Histological characteristics of Glossobalanus weii sp. nov. A longitudinal section through the anterior proboscis B transverse section through the anterior proboscis C frontal section through the posterior proboscis and collar D transverse section through the anterior collar E transverse section through the posterior collar F transverse section through the hepatic region. Abbreviations: buccal diverticulum (bd); circular musculature (cm); epidermis (ep); glomerulus (gl); hepatic sacculations (hs); longitudinal musculature (lm); nerve cord (nc); proboscis cavity (pc); perihaemal diverticula (pd); proboscis skeleton (pk).