Hydrometra
Creators: name: Jehamalar, E. Eyarin
name: Chandra, Kailash
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Hydrometridae
Hydrometra

description: Key to the species of Hydrometra from India
1. Abdominal tergum 8 rectangluar; sternites 7 or both 7 and 8 with setal tuft, setal patch, protuberance, thorn-like structure, dispersed long hairs (males)................................................................................ 2
- Abdominal tergum 8 sub-triangluar; sternites 7 or both 7 and 8 without any specialized characters like setal tuft, setal patch, protuberance, thorn-like structure or dispersed long hairs (females).............................................. 6
2. Males. Anteclypeus broad with anterior margin slightly concave medially, maxillary plate extending in front of anteclypeus (Fig. 2D), body dark brown to black colour. 7th sternite with a pair of setal patches near posterior region and 8th abdominal sternite with a pair of setal tuft near anterior region (Figs. 4C, 5C)............................. H. cherukolensis sp. nov.
- Anteclypeus conical, body yellow to dark brown colour....................................................... 3
3. Seventh abdominal sternite with a pair of thorn-like processes, caudal process short (Fig. 6 C-E)....... H. okinawana Drake
- Seventh abdominal sternite without thorn-like processes, but with dispersed setae or patch of setae; caudal process long.... 4
4. Seventh abdominal sternite not swollen but with transverse depression medially; sternites 6 and 7 with dispersed long setae, pronounced in segment 7 (Fig. 4E, 5E)...................................................... H. greeni Kirkaldy
- Seventh abdominal sternite swollen, with a pair of setal patches (Figs. 4A,G; 5A,G)................................. 5
5. Lateral margin of setal patch on seventh abdominal sternite lined with long curved hairs; posterior part of sixth sternite and the whole seventh abdominal sternite with dispersed setae (Figs. 4G, 5G)......................... H. nicobarensis sp. nov.
- Sixth and seventh abdominal sternites without dispersed setae, seventh abdominal sternite with a pair of small round patch of short setae and a row of little longer setae adjacent to setal patch continued postero-laterally (Figs. 4A, 5A)......................................................................................... H. butleri Hungerford and Evans
6. Females. Anteclypeus broad with anterior margin concave medially; posterior region of sternite 7 triangularly produced, partly covering gonocoxae medially, without any characteristic hairs; caudal process is straight caudad, (Figs. 3D, 4D, 5D)........................................................................................ H. cherukolensis sp. nov.
- Anteclypeus conical, posterior region of sternite 7 clothed with dense short procumbent hairs; caudal process straight caudad, ventrocaudad, slightly dorsocaudad....................................................................... 7
7. Subapex of sternite 7 with a shallow, half-circle depression; caudal process is slightly dorsocaudad, anterior margin in lateral view convexed (Figs. 4H, 5H)........................................................ H. nicobarensis sp. nov.
- Subapex of sternite 7 without any depression; caudal process is straight caudad, ventrocaudad......................... 8
8. Caudal process is ventrocaudad, posterior region of tergite 7 raised, margin bordered with short hairs (Figs. 3F, 4F, 5F)........................................................................................... H. greeni Kirkaldy
- Caudal process is straight caudad......................................................................... 9
9. Caudal process stout, with fringe of hairs (Figs. 3B, 4B, 5B)......................... H. butleri Hungerford and Evans
- Caudal process slender, without characteristic fringe of hairs................................... H. okinawana Drake
description: Published as part of Jehamalar, E. Eyarin & Chandra, Kailash, 2014, On the genus Hydrometra Latreille (Hemiptera: Heteroptera: Hydrometridae) from India with description of two new species, pp. 501-517 in Zootaxa 3779 (5) on page 502, DOI: 10.11646/zootaxa.3779.5.1, http://zenodo.org/record/227624