Stegelleta, Thorne, 1938, Thorne, 1938

Boström, Sven & Holovachov, Oleksandr, 2014, Descriptions of species of Stegelleta Thorne, 1938 (Nematoda, Rhabditida, Cephalobidae) from California, New Zealand and Senegal, and a revision of the genus, European Journal of Taxonomy 87, pp. 1-19 : 17

Key to species

1. Lateral field with five incisures; cuticle with over 40 longitudinal rows of blocks; labial probolae biacute apically ............................................................................................... S. tuarua Yeates, 1967

– Lateral field with three-four incisures; cuticle with 12–26 longitudinal rows of blocks; labial probolae bifurcate half of length ...................................................................................................................... 2

2. Labial probolae with minute secondary bifurcations at tips ........................... S. iketaia Yeates, 1967 – Labial probolae without minute secondary bifurcations at tips ........................................................ 3

3. Cephalic probolae in shape of acute tines present on all six lips along the primary axils; cuticle with 24–26 longitudinal rows of blocks ................................... S. arenaria Boström & Holovachov, 2012

– Cephalic probolae absent, or present only on lateral lips along the primary axils; cuticle with 12–22 longitudinal rows of blocks ............................................................................................................... 4

4. Cuticle with 22 longitudinal rows of blocks ......................................... S. georgica Bagaturija, 1973 – Cuticle with 12–16 longitudinal rows of blocks ............................................................................... 5

5. Parthenogenetic species; spermatheca 7–13 µm long; postuterine sac about 7–17 µm long ............. ............................................................................................................ S. ophioglossa Andrássy, 1967 – Amphimictic species; spermatheca 24–43 µm long; postuterine sac about 22–36 µm long ............ 6

6. Cephalic probolae absent ............................................................................. S. incisa ( Thorne, 1937) – Cephalic probolae setose, present on lateral lips only ................................ S. laterocornuta sp. nov.