Nihonotrypaea petalura (Stimpson, 1860)

Kornienko, Elena S., Korn, Olga M. & Golubinskaya, Darya D., 2015, The number of zoeal stages in larval development of Nihonotrypaea petalura (Stimpson, 1860) (Decapoda: Axiidea: Callianassidae) from Russian waters of the Sea of Japan, Zootaxa 3919 (2), pp. 343-361 : 344-345

Nihonotrypaea petalura (Stimpson, 1860)

( Figs 1–12 )

Remarks. We made several attempts to rear the larvae of Nihonotrypaea japonica and N. petalura in the laboratory. It turned out that the larvae N. japonica were very unpretentious, it survival rate in the laboratory was about 100%. Zoeae from all parent females always passed through five stages before molting to the megalopa. At the same time, the mortality of the larvae of N. petalura at earlier stages was high, caused probably by adhesion to water surface (this fact was also noted by Konishi with co-authors). At the end of experiment we have surprisingly found that sixth zoeae of this species molt not to the megalopa but to the next zoeal stage. Thus, all larvae of N.

petalura passed through not only six but even through seven zoeal stages before molting to the megalopa. At 22–23°C the first megalopa was attained 26 days after hatching.

Figures

FIGURE 1. Nihonotrypaea petalura. A – G, lateral view of zoea I – VII; A' – C', frontal margin of zoea I – III, dorsal view; G', pleopod of zoea VII.

FIGURE 2. Nihonotrypaea petalura. A – G, antennule of zoea I – VII.

FIGURE 3. Nihonotrypaea petalura. A – G, antenna of zoea I – VII.

FIGURE 4. Nihonotrypaea petalura. A – G, mandibles of zoea I – VII.

FIGURE 5. Nihonotrypaea petalura. A – G, maxillule of zoea I – VII.

FIGURE 6. Nihonotrypaea petalura. A – G, maxilla of zoea I – VII.

FIGURE 7. Nihonotrypaea petalura. A – G, first maxilliped of zoea I – VII.

FIGURE 8. Nihonotrypaea petalura. A – G, second maxilliped of zoea I – VII.

FIGURE 9. Nihonotrypaea petalura, A – G, third maxilliped of zoea I – VII.

FIGURE 10. Nihonotrypaea petalura. A – F, pereiopod 1 of zoea II – VII; G – L, pereiopod 2 of zoea II – VII.

FIGURE 11. Nihonotrypaea petalura. A – E, pereiopod 3 of zoea III – VII; F – J, pereiopod 4 of zoea III – VII; K – O, pereiopod 5 of zoea III – VII.

FIGURE 12. Nihonotrypaea petalura. A – G, telson with uropods of zoea I – VII; A – C, dorsal view; C ΄ – G, ventral view.