Angursa, Pollock, 1979

Fujimoto, Shinta & Hansen, Jesper Guldberg, 2019, Revision of Angursa (Arthrotardigrada: Styraconyxidae) with the description of a new species from Japan, European Journal of Taxonomy 510, pp. 1-19 : 13

Identification key to Angursa species

1. Club-shaped primary clavae longer than lateral cirri ........................................ 2 ( A. bicuspis group)

– Bulbous primary clavae shorter than lateral cirri ...........................................6 ( A. lanceolata group)

2. Well developed anal papillae ..................................................................... A. bicuspis Pollock, 1979

– Anal papillae absent........................................................................................................................... 3

3. Legs II and III sensory organs present; spiral seminal receptacle ducts........ A. clavifera Noda, 1985

– Leg II and III sensory organs absent.................................................................................................. 4

4. Three-lobed tertiary clavae; D-shaped secondary clavae; seminal receptacles present ...................... ..................................................................................................................... A. seisuimaruae sp. nov.

– Tertiary clavae with no indentation or only slightly indented around external cirri.......................... 5

5. Secondary clavae situated close together (ca 3 μm); short (10 μm) cirrus E ...................................... .................................................................................................... A. abyssalis Renaud-Mornant, 1981

– Secondary clavae situated apart (ca 9 μm); long (19 μm) cirrus E............... A. capsula Bussau, 1992

6. Leg IV sensory organs as papillae enveloped in hemispherical sheaths; cirri E with annulated scapi ............................................................................................ A. antarctica Villora-Moreno, 1998

– Leg IV sensory organs as elongate papillae....................................................................................... 7

7. Cirri E lance-shaped ................................................................ A. lanceolata Renaud-Mornant, 1981

– Cirri E tongue-shaped ..................................................................................... A. lingua Bussau, 1992