Duappendactylus, Schall & Gu & Husemann, 2025

Schall, Ole-Kristian Odin, Gu, Jun-Jie & Husemann, Martin, 2025, Two new members of Tridactylidae (Orthoptera: Caelifera) from mid-Cretaceous Kachin amber, Zootaxa 5693 (2), pp. 168-178 : 169-170

Genus Duappendactylus gen. nov.

Zoobank-ID: urn:lsid:zoobank.org:act:

Type species: Duappendactylus melanocephalus sp. nov.

Etymology: The genus name is a combination of the Latin words “duo” (two) and “appendix” (appendage) as well as the ending -dactylus which is commonly used in Tridactylidae . It refers to the absence of the paraproctal processes of the genus, meaning there are only two and not four (as usually in Tridactylidae ) abdominal appendages.

Diagnosis: Small body size, 1.41 mm (head to abdominal apex; not including subgenital plate). Antennae ten-segmented. Only forewings present, with reduced venation. Protibia with three dactyls. Mesotibia distinctly inflated. Metafemur heavily inflated along entire length, dorsally with setae. Metatibia shorter than metafemur and without swimming plates. Apical metatibial spurs slightly longer than subapical tibial spurs. Metatarsus one-segmented, present (i.e. not very reduced as in Ellipes Scudder, 1902 or Xya Latreille, 1809 ). Cerci two-segmented, basal segment much wider and longer than distal segment; both segments with setae. Paraproct very prominent, broadly triangular, but without paraproctal processes. Subgenital plate elongated, reaching to ca. half the length of basal cercus segment; directed upwards and with long distinct apical setae.