As part of the series on character coding and analysis, we will learn about the software DELTA during this week’s discussion (February 14, 2014). As stated on its website, “[t]he DELTA format (DEscription Language for TAxonomy) is a flexible and powerful method of recording taxonomic descriptions for computer processing”, and “[i]t was adopted as a standard for data exchange by Biodiversity Information Standards (TDWG).” Read more
Lab members Andrew Jansen, Guanyang, Lin Pan, and Sangmi Lee headed out to the Imperial Sand Dunes near Yuma, AZ, for a weekend in late January to collect beetles and moths that are out and about at this time of the year. It has been a dry winter but darkling beetles and broad-nosed weevils (such as Trigonoscuta) were out in some numbers. See photographs of the wonderful scenery here.
This week our weekly lab discussion group shifts gears from the empiricism/realism debate to actual, and mostly still “manual” (as if hands could think), character matrix assembly, Wagner tree construction, and upward-/downward-pass parsimony-based character state optimization. Consistency and retention indices. And WinClada and NONA. Let’s see how far the first session will take us towards understanding the interaction between characters, parsimony, optimizations, and trees.
We have a new manuscript ready for submission that uses the Euler/ASP toolkit to reason over taxonomic change in the Andropogon (glomeratus-virginicus) ‘complex’ – an illuminating use case assembled by the visionary Alan Weakley. More on this toolkit soon; it is ready for application to larger and more complex use cases.
Nico M. Franz, Mingmin Chen, Shizhuo Yu, Shawn Bowers & Bertram Ludäscher
A new publication is now out in BMC Research Notes.
David J. Patterson, Willi Egloff, Donat Agosti, David Eades, Nico Franz, Gregor Hagedorn, Jonathan A. Rees & David P. Remsen. BMC Research Notes 2014, 7:79. (9 pp.) Read more