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The World of Protozoa, Rotifera, Nematoda and Oligochaeta

Paracriconema

Paracriconema Ebsary, 1981 (ref. ID; 5958 original paper)

ref. ID; 5958

Diagnosis

Female body 0.34-0.54 mm. Annules 49-74, 6-10 µm thick, smooth, rounded or retrorse. Head annules one or two, set off; if two, first wider than second, separated. Lip region elevated, round. Pseudolips present. Stylet 51-84 µm, rigid. Vulva closed. Tail four to eight annules, rounded conical, VL/VB=1(0.7-1.1). (ref. ID; 5958)
  • Juveniles (male and female fourth stage): Annules with 8-14 rows of smooth scales. Stylet present. (ref. ID; 5958)
  • Males: Lateral incisures four, bursa absent. (ref. ID; 5958)

    Differential diagnosis

    Paracriconema n. gen. differs from Nothocriconema by the rounded conical tail of four to eight annules, VL/VB=1(0.7-1.1) (conical pointed tail of 8-15 annules, VL/VB=1.5(1.1-2) in Nothocriconema) and by the juveniles with smooth scales (scales spine-tipped in Nothocriconema). (ref. ID; 5958)

    Type species

    Paracriconema lamellatum (Raski & Golden, 1966) n. comb. (ref. ID; 5958)
    1. Paracriconema dubium (DeGrisse, 1967) n. comb. (ref. ID; 5958)
      Syn; Nothocriconema dubium DeGrisse, 1967 (ref. ID; 5958)
    2. Paracriconema duplicivestitum (Andrassy, 1963) n. comb. (ref. ID; 5958)
      Syn; Nothocriconema duplicivestitum (Andrassy, 1963) DeGrisse & Loof, 1965 (ref. ID; 5958)
    3. Paracriconema lamellatum (Raski & Golden, 1966) n. comb. (ref. ID; 5958)
      Syn; Nothocriconema lamellatum (Raski & Golden, 1966) DeGrisse, 1967 (ref. ID; 5958)
    4. Paracriconema rarum (Boonduang & Ratanaprapa, 1974) n. comb. (ref. ID; 5958)
      Syn; Lobocriconema rarum Boonduang & Ratanaprapa, 1974 (ref. ID; 5958)
    5. Paracriconema solitarium (DeGrisse, 1967) n. comb. (ref. ID; 5958)
      Syn; Nothocriconema solitarium DeGrisse, 1967 (ref. ID; 5958)