Thoracic structures of Mecyclothorax and Amblytelus spp. A–B. Pronotum, dorsal view: A, M. laterorectus; B, M. mouensis. C–F. Prosternum, ventral view: C, M. fleutiauxi; D, M. curtus; E, M. blackburni; F, M. moorei. G–J. Elytral apices, dorsal view: G, M. fleutiauxi; H, M. laterorectus; I, M. lissus; J, A. curtus. K–L. Elytral lateral margin showing eighth stria, lateral view: K, M. ambiguus; L, M. blackburni. Abbreviations include: aag, anteapical groove; acc, accessory elytral dorsal setae in interval 5; as, apical elytral seta; ca, carina laterad stria 7; ls, lateral elytral setae; ri, ridge mesad stria 8; sa, subapical elytral seta; sas, subapical sinuation of elytron; scs, supracarinal elytral setae; 8, medial portion of stria 8.