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The Status of the Genera and Subfamilies of the Criconematidae (Nematoda); With a Comment On the Position of Fergusobia

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Caloosia n.g. is erected to contain Hemicycliophora longicaudata Loos, 1948 (type) and C. paralongicaudata nom. nov., syn. H. longicaudata of Siddiqi, 1961. Hemicriconemoides strictathecatus Esser, 1960 has anteriorly-concave spear knobs and thus Hemicriconemoides together with Criconema and Criconemoides constitutes the Criconematinae. Paratylenchidae is not recognised as a family and Gracilacus Raski, 1962 is reduced to synonymy with Paratylenchus, a group in which the basal knobs of the spear are spheroid and slope backwards. Hemicycliophora and Caloosia are placed in Hemicycliophorinae Skarbilovich, 1959. The male of Iota squamosum Cobb, 1913 seems to belong to Hemicriconemoides, with H. mangiferae Siddiqi, 1961 and H. strictathecatus Esser, 1960 as synonyms. Criconema is probably a genus without males. Macroposthonia seems to be most closely related to Criconemoides. Fergusobia is removed from the Allantonematidae and is placed within the Fergusobidae n. fam. close to the Criconematidae.

Affiliations: 1: Rothamsted Experimental Station, Harpenden, England


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