Ramiplectrus, Yefremova & Feldstein-Farkash, 2025

Yefremova, Zoya A. & Feldstein-Farkash, Tamar, 2025, Ramiplectrus catiensis, a new genus and a new species with branched male antennae and long metatibial spurs from Vietnam (Hymenoptera: Eulophidae), Israel Journal of Entomology (Oxford, England) 54 (6), pp. 7-19 : 13-14

Key to the genera of Eulophinae with long metatibial spurs (males are known for 6 genera)

1 Metatibia with one spur at apex.........................................................................2

– Metatibia with two spurs at apex .......................................................................3

2 Scutellum with two narrow sublateral grooves; TS1 1.1× as long as T1. Male known only for M. thoseae Ferrière , male antenna unbranched .... Metaplectrus

– Scutellum with two broad crenulated grooves; TS1 1.3× as long as T1. Male unknown........................................................................................ Alveoplectrus

3 Scutellum without lateral grooves .....................................................................4

– Scutellum with lateral grooves...........................................................................5 4 Propodeum with posteriorly diverging submedian carinae that originate separately

from basal cup. Male unknown.......................................... Eurycephaloplectrus

– Propodeum with distinct median carina. Male antenna without branches...........

............................................................................................................ Euplectrus

5 Propodeum with strong median carina; mid lobe of mesoscutum with one pair

of setae. Male antenna with or without branches...............................................6

– Propodeum with different structure. Male antenna without branches ...............7

6 Male antenna without branches; digiti of genitalia with 2 spines. TS1 1.3–2.3× as long as TS2; pronotum 2.3–2.5× broader than long in dorsal view................. ........................................................................................................ Platyplectrus

– Male antenna with two branches ( Figs 1 , 3 ); digiti of genitalia with 1 spine. TS1 2.25× as long as TS2; pronotum at least 2.5× broader than long in dorsal view. ............................................................................................ Ramiplectrus gen. n.

7 Propodeum divided into more than four areas, with complete median carina and

two short incomplete submedian carinae......................................... Aroplectrus – Propodeum with two X- or H-shaped submedian carinae ...... Euplectromorpha

Figures

Figs 1, 2. Ramiplectrus catiensis sp. n., male holotype, habitus: (1) dorsal view; (2) lateral view.

Figs 3–7. Ramiplectrus catiensis sp. n., male holotype: (3) head and antenna, dorsolateral view; (4) head,frontal andpropleura + prepectus + fore coxae, ventral view; (5) scutellum + propodeum andhind coxae, dorsal view; (6) metatibia with 2 spurs, lateral view; (7) gaster + genitalia, ventral view.