Variability related to origin and insertion of the M. longissimus capitis, pars transversalis capitis for members of Subfamily Epictinae.

Symbols and abbreviations: 1 = Anteriormost origin of fibers of the M. longissimus capitis, pars transversalis capitis in tendons associated to the postzygapophyses; 2 = posteriormost origin of the longissimus capitis, pars transversalis capitis in tendons associated to the postzygapophyses; 3 = anteriormost fibers origin of the M. longissimus capitis, pars transversalis capitis in the vertebrae centrum; 4 = posteriormost origin of the M. longissimus capitis, pars transversalis capitis in the vertebrae centrum; 5 = insertion area of the M. longissimus capitis, pars transversalis capitis in the skull. “?” = indicates the impossibility of examination due to specimen damage, “V” = vertebrae of origin where V1 = atlas, V2 = axis, V3 = first thoracolombar vertebra and so on.