larval seta larval abdominal seta In fourth stage larvae, a maximum of 12 pairs of setae are found on abdominal segment I, 15 pairs on abdominal segments II through VII, seven pairs on abdominal segment VIII, 13 pairs on the siphon (pecten plate in anophelines) and spiracular apparatus (derived from embryonic abdominal segments VIII and IX), and four pairs on abdominal segment X. The terminology for these setae consists of an Arabic number for each indicating its presumed primitive sequential relationship in the Culicidae in which seta 1 is closest to the dorsal longitudinal midline with the higher-numbered setae following progressively around the side to the ventral longitudinal midline, connected by a hyphen with a capitalized Roman numeral indicating the abdominal segment on which the seta occurs. TGMA:0000828 TGMA:0000828 default_namespace