part of mesanepisternum anterior mesanepisternum Abbr: AMas in ISBN:0-937548-00-6. In some Diptera, the somewhat triangular anterior part of the mesanepisternum bearing the mesothoracic spiracle; separated from the posterior mesanepisternum and the mesokatepisternum by the anepisternal cleft. In mosquitoes, divided into four areas, the prespiracular area anterior to the spiracle, the hypostigmal area immediately below the spiracle, the subspiracular area ventral to the hypostigmal area immediately below the spiracle, the subspiracular area ventral to the hypostigmal area and the postspiracular area posterior to the hypostigmal and subspiracular areas. Mesepisternum TGMA:0000354 TGMA:0000354 anepisternum anterior anepisternum anterior episternum default_namespace dorsales Mesepisternum episternum of mesothorax mes-episternum mesanepisternum meso-episternum mesopleuron mesothoracic anepisternum postspiracular area preanepisternum preepisternum