Hypogastrura

Key of Hypogastrura species recorded from India

1. Abd VI without anal spines............................................................................. 2

- Abd VI with anal spines................................................................................ 3

2. Tibiotarsi without knobbed tenant hairs. Mucro rounded apically....................................... H. sonapani

- Tibiotarsi with one knobbed tenant hair. Mucro long, pointed..................................... H. temarpurensis

3. Tibiotarsi with more than one knobbed tenent hair. Retinaculum with 3+3 teeth............................. H. viatica

- Tibiotarsi with one knobbed tenent hair. Retinaculum with 4+4 teeth............................................ 4

4. Labrum without distal papillae. Ant IV with poorly differentiated sensilla. Ventral tube with 4+4 chaetae. Empodial appendage lance-shaped, with narrow basal lamella................................................. manubrialis group … 5

- Labrum with 4-6 papillae. Ant IV with well differentiated sensilla. Ventral tube with more than 4+4 chaetae. Empodial appendage with broad basal lamella............................................................................ 9

5. Abd V with 3 rows of chaetae (some m chaetae present)....................................................... 6

- Abd V with 2 rows of chaetae (without m chaetae)........................................................... 7

6. Th II without m2 chaetae. Mucro with straight outer lamella and small subapical tooth................... H. unguiculata

- Th II with m2 chaetae. Mucro with rounded outer lamella and without subapical tooth............ H. satkosiaensis sp. nov.

7. Mucro slightly curved, not longer than 2/3 dens, with broad outer lamella. Th II with m2 chaetae............. H. rangkuli

- Mucro straight and long (up to ½ dens) without distinct lamellae. Th II without m2 chaetae.......................... 8

8. Abd VI elongated, with anal spines far before the posterior margin. Distal margin of labrum with a broad, rounded apical swelling.................................................................................... H. consanguinea

- Abd VI normal, with anal spines in the posterior margin. Distal margin of labrum with a small, narrow lobe. H. manubrialis

9. Dens with tooth-like granules in distal part and prominent ventro-apical swelling, mucro with distinct subapical tooth.......................................................................................... nivicola group‒ ‒10

- Dens without tooth-like granules and prominent ventro-apical swelling, mucro without distinct subapical tooth........................................................................................ sahlbergi group‒ ‒ H. prabhoi

10. Abd IV with m1 chaetae. Length of anal spines at least ½ length of inner unguis........................... H. harveyi

- Abd IV without m1 chaetae. Length of anal spines less than ½ that of inner unguis......................... H. nivicola