The Practicing Systematist

Wednesday, September 13, 2006

Monteverde vs. Venezuela - First Dissections

Short clarification regarding the previous post: when I mentioned that two examined species likely pertained to Ganglionus and Terioltes, respectively, this judgment was rooted in the recognition of synapomorphies for the two genera established in my thesis work.
Results from the first dissections are in: the putative new "Monteverde" and "Venezuela" species of Cotithene are quite similar, to the point that they share a relatively complex sclerite inside the male aedeagus. However, the ventral apex of that sclerite is distinctly plicate (folded over) and D-shaped in the Monteverde specimen vs. slightly plicate and V-shaped in the Venezuela specimen. These are pretty subtle differences, but for now they are sufficient to treat the two series separately.

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