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World Database of Nematodes Linked to the Marine Biology Section, UGent
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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
 Body length 
 0.4-0.6 mm
0.2-0.4 mm
0.6-0.9 mm
1.1-1.3 mm
Cuticle morphology
with longitudinal striation
without longitudinal striation
Amphid dimorphism
present (larger in male and smaller in female)
absent (similar in size between sexes)
Basal bulb shape
round or ovoid
rhomboid or angular
Labial region shape
sett off from the rest of the body
continuous with the rest of the body
unknown (not described)
Number of testes
two, diorchic
one, monorchic
unknown (not described)
Number of supplements
absent
one
two
Shape of gubernaculum apophysis
straight
curved backwards, hook-shaped
bent backwards at an angle
Spicule length (along arc)
15-20 µm
20-25 µm
25-30 µm
30-35 µm
35-40 µm
a-ratio
10-20
20-30
30-40
b-ratio
4-5
5-6
6-7
7-8
8-9
9-10
c-ratio
5-6
6-7
7-8
8-9
9-10
c'-ratio
3-4
4-5
5-6
6-7
7-8
Tail length
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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Page generated 2025-01-23 · contact: Tânia Nara Bezerra or info@marinespecies.org
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