Fig. 1 in Take a deep breath… The evolution of the respiratory system of symphytognathoid spiders (Araneae, Araneoidea)

Fig. 1 The respiratory system of Mysmenidae — the genera Maymena and Trogloneta. Dorsal view. a M. ambita, ARS. b M. ambita, PRS with two median entapophyses and two single lateral tracheae. c M. mayana, ARS. d M. rica, ARS with reduced book lungs and tracheal tubes. e T. cantareira, overview of ARS and PRS. f T. cantareira, PRS with a single median entapophysis and two single lateral tracheae. g T. granulum, ARS with reduced book lungs. Abbreviations: BL, book lung; mE, median entapophysis; plT, posterior lateral trachea; rBL, reduced book lung; Sp, spermatheca; TD, transverse duct; Tt, tracheal tube