Hatching and Postembryo of C. salei. All scale bars 200 μm. Light micrograph, a; SEMs, b-g. a: Lateral view of a live hatching embryo. White arrow points toward air underneath the egg membranes. This air space between the membranes and the embryo surface becomes evident shortly before hatching. b: Lateral view of hatching embryo with chorion (Cho) and embryonic cuticle (EC) partially removed. c: Frontal view of newly hatched postembryo. d: Ventral view of postembryo. The spinneret anlage (Sp) is now clearly evident as bilateral bulges in the ventral opisthosoma. e: Detail of the tips of the walking legs of the postembryo. Black arrowheads indicate tarsal claws. f: Lateral view. White arrowheads mark the line where the cuticle of the postembryo will eventually break for the first moult to first instar. g: Dorsal view. The narrow petiolus (Pet) connects the prosoma and opisthosoma. AT, anal tubercle; Ch: chelicere; en, endite; L1-L4, walking legs one to four; P, pedipalp.