Identification key to species of the genus Aponema Jensen, 1978 Key created by Oleksandr Holovachov
Please refer to this identification key as Holovachov, O. (2017) Identification key to species of the genus Aponema Jensen, 1978. In: Bezerra, T.N.; Decraemer, W.; Eisendle-Flöckner, U.; Holovachov, O.; Leduc, D.; Miljutin, D.; Sharma, J.; Smol, N.; Tchesunov, A.; Mokievsky, V.; Venekey, V.; Vanreusel, A. (2018) NeMys: World Database of Free-Living Marine Nematodes. Accessed at http://nemys.ugent.be
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Characteristics
Amphid dimorphism ![Pictorial key](https://www.marinespecies.org/aphia/images/idkeys/camera1.gif) present (larger in male and smaller in female) absent (similar in size between sexes)
a-ratio ![Pictorial key](https://www.marinespecies.org/aphia/images/idkeys/camera1.gif) 10-20 20-30 30-40
Basal bulb shape ![Pictorial key](https://www.marinespecies.org/aphia/images/idkeys/camera1.gif) round or ovoid rhomboid or angular
Body length ![Pictorial key](https://www.marinespecies.org/aphia/images/idkeys/camera1.gif) 0.4-0.6 mm 0.2-0.4 mm 0.6-0.9 mm 1.1-1.3 mm
b-ratio ![Pictorial key](https://www.marinespecies.org/aphia/images/idkeys/camera1.gif) 4-5 5-6 6-7 7-8 8-9 9-10
c'-ratio ![Pictorial key](https://www.marinespecies.org/aphia/images/idkeys/camera1.gif) 3-4 4-5 5-6 6-7 7-8
c-ratio ![Pictorial key](https://www.marinespecies.org/aphia/images/idkeys/camera1.gif) 5-6 6-7 7-8 8-9 9-10
Cuticle morphology ![Pictorial key](https://www.marinespecies.org/aphia/images/idkeys/camera1.gif) with longitudinal striation without longitudinal striation
Labial region shape ![Pictorial key](https://www.marinespecies.org/aphia/images/idkeys/camera1.gif) sett off from the rest of the body continuous with the rest of the body unknown (not described)
Number of supplements ![Pictorial key](https://www.marinespecies.org/aphia/images/idkeys/camera1.gif) absent one two
Number of testes ![Pictorial key](https://www.marinespecies.org/aphia/images/idkeys/camera1.gif) two, diorchic one, monorchic unknown (not described)
Shape of gubernaculum apophysis ![Pictorial key](https://www.marinespecies.org/aphia/images/idkeys/camera1.gif) straight curved backwards, hook-shaped bent backwards at an angle
Spicule length (along arc) ![Pictorial key](https://www.marinespecies.org/aphia/images/idkeys/camera1.gif) 15-20 µm 20-25 µm 25-30 µm 30-35 µm 35-40 µm
Tail length ![Pictorial key](https://www.marinespecies.org/aphia/images/idkeys/camera1.gif) 25-50 µm 50-75 µm 75-100 µm 100-125 µm 125-150 µm 150-175 µm | Remaining taxa: Aponema abyssalis (Miljutin & Miljutina, 2009) Tchesunov, 2014
Aponema decraemerae Muthumbi & Vincx, 1999
Aponema mnazi Muthumbi & Vincx, 1999
Aponema ninae Portnova, 2009
Aponema papillatum Pastor de Ward, 1980
Aponema subtile Leduc & Wharton, 2008
Aponema torosum (Lorenzen, 1973) Jensen, 1978
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