Plectrocnemia astroblema Melnitsky, Ivanov & Perkovsky, 2025

Plectrocnemia astroblema Melnitsky, Ivanov & Perkovsky sp. n.

https://zoobank.org/ urn:lsid:zoobank.org:act:A4848301-5A57-46B3-A3ED-FDC32952B80E

( Figs 1 View Figure 1 , 2 A, B View Figure 2 , 6 A, B View Figure 6 )

Type material: Holotype. Male. SIZK K–32171, Rovno amber, late Eocene.

Description. Body length 4.7 mm; forewing length 5.7 mm. Head, legs, abdomen, wings and thorax light yellow, antennae light brown. Head and thorax with light hairs. Abdominal sternite V has long lateral processes, smoothly curved and directed posterolaterally.

Male genitalia. Posterior margin of segment IX with strong angular projection at the base of inferior appendages. Inferior appendages are wide and short on caudal view, with tooth-like dorsal projections directed inwards and covered with long dorsal bristles; the lateral view shows them as irregularly triangular. Superior appendages (preanal appendages, cerci) large, rounded. Segment X nonsclerotized, with 3 rounded caudal lobes. Ventral projections of segment X long, curved posterodorsad. Aedeagus robust with 2 pairs of long apical spines: the longer pair with strong subterminal bend, the shorter almost straight. Two additional thin spines are present at base of aedeagus.

Comparison. The new species resembles Plectrocnemia barbata Pictet, 1856 and Plectrocnemia synthesia Ivanov et Melnitsky, 2013 from Baltic amber. Large rounded superior appendages and less prominent sternum IX differ it from P. barbata . Larger superior appendages and aedeagal spine configuration are good distinguishing characters from Plectrocnemia synthesia Ivanov et Melnitsky, 2013 having three smaller spines at each side of the aedeagus.

Etymology. From the latinized Greek astroblema (astrobleme, impact structure) in the memory of asteroid Chicxulub falls that putatively changed the pre - Cenozoic life.

Distribution. Priabonian Rovno amber.