Reproductive or neotenic soldiers of the Archotermopsid Zootermopsis nevadensisnevadensis (Hagen) are compared to sterile soldiers and primary male reproductives. Several head capsule morphometrics correlate significantly with gonad size across all forms and both sexes of soldiers. The easily observed field character of ratio of mandible length to labrum length is a consistent and reliable feat...

The non-secreting rat myeloma cell line YB2/0 could be separated into different cell fractions by counterflow centrifugal elutriation. The obtained fractions are analyzed by morphology studies, morphometrics, clonogenic assays and flow cytometry. The methodology is extensively described. A separation of different cell fractions according to cell cycle stages was achieved. This implies further a...

Detailed descriptions of morphological features, morphometrics, neurocranium anatomy, clasper structure and egg case descriptions are provided for the thickbody skate Amblyraja frerichsi; a rare, deep-water species from Chile, Argentina and Falkland Islands. The species diagnosis is complemented from new observations and aspects such as colour, size and distribution are described. Geographic an...

This paper presents a new approach for the morphometrical characterization of brain structures using shape features calculated from normal fields. An orientable surface representation of the brain structure is derived allowing the estimation of the corresponding normal field without the need of a parameterized surface. In fact, the normal field is calculated from the application of the 3D wavel...

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Acknowledgements The order of authorship reflects the relative contribution of individuals to the writing of this article. We would like to thank the following have provided support and/or encouragement for the bat echolocation research reported herein: Charlotte Walters, Lucinda Kirkpatrick, Stuart Parsons, and Alanna Collen. This investigation depended critically on the EchoBank bat echolocat...