Wormaldia McLachlan, 1865

Johanson, Kjell Arne & Pham, Hong-Thai, 2025, Description of three new species of Wormaldia McLachlan, 1865 from Vietnam (Trichoptera: Philopotamidae), European Journal of Taxonomy 1007, pp. 24-34 : 27-28

Genus Wormaldia McLachlan, 1865

Key to the Vietnamese male species of Wormaldia McLachlan, 1865

1. Harpagones are clearly shorter than coxopodites ............................................................................. 2

– Harpagones about as long as, or longer than coxopodites ................................................................ 9

2. Harpagones about straight in lateral view ........................................................................................ 3

– Harpagones curving ventrally in lateral view ................................................................................... 6

3. Tergite X exceeding coxopodites posteriorly ............................ Wormaldia sinocornuta Mey, 1996

– Tergite X not exceeding coxopodites posteriorly ............................................................................. 4

4. Harpagones almost parallel-sided in lateral view ......................... Wormaldia caobangensis sp. nov.

– Harpagones triangular in lateral view ............................................................................................... 5

5. Tergite X curving dorsally at apex; harpagones with rounded mesal projection in ventral view ....... .................................................................................................... Wormaldia meosorum (Mey, 1996)

– Tergite X curving pointing distally at apex; harpagones with mesal margin straight in ventral view ................................................................................................ Wormaldia muoinam (Malicky, 1995)

6. In lateral view, harpagones as high at mid-length as at base ............................................................ 7

– In lateral view, harpagones clearly lower at mid-length than at base ............................................... 8

7. In lateral view, coxopodites with straight ventral margin; dorsal margin with triangular projection oriented dorsally .............................................................................. Wormaldia piadenensis sp. nov.

– In lateral view, coxopodites with convex ventral margin; dorsal margin smoothly convex, without triangular projection ................................................................... Wormaldia muoihai Malicky, 1995

8. In lateral view, harpagones uniformly curving venrally along their length ........................................ ................................................................................................. Wormaldia nyctimon (Schmid, 1991)

– In lateral view, harpagones sharply bending ventrally before apex .................................................... ....................................................................................... Wormaldia sonlama Oláh & Malicky, 2010

9. Harpagones curving ventrally in lateral view ................................................................................. 10

– Harpagones about straight in lateral view .......................................................................................11

10. Each posterodorsal corner of segment strongly prolonged into slender, ventrally curving posterior projection ................................................................................ Wormaldia muoisan (Malicky, 1995)

– Each posterodorsal corner of segment not prolonged posteriorly Wormaldia muoiba (Malicky, 1995)

11. Tergite VIII produced posteriorly above segment IX ..................................................................... 12

– Tergite VIII not produced posteriorly above segment IX ............................................................... 16

12. In lateral view, harpagones narrowing dorsally and ventrally at mid-length .................................. 13

– In lateral view, harpagones as high at mid-length as distally of mid-length .................................. 14

13. In lateral view, segment IX longer than coxopodites ................. Wormaldia muoimot Malicky, 1995

– In lateral view, segment IX as long as coxopodites .................. Wormaldia relicta (Martynov, 1935)

14. In lateral view, harpagones narrowing along their length ................................................................... ......................................................................................... Wormaldia hephoa Oláh & Malicky, 2010

– In lateral view, harpagones equally high along their length .......................................................... 15.

15. In ventral view, harpagones narrowing along their length ...... Wormaldia muoibon (Malicky, 1995)

– In ventral view, harpagones parallel-sided along their length ...................... Wormaldia nui sp. nov.

16. In lateral view, harpagones clearly longer than coxopodites .......................................................... 17

– In lateral view, harpagones about as long as coxopodites .............................................................. 18

17. In lateral view, harpagones almost equally high along their length .................................................... ............................................................... Wormaldia montuosa Arefina-Armitage & Armitage, 2015

– In lateral view, harpagones shallower at mid-length than subapically ............................................... ............................................................................................................ Wormaldia clavella Mey, 1995

18. Phallus with three spines shorter than high of posterior part of phallus ............................................. ........................................................................................... Wormaldia daona Oláh & Malicky, 2010

– Phallus with one spine almost as long as phallus ..................... Wormaldia longicornuta Mey, 1996