Mesacanthion Filipjev, 1927

Russo, Virginia Lo & Pastor De Ward, Catalina T., 2021, Three new species of Mesacanthion Filipjev, 1927 (Nematoda: Thoracostomopsidae) from Argentine coasts, European Journal of Taxonomy 787, pp. 17-31 : 19

Genus Mesacanthion Filipjev, 1927

Type species

Mesacanthion lucifer ( Filipjev, 1927) Gerlach & Riemann, 1974

Diagnosis (after Jeong et al. 2019)

Outer labial and cephalic setae situated at middle or anterior end of cephalic capsule. Mandibles welldeveloped, provided with claws, arch-shaped, each consisting of two rod-like columns anteriorly united by a curved bar. Teeth shorter than mandibles. Spicule mostly short, unipartite and symmetrical, sometimes long, bipartite (divided by a seam: M. ditlevseni ( Filipjev, 1927) Gerlach & Riemann, 1974) and asymmetrical (anisomorphic and anisometric: M. diplechma (Southern, 1914) Filipjev, 1927). If long, usually gubernaculum present with caudal apophysis. Marine and freshwater.