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. Author manuscript; available in PMC: 2011 May 1.
Published in final edited form as: Dev Biol. 2010 Feb 19;341(1):324–334. doi: 10.1016/j.ydbio.2010.02.018

Fig. 3.

Fig. 3

Dorsal ridge phenotypes of RNAiScr Periplaneta americana first nymphs. (A) Wild type first nymph showing the characteristically large pronotum that conceals most of the head. (A1) Ventral view of the head and thoracic boundary. (B) Lateral view of wild type first nymph. (B1) Magnified view of lateral head and T1 of wild type first nymph shown in (B). Black arrows in A, B, and B1 point to the dorsal ridge (C) Strong RNAiScr nymph phenotype showing the development of a supernumerary segment between the head and the prothorax. (C1) Extra segment viewed from the ventral side (open black arrowheads point to the ectopic segment). (D) Lateral view of RNAiScr first nymph. (D1) Close up of supernumerary segment shown in (D). Black brackets depict the length of the ectopic segment in (D–D1). Abbreviations: ant = antenna; fe = femur; gl = glossa; pg = paraglossa; lp = labial palp; S1 = sub-segment 1 of lp; S2 = sub-segment 2 of lp; S3 = sub-segment 3 of lp.