Gymnapogon sagittarius, a new species of cardinalfish (Perciformes: Apogonidae) from the South China Sea and Andaman Sea

The new cardinalfish Gymnapogon sagittarius sp. nov. is described on the basis of eight specimens from Vietnam, Malaysia and the Andaman Sea. The new species is most similar to the Red Sea species G. melanogaster Gon and Golani 2002 (known only from two specimens) in having 9 soft dorsal-fin rays, 8 soft anal-fin rays, and 13 total gill rakers, but differs in having 16 pectoral-fin rays (vs. 14 or 15 rays in G. melanogaster), body depth 12.0-15.1% of SL (mean 14.2%) (vs. 21.7-24.0%), eye diameter 5.2-6.1% (5.6%) (vs. 10.0-11.6%), interorbital width 3.7-4.4% (4.0%) (vs. 5.7-8.2%), and longest pelvic-fin soft ray length 12.0-15.6% (14.1%) (vs. 25.4-34.3%).