Macrostomum littorale Wang & Shi, sp. nov. A–C horizontal whole-body sections, ventral view (stained by H&E) D, E longitudinal sections, showing male copulatory apparatus (stained by modified Mallory-Heidenhain/Cason stain and hematoxylin). Abbreviations: br: brain; cg: cement glands; eg: egg; fg: female gonopore; fvs: false vesicula seminalis; i: intestine; m: mouth; o: ovary; ps: penis stylet; t: testis; vg: vesicula granulorum; vs: vesicula seminalis. Scale bars: 50 μm (A); 20 μm (B–E).

 
 
  Part of: Shi Y, Zeng Z, Wang J, Zhang S, Deng L, Wang A (2022) Three new species of Macrostomum (Platyhelminthes, Macrostomorpha) from China and Australia, with notes on taxonomy and phylogenetics. ZooKeys 1099: 1-28. https://doi.org/10.3897/zookeys.1099.72964