Diversity of Torrenticola in Ouachita National Forest, Arkansas. Species from top-left to bottom-right: T. irapalpa sp. n., T. interiorensis sp. n., T. biscutella sp. n. female, T. biscutella sp. n. male, T. pearsoni sp. n., T. trimaculata Fisher & Dowling 2016, T. unimaculata sp. n., T. larvata Cherri et al. 2016, T. solisorta sp. n. Note that, for a given locality, many characters necessary for identification can be seen under low magnification. For example, species in the bottom row can be readily differentiated using color pattern. In contrast, species in the top row have similar color patterns; however, even they can be readily identified: T. irapalpa have dorsal glandularia (Dgl-4) closer together than the other species and T. biscutella have fused anterio-lateral platelets and strong sexual dimorphism (neither character is present in T. interiorensis). Only the identification of T. interiorensis is tentative based on this image, because T. neoanomala (not pictured), which are also found in this locality, can only be differentiated from T. interiorensis by comparing precise measurements of the anterio-lateral platelets, necessitating examining slide-prepared material under higher magnification. Also, note that some species can appear differently than what is depicted in species descriptions. For example, although T. pearsoni sp. n. has a nearly colorless cuticle, it can appear dark due to gut contents, as shown here. Image is a composite of stacked images from a Samsung GS7 and edited in Adobe Photoshop.

 
 
  Part of: Fisher JR, Fisher DM, Skvarla MJ, Nelson WA, Dowling APG (2017) Revision of torrent mites (Parasitengona, Torrenticolidae, Torrenticola) of the United States and Canada: 90 descriptions, molecular phylogenetics, and a key to species. ZooKeys 701: 1-496. https://doi.org/10.3897/zookeys.701.13261