CLADOENDESIS OF EPHEMEROPTERA
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Figure 5. Pterothorax of Siphlonurus/fg4 aestivalis [Siphlurus]. [ A]

A–C – imaginal pterothorax: A–B – lateral view; C – anterior view (muscles shown by interrupted lines and dotted, muscle bases outlined by dotted lines); D – subimaginal exuviae of left mesopleuron. (From Kluge 1994a).

Abbreviations: AEM – anepimeron; AES – anepisternum; ALPs – antelateroparapsidal suture; ALSc – anterolateral scutal costa; ALSs – anterolateral scutal suture; ANi – anteronotal transverse impression; ANp – anteronotal protuberance; AN.Pm – anteronoto-pleural muscle; Ax.Fm – axillar-furcal muscle; Ax.PmI – inferior axillar-pleural muscle; BA – basalare; BA.Cm – basalar-coxal muscle; BA.SmI – inferior basalar-sternal muscle; BA.SmS – superior basalar-sternal muscle; BR – basiradiale; BS – basisternum; BSc – basisubcostale; CxC – coxal conjunctiva; Cx.Cxm – coxo-coxal muscle; F – furca; F.Cm – furca-coxal muscle; F.CmP – posterior furca-coxal muscle; F.CmS – superior furca-coxal muscle; Fm – furcal muscle; FS – furcasternum; FSp – furcasternal protuberance; HP – humeral plate; iFm – intersegmental furcal muscle; ISL – infrascutellum; KEM – katepimeron; KES – katepisternum; KESsA – anterior katepisternal suture; KESsP – posterior katepisternal suture; LPN – lateropostnotum; LPNC – lateropostnotal crest; LPs – lateroparapsidal suture; LSs – lateral scutal suture; MLs – median longitudinal suture; MNs – mesonotal suture; MPN – mediopostnotum; MPs – medioparapsidal suture (notaulix); MS – medioscutum; MTm – median tergal muscle; PAB:DA – dorsal arc of prealar bridge; PAB:LA – lateral arc of prealar bridge; PAB:PA – posterior arc of prealar bridge; PAB:VA – ventral arc of prealar bridge; P.Cm – pleuro-coxal muscle; PCxsA – anterior paracoxal suture; PCxsP – posterior paracoxal suture; PhA – anterior phragma; PhM – middle phragma; PhP – posterior phragma; PLS – prelateroscutum; PLsI – inferior pleural suture; PLsS – superior pleural suture; PSA – postsubalar sclerite of lateropostnotum; PSL.Cm – parascutellar-coxal muscle; PSp – posterior scutal protuberance; P.Trm – pleuro-trochanteral muscle; PWP – pleural wing process; SA – subalare; SAC – subalar conjunctiva; SA.Cm – subalar-coxal muscle; SA.Fm – subalar-furcal muscle; SA.Sm – subalar-sternal muscle; S.CmA – anterior scuto-coxal muscle (tergal promotor of coxa); S.CmP – posterior scuto-coxal muscle (tergal remotor of coxa); S.ESm – scuto-episternal muscle of mesothorax; S.ESm3 – scuto-episternal muscle of metathorax; SL – scutellum; S.LPNm – scuto-lateropostnotal muscle; SLS – sublateroscutum; SMS – submedioscutum; S.PSLs – scuto-parascutellar suture; S.Trm – scuto-trochanteral muscle; SrA.Pm – suralare-pleural muscle; S.SLi – scuto-scutellar impression; Teg – tegula.