Family Thoracostomopsidae
Revised
04/01/22
Nematoda
Enoplea
Enoplia
Enoplida
Enoplina
Enoploidea
Thoracostomopsidae
Filijev, 1927,
Lorenzen, 1981
- A family of predatory marine nematodes that commonly inhabit littoral
and shallow sub-littoral habitats.
- Buccal cavity conical with one dorsal and two sub-ventral lips and armed
with powerful jaws.
- Jaws formed by three mandibular plates, each with a forwardly directed
onchium (tooth).
- Pharyngeal muscles are attached anteriorly to the cephalic cuticle to
form a cephqlic capsule.
- Labial sensilla are setiform.
- Smooth cuticle,
- Metanemes, (filamentous organs located in or near
lateral hypodermal chord, characteristic of Enoplida)
- Non-spiral amphideal fovea.
from Nicholas (2007)
Additional diagnostic description by Vailas-Boas et al., 2015:
- Three prominent lips.
- Setiform inner labial setae (papilliform only in Fenestrolaimus);
outer labial and cephalic setae robust and long.
- Cephalic organs are usually present, situated frontally or
ventro-frontally in relation to the lateral cephalic setae.
- Non-spiral, small amphidial fovea located posterior to the cephalic
capsule
- The inner layer of the cuticle forms a cephalic capsule to which the
pharyngeal muscles are attached.
- Buccal cavity, conical, tapered, with three jaws and three conical teeth
associated with the base of the jaws (one
dorsal and two
ventrosublateral) or a long eversible spear in subfamily
Thoracostomopsinae..
- Only dorsolateral orthometanemes with a robust scapulus but
without caudal filament.
- Female reproductive system is didelphic-amphidelphic, with antidromously
reflexed ovaries.
- Caudal glands located in the pre-caudal region.
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References
Andrassy, I. 2009. Free-living Nematodes of Hungary
(Nematoda Errantia) Vol. 111. Humgarian Natural History Museum, Budapest.
508p.
Lorenzen, S. 1994. The phylogenetic sistematics of freeliving nematodes.
London, The Ray Society, 383p.
Nicholas, W.L. 2007. A new species of Trileptium (Nematoda,
Thoracostomopsidae) from a sandy beach in southeastern Australia, with a key to
species and observations on geographical distribution. New Zealand Journal
of Marine and Freshwater Research 41: 335-344.
Vilas-Boas, A.C., da Silva, M.C., de Souza Alves, O.F., de Castro, F.J.V.,
Pinheiro-Junior, E.P. 2015. A new species of Trileptium (Nematoda:
Thoracostomopsidae) from Bahia, Brazil. Zoologia 33(1): e20150043 | DOI:
10.1590/S1984-4689zool-20150043
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