Heads and pronota of Helophorus species a–d H. orientalis a triploid female from Qitaihe b male from Logan c female from Waterloo, Ontario d fossil pronotum from Brandon Terrace, Warwickshire e–h H. brevipalpis, parthenogenetic females e from Logan Canyon, Utah f triploid from Algadefe g triploid from Ponte Scipione h triploid from near Sologno. Scale bar: 1 mm.

 
 
  Part of: Angus RB, Jia F (2020) Triploidy in Chinese parthenogenetic Helophorus orientalis Motschulsky, 1860, further data on parthenogenetic H. brevipalpis Bedel, 1881 and a brief discussion of parthenogenesis in Hydrophiloidea (Coleoptera). Comparative Cytogenetics 14(1): 1-10. https://doi.org/10.3897/CompCytogen.v14i1.47656