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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 Perepsilonema Lorenzen, 1973
Key created by Oleksandr Holovachov
Please refer to this identification key as Holovachov, O. (2018) Identification key to species of the genus Perepsilonema Lorenzen, 1973. 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
 Number of body annules (counted along the subdorsal body sector) 
 90-120
121-150
Ornamentation of annules
absent, cuticle smooth
with vacuoles
with striae or ridges, without spiny protruding end
Body length
200-250 µm
250-300 µm
300-350 µm
350-400 µm
400-450 µm
450-500 µm
less than 200 µm
Number of subcephalic setae in female (pairs)
six (three pairs)
eight (four pairs)
Number of subcephalic setae in male (pairs)
six (three pairs)
eight (four pairs)
Amphid shape (female)
spiral
cryptospiral
Amphid shape (male)
spiral
cryptospiral
loop-shaped
pore-like
Subdorsal spines on tal
absent
arranged in two longitudinal subdorsal rows
arranged in multiple transverse rows in each subdorsal sector
Spicule length (along the median line / arc)
20-30 µm
30-40 µm
40-50 µm
50-60 µm
>60 µm
Spicule shape
arcuate
semicircular
Cloacal tube
absent / indistinct
present / obvious
Copulatory thorns in the cloalcal region (anal thorns)
absent
two subventral
three subventral pairs
Copulatory thorns at the level of spicules
absent
two pairs in two distinct groups
2-5 pairs arranged in continuous subventral rows
10 pairs arranged in continuous subventral rows
Copulatory thorns at the level of ambulatory setae
absent
2-4 pairs arranged in continuous subventral rows
6-8 pairs arranged in continuous subventral rows
3+1 pairs arranged in continuous subventral rows, + one midventral unpaired
1+(3-5) pairs arranged in continuous subventral rows
| Remaining taxa:
Perepsilonema bahiae (Gerlach, 1957) Lorenzen, 1973
Perepsilonema benguelae Hendricks & Gibbons, 2010
Perepsilonema conifer Lorenzen, 1973
Perepsilonema coomansi Vanreusel & Vincx, 1986
Perepsilonema corsicum Vanreusel & Vincx, 1986
Perepsilonema crassum Lorenzen, 1973
Perepsilonema kellyae Gourbault & Decraemer, 1988
Perepsilonema longispiculosum Vanreusel & Vincx, 1986
Perepsilonema mediterraneum Vanreusel & Vincx, 1986
Perepsilonema moineaui Gourbault & Decraemer, 1992
Perepsilonema papulosum Lorenzen, 1973
Perepsilonema ritae Verschelde & Vincx, 1994
Perepsilonema trauci Lorenzen, 1973
Perepsilonema tubuligerum Gourbault & Decraemer, 1988
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Page generated 2024-12-13 · contact: Tânia Nara Bezerra or info@marinespecies.org
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