Soleidae: M II A2A

Aseraggodes heemstrai Gon & Randall 2003 (formerly Parachirus)

Dwarf sole

Egg diameter in µm	Number of oil globules	Diameter of oil globule in µm	Yolk texture	Perivitelline space	Position of oil globule at hatch	Gut length   at eye- pigment stage	Myomeres
1150-1320	multiple	NA	clear	narrow	scattered	48% of NL	ca 34

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Egg: This egg was often mistaken for Sarda orientalis (MIIA2), which also has scattered, light amber oil globules (A, but note that the egg on the left is H IIA3A). Later eggs can be recognised by the white pigment in the embryo’s finfolds (B). Incubation is about 60 hours.

Larva: The 1-day larva has 4 big blotches of white pigment in the finfolds (C), which become more numerous in the postflexion, 17-day juvenile, and persist through to the 30-day juvenile. The left eye moves to the right side between 30 (I) and 45 days (J), but was not documented. C: 1 day, D: 3 days, E: 8 days, F: 13 days, G: 17 days, H: 21 days, I: 30 days, J: 45 days (26°C).

The larva proved easy to rear, despite only small numbers of eggs being obtained at any one time. The illustrated series was from 2 specimens reared from a batch of only 3 eggs. To date, no larval or locally collected adult DNA barcode sequences are available.

The egg was first seen in the DHM samples between 1990 and 1994, when the few eggs collected suggested a summer spawner (green graph). Single eggs have subsequently been seen on only 3 occasions off Park Rynie (blue graph), supporting a summer spawning pattern. Only 1 of the 3 was in an inshore sample, but their frequent collection in the DHM samples indicates spawning in shallow water.