Pseudaraeolaimus Chitwood 1951

Key to species of Pseudaraeolaimus Chitwood, 1951

See Table 3 for additional diagnostic characters.

1. Body 2 mm long; amphidial fovea with transverse striation............................................................................................................................................................. P. laminata (Vitiello, 1972) comb. nov.

– Body shorter than 1.5 mm long; amphidial fovea without transverse striation................................ 2

2. Ocelli present.................................................................................................. P. ocellatus Kito, 1981

– Ocelli absent..................................................................................................................................... 3

3. Amphidial fovea a broad loop, less than 1.5 times long as it is wide... P. perplexus Chitwood, 1951

– Amphidial fovea a narrow loop, more than 3 times long as it is wide............................................. 4

* – not available, specimens of particular sex are unknown

4. Cervical setae short, only two pairs at level with amphidial fovea....................................................................................................................................... P. cassidaigniensis (Vitiello, 1972) comb. nov.

– Cervical setae long, two pairs at level with amphidial fovea and 4–5 pairs at level with midpharynx.................................................................... P. cylindricauda (Allgén, 1932) comb. nov.