Trochamus Boucher & De Bovée, 1971

Venekey, Virag, Gheller, Paula F., Kandratavicius, Noelia, Cunha, Beatriz Pereira, Vilas-Boas, Ana Carolina, Fonseca, Gustavo & Maria, Tatiana F., 2019, The state of the art of Chromadoridae (Nematoda, Chromadorida): a historical review, diagnoses and comments about valid and dubious genera and a list of valid species, Zootaxa 4578 (1), pp. 1-67 : 29

Genus Trochamus Boucher & De Bovée, 1971

The genus Trochamus was created by Boucher & De Bovée (1971) with the description of T. carinatus . These authors also transferred Nygmatonchus fossiferus to Trochamus , but later this species was transferred to Endeolophos by Boucher (1976). This author also described T. complexus and synonymized Nygmatonchus minimus with T. carinatus . Blome (1985) described T. prosoporus and the last additions to Trochamus were T. bulbosa and T. polki , both described by Muthumbi & Vincx (1998a), who also presented redescriptions of T. complexus and T. prosoporus . According to Muthumbi & Vincx (1998a) Trochamus can be distinguished from Nygmatonchus by the amphids (faint slit-like in the first and large conspicuous in the second), lack of cuticular differentiation at pre- and post-anal regions and simple copulatory apparatus (without telamons). Also, according to Muthumbi & Vincx (1998a), Trochamus differs from Endeolophos by having a heterogenous cuticle with complex lateral alae. T. falciformis is considered nomen nudum since it was described in a PhD thesis ( Tingting 2014).

Diagnosis (modified from Tchesunov 2014): Cuticle heterogenous, with a crest-like lateral differentiation. Six outer labial and four cephalic setae arranged in one circle. Amphideal fovea as poorly visible transversal slit. Buccal cavity armed with one dorsal tooth and two small ventrosublateral teeth. Gubernaculum without lateral pieces.

Number of valid species: 5.

Genus Trochamus Boucher & De Bovée, 1971

VALID SPECIES

1. Trochamus bulbosa Muthumbi & Vincx, 1998 (Indian Ocean)

2. Trochamus carinatus Boucher & De Bovée, 1971 (Mediterranean)

Syn. Nygmatonchus minimus Juario, 1974

3. Trochamus complexus Boucher, 1976 (West Channel)

4. Trochamus polki Muthumbi & Vincx, 1998 (Indian Ocean)

5. Trochamus prosoporus Blome, 1985 (Galapagos)

NOMEN NUDUM

1. Trochamus falciformis Tingting, 2014 ( China)