title: Systematics of Mexiconema cichlasomae (Nematoda: Daniconematidae) based on sequences of SSU rDNA.
abstract: The molecular characterization of the daniconematid dracunculoid Mexiconema cichlasomae Moravec, Vidal, and Salgado-Maldonado, 1992 through the sequencing of SSU rDNA from adult individuals is presented herein. Additionally, preliminary genetic relationships of this nematode are inferred from alignment of sequences generated previously for other dracunculoids. Maximum parsimony and maximum likelihood analyses recovered identical trees. As anticipated by previous taxonomic work, M. cichlasomae is putatively closely related to skrjabillanid dracunculoids represented by Molnaria intestinalis (Dogiel and Bychovsky, 1934) and Skrjabillanus scardinii Molnár, 1966 SSU rDNA sequences, but the relationships of this newly discovered clade to other dracunculoid clades remain unresolved.
authors.affiliation: Laboratorio de Patología Acuática, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Unidad Mérida, Antigua Carretera a Progreso Km 6, Colonia Gonzalo Guerrero, CP 97310 Mérida, Yucatán, México. hhm@mda.cinvestav.mx
authors.forename: H H
authors.initials: HH
authors.lastname: Mejia-Madrid
authors.forename: M L
authors.initials: ML
authors.lastname: Aguirre-Macedo
mesh_terms: D000818:Animals; D023681:Cichlids / Q000469:parasitology; D004275:DNA, Ribosomal / Q000737:chemistry*; D017176:Dracunculoidea / Q000145:classification* / Q000235:genetics; D005393:Fish Diseases / Q000469:parasitology; D016013:Likelihood Functions; D008800:Mexico; D010802:Phylogeny; D012337:RNA, Ribosomal, 18S / Q000235:genetics; D016415:Sequence Alignment / Q000662:veterinary; D017205:Spirurida Infections / Q000469:parasitology / Q000662:veterinary
chemical_list: D004275:DNA, Ribosomal; D012337:RNA, Ribosomal, 18S