Micrograph of a Fridericia callosa specimen which has spermathecae with diverticula, collected from Siberia in 1994 (Christensen and Dózsa-Farkas 1999) fixed and stained on slide. A X–XII (sperm funnel marked with black arrow, male copulatory apparati marked with white arrow, lateral view) B–C Spermathecae (diverticula marked with arrows lateral view).

 
 
  Part of: Dózsa-Farkas K, Felföldi T, Nagy H, Hong Y (2019) Two new enchytraeid species (Annelida, Enchytraeidae) from Jeju Island, Korea. ZooKeys 824: 87-108. https://doi.org/10.3897/zookeys.824.25544