Dear Charlotte; I work with the spider family Trechaleidae, especially with the /Paratrechalea/ genus, using GM landmarks. As you have notice, there are few works on the subject available, but as Andrea Cardini said, there are severall works with insects, which are of great help. Besides Crews & Hedin (2006), there is this other paper: Bond J.E. & Beamer D.A. (2006). A morphometric analysis of mygalomorph spider carapace shape and its efficacy as a phylogenetic character (Araneae). Invertebrate Systematics 20: 1-7.
About the scale problem, I take all the pictures by connecting my camera in the stereomicroscope, using the eyepiece scale as a reference. Preliminary tests showed strong consistence on the measurements. Cheers! -- Luiz Ernesto Costa Schmidt Núcleo de Aracnologia - Departamento de Genética Universidade Federal do Rio Grande do Sul Av. Bento Gonçalves, 9500 - Prédio 43323 - Sala 205 Porto Alegre, RS/Brasil. CEP 91501-970 Fone: ++55 51 33086732 -- Replies will be sent to the list. For more information visit http://www.morphometrics.org
