Maximilian P. Nesnidal

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We produced two new EST datasets of so far uncovered clades of ectoprocts to investigate the phylogenetic relationships within the lophophorate lineages, Ectoprocta, Brachiopoda and Phoronida. Maximum-likelihood analyses based on 78 ribosomal proteins of 62 metazoan taxa support the monophyly of Ectoprocta and a sister group relationship of Phylactolaemata(More)
Phylogenetic reconstructions may be hampered by multiple substitutions in nucleotide positions obliterating signal, a phenomenon called saturation. Traditionally, plotting ti/tv ratios against genetic distances has been used to reveal saturation by assessing when ti/tv stabilizes at 1. However, interpretation of results and assessment of comparability(More)
Within the complex metazoan phylogeny, the relationships of the three lophophorate lineages, ectoprocts, brachiopods and phoronids, are particularly elusive. To shed further light on this issue, we present phylogenomic analyses of 196 genes from 58 bilaterian taxa, paying particular attention to the influence of compositional heterogeneity. The phylogenetic(More)
Diurodrilidae is a taxon of Lophotrochozoa comprising about six, exclusively interstitial species, which are up to 500μm long and dorsoventrally flattened. Traditionally, Diurodrilidae had been regarded as an annelid family. However, recently Diurodrilidae had been excluded from Annelida and been placed in closer relationship to platyzoan taxa based on both(More)
Myxozoa are microscopic obligate endoparasites with complex live cycles. Representatives are Myxobolus cerebralis, the causative agent of whirling disease in salmonids, and the enigmatic "orphan worm" Buddenbrockia plumatellae parasitizing in Bryozoa. Originally, Myxozoa were classified as protists, but later several metazoan characteristics were reported.(More)
Compositional heterogeneity of sequences between taxa may cause systematic error in phylogenetic inference. The potential influence of such bias might be mitigated by strategies to reduce compositional heterogeneity in the data set or by phylogeny reconstruction methods that account for compositional heterogeneity. We adopted several of these strategies to(More)
The phylogenetic relationships of the lophophorate lineages, ectoprocts, brachiopods and phoronids, within Lophotrochozoa are still controversial. We sequenced an additional mitochondrial genome of the most species-rich lophophorate lineage, the ectoprocts. Although it is known that there are large differences in the nucleotide composition of mitochondrial(More)
For phylogenetic reconstructions, conflict in signal is a potential problem for tree reconstruction. For instance, molecular data from different cellular components, such as the mitochondrion and nucleus, may be inconsistent with each other. Mammalian studies provide one such case of conflict where mitochondrial data, which display compositional biases,(More)
A second-order diffraction grating placed below the active region of a phase-locked resonant antiguided array selects the in-phase array mode in addition to its role as a single-longitudinal-mode selector. This type of array-mode discrimination relies on the fact that the resonant in-phase array mode has significantly better field overlap with the grating(More)
We have developed a 3D numerical code supplied with a user-friendly interface for modeling active diode-laser structures, taking into account light diffraction and carrier diffusion. Laser characteristics are found as functions of the above-threshold drive. Besides, 3-5 higher order optical modes on a 'frozen background' are computed by Arnoldi algorithm.(More)
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