Wellsopsyllus,

Back, Jinwook & Lee, Wonchoel, 2014, Two new species of the genus Wellsopsyllus (Copepoda; Harpacticoida; Paramesochridae) from the Yellow Sea, Zootaxa 3895 (3), pp. 346-366: 364

publication ID

http://dx.doi.org/10.11646/zootaxa.3895.3.2

publication LSID

lsid:zoobank.org:pub:44081058-1ACC-4DFE-AF20-096062256345

persistent identifier

http://treatment.plazi.org/id/DB0B5C67-FF88-FFFC-CBA1-FEC41DA18AF4

treatment provided by

Plazi

scientific name

Wellsopsyllus
status

 

Key to species of the genus Wellsopsyllus 

The tabular keys reported by Wells (2007) represent the latest key for the genus Wellsopsyllus  . The keys to the species of subgenera Scottopsyllus  and Intermediopsyllus  by Kunz (1962) and Lang (1965) are also available. Since the study by Wells (2007), five species (including the two new species reported here) have been described. In addition, Wells’ key contains an error in the couplets leading to S. (S.) praecipuus ( Veit-Köhler, 2000)  . Specifically, Veit-Köhler (2000) described the S. (S.) praecipuus  A 2 exp as having 5 setae/spines (See Veit-Köhler, 2000, p. 11, fig. 6 A), and not 3 setae/spines as reported in Wells’ key (see Wells, 2007, p. 581). Lastly, because of the doubtful nature of the description of W. (S.) minor  by T & A Scott (1895), this species is not included in the key. Our key is based on female characters.

1. P 4 exp 2 -segmented......................................................... (subgenus Intermediopsyllus  )... 2

- P 4 exp 3 -segmented................................................................................... 5

2. P 2 –P 3 exp- 3 with 3 setae/spines.............................................................. W. (I.) antoniae 

- P 2 –P 3 exp- 3 with 2 setae/spines.......................................................................... 3

3. P 2 –P 4 enp represented by small process........................................................ W. (I.) smirnovi 

- P 2 –P 4 enp 1 –segmented; P 4 enp- 1 with 1 stout seta.......................................................... 4

4. P 5 exp separated from benp, armed with 3 setae; baseoendopodal lobe with 2 small setae.............. W. (I.). intermedius  i

- P 5 exp fused with benp, armed with 2 setae; baseoendopodal lobe with 1 small seta...................... W. (I.) minutus 

5. P 4 enp 1 -segmented....................................................... (subgenus Wellsopsyllus  )....... 6

- P 4 enp 2 -segmented...................................................... (subgenus Scottopsyllus  )....... 10

6. P 1 enp- 2 with 2 setae................................................................... W. (W.) antarcticus 

- P 1 enp- 2 with 1 seta.................................................................................. 7

7. A 2 exp with 3 setae.......................................................................... W. (W.) gigas 

- A 2 exp with 4 setae................................................................................... 8

8. P 2 –P 3 enp represented by a small process; caudal seta IV and VI bump-like setae; well-developed outer process of P 5 benp................................................................................. W. (W.) egregius  . sp. nov.

- These characters not combined.......................................................................... 9

9. P 5 benp with 1 long inner seta and 1 short outer seta; width:length ratio of caudal rami about 1: 2.5 ....... W. (W.) abyssalis 

- P 5 benp with 2 short setae; width:length ratio of caudal rami about 3: 4 ................................ W. (W.) runtzi 

10. P 1 basis with 5 long inner setules........................................................................ 11

- P 1 basis without long setules.......................................................................... 15

11. A 2 exp with 4 setae................................................................................. 12

- A 2 exp with 5 setae................................................................................. 13

12. P 5 benp with 1 long inner seta and 2 short outer setae; male P 5 exp with 2 setae................. W. (S.) pararobertsoni 

- P 5 benp with 2 short setae; male P 5 exp with 3 setae..................................... W. (S.) koreanus  sp. nov.

13. A 2 exp with 5 subequal length setae; P 5 benp with 1 long inner seta and 1 short outer seta; width:length ratio of caudal rami about 1: 3 .............................................................................. W. (S.) robertosni 

- These characters not combined......................................................................... 14

14. Articulation between P 4 exp- 1 and exp- 2 not clearly demarcated...................................... W. (S.) langi 

- P 4 exp clearly 3 -segmented......................................................... W. (S.) langi continentalis 

15. A 2 exp with 4 setae...................................................................... W. (S.) herdmani 

- A 2 exp with 5 setae................................................................................. 16

16. P 1 enp- 2 with 1 seta..................................................................... W. (S.) praecipuus 

- P 1 enp- 2 with 2 setae..................................................................... W. (S.) depressus