Rhombichthys

{{Short description|Extinct genus of fishes}}

{{Speciesbox

| image = Rhombichthys intocabilis.jpg

| image_caption = Artist's reconstruction

| fossil_range = {{fossil range|Cenomanian}}

| parent_authority = Khalloufi et al., 2010

| display_parents = 5

| taxon = Rhombichthys intoccabilis

| authority = Khalloufi et al., 2010

}}

Rhombichthys intoccabilis is an extinct clupeomorph described from the town of Ein Yabrud, in the West Bank. It lived during the Cenomanian age of the Late Cretaceous epoch.{{Cite journal |author=Bouziane Khalloufi, René Zaragüeta-Bagils & Hervé Lelièvre |year=2010 |title=Rhombichthys intoccabilis, gen. et sp. nov. (Ellimmichthyiformes, Clupeomorpha, Teleostei), from the Cenomanian (Upper Cretaceous) of Ein Yabrud, Middle East: anatomial descriptions and phylogenetic implications |journal=Journal of Vertebrate Paleontology |volume=30 |issue=1 |pages=57–67 |doi=10.1080/02724630903409089|bibcode=2010JVPal..30...57K |s2cid=86625975 |doi-access=free }}

The adults of R. intoccabilis had a very deep, scute-covered belly. In conjunction with the high, triangular dorsal fin, the belly gives the fish a rhombus-shaped body profile, hence the generic name. The juveniles, in contrast, had a far shallower belly, having a rounded profile.