Norileca indica (Milne Edwards, 1840)

Lumayno, Sanny David P., Labrador, Hannah Kathleen S., Barnuevo, Kyle Dominic E., Cabebe-Barnuevo, Roxanne A., Cadiz, Rowena E. & Babaran, Ricardo P., 2023, Infection parameters of Norileca indica and a new record of Ceratothoa carinata (Crustacea: Isopoda: Cymothoidae) on Selar crumenophthalmus (Actinopterygii: Carangiformes: Carangidae) in the waters of the Sibuyan Sea, the Philippines, Acta Ichthyologica et Piscatoria 53, pp. 147-155 : 147

Norileca indica (Milne Edwards, 1840)

(Figs 2 and 3)

Livoneca indica .- Milne-Edwards 1840: 262.- Bleeker 1857: 21.-Schioedte and Meinert 1884: 362, pl. 15, figs 3-6.- Richardson 1910: 24.- Nierstrasz 1915: 99.- Nierstrasz 1931: 142.- Borcea 1933: 482.- Beumer et al. 1982: 33.

Lironeca indica .- Trilles 1976: 77, pl. 2, fig. 3.- Trilles 1979: 266.- Avdeev 1978: 281.- Rokicki 1982: 205, figs 1, 2.

Livoneca ornata .- Heller 1865: 145-146, pl.12, fig. 15.

Material examined.

SC064 (ovigerous female): 20.75 mm TL, host Selar crumenophthalmus , Sibuyan Sea. SC064 (male): 12.26 mm TL, same data as preceding.

Additional material examined.

Four ovigerous females with a size range of 14.72-25.44 mm TL and four males with a size range of 7.17-12.26 mm TL collected from the same host, S. crumenophthalmus , captured in the Sibuyan Sea. SC020 (female): 24.24 mm TL SC020 (male): 10.71 mm TL, SC030 (female): 23.34 mm TL, SC030 (male): 11.93 mm TL, SC050 (female): 25.44 mm TL, SC050 (male): 11.77 mm TL, SC086 (female): 14.72 mm TL, SC086 (male): 7.17 mm TL.

Morphological description of female.

Body twisted; dorsal surface smooth and polished appearance; ventral area soft; narrowest body part at pereonite 1; widest body part at pereonite 4. Cephalon: Triangular shape with rounded apex. Eyes: large and circular. Perionites: seven in total. Perionite 1: shortest in length. Perionites 6 and 7 narrower compared to perionites 1-5. Pleonites: narrow and positioned just behind perionite 7 overlapping with pleonite 2. Pleotelson: triangular and posteriorly pointed; dorsal surface smooth. Uropods: weak and short; visible on both sides of pleotelson in dorsal view; length not extending beyond pleotelson. Pereopods: seven pairs of soft-fleshed pereopods; pereopod 1 smallest; pereopods 2-7 gradually increasing in size. Color in preserved state: dorsal surface generally brown; anterior region light brown, transitioning to darker color towards posterior region; ventral area creamy white; pleotelson dark brown with light edges; uropods ranging from white to transparent; pereopods white.

Morphological description of male.

Body size and shape: significantly smaller than females; body rather straight than twisted; dorsal surface smooth; ventral area predominantly covered with pereopods; narrowest body part at pereonite 1; widest body part at pereonite 5. Cephalon: triangular shape and rounded apex. Eyes: large and oval. Perionites: seven in total. Perionite 1 shortest. Perionites 1-4 with straight posterior margins. Perionites 5-7 with slightly concave posterior margins. Pleonites: narrow and positioned just behind perionite 7 overlapping with pleonite 1. Pleotelson: triangular and bluntly pointed; dorsal surface smooth. Uropods: weak; visible on both sides of pleotelson and nearly reaching apex of the pleotelson in dorsal view. Pereopods: seven pairs of soft-fleshed pereopods; pereopod 1 smallest; pereopods 2-4 approximately similar in size; pereopods 5-7 largest in size. Color in preserved state: dorsal surface pale brown with distinct black chromatophores; ventral area creamy white with brown coloration along edges; pleotelson dark brown with light brown edges; uropods ranging from white to transparent; pereopods white.

Order Isopoda Latreille, 1817

Family Cymothoidae Leach, 1814

Genus Ceratothoa Dana, 1852

Figures

Figure 2. Ovigerous female (SC 064) Norileca indica collected from the branchial cavity of Selar crumenophthalmus captured in the Sibuyan Sea, Philippines in April 2021 (A = dorsal view; B = ventral view).

Figure 3. Male (SC 064) Norileca indica collected from the branchial cavity of Selar crumenophthalmus captured in the Sibuyan Sea, Philippines in April 2021 (A = dorsal view; B = ventral view).