Abstract
A new species of Leptostraca, Nebalia terazakii sp. n. is described and figured. The species was sampled from the coral reefs of Pulau Payar Marine Park, Langkawi, Malaysia. There are 32 existing species of Nebalia but Nebalia terazakii sp. n. can be distinguished from the other known species of Nebalia by the following combination of characters: the rostrum is 1.89 times as long as wide and the eyes have no dorsal papilla or lobes. Article 4 of the antennular peduncle has one short thick distal spine. The proximal article of the endopod of maxilla 2 is shorter than the distal, a feature peculiar to Nebalia terazakii sp. n., the exopod of maxilla 2 is longer than article 1 of the endopod, the posterior dorsal borders of the pleonites 6 to 7 are provided with distally sharp denticles, anal plate with prominent lateral shoulder and finally, the terminal seta of the caudal rami is 1.17 times the length of the entire rami.
Highlights
The leptostracan genus Nebalia was thought to contain only a few species, but with rather a wide range of distribution
When Dahl (1985, 1990) re-examined specimens from the European Shelf and the Southern Oceans, he managed to solve some of the long outstanding problems on the taxonomy of Nebalia
According to Dahl (1985) the taxonomy of the European species was in a state of confusion and the synonymy so interwoven
Summary
The leptostracan genus Nebalia was thought to contain only a few species, but with rather a wide range of distribution.
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