Neelipleona

Key to the genera of Neelipleona

1. Ant. III and IV separate, not fused........................................................................2

- Ant. III and IV fused................................................................................... 4

2. Neck visible; sensory fields on head and trunk reduced, edges unclear without inner chaetae; antennae short, bulk and pointed anteriorly, precoxal lobes present on Th. II and Th. III; articular process of the manubrium with simple concave tip; tenaculum with 2 + 2 teeth...................................................................... Neelides Caroli, 1912

- Neck unclear; sensory fields well delimited with inner swollen chaetae; antennae slender pointed laterally; precoxal lobe absent on Th. II, possibly present on Th. III; articular process of the manubrium with simple convex tip or bilobate tip; tenaculum with 3 + 3 or 4 + 4 teeth.............................................................................3

3. Integument with coarse secondary granulation, dermastra absent; labrum ordinary without modification of anterior chaetae and without anterior process; sensory fields with globular inner chaetae; articular process of the manubrium with double convex tips; tenaculum with 4 + 4 teeth........................................ Acanthoneelidus Bretfeld & Griegel, 2006

- Integument without secondary granulation, dermastra present; sensory fields with flam-shaped inner chaetae; labrum with thick and modified anterior chaetae and with anterior process; articular process of the manubrium with simple convex tip; tenaculum with 3 + 3 teeth................................................................. Neelus Folsom, 1896

4. Both a- and m-row of chaetae present on labrum.............................................................5

- Labrum anterior process with only one row of chaetae instead of a- and m-rows............................................................................................ Zelandothorax Delamare Deboutteville & Massoud, 1963

5. Proximal and distal part of dens separated with suture line and anterior articular process; 2 + 2 neosminthuroid chaetae; Ant. II with only one verticil of chaetae.................................................... Megalothorax Willem, 1900

- Proximal and distal part of dens not separated, without articular process; 1 + 1 neosminthuroid chaetae; Ant. II chaetae in two verticils......................................................... Spinaethorax Papáč & Palacios-Vargas, 2016