part of larval abdominal seta siphon and spiracular apparatus seta TGMA:0000857 TGMA:0000857 The siphon (pecten plate in anophelines) and spiracular apparatus possess 13 pairs of setae of uniform occurrence. Additional setae occur in sabethines but since they do not occur in other taxa they are regarded as being adventitious and are therefore not included in the standard setal nomenclature. The setae on these structures are numbered from proximal to distal. No homologies are implied with setae borne elsewhere on the abdomen. The terminology consists of an Arabic number for each seta connected by a hyphen with a capital letter "S". The structures referred to above are comprised of parts of embryonic abdominal segments VIII and IX. default_namespace larval abdominal segment VIII