Laubuka trevori predorsal scales; aw s well as 5+4+2 teeth on the fifth ceratobranchial bone. "L. trevori" has 14½–15½ branched rays in its anal fin, a relatively short pelvic fin which is about a fifth as long as tits standard length and it has two stripes running along its body: one a golden and the other a blue-green stripe which runs from behind the operculum to the peduncle of the caudal fin which is broken and less distinct towards the head than the golden stripe. Laubuka trevori Laubuka trevori is a species of small fish of the minnow and carp family, Cyprinidae,
Operculum (fish) over time. The fossil record of the threespine stickleback provide the ancestral shapes of the operculum bone. Overall, the operculum bone became more triangular in shape and thicker in size over time. Genes that are essential in the development of the opercular series is the Eda and Pitx1 genes.These genes are known to be a part of the development and loss of armor plates in gnathostomes. The Endothelin1 pathway is thought to be associated with the development of the operculum bone since it regulates dorsal-ventral patterning of the hyomandibular region. Mutations in Edn1-pathway in zebrafish are known to lead to