Paradraconema Allen and Noffsinger 1978

Key to species of the genus Paradraconema Allen and Noffsinger, 1978: cf., key in Allen and Noffsinger (1978) and taxonomic discussion in Rho & Kim (2005).

1. Male with elongate loop-shaped or elongate uni-spiral amphids. Female with elongate loop-shaped or uni-spiral amphids.. 2

- Male with doubled elongate spiral amphids. Female with doubled circular or elongate spiral amphids.................. 10

2. Male and female with longitudinally areolated annules on swollen pharyngeal region............................... 3

- Male and female without longitudinally areolated annules on swollen pharyngeal region............................. 7

3. Male with precloacal Acan-set or Corn-set. Female with 15–20 SvAT............................................ 4

- Male without precloacal Acan-set or Corn-set. Female with 24–30 SvAT................................ P. spinosum

4. Male with 1 subventral pair of precloacal Acan-set. Female with 12–14 SlAT...................................... 5

- Male with single ventral precloacal Corn-set. Female with 17–18 SlAT.................................... P. hopperi

5. Male and female with prominent eyespots................................................................. 6

- Male and female with obscure eyespots........................................................ P. singaporense

6. Male with cylindrical cloacal region and conical tail gradually narrowing................................ P. floridense

- Male with remarkably enlarged cloacal region and conico-cylindrical tail abruptly narrowing...... P. pachylumbus sp. nov.

7. Male and female with Ceph Acan-set on posterior 1/3 of rostrum............................................... 8

- Male and female with Ceph Acan-set about mid-rostrum...................................................... 9

8. Male with single ventral precloacal Corn-set. Female with elongate loop-shaped amphids................. P. meridionale

- Male with 1 subventral pair of precloacal Corn-set. Female with uni-spiral amphids.......................... P. newelli

9. Male with single ventral precloacal Acan-set. Female with 21–22 SvAT............................... P. californicum

- Male without precloacal Acan-set or Corn-set. Female with 15–18 SvAT................................ P. maggentii

10. Male and female with 1 pair of Ceph Acan-set and no eyespots......................................... P. jejuense

- Male and female with 2 pairs of Ceph Acan-set and prominent eyespots............................... P. antarcticum