1. Spermiogenesis of the Architectonicid Philippia (Psilaxis) oxytropis was studied using transmission electron microscopy

2. Two microtubule‐containing structures are assembled during spermiogenesis: a transient manchette and a stable Axoneme

3. Spermiogenesis and Biflagellate spermatozoon of the teleost fish Lampanyctus crocodilus (Myctophiformes, Myctophidae): ultrastructure and characterisation of its sperm basic nuclear proteins

4. The spermatids of Campodea C. remyi Denis are clumped in small bundles of 236 to 650 elements during spermiogenesis, their acrosomes being embedded within an homogeneous electron dense material.