. Smithsonian miscellaneous collections. Tn- Stn sa 1st. Pcx Ls Stn SsMst) Fig. 13.—Diagrams suggesting the development of the pterygote pleuron fromthe subcoxa of the leg basis. (Compare with Fig. i.) A, subcoxa! sclerotization () united ventrally with edge of primary ster-nite (Stn), its dorsal extremity prolonged upward as a wing support (B, WP),posterior part of entrochantin (fig. i, Eiitii) fused with eupleural arch (fig. i,Etipl) of subcoxa. B, a fundamental structural condition of pleuro-sternal region of a wing-bearing segment: the area of subcoxa differentiated into an episternum
. Smithsonian miscellaneous collections. Tn- Stn sa 1st. Pcx Ls Stn SsMst) Fig. 13.—Diagrams suggesting the development of the pterygote pleuron fromthe subcoxa of the leg basis. (Compare with Fig. i.) A, subcoxa! sclerotization () united ventrally with edge of primary ster-nite (Stn), its dorsal extremity prolonged upward as a wing support (B, WP),posterior part of entrochantin (fig. i, Eiitii) fused with eupleural arch (fig. i,Etipl) of subcoxa. B, a fundamental structural condition of pleuro-sternal region of a wing-bearing segment: the area of subcoxa differentiated into an episternum (Eps),an epimeron (Epm), a precoxal bridge (Acx), a postcoxal bridge (Pcx), alaterosternite (Ls), and a trochantin (Tii) ; the definitive sternum includes theprimary segmental sternite (Stn), the following intersegmental intersternite, orspinasternite (Ss), and a subcoxal laterosternite (Ls) on each side; the ventralcoxal articulation (A, (/) is lost, and coxa has a secondary anterior articulationwith trochantin (c). A, B) its dorsal and posterior p
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Keywords: ., bookauthorsm, bookcentury1800, bookdecade1860, booksubjectscience
