Criodrilus lacuum (genital area with spermatophores)
Description Genital area of Criodrilus lacuum showing the external spermatophores. Specimen from the German Neckar river.Author van Haaren, TonJPG file - 437.67 kB - 1 505 x 637 pixelsadded on 2019-04-271 096 views This work is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 4.0 License