Doryphoribius doryphorus (Binda and Pilato, 1969)

Pérez-Pech, Wilbert Andrés, Anguas-Escalante, Abril, Cutz-Pool, Leopoldo Querubin & Guidetti, Roberto, 2017, Doryphoribius chetumalensis sp. nov. (Eutardigrada: Isohypsibiidae) a new tardigrade species discovered in an unusual habitat of urban areas of Mexico, Zootaxa 4344 (2), pp. 345-356 : 353-354

The doryphorus group:

17(2). Claws IV reduced and clearly smaller than claws I–III................................................. D. pilatoi -. Claws IV similar in size or larger than claws I–III.......................................................... 18 18(17). Entire cuticle without sculpture.........................................................................19 -. Cuticle at least partially sculptured...................................................................... 22 19(18). Lunules on internal claws I–III present, on external absent............................................ D. koreanus -. Internal and external claws without lunules............................................................... 20 20(19). Stylet furcae robust, triangular in shape, with the postero-lateral processes rounded but not swollen.......... D. neglectus -. Stylet furcae with swollen postero-lateral processes.........................................................21 21(20). Oral cavity armature visible, and one large dorso-median tooth at the beginning of the buccal tube present, buccal tube 3 µm or

more in width.............................................................................. D. macrodon -. Oral cavity armature absent/not visible under LM, buccal tube less than 3 µm in width.................... D. doryphorus 22(18). Dorsal cuticle smooth but large granules present on legs IV........................................ D. tergumrudis -. Dorsal cuticle sculptured.............................................................................. 23 23(22). Ventral sculpture present, lunules on claws present, pt of buccal tube width less than 15, eyes present........ D. polynettae -. Ventral sculpture absent...............................................................................24 24(23). Lunules on claws absent, pt of buccal tube external width more than 20, eyes absent..................... D. smokiensis -. Lunules present, those of the internal claws of the first three pairs of legs often could be difficult to see............... 25 25(24). A cuticular bar at the base of the inner claws on the first three pairs of legs present, evident lunules of the inner claws......

......................................................................................... D. solidunguis -. A cuticular bar at the base of the inner claws on the first three pairs of legs absent.................................26 26(25). Cuticle with a delicate reticulate sculpture of very thin ridges forming a mesh with a tiny tubercle at each crossing, sculptured

legs........................................................................................ D. bindae -. Cuticle with an evident reticulated sculpture with mesh slightly irregular in shape and size, delimited by ridges which form a

tubercle at each crossing legs not sculptured.................................................... D. amazzonicus