Semiclassical description of resonance-assisted tunneling in one-dimensional integrable models.

Resonance-assisted tunneling is investigated within the framework of one-dimensional integrable systems. We present a systematic recipe, based on Hamiltonian normal forms, to construct one-dimensional integrable models that exhibit resonance island chain structures with accurately controlled sizes and positions of the islands. Using complex classical trajectories that evolve along suitably defined paths in the complex time domain, we construct a semiclassical theory of the resonance-assisted tunneling process.

Description of nymphal stages of Periglischrus cubanus (Acari, Spinturnicidae), parasites from Erophylla sezekorni bombifrons (Chiroptera) from Puerto Rico with observations on the nymphal stages and host-parasite relationships within the genus Periglischrus.

The adults of Periglischrus cubanus were described by Dusbábek (1968). In this study, we describe the nymphal stages of this species and make some general observations on nymphal stages in the genus Periglischrus.

Instantons re-examined: dynamical tunneling and resonant tunneling.

Starting from trace formulas for the tunneling splittings (or decay rates) analytically continued in the complex time domain, we obtain explicit semiclassical expansions in terms of complex trajectories that are selected with appropriate complex-time paths. We show how this instantonlike approach, which takes advantage of an incomplete Wick rotation, accurately reproduces tunneling effects not only in the usual double-well potential but also in situations where a pure Wick rotation is insufficient, for instance dynamical tunneling or resonant tunneling. Even though only one-dimensional autonomous Hamiltonian systems are quantitatively studied, we discuss the relevance of our method for multidimensional and/or chaotic tunneling.

Spinturnicid mites and bats cophylogeny: comment on Bruyndonckx et al. (2009) "Molecular cophylogenetic relationships between European bats and their ectoparasitic mites (Acari, Spinturnicidae)".

Recently, Bruyndonckx et al. (2009) used phylogenetic analyses of mitochondrial sequences of European Spinturnicidae parasitizing bats to assess the coevolutionary relationships between host and parasite lineages. Despite being a good investigation into bat ecology and exhibiting an indisputable competence in molecular data analysis, the paper reflects a lack of knowledge of the basic biology and ecology of Spinturnicidae.

Description of Cameronieta torrei dusbabeki (Acari: Mesostigmata: Spinturnicidae), new subspecies with nymphs, parasitizing Pteronotus quadridens fuliginosus (Chiroptera: Mormoopidae) from Puerto Rico.

We describe a new subspecies, Cameronieta torrei dusbabeki, a parasite of Pteronotus quadridens fuliginosus (Gray 1843) from Puerto Rico.