Parasitic copepods of the family Lernanthropidae Kabata, 1979 (Copepoda: Siphonostomatoida) from Australian fishes, with descriptions of seven new species
Author
Boxshall, Geoff A.
Author
Bernot, James P.
Author
Barton, Diane P.
Author
Diggles, Ben K.
Author
Q-Y, Russell
Author
Atkinson-Coyle, Toby
Author
Hutson, Kate S.
text
Zootaxa
2020
2020-02-17
4736
1
1
103
journal article
24025
10.11646/zootaxa.4736.1.1
c76ec731-0dc9-4fc4-8ea4-d90d90da9438
1175-5326
3669745
970D7D36-6D8C-4463-B9EA-D3B8E191BE72
Sagum petersi
(van
Beneden, 1857
)
Syn:
Lernanthropus petersi
van
Beneden, 1857
Paralernanthropus petersi
(van
Beneden, 1857
)
Pseudolernanthropus petersi
(van
Beneden, 1857
)
Material examined:
none.
Differential diagnosis:
Cephalothorax about as long as wide, with evenly convex lateral margins. Trunk irregularly subrectangular, wider than cephalothorax: anterior part of trunk (second and third pedigerous somites) wider than long, produced into tapering posterolateral processes extending about 30% of distance along lateral margins of dorsal trunk plate. Posterior part of trunk covered by broad dorsal trunk plate with rounded hexagonal shape. Dorsal surface of cephalothorax and trunk lacking ornamentation. Urosome formed from fifth pedigerous somite, genital complex and abdomen, all fused. Egg sacs loosely coiled beneath dorsal trunk plate. Paired caudal rami short, tapering towards tip. Leg 2 biramous, with unimerous rami. Leg 3 trilobate, with large, lamellate exopodal lobe orientated horizontally across ventral surface, reaching to posterior end of body, connecting via long posteriorlydirected, flagellum-like middle lobe to smaller rounded inner lobe; flagellate middle lobe extending well beyond posterior margin of dorsal trunk plate. Leg 4 bilobate; with inner and outer lobes long and tapering, distal flagellate parts of both lobes extending well beyond posterior margin of dorsal trunk plate. Body length of
♀
about
5.8 mm
(from
Kabata, 1979a
).
Distribution:
This species was originally described from
Epinephelus fuscoguttatus
(Forsskål, 1775)
(as
Serranus goliath
) caught off
Mozambique
(van
Beneden, 1857
). It was also listed as occurring on an unidentified host caught off
Zaire
by
Brian (1939)
, but in the absence of any voucher specimens or description, this record is in need of confirmation.
Kabata (1979a)
reported
S. petersi
on
Epinephelus lanceolatus
(as
Promicrops lanceolatus
) from Queensland waters.
Remarks:
This species is not well characterized but the trilobate state of the third leg, with the middle flagellum-like lobe extending beyond the posterior margin of the dorsal trunk plate, as described by
Kabata (1979a)
, is unique within the genus.