TABLE 5 Character States Letters a – e in COMPARATIVE ANATOMY OF THE INSECT TRACHEAL SYSTEM PART 1: INTRODUCTION, APTERYGOTES, PALEOPTERA, POLYNEOPTERA

TABLE 5 Character States Letters a–e correspond to character state variations in figure 124.
NumberDescriptionStates1.1Longitudinal connections between spiracles (DLT)1.2VLT presenta = Tn-VLT present b = An-VLT present1.3MLT present2Alimentary canal of adult coopted as air sacFor Embioptera, male only3Long, linear trunk running length of body (from T2-S)4Extensive bush of tracheae from T2-FM and T3-FM, supplying flight muscles5Dorsal-ventral connection between H-DCT and H-VCT in head6Sausagelike tracheae in abdomen. Various forms and positions.a = enlarged extensions off DLT b = DB enlarged c = dual, enlarged DB d = DLT enlarged e = VB enlarged7Wing bridge Wbr.a = WBr present b = AWba/PWba present c = AWba only, PWba absent8AWL branching patterna = T2,3-AWL off T2,3-S b = T2,3-AWL off T2,3-DB9T[2,3]-VL presenta = T2-VL, V3-VL present b = T3-VL only10T2-CT present11Asymmetric connectives in thorax