Frontal muscle scars of Trachyleberidinae and Hemicytherinae (Ostracoda).
One transverse and one mandibular muscle form the frontal scars on each valve in both the trachyleberines and hemicytherines. Bifurcation of the transverse muscle into anterior-posterior bundles (trachyleberine) and into dorsal-ventral bundles (hemicytherine) and mandibular muscle position account for the different frontal scar patterns observed.
D000717:Anatomy, Comparative; D000818:Animals; D003445:Crustacea / Q000033:anatomy & histology*; D009132:Muscles / Q000033:anatomy & histology*; D013045:Species Specificity