Figure 4 in A novel epidermal gland type in lizards (α-gland): structural organization, histochemistry, protein profile and phylogenetic origins

Figure 4. Ventral view of (A) a male Tropidurus chromatops Harvey & Gutberlet, 1998 (MHNC-R 3018) from ~30 km W Florida, Santa Cruz, Bolivia, (B) a male T. melanopleurus Boulenger, 1902 (IBIGEO-R 5331) from Aguas Blancas, Salta, Argentina, (C) a female T. xanthochilus Harvey & Gutberlet, 1998 (MZUSP-R 106321) from Santo Antônio do Leverger, Mato Grosso, Brazil, and (D) a male T. etheridgei Cei, 1982 (AMNH-R 176273) from Filadelfia, Boquerón, Paraguay, illustrating the location and coloration of flash marks observed (or not) on the ventral body of tropidurines. Black squares in (A) indicate body areas from which we collected skin samples for histological examination. In (D) the yellow coloration covering the background of the black flash-marks of T. etheridgei might either represent a transient ontogenetic state or an instance in which a yellow background persists throughout life.