Discleroderma, Kieffer, 1904

Wang, Chun-Hong & Chen, Xue-Xin, 2024, First record of Discleroderma Kieffer (Hymenoptera, Bethylidae) from China and Republic of the Congo, with description of two new species, Zootaxa 5477 (3), pp. 380-386 : 381-382

Key to the world Discleroderma species (modified from Azevedo et al., 2020)

1 Notaulus present...................................................................................... 2

- Notaulus absent...................................................................................... 5

2 Notaulus incomplete and not well-impressed; pair of acute lateral tubercles of metasomal terga IV–V connected by transverse carina.............................................................................................. 3

- Notaulus complete and well-impressed; pair of acute lateral tubercles of metasomal terga IV–V not connected by transverse carina…............................................................................................ 4

3 Metasomal tubercles callus-shaped............................................. D. tuberculatum ( Magretti, 1897)

- Metasomal tubercles spine-shaped............................................ D. indiensis Lanes & Azevedo, 2008

4 Transverse posterior carina of metapectal-propodeal disc straight; metasomal tergum III with pair of reddish-brown tubercles; metasomal terga IV–V with tubercles cone-shaped; inter-tubercular distance of metasomal tergum IV about one-third length of posterior margin..................................................................... D. xizangense sp. nov.

- Transverse posterior carina of metapectal-propodeal disc incurved medially; metasomal tergum III with pair shallow depression; metasomal terga IV–V with tubercles cone-shaped and sharp; distance between tubercles of metasomal tergum IV about one-fifth length of posterior margin.......................................................... D. congonse sp. nov.

5 Gena extremely bulging ventrally, nearly 1.5 × wider than eye in lateral view................ D. gundari Terayama, 2006

- Gena regularly bulging ventrally, 1.1–1.4 × wider than eye in lateral view........................................ 6

6 Metasomal tubercles spine or spoiler-shaped................................................................ 7

- Metasomal tubercles small, callus-shaped.................................................................. 8

7 Metasomal tubercles spine-shaped; anterior corner of metapectal-propodeal disc without cavity............................................................................................ D. yemenensis Lanes & Azevedo, 2008

- Metasomal tubercles spoiler-shaped; anterior corner of metapectal-propodeal disc with cavity................................................................................... D. plymouthoides Azevedo, Vargas & Colombo, 2020

8 Head considerably converging anterad, wider posteriorly in dorsal view; gena visible in dorsal view................................................................................ D. concursum Azevedo, Vargas & Colombo, 2020

- Head barrel-shaped, slightly wider medially than anteriorly and posteriorly in dorsal view, or nearly so; gena not visible in dorsal view.......................................................................................... 9

9 Head barrel-shaped, wider at mid-eye level; parapsidal signum complete, narrow, inconspicuous...................................................................................... D. dolium Azevedo, Vargas & Colombo, 2020

- Head subbarrel-shaped, wider at dorsal third of eye level; parapsidal signum incomplete anteriorly, thick, conspicuous.................................................................. D. guamensis Azevedo, Vargas & Colombo, 2020