Sexual differentiation in amphioxus B. californiense, mature individuals: a female, with signs of some gonads having spawned (right side of the picture) b male with well-developed gonads (right side of the picture) and some gonads in the process of development (left side of the picture).

 
 
  Part of: Campos-Dávila L, Pérez-Estrada CJ, Rodríguez-Estrella R, Morales-Bojórquez E, Brun-Murillo FG, Balart EF (2019) Seagrass Halodule wrightii as a new habitat for the amphioxus Branchiostoma californiense (Cephalochordata, Branchiostomidae) in the southern Gulf of California, Mexico. ZooKeys 873: 113-131. https://doi.org/10.3897/zookeys.873.33901