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The authors describe Adpiasus riegeri sp. nov. (Insecta, Heteroptera, Miridae, Mirini), a new species of the genus from French Guyana. It is compared with the three existing species of the genus Adpiasus Carvalo & Schaffner, 1973, A. punctatus Carvalho & Schaffner, 1973, and A. mayanus Carvalho & Schaffner, 1973, from Mexico, as well as A. ecuadorianus Carvalho &
Carpintero, 1986, from Ecuador. The characteristic features of the new species are described in detail and illustrated by photographs. Adpiasus mayanus is recorded for the frst time from French Guyana.
Additional information on the distribution of eleven species of stilt bugs (Heteroptera, Berytidae) from the Afrotropical region is reported and discussed with respect to the major biomes of Africa. For some species, remarks on ecology, identifcation and taxonomy are included. New country records are indicated for Gampsoacantha pumilio, Gampsocoris africanus cornutus, Micrometacanthus trichoferus, Cametanthus madagascariensis, Metacanthus microphthalmus, M. mollis, M. nitidus,
Neostusakia picticornis and Yemma gracilis.
An inclusion in Miocene Dominican amber contained a well preserved velvety shore bug (Ochteridae), Riegerochterus baehri gen. nov., spec. nov., which is described and figured in this article. This is the first fossil representative of the family recorded from Cenozoic, as all previously described taxa are much older, e.g. from the Early Jurassic of England and the Late Jurassic-Early Cretaceous of China. It is distinguished from all extant genera of Ochteridae by several distinct characters that are shortly discussed. Figures and photos of representatives of fossil (Riegerochterus) and recent (Megochterus, Ochterus and Ocyochterus) genera are provided.
Erysiphe platani
(2012)
This work deals in two sections with the North American plane powdery mildew Erysiphe platani, an epidemiological study and a molecular phylogenetic analysis based on rDNA ITS sequence data. Most likely, the species was introduced in South Europe at the beginning of the 1960s. In 2007, it was observed for the frst time in Germany near Freiburg (SW Germany) and obviously did not reach other German states until 2009. A detailed monitoring from 2009 to 2011 shows that the fungus continually spread north- and northeastward with a speed of roughly 190 km/year. The northernmost record is from Arendsee in the north of Sachsen-Anhalt from 2011. We assume that the species has come from the Rhone valley and the Burgundian Gate fnally entering Germany in the Upper Rhine plain. The molecular phylogenetic analyses of material of different geographic origins indicate that specimens from Germany and Italy are identical, differ slightly from those from Greece and strongly from extraeuropean (Australia, USA) material. This might indicate a considerable rate of mutation of this powdery mildew with North American origin in the new European area. In addition, the phylogenetic analyses confrm that E. platani is related to other tree-inhabiting powdery mildew species previously accommodated in the genus Microsphaera.
The new genus and species Deltopyxis triangulispora is described. It is so far known from 14 sites in the south of Luxembourg and one in the neighbouring region of France. The discomycete forms very small, blackish-brown apothecia on bark, more rarely on wood, but particularly on more or less strongly senescent hymenia of Vuilleminia spp. The apothecia occur on dead, corticated, internally very slightly to rather strongly white-rotten, attached or broken, periodically dry branches at a height of about 1–3 m above ground. In most of the collections Vuilleminia was present and covered the
bast on one side of the branch, while the periderm still covered the remaining areas. D. triangulispora is so far recorded on angiosperm shrubs of the genera Corylus, Crataegus, Ilex, Prunus, and Salix, which had an advanced age or were already dead. The species prefers undisturbed, usually thermophilous hedges or open woodlands, especially close to their edges, but sometimes occurs also in dense, more air-humid woods. The fungus is characterized by 64-spored, elongate saccate, short-stalked, inamyloid, rather thin-walled asci which arise from croziers and open at the apex by a broad slit-like pore. The hyaline ascospores have a distinctly triangular shape when seen in profile view, but look slightly flattened, (ellipsoid-)deltoid in front view. In the living ascus they are arranged in a dense elongate cluster, which is forcibly discharged as one entity.
The position of Deltopyxis within the Ascomycota is unknown.
„Semper Apertus“
(2012)
On 5 August 1947, two years after the occupying American army had shut it down, the University of Heidelberg recognized Prälat Hermann Ludwig Maas (1877–1970) on his seventieth birthday with a doctorate honoris causa. The document which the Rektor, Prof. Hans Freiherr von Campenhausen, presented to Maas supported the honor with half a dozen reasons why he was worthy of the title Doktor, but the laudatio made no mention of the university’s debt to Hermann Maas that arose in the summer of 1945. Years later, when Maas was a walking, living legend in his own city, the popular press remembered that Maas and members of the Theological Faculty taught uninterruptedly during the Summer Semester of 1945 while other faculties
slumbered. Maas and his colleagues helped the university live up to its heralded motto: semper apertus.
In the upper Danube river-system, but also in some more watercourses of the German lower mountains range, an endolithic filamentous cyanobacterium is a prominent compound of the phytobenthos. These filaments penetrate limestones in the river bed and form brush-like endolithic layers of about 0.5 mm in depth. There are similarities between this taxon and approximately 10 other filamentous Cyanophyceae in terms of the width of the trichomes, the geometry of the cells and the shape of the apical cells. However, none of these species allow for a direct and clear-cut identification, and a precise taxonomic determination has therefore been unresolved until today. In order to make progress in this matter, it is necessary to get a better insight into the boring behaviour of this inhabitant and into the endolithic arrangements of the filaments. For
this purpose, special preparation methods and SEM examinations were applied. The results of these procedures as well as critical comparisons with taxonomic properties of similar phormidian taxa, and the special demands on physico-chemical water conditions, led to the conclusion that the taxon in question cannot be assigned to a known species, but must be considered as an independant species. It is here described as Phormidium ingrediens species nova.