Some representatives of the extant Systellognatha, head in ventral view. A Kamimuria petasus Chen, 2019c (Perlidae), adult. B K. petasus, larva. C Neofilchneria wanglanga Chen, 2019d (Perlodidae), adult. D N. wanglanga, larva. E Suwallia wolongshana Du & Chen, 2015 (Chloroperlidae), adult. F S. wolongshana, larva. G Pteronarcys sachalina Klapálek, 1908 (Pteronarcyidae), adult. H P. sachalina, larva. I Microperla retroloba (Wu, 1937) (Peltoperlidae), adult. J M. retroloba, larva. K Styloperla inae Chao, 1947 (Styloperlidae), adult. L S. inae, larva.

 
 
  Part of: Chen Z-T (2022) The larval morphology of a new mid-Cretaceous stonefly and its systematic position in Plecoptera. Arthropod Systematics & Phylogeny 80: 423-438. https://doi.org/10.3897/asp.80.e82549