Retiptera brennae, Cumming & Engel & Lian & Ulitzka, 2024

Key to presently described Iotacyphinae species

1. Antennae seven segmented; hindwing well-developed, only slightly shorter/narrower than the forewing....................... 2

— Antennae eight segmented; hindwing reduced, long and thin, significantly smaller than the forewing.................................................................................................................................... Retiptera brennae gen. et sp. nov.

2. Forewing with a fused Rs1+MA vein emerging from the central closed cell, splitting into the Rs1 and MA which run diverging to the wing margin............................................................ Iotacypha zherikhini Shcherbakov et al., 2024

— Forewing with Rs1, Rs2, and MA emerging independently from the closed cell........... Burmacypha longicornis Zherikhin, 2000

Flagellomere III 0.18 mm,

Flagellomere IV 0.11 mm,

Flagellomere V 0.09 mm,

Flagellomere VI 0.08 mm,

Profemora 0.16 mm,

Mesofemora 0.16 mm,

Metafemora 0.18 mm,

Protibia 0.12 mm,

Mesotibia 0.20 mm,

Metatibia 0.27 mm,

Protarsi 0.07 mm,

Mesotarsi 0.07 mm,

Metatarsi 0.09 mm.

- Measurements of the female paratype specimen ( Fig. 6A) which is in a flat profile view within the amber.

Body length (from front of head to apex of abdomen) 0.83 mm, Head depth (top of head to tip of mouthparts) 0.23 mm,

Head length 0.09 mm,

Abdomen length 0.45 mm,

Forewing length 0.85 mm,

Forewing maximum width 0.54 mm,

Total antenna length ~ 0.92 mm.