otolicni n.sp. are 23-31 by 22-28 μ and contain 4 sporocysts measuring 10-15 by 8-12 μ. A few Isospora resembling I. arctopitheci Rodhain, 1933 were seen.     

Two newCandida species:Candida chilensis sp.n. andCandida valdiviana sp.n.

Two new nitrate-assimilating yeasts isolated from decomposed wood ofNothofagus sp. are described. The namesCandida chilensis andCandida valdiviana are proposed.A table is given of the assimilation and fermentation reactions of the currently acceptedCandida species that use nitrate as the sole source of nitrogen.Candida koshuensis was not validly described so the nameCandida boidinii must be accepted for this species.The work done at the Universidad Austral de Chile had financial support of the Comisión Nacional de Investigatión Científica y Technológica (Proyecto No. 151).     

Actiniscus canadensis n. sp., A. pentasterias Ehrenberg v. arcticus n. var., Pseudoactiniscus apentasterias n. gen., n. sp., Marine Relicts in Canadian Arctic Lakes

SYNOPSIS. The family Actiniscaceae Kützing, 1845, (generally placed in the dinoflagellates) includes species derived from Actiniscus pentasterias Schütt, some of which became lacustrine relicts. A. pentasterias v. arcticus. living in Arctic and Altantic waters, differs from the Mediterranean species in having a greater number of siliceous skeletons (pentasters). Advanced atrophy of pentasters in lacustrine A. canadensis , and absence of such structures in Pseudoactiniscus apentasterias , probably results from decreased salinity and an undetermined ecologic factor. Morphogenesis and physiologic transformation of past euryhaline Actiniscaceae into contemporary limnobionts began, presumably, during the prelimnic phase of Great Bear Lake and Keyhole Lake. Arctic Actiniscus which exist under subzero temperatures and endure 10-month-long winters, appear to satisfy their energy requirements by heterotrophy and frequent phagocytosis. Survival of lacustrine Actiniscus species in both Arctic lakes seems possible because of lack of competition from co-existing phytoplankton organisms which can endure extreme dystrophic conditions.     

Torulopsis bombicola sp. n.

A new yeast species,Torulopsis bombicola, is described, that produces extracellular hydroxy fatty acid sophorosides. It utilizes relatively few carbon compounds. It forms a mannan having a proton magnetic resonance spectrum similar to the spectra of the galactomannans ofTorulopsis apis, Torulopsis nodaensis andT. magnoliae, but differing from those ofT. gropengiesseri galactomannan andT. apicola mannan.Issued as N.R.C.C. No. 11234.The authors wish to thank Mr. M. Mazurek for the determination of the p.m.r. spectra, and Mr. N. R. Gardner and Mr. R. J. Magus for valuable technical assistance.     

Endomycopsis montevidensis n. sp.

A new species of the genusEndomycopsis is proposed. It was isolated from waste water, at Montevideo-Uruguay.By its morphological and biochemical proprieties it differs from allEndomycopsis previously described.

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Este trabajo fue desarrollado en el Laboratorio de Micologia de la Facultad de Química de Montevideo, Uruguay y en uso de una beca de la Universidad Federal de Pernambuco para perfecciobamiento en el estudio de las levaduras.     

Endomycopsis montevidensis n. sp.

A new species of the genusEndomycopsis is proposed. It was isolated from wast water, at Montevideo-Uruguay.By its morphological and biochemical proprieties it differs from allEndomycopsis previously described.Este trabajo fue desarrollado en el Laboratorio de Micologia de la Facultad de Quimica de Montevideo, Uruguay y en uso de una beca de la Universidad Federal de Pernambuco para perfeccio bamiento en el estudo de las levaduras.     

Mycoderma Lafarii n. sp.

Ohne Zusammenfassung