Caligus longipedis Bassett-Smith, 1898

Boxshall, Geoff, 2018, The sea lice (Copepoda: Caligidae) of Moreton Bay (Queensland, Australia), with descriptions of thirteen new species, Zootaxa 4398 (1), pp. 1-172: 82

publication ID

https://doi.org/10.11646/zootaxa.4398.1.1

publication LSID

lsid:zoobank.org:pub:79E3EB78-D1C3-45CF-AB13-F8E61C936252

persistent identifier

http://treatment.plazi.org/id/03B587F2-AA3C-4D79-B6F8-FF7C39EBF8B1

treatment provided by

Plazi

scientific name

Caligus longipedis Bassett-Smith, 1898
status

 

Caligus longipedis Bassett-Smith, 1898  

( Fig. 35 View FIGURE 35 )

Syn: Caligus lucidus Heegaard, 1962  

Material examined. 1♀ from Gerres sp.   juveniles (caught by seine net from shore at Adams Beach, North Stradbroke Island) on 26 June 2016, QM Reg. No. W53080 View Materials .  

Site on host. Body surface.

Differential diagnosis. Cephalothorax dorsoventrally flattened with slightly irregular lateral margins ( Fig. 35A View FIGURE 35 ) bearing well-developed marginal membranes; frontal plates with well-developed lunules. Genital complex about 1.6 times wider than long, produced into slight postero-lateral lobes; abdomen 1-segmented, about 1.3 times longer than wide; genital complex about 2.0 times longer than abdomen. Caudal rami about 2 times longer than wide. Antenna with posterior process ( Fig. 35B View FIGURE 35 ) on proximal segment; distal subchela with striations on surface. Post-antennal process weakly curved; associated papillae unisensillate, sensillae long ( Fig. 35C View FIGURE 35 ). Posterior process of maxillule simple, ornamented with surface striations ( Fig. 35D View FIGURE 35 ). Maxilla with distal margin of brachium spinulate ( Fig. 35E View FIGURE 35 ). Maxilliped of female with smooth myxal margin and short claw on subchela. Sternal furca with short, spatulate tines ( Fig. 35F View FIGURE 35 ). Distal exopodal segment of leg 1 with 3 plumose setae on posterior margin; distal spine 1 simple and slightly shorter than other spines; spines 2 and 3 each with accessory process; seta 4 about 1.4 times longer than spines 2 and 3. Leg 2 with patches of setules extending onto surface of endopodal segment 2; segment 3 with raised patch of setules and 2 striated crescentic membranes on surface ( Fig. 35G View FIGURE 35 ); outer spines on exopodal segments 1 and 2 aligned obliquely across surface of ramus. Leg 3 exopod 3-segmented; first segment with short almost straight spine ornamented with lateral strip of membrane and ornamented with membranous flange along outer margin, lacking inner seta. Leg 4 uniramous, 3-segmented ( Fig. 35H View FIGURE 35 ); exopodal segments 1 and 2 with I and III long spines, respectively, each ornamented with narrow strips of smooth membrane. Body length of female 5.36 mm.

Remarks. This is a large and distinctive species of Caligus   readily characterized by the possession of posterolateral lobes on the female genital complex, in combination with the elongate spines on the exopod of leg 4, the spatulate tines of the sternal furca, the ornamentation of the distal margin of the maxilla and the presence of crescentic membranes on the third segment of the endopod of leg 2. The male described by Ho & Lin (2004) is not conspecific with the female; the true male of C. longipedis   was redescribed by Venmathi Maran et al. (2009).

Caligus longipedis   is widely distributed: having been reported from across the Atlantic and the Indo-Pacific, including from Aden (Bassett-Smith, 1898a), Belize (Cressey, 1991), Mexico ( Shiino, 1959, as C. amplifurcus Pearse, 1953   ; Morales-Serna et al., 2014), Florida ( USA) ( Pearse, 1953, as C. amplifurcus   ), Hawaii (Lewis, 1967), India (Gnanamuthu, 1950, as C. scabiei   ), Japan (Kubota & Takakuwa, 1963), Korea ( Moon & Kim, 2012), Malaysia ( Venmathi Maran et al., 2009), and Taiwan (Ho & Lin, 2004). This species has also been reported from Australian waters by Heegaard (1962), under the name Caligus lucidus   ( Table 1), and by Catalano & Hutson (2010) from Arripis truttaceus   .

This copepod is most commonly reported as a parasite of carangids including Caranx melampygus   , C. hippos   , C. caninus   , C. crysos (Mitchill, 1815)   , C. lugubris Poey, 1860   , Carangoides chrysophrys (Cuvier, 1833)   , Megalaspis cordyla (Linnaeus, 1758)   , Pseudocaranx dentex (Bloch & Schneider, 1801)   , Selene vomer (Linnaeus, 1758)   and Seriola   sp. However, it has been reported from a range of other fish families including: Acanthuridae   , Haemulidae   , Ostraciidae   , Paralichthyidae   , Pomacanthidae, Scaridae   and Serranidae (Cressey, 1991)   . In Australian waters Heegaard (1962) recorded it from Nelusetta ayraud (Quoy & Gaimard, 1824)   (as Cantherhines ayraud   ) ( Monacanthidae   ) at Cape Hawke (New South Wales); Catalano & Hutson (2010) reported it from Arripis truttaceus   off the southeastern coast, and the new record from Moreton Bay was from juvenile Gerres   ( Gerreidae   ). Caligus longipedis   is known to be a pest of the carangid Pseudocaranx dentex   cultured in Japanese waters ( Ogawa, 1992).

Kingdom

Animalia

Phylum

Arthropoda

Class

Maxillopoda

Order

Siphonostomatoida

Family

Caligidae

Genus

Caligus

Loc

Caligus longipedis Bassett-Smith, 1898

Boxshall, Geoff 2018
2018
Loc

Serranidae

Cressey 1991
1991
Loc

Caligus lucidus

Heegaard 1962
1962
Loc

C. amplifurcus

Pearse 1953
1953
Loc

C. amplifurcus

Pearse 1953
1953
Loc

C. scabiei

Gnanamuthu 1950
1950
Loc

Caligus longipedis

Bassett-Smith 1898
1898
Loc

Caligus longipedis

Bassett-Smith 1898
1898
Loc

C. caninus

Gunther 1867
1867
Loc

C. lugubris

Poey 1860
1860
Loc

Gerreidae

Bleeker 1859
1859
Loc

Caranx melampygus

Cuvier 1833
1833
Loc

Carangoides chrysophrys

Cuvier 1833
1833
Loc

Nelusetta ayraud

Quoy & Gaimard 1824
1824
Loc

Seriola

Cuvier 1816
1816
Loc

C. crysos

Mitchill 1815
1815
Loc

Ostraciidae

Rafinesque 1810
1810
Loc

Scaridae

Rafinesque 1810
1810
Loc

Pseudocaranx dentex

Bloch & Schneider 1801
1801
Loc

cordyla

Linnaeus 1758
1758
Loc

Selene vomer

Linnaeus 1758
1758