Cretojapyx, Wang & Huang & Cai, 2023

Wang, Ye-Hao, Huang, Di-Ying & Cai, Chen-Yang, 2023, A new genus of japygids (Diplura: Japygidae) in mid-Cretaceous amber from northern Myanmar, Zootaxa 5396 (1), pp. 64-73 : 66

Cretojapyx gen. nov.

Type species. Cretojapyx huangi sp. nov.

Etymology. The generic name is derived from the prefix ‘ Creto -’ meaning the age of the japygid fossil, and ‘ japyx ’, the type genus of Japygidae .

Diagnosis. Pronotum with 4+4 M1–4, mesonotum and metanotum with 5+5 M1–5. Urotergite I with 2+2 macrosetae (M1, M5); urotergite II VI each with 4+4 macrosetae (M1–2, M4–5) plus 1 anterior lateral M; urotergite IV with 5+5 M1–5; urotergite III, V each with 5+5 M1–5 plus 1 anterior lateral M; urotergite VII with 2+2 macrosetae (M2, M5); urotergite VIII with 2+2 macrosetae (M4, M5). Styli tapered to a point at the end. Segment Ⅹ and cerci with strong carinae, acropygium round. Cerci asymmetric, the basal 2/3 rectilinear and curved in the distal part, the end in hook-like shape; right cercus with a postmedian tooth followed by a uniseriate row of round denticles; left cercus without distinct tooth or denticles.