Caligus mulli Rodrigues, Özak, Silva & Boxshall, 2018
|
publication ID |
https://doi.org/10.11646/zootaxa.5686.2.1 |
|
publication LSID |
lsid:zoobank.org:pub:FAE3CA10-9DC4-45E0-819E-6F3A02CE7F20 |
|
DOI |
https://doi.org/10.5281/zenodo.16987330 |
|
persistent identifier |
https://treatment.plazi.org/id/5E1F87E2-6C6F-9A04-FF6D-FE7BFDF8F9A4 |
|
treatment provided by |
Plazi |
|
scientific name |
Caligus mulli Rodrigues, Özak, Silva & Boxshall, 2018 |
| status |
|
Caligus mulli Rodrigues, Özak, Silva & Boxshall, 2018 View in CoL
( Figs 29A View FIGURE 29 – 30C View FIGURE 30 )
Hosts: Thyrsites atun (Euphrasen) ( Gempylidae : Scombriformes); Katsuwonus pelamis (Linnaeus) ( Scombridae : Scombriformes)
Locality: Off east coast South Africa (Indian Ocean)— K. pelamis ; off west coast South Africa (Atlantic Ocean)— T. atun
Material examined: 7♀
Material collected: 6♀ from T. atun ; and 1♀ from K. pelamis
Voucher material: 2♀ ( SAMC-A099213 ) from T. atun deposited in the Iziko South African Museum , Cape Town, South Africa .
Adult female ( Fig. 29A View FIGURE 29 ) genital complex about 1.5 times longer than wide, posterolateral corners lobate; abdomen small, 1-segmented; antenna (a2) with tapering proximal process (arrowed), claw strongly curved ( Fig. 29B View FIGURE 29 ); post-antennal process (pap) tine slightly curved with outer flange ( Fig. 29B View FIGURE 29 ); maxillule with dentiform posterior process (mpp) almost straight with blunt tip surrounded by marginal flange ( Fig. 29C View FIGURE 29 ); sternal furca with divergent, blunt-ended tines slightly curved inwards distally, surrounded by marginal flange ( Fig. 29D View FIGURE 29 ); leg 1 last exopodal segment with 3 posterior pinnate setae (ps), terminal seta 4 (4) longer than terminal spines 1–3, shorter than segment ( Fig. 29E View FIGURE 29 ); leg 2 exopod segment 1 and 2 distolateral spines (arrowed) obliquely over surface of ramus ( Fig. 29F View FIGURE 29 ), endopodal segments 1 and 2 with setules (arrowed) along outer margins ( Fig. 30A View FIGURE 30 ); leg 3 exopodal segment 1 distolateral spine (ds) almost straight, shorter than segment 2 ( Fig. 30B View FIGURE 30 ); leg 4 3-segmented with I, IV spines, medial terminal spine (IV) about twice as long as distolateral spine (II) ( Fig. 30C View FIGURE 30 ) (cf. Rodrigues et al. 2018; Özak pers. comm.).
Remarks: This species shares features with the C. bonito -group of species, but with setules on the outer margins of the leg 2 second segment rather than large denticles or spinules and with the proximal process on the antenna well-developed.
The reported body length of C. mulli is about 2.72 mm ( Rodrigues et al. 2018) while the current examined specimens are larger and about 4.2 mm. Additionally, the post-antennal process tine, maxillule dentiform posterior process and the sternal furca tines are all surrounded by conspicuous marginal flanges while the sternal furca tines are slightly more divergent with the tips less incurving. Furthermore, the spine on the first exopodal segment of leg 3 is slightly curved, rather than straight.
Caligus mulli was described from Mullus spp. ( Mullidae :Mulliformes) while the current specimens were collected from hosts belonging to Scombriformes. Thus, this constitutes new host records for the species. Additionally, this is also the first record off South Africa.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.