FIG. 4 in The Nuptial Pads of Melanophryniscus (Anura: Bufonidae), with the Unexpected Occurrence of Nuptial-Pad-Like Structures in Females of Two Species

FIG. 4. Cross sections of Melanophryniscus cambaraensis male (MCN13477; [A,C]) and female (UFRGS6327; [B,D]) thumbs. Magnifications of selected areas show the presence of sexually dimorphic skin glands (black arrows) in males (C), and the presence of ordinary mucous (OMG) and ordinary serous glands (OSG) in females. D, dermis; E, epidermis; black arrow head, papillary epidermal projections; white arrow, stratum corneum. Scale bars: 100 µm.