Belbolla, Andrassy, 1973

Huang, Y. & Zhang, Z. N., 2005, Three new species of the genus Belbolla (Nematoda: Enoplida: Enchelidiidae) from the Yellow Sea, China, Journal of Natural History 39 (20), pp. 1689-1703 : 1701-1702

Key for the determination of 12 species of the genus Belbolla

1 Precloacal supplements absent...... B. asupplementata (Juario, 1974)

– Precloacal supplements present............... 2

2 Seven oesophageal bulbs................. 3

– Eight, nine or 10 oesophageal bulbs.............. 4

3 Precloacal supplements well developed, appearing winged; apophysis of guberna- culums absent............ B. heptabulba (Timm, 1961)

– Precloacal supplements reduced, in long pocked-shaped structure; apophysis of gubernaculums present........... B. warwicki sp. nov.

4 Eight oesophageal bulbs................. 5

– Nine or 10 oesophageal bulbs.............. 10

5 Length of the apophysis longer than half spicule length........ 6

– Length of the apophysis shorter than half spicule length........ 7

6 Supplements long (1.4–1.5 a.b.d.)...... B. tenuidens (Cobb, 1920)

– Supplements short (0.5–0.9 a.b.d.)....... B. zhangi ( Guo, 2001)

7 Spicule with swollen distal tip........ B. stenocephalum sp. nov.

– Spicule with tapered distal tip............... 8

8 Posterior supplement distant from the proximal ends of the spicule by less than one length of spicule; the apophysis about one-third of the spicule length................ B. teissieri (Luc and de Conink, 1959)

– Posterior supplement distant from the proximal ends of the spicule by more than one length of spicule; the apophysis about one-fifth to one-sixth of the spicule length...................... 9

9 Length of the supplement wing almost equal to the diameter of its central part............ B. sundoensis (Micoletzky, 1930)

– Length of the supplement wing twice the diameter of its central part................... B. gallanachmorae (Inglis, 1961)

10 Spicule with a hook at the distal end B. intarma ( Belogurov and Belogurova, 1980)

– Spicule without a hook at the distal end........... 11

11 Length of the gubernacular apophysis 21 mm; females with 10 oesophageal bulbs............... B. californica (Allgen, 1951)

– Length of the gubernacular apophysis longer than 45 mm; females with nine oesophageal bulbs............ B. huanghaiensis sp. nov.