Prohydrometra, D. Polhemus, 2022

Polhemus, Dan A., 2022, Two new genera and six new species of Terrestrial Hydrometridae (Hemiptera: Heteroptera) from French Polynesia, Zootaxa 5190 (1), pp. 69-98 : 78

Key to the species of Prohydrometra

This key is based primarily on male specimens, except for P. englundi for which the male is unknown.

1. Head and thorax bearing numerous long, erect, pale setae ( Figs. 12, 13 ); male unknown; Raiatea........ .. P. englundi n. sp.

- Head and thorax lacking long, erect pale setae, bearing only short, dark, bristly setae; Raiatea, Moorea or Tahiti.......... 2

2. Male abdominal sternum VII bearing paired lines or patches of black bristles, lacking sclerotized or hook-like processes ( Figs. 22–24 ).............................................................................................. 3

- Male abdominal sternum VII bearing paired sclerotized and hook-like processes, which may in some cases possess distal bristles ( Figs. 19–21 ).................................................................................. 5

3. Patches of bristle-like setae on male abdominal sternum VII small and set close together ( Fig. 22 ); Tahiti (Tahiti Iti)............................................................................................... P. teatara n. sp.

- Patches of bristle-like setae on male abdominal sternum VII larger and more widely separated ( Figs. 23, 24 ); Raiatea or Moorea..............................................................................................4

4. Patches of bristle-like setae on male abdominal sternum VII elongate, well removed from anterior margin ( Fig. 23 ); Moorea........................................................................................ .. P. tohiea n. sp.

- Patches of bristle-like setae on male abdominal sternum VII short and triangular, arising closer to anterior margin ( Fig. 24 ); Raiatea............................................................................. P. johnpolhemi n. sp.

5 Paired processes on male abdominal sternum VII widely separated, with bristles at tips ( Fig. 21 ); Moorea... P. moorea n. sp.

- Paired processes on male abdominal sternum VII set closer together, lacking bristles at tips ( Figs. 19, 20 ); Tahiti................................................................................. P. gagnei J. Polhemus & D. Polhemus

Figures

FIGURES 12–15. Prohydrometra englundi n. sp., female, morphological details. 12. Head, dorsal view, with positions of cephalic trichobothria indicated. 13. Ventral left thorax, showing coxal spacing. 14. Terminal abdomen, ventral view. 15. Left foreleg, ventral view. Specimen from French Polynesia, Raiatea, Mt. Toomaru.

FIGURES 19–24. Prohydrometra n. gen. species, male ventral terminal abdomen. 19. P. gagnei, specimen from Tahiti, Mt. Marau. 20. P. gagnei, specimen from Tahiti, Mt. Mauru, showing yellowish-brown coloration. 21. P. moorea n. sp., specimen from Moorea, Mt. Tohiea. 22. P. teatara n. sp., specimen from Tahiti, Mts. Teatara. 23. P. tohiea n. sp., holotype, specimen from Moorea, Mt. Tohiea. 24. P. johnpolhemi n. sp., specimen from Raiatea, Trois Cascade.